Plant Responses to Internal and External Signals
|
|
- Moris Barnett
- 5 years ago
- Views:
Transcription
1 LECTURE PRESENTATIONS For CAMPBELL BIOLOGY, NINTH EDITION Jane B. Reece, Lisa A. Urry, Michael L. Cain, Steven A. Wasserman, Peter V. Minorsky, Robert B. Jackson Chapter 39 Plant Responses to Internal and External Signals Lectures by Erin Barley Kathleen Fitzpatrick
2 Concept 39.1: Signal transduction pathways link signal reception to response A potato left growing in darkness produces shoots that look unhealthy, and it lacks elongated roots. These are morphological adaptations for growing in darkness, collectively called etiolation (a) Before exposure to light After exposure to light, a potato undergoes changes called de-etiolation, in which shoots and roots grow normally (b) After a week s exposure to natural daylight
3 A potato s response to light is an example of cell-signal processing The stages are reception, transduction, and response CELL WALL CYTOPLASM 1 Reception 2 Transduction 3 Response Relay proteins and second messengers Activation of cellular responses Receptor Hormone or environmental stimulus Plasma membrane
4 Figure 39.3 CELL WALL CYTOPLASM 1 Reception 2 Transduction 3 Response Relay proteins and second messengers Activation of cellular responses Receptor Hormone or environmental stimulus Plasma membrane
5 Figure Reception CYTOPLASM Plasma membrane Cell wall Light Phytochrome - capable of detecting light - responds to light by: Opens Ca 2+ channels, which increases Ca 2+ levels in the cytosol. - Activates an enzyme that produces cgmp
6 Figure Reception 2 1 Transduction Cell wall Light CYTOPLASM Plasma membrane Phytochrome cgmp Second messenger Responds to light by: Activating an enzyme that produces cgmp - Opens Ca 2+ channels, which increases Ca 2+ levels in the cytosol. Protein kinase 1 Protein kinase 2 Ca 2 channel Ca 2
7 Figure Cell wall 1 Reception 2 Transduction 3 Response Light CYTOPLASM Plasma membrane Phytochrome cgmp Second messenger Protein kinase 1 Stimulation involve increased activity of enzymes. This can occur by transcriptional regulation Protein kinase 2 Transcription factor 1 NUCLEUS Transcription factor 2 P P Transcription Translation Ca 2 channel De-etiolation (greening) response proteins Ca 2
8 Concept 39.2: Plant hormones help coordinate growth, development, and responses to stimuli Tropism - Any response resulting in curvature of organs toward or away from a stimulus. Phototropism- A plant bending toward light only if the tip of the coleoptile was present. That means a signal must transmitted from the tip to the elongating region of the plant.
9 Figure 39.5 RESULTS Control Shaded side Light Illuminated side Boysen-Jensen Light Darwin and Darwin Light Gelatin (permeable) Mica (impermeable) Tip removed Opaque cap Transparent cap Opaque shield over curvature
10 In 1913, Peter Boysen- Jensen demonstrated that the signal was a mobile chemical substance. RESULTS Excised tip on agar cube Growth-promoting chemical diffuses into agar cube In 1926, Frits Went extracted the chemical messenger for phototropism, auxin, by modifying earlier experiments Control Control (agar cube lacking chemical) Offset cubes
11 Auxin Refers to any chemical that promotes elongation of coleoptiles. Indoleacetic acid (IAA) is a common auxin in plants; Auxin is produced in shoot tips and is transported down the stem The Role of Auxin in Cell Elongation - Acid Growth Hypothesis - stimulates proton pumps in the plasma membrane Plasma membrane Cell wall H 2 O The proton pumps lower the ph in the cell wall, activating expansins, enzymes that loosen the wall s fabric With the cellulose loosened, the cell can elongate Nucleus Vacuole Cytoplasm
12 Auxin s Role in Plant Development Pattern formation of the developing plant Reduced auxin flow from the shoot of a branch stimulates growth in lower branches Plays a role in phyllotaxy, the arrangement of leaves on the stem Directs leaf venation pattern Activity of the vascular cambium is under control of auxin transport An overdose of synthetic auxins can kill plants For example 2,4-D is used as an herbicide on eudicots
13 Cytokinins stimulate cytokinesis (cell division) Cytokinins work together with auxin to control cell division and differentiation Control of Apical Dominance Terminal bud suppresses development of axillary buds If the terminal bud is removed, plants become bushier
14 Figure 39.9 Lateral branches Stump after removal of apical bud (b) Apical bud removed Axillary buds (a) Apical bud intact (not shown in photo) (c) Auxin added to decapitated stem
15 Gibberellins have a variety of effects, such as stem elongation, fruit growth, and seed germination Produced in young roots and leaves Stimulate growth of leaves and stems Stimulate cell elongation and cell division (a) Rosette form (left) and gibberellin-induced Bolting (right) Fruit Growth Gibberellins are used in spraying of Thompson seedless grapes (b) Grapes from control vine (left) and gibberellintreated vine (right)
16 Germination After water is imbibed, release of gibberellins from the embryo signals seeds to germinate Aleurone Endosperm GA -amylase Sugar Water GA Scutellum (cotyledon) Radicle
17 Abscisic Acid Abscisic acid (ABA) slows growth Two of the many effects of ABA Seed dormancy Drought tolerance Seed dormancy Ensures that the seed will germinate only in optimal conditions Dormancy is broken when ABA is removed by heavy rain, light, or prolonged cold Drought Tolerance ABA accumulation causes stomata to close rapidly Primary internal signal that enables plants to withstand drought
18 Ethylene Plants produce ethylene in response to stresses such as drought, flooding, mechanical pressure, injury, and infection Effects of ethylene include response to mechanical stress Senescence leaf abscission fruit ripening
19 Senescence is the programmed death of cells (apoptosis) or organs Leaf Abscission A change in the balance of auxin and ethylene controls- abcission layer grows and cuts off nutrients to leaf. Protective layer Stem Petiole 0.5 mm Abscission layer
20 Fruit Ripening Ethylene triggers ripening, and ripening triggers release of more ethylene Fruit producers can control ripening by picking green fruit and controlling ethylene levels
21 Concept 39.3: Responses to light are critical for plant success Light cues many key events in plant growth and development Effects of light on plant morphology are called photomorphogenesis
22 Phototropic effectiveness nm Plants detect light s direction, intensity, and wavelength (color) An action spectrum depicts relative response of a process to different wavelengths Wavelength (nm) (a) Phototropism action spectrum Light Time 0 min Time 90 min (b) Coleoptiles before and after light exposures
23 There are two major classes of light receptors: blue-light photoreceptors - control hypocotyl elongation, stomatal opening, and phototropism phytochromes - responses include seed germination and shade avoidance
24 Red light increased germination, while far-red light inhibited germination The photoreceptor responsible for the opposing effects of red and far-red light is a phytochrome RESULTS Red Dark Red Far-red Dark Dark (control) germination Red Far-red Red Dark Red Far-red Red Far-red Figure 39.17
25 Biological Clocks and Circadian Rhythms Many plant processes oscillate during the day Circadian rhythms cycles that are about 24 hours long and are governed by an internal clock Noon Midnight
26 The Effect of Light on the Biological Clock Phytochrome conversion marks sunrise and sunset, providing the biological clock with environmental cues Photoperiodism the relative lengths of night and day the environmental stimulus plants use most often to detect the time of year
27 Photoperiodism and Control of Flowering Short-day plants flower when a light period is shorter than a critical length Critical Night Length responses to photoperiod are actually controlled by night length Needs a minimum number of hours of darkness Long-day plants flower when a light period is longer than a certain number of hours Needs a maximum number of hours of darkness Day-neutral plants Flowering controlled by plant maturity, not photoperiod
28 Figure hours (a) Short day (long-night) plant Cool season bloomers Light Critical dark period Flash of light Darkness (b) Long-day (short-night) plant spring time bloomers Flash of light
29 A Flowering Hormone? Photoperiod is detected by leaves, which cue buds to develop as flowers The flowering signal is called florigen 24 hours 24 hours 24 hours Graft Short-day plant Long-day plant grafted to short-day plant Long-day plant
30 Gravity Gravitropism - response to gravity Roots show positive gravitropism; Shoots show negative gravitropism Plants may detect gravity by the settling of statoliths, dense cytoplasmic components Primary root of maize bending gravitropically (LMs)
31 Mechanical Stimuli Thigmomorphogenesis - changes in growth that result from touch - results in clingy/wrapping growth occurs in vines and other climbing plants (Cudzu, Ivy) How do you grow Cudzu! It s easy. You throw the seeds to the left and you run to the right!
32 Defenses Against Herbivores Plants counter excessive herbivory with: physical defenses - thorns and trichomes chemical defenses - distasteful or toxic compounds Some plants even recruit predatory animals that help defend against specific herbivores 4 Recruitment of parasitoid wasps that lay their eggs within caterpillars 1 Wounding 1 Chemical in saliva 3 Synthesis and release of volatile attractants 2 Signal transduction pathway
33 Figure Recruitment of parasitoid wasps that lay their eggs within caterpillars 1 Wounding 1 Chemical in saliva 3 Synthesis and release of volatile attractants 2 Signal transduction pathway
34 Figure 39.UN03
35 Figure 39.UN05
10/4/2017. Chapter 39
Chapter 39 1 Reception 1 Reception 2 Transduction CYTOPLASM CYTOPLASM Cell wall Plasma membrane Phytochrome activated by light Cell wall Plasma membrane Phytochrome activated by light cgmp Second messenger
More informationChapter 39 Plant Responses to Internal and External Signals
Chapter 39 Plant Responses to Internal and External Signals Overview: Stimuli and a Stationary Life Plants, being rooted to the ground, must respond to whatever environmental change comes their way For
More informationChapter 33 Control Systems in Plants
Chapter 33 Control Systems in Plants PowerPoint Lectures for Biology: Concepts & Connections, Sixth Edition Campbell, Reece, Taylor, Simon, and Dickey Copyright 2009 Pearson Education, Inc. Lecture by
More informationUnit 8 Plant Form and Function. Chapter 31: Plant Responses to Internal and External Signals
Unit 8 Plant Form and Function Chapter 31: Plant Responses to Internal and External Signals Overview: The Race to Live Young seedlings must outcompete their neighbors in the race for resources in order
More informationBio 100 Guide 27.
Bio 100 Guide 27 http://www.offthemarkcartoons.com/cartoons/1994-11-09.gif http://www.cneccc.edu.hk/subjects/bio/album/chapter20/images/plant_growth.jpg http://pgjennielove.files.wordpress.com/2008/06/apical_meristem.png
More informationChapter 39. Plant Response. AP Biology
Chapter 39. Plant Response 1 Plant Reactions Stimuli & a Stationary Life u animals respond to stimuli by changing behavior move toward positive stimuli move away from negative stimuli u plants respond
More informationChapter 33 Control Systems in Plants
Chapter Control Systems in Plants Figure.0_ Chapter : Big Ideas PowerPoint Lectures for Campbell Biology: Concepts & Connections, Seventh Edition Reece, Taylor, Simon, and Dickey Lecture by Edward J. Zalisko
More informationChapter 39. Plant Reactions. Plant Hormones 2/25/2013. Plants Response. What mechanisms causes this response? Signal Transduction Pathway model
Chapter 39 Plants Response Plant Reactions Stimuli & a Stationary life Animals respond to stimuli by changing behavior Move toward positive stimuli Move away from negative stimuli Plants respond to stimuli
More informationChapter 31 Active Reading Guide Plant Responses to Internal and External Signals
Name: AP Biology Mr. Croft Chapter 31 Active Reading Guide Plant Responses to Internal and External Signals This concept brings together the general ideas on cell communication from Chapter 5.6 with specific
More informationBIOLOGY. Plant Responses to Internal and External Signals CAMPBELL. Reece Urry Cain Wasserman Minorsky Jackson
CAMPBELL BIOLOGY TENTH EDITION Reece Urry Cain Wasserman Minorsky Jackson 39 Plant Responses to Internal and External Signals Lecture Presentation by Nicole Tunbridge and Kathleen Fitzpatrick Stimuli and
More informationCONTROL SYSTEMS IN PLANTS
AP BIOLOGY PLANTS FORM & FUNCTION ACTIVITY #5 NAME DATE HOUR CONTROL SYSTEMS IN PLANTS HORMONES MECHANISM FOR HORMONE ACTION Plant Form and Function Activity #5 page 1 CONTROL OF CELL ELONGATION Plant
More informationPlant Stimuli pp Topic 3: Plant Behaviour Ch. 39. Plant Behavioural Responses. Plant Hormones. Plant Hormones pp
Topic 3: Plant Behaviour Ch. 39 Plants exist in environments that are constantly changing. Like animals, plants must be able to detect and react to stimuli in the environment. Unlike animals, plants can
More informationChapter 39: Plant Responses to Internal and External Signals
AP Biology Reading Guide Fred and Theresa Holtzclaw Julia Keller 12d Chapter 39: Plant Responses to Internal and External Signals 1. What causes a shriveled potato to grow skinny, pale sprouts? Morphological
More informationMajor Plant Hormones 1.Auxins 2.Cytokinins 3.Gibberelins 4.Ethylene 5.Abscisic acid
Plant Hormones Lecture 9: Control Systems in Plants What is a Plant Hormone? Compound produced by one part of an organism that is translocated to other parts where it triggers a response in target cells
More informationPlant Development. Chapter 31 Part 1
Plant Development Chapter 31 Part 1 Impacts, Issues Foolish Seedlings, Gorgeous Grapes Gibberellin and other plant hormones control the growth and development of plants environmental cues influence hormone
More informationPlant Growth and Development
Plant Growth and Development Concept 26.1 Plants Develop in Response to the Environment Factors involved in regulating plant growth and development: 1. Environmental cues (e.g., day length) 2. Receptors
More informationRegulatory Systems in Plants (Ch 39)
Regulatory Systems in Plants (Ch 39) Plants show complex responses to environmental stimuli Problem: no nervous system (detection) & no muscular system (response) Various mechanisms for detecting stimuli
More informationChapter 39: Plant Responses to Internal and External Signals
AP Biology Reading Guide Name Chapter 39: Plant Responses to Internal and External Signals Concept 39.1 Signal transduction pathways link signal reception to response This concept brings together the general
More informationCONTROL OF PLANT GROWTH AND DEVELOPMENT BI-2232 RIZKITA R E
CONTROL OF PLANT GROWTH AND DEVELOPMENT BI-2232 RIZKITA R E The development of a plant the series of progressive changes that take place throughout its life is regulated in complex ways. Factors take part
More informationName Class Date. In the space provided, write the letter of the description that best matches the term or phrase.
Assessment Chapter Test B Plant Responses In the space provided, write the letter of the description that best matches the term or phrase. 1. thigmonasty 2. auxin 3. ethylene 4. phytochrome 5. abscisic
More informationA. Stimulus Response:
Plant Hormones A. Stimulus Response: A house plant on a windowsill grows light. If you rotate the plant, it reorients its growth until its leaves face the window again. The growth of a shoot towards light
More informationPLANTS: RESPONSES AND HORMONES. Student Packet
AP * BIOLOGY PLANTS: RESPONSES AND HORMONES Student Packet AP* is a trademark of the College Entrance Examination Board. The College Entrance Examination Board was not involved in the production of this
More informationChapter 25 Plant Processes. Biology II
Chapter 25 Plant Processes Biology II 25.1 Nutrients and Transport Plants grow by adding new cells through cell division Must have steady supply of raw materials to build new cells Nutrients (most) Plants
More informationcan affect division, elongation, & differentiation of cells to another region of plant where they have an effect
Note that the following is a rudimentary outline of the class lecture; it does not contain everything discussed in class. Plant Hormones Plant Hormones compounds regulators growth or can affect division,
More informationSensory Systems in Plants
Sensory Systems in Plants 1. If temperatures suddenly rise 5 to 10º C, proteins are produced to help stabilize other proteins. 2. Rapid turgor pressure changes in specialized multicellular swellings called
More informationBiology 120 J. Greg Doheny. Chapter 39 Plant Responses to Signals are Mediated by Plant Hormones
Biology 120 J. Greg Doheny Chapter 39 Plant Responses to Signals are Mediated by Plant Hormones Plants are able to change their growth and behavior in response to external signals (ie-growing towards light,
More informationPlant Responses and Adaptations Video
Plant Responses and Adaptations Video Hormone -a substance that is produced in one part of an organism & affects another part of the same individual Plant hormones are chemical substances Control a plant
More informationCONTROL OF GROWTH BY HORMONES
CONTROL OF GROWTH BY HORMONES Growth and organogenesis are controlled......by genes (independent of environment): e.g., number of primary vascular bundles, general shape of a leaf or flower...by genes
More informationCh Plant Hormones
Ch. 39 Plant Hormones I. Plant Hormones Chemical signals that coordinate the parts of an organism. Only minute amounts are needed to get the desired response. Control plant growth and development by affecting
More informationUnit Two: Chemical Control
Unit Two: Chemical Control 3.1 Plant growth and development are regulated by hormones Tropism is a biological phenomenon in which plants grow toward or away from an environmental stimulus, such as light,
More informationPlant. Responses and Adaptations. Plant Hormones. Plant Hormones. Auxins. Auxins. Hormones tell plants:
Plant Responses and Adaptations Plant Hormones Hormone - a substance that is produced in 1 part of an organism & affects another part of the same individual (a chemical messenger) Plant hormones are chemical
More informationPage 1. Skill: Application/Analysis. Skill: Synthesis/Evaluation. Skill: Synthesis/Evaluation
Chapter 39 Plant Responses to Internal and External Signals Multiple-Choice Questions 1) All of the following may function in signal transduction in plants except A) calcium ions. B) nonrandom mutations.
More informationAP Plants II Practice test
AP Plants II Practice test Multiple Choice Identify the letter of the choice that best completes the statement or answers the question. The figure below shows the results of a study to determine the effect
More informationCampbell's Biology: Concepts and Connections, 7e (Reece et al.) Chapter 33 Control Systems in Plants Multiple-Choice Questions
Campbell's Biology: Concepts and Connections, 7e (Reece et al.) Chapter 33 Control Systems in Plants 33.1 Multiple-Choice Questions 1) Which of the following is a health benefit associated with increasing
More informationPLANT GROWTH. IB Topic 9.3 & 9.4 Urry text ref: Ch 28 & 31
PLANT GROWTH IB Topic 9.3 & 9.4 Urry text ref: Ch 28 & 31 INDETERMINATE GROWTH = throughout life meristems like stem cells in humans Shoot tip (shoot apical meristem and young leaves) lateral Axillary
More informationChapter 33 Plant Responses
Chapter 33 Plant Responses R. Cummins 1 Chapter 33 Plant Responses External Factors Light, Day Length, Gravity, Temperature Internal Factors Hormones R. Cummins 2 Tropisms R. Cummins 3 Phototropism and
More informationCh 25 - Plant Hormones and Plant Growth
Ch 25 - Plant Hormones and Plant Growth I. Patterns of plant growth A. Plant continue to grow, even in old age. i.e. new leaves, needles, new wood, new cones, new flowers, etc. B. Meristem continues to
More informationWater Potential. The physical property predicting the direction in which water will flow. Pressure
Transport In Plants Water Potential The physical property predicting the direction in which water will flow Pressure water moves from high water potential to low water potential Water Potential (a) Left
More informationPlant Responses. NOTE: plant responses involve growth and changes in growth. Their movement is much slower than that of animals.
Plant Responses A stimulus is anything that causes a reaction in an organism. Examples: light, gravity and temperature A response is the activity of an organism as a result of a stimulus. Examples: Growth,
More informationBIO1PS 2012 Plant Science Lecture 4 Hormones Pt. I
BIO1PS 2012 Plant Science Lecture 4 Hormones Pt. I Dr. Michael Emmerling Department of Botany Room 410 m.emmerling@latrobe.edu.au Hormones and Ghost gum Eucalyptus papuana Coordination ~3 Lectures Leaves
More informationReproduction, Seeds and Propagation
Reproduction, Seeds and Propagation Diploid (2n) somatic cell Two diploid (2n) somatic cells Telophase Anaphase Metaphase Prophase I One pair of homologous chromosomes (homologues) II Homologues condense
More informationBiology. Chapter 27. Plant Reproduction and Development. Concepts and Applications 9e Starr Evers Starr. Cengage Learning 2015
Biology Concepts and Applications 9e Starr Evers Starr Chapter 27 Plant Reproduction and Development 27.1 What Are the Structure and Function of Flowers? Flowers: reproductive structures of angiosperms
More informationPlants are sessile. 10d-17/giraffe-grazing.jpg
Plants are sessile www.mccullagh.org/db9/ 10d-17/giraffe-grazing.jpg Plants have distinct requirements because of their sessile nature Organism-level requirements Must adjust to environment at given location
More informationChapter Introduction Lesson 1 Energy Processing in Plants Lesson 2 Plant Responses Chapter Wrap-Up
Chapter Introduction Lesson 1 Energy Processing in Plants Lesson 2 Plant Responses Chapter Wrap-Up Materials for Plant Processes Xylem and phloem the vascular tissue in most plants transport materials
More informationORGANISMS RESPOND TO CHANGES IN THEIR INTERNAL AND EXTERNAL ENVIRONMENTS
MODULE 6 ORGANISMS RESPOND TO CHANGES IN THEIR INTERNAL AND EXTERNAL ENVIRONMENTS BIOLOGY NOTES I have designed and compiled these beautiful notes to provide a detailed but concise summary of this module.
More informationClass XI Chapter 15 Plant Growth and Development Biology
Question 1: Define growth, differentiation, development, dedifferentiation, redifferentiation, determinate growth, meristem and growth rate. (a) Growth It is an irreversible and permanent process, accomplished
More informationClass XI Chapter 15 Plant Growth and Development Biology
Question 1: Define growth, differentiation, development, dedifferentiation, redifferentiation, determinate growth, meristem and growth rate. (a) Growth It is an irreversible and permanent process, accomplished
More informationAP Biology Plant Control and Coordination
AP Biology Plant Control and Coordination 1. What is the effect of the plant hormone ethylene on fruit ripening? 2. How does fruit change as it ripens? 3. What is the mechanism behind ripening? 4. Why
More informationChapter 26: Flowering Plants: Control of Growth Responses
Chapter 26: Flowering Plants: Control of Growth Responses AP Curriculum Alignment Big Idea 2 explains that organisms maintain homeostasis by using positive and negative feedback mechanisms. A plant s response
More information(A) Ethylene (B) Absisic acid (C) Auxin (D) Gibberellin (E) Cytokinin
College Biology - Problem Drill 17: Plant Function Question No. 1 of 10 1. Which of the following plant hormones is responsible for phototropism? Question #01 (A) Ethylene (B) Absisic acid (C) Auxin (D)
More informationCytokinin. Fig Cytokinin needed for growth of shoot apical meristem. F Cytokinin stimulates chloroplast development in the dark
Cytokinin Abundant in young, dividing cells Shoot apical meristem Root apical meristem Synthesized in root tip, developing embryos, young leaves, fruits Transported passively via xylem into shoots from
More informationResponses to Light. Responses to Light
Sensory Systems in Plants Chapter 41 Pigments other than those used in photosynthesis can detect light and mediate the plant s response to it Photomorphogenesis refers to nondirectional, light-triggered
More informationPlant Responses to Internal and External Signals
Chapter 39 Plant Responses to Internal and External Signals Overview: Stimuli and a Stationary Life Linnaeus noted that flowers of different species opened at different times of day and could be used as
More informationPLANT HORMONES AND PLANT DEFENCE MECHANISMS 24 APRIL 2013
PLANT HORMONES AND PLANT DEFENCE MECHANISMS 24 APRIL 2013 Lesson Description In this lesson, we: Discuss general functions of the following plant hormones: - Auxins - Gibberellins - Abscisic acid Discuss
More informationPlant hormones: a. produced in many parts of the plant b. have many functions
Plant hormones: a. produced in many parts of the plant b. have many functions Illustrated with 4 plant hormones: Gibberellins Auxin Cytokinins Ethylene Gibberellins Gibberellins illustrate how plant hormones
More informationPLANT STRUCTURE AND FUNCTION Read pages Re-read and then complete the questions below.
PLANT STRUCTURE AND FUNCTION Read pages 600-602. Re-read and then complete the questions below. 1. PLANT TISSUES - plant tissues are made up of 3 basic cell types: Parenchyma, Collenchyma or Sclerenchyma
More informationPlant Responses to Internal and External Signals Lecture Outline
Plant Responses to Internal and External Signals Lecture Outline Overview: Stimuli and a Stationary Life At every stage in the life of a plant, sensitivity to the environment and coordination of responses
More informationCBSE Quick Revision Notes (Class-11 Biology) CHAPTER-15 PLANT GROWTH AND DEVELOPMENT
CBSE Quick Revision Notes (Class-11 Biology) CHAPTER-15 PLANT GROWTH AND DEVELOPMENT Root, stem leaves, flower, fruits and seeds arise in orderly manner in plants. The sequence of growth is as follows-
More informationGrowth and development of plants influenced by: Genetic factors External environmental factors Chemicals Plants respond to chemicals that are
Plant Responses PLANT HORMONES Growth and development of plants influenced by: Genetic factors External environmental factors Chemicals Plants respond to chemicals that are naturally inside them and to
More informationLECTURE 4: PHOTOTROPISM
http://smtom.lecture.ub.ac.id/ Password: https://syukur16tom.wordpress.com/ LECTURE 4: PHOTOTROPISM LECTURE FLOW 1. 2. 3. 4. 5. INTRODUCTION DEFINITION INITIAL STUDY PHOTROPISM MECHANISM PHOTORECEPTORS
More informationLevel 2 Plant Growth and Development Part I Toby Day MSU Extension Horticulture Associate Specialist
Level 2 Plant Growth and Development Part I Toby Day MSU Extension Horticulture Associate Specialist Pages 24-38 Montana Master Gardener Handbook Plant Growth and Development Whole Plant Organs Tissues
More informationPLANT HORMONES-Introduction
PLANT HORMONES-Introduction By convention hormone are said to be a substances whose site of synthesis and site of action are different; the two events are separated by space and time. Hormones are known
More information23-. Shoot and root development depend on ratio of IAA/CK
Balance of Hormones regulate growth and development Environmental factors regulate hormone levels light- e.g. phototropism gravity- e.g. gravitropism temperature Mode of action of each hormone 1. Signal
More information15. PHOTOPERIODISM. 1. Short day plants
15. PHOTOPERIODISM Photoperiodism is the phenomenon of physiological changes that occur in plants in response to relative length of day and night (i.e. photoperiod). The response of the plants to the photoperiod,
More informationPlant Growth and Development
1. Define plasticity. Give an example? A: Plant Growth and Development The ability of the plants to follow different pathways in response to the environment or phases of life to form different kinds of
More informationUseful Propagation Terms. Propagation The application of specific biological principles and concepts in the multiplication of plants.
Useful Propagation Terms Propagation The application of specific biological principles and concepts in the multiplication of plants. Adventitious Typically describes new organs such as roots that develop
More informationPlant hormones. Characteristics
Plant hormones Plant hormones (also known as phytohormones) are chemicals that regulate plant growth, which, in the UK, are termed 'plant growth substances'. Plant hormones are signal molecules produced
More information*Lab Make-up option* Dynamic Plant Plant Movements, Hormones & Defense Systems
Dynamic Plant Plant Movements, Hormones & Defense Systems Resurrection plant Selaginella lepidophylla A Club moss, Lycophyta *Lab Make-up option* Weed Profile Project Pick a common weed in Oregon and create
More informationTrees are: woody complex, large, long-lived self-feeding shedding generating systems compartmented, self optimizing
BASIC TREE BIOLOGY Trees are: woody complex, large, long-lived self-feeding shedding generating systems compartmented, self optimizing Roots: absorb water and minerals store energy support and anchor
More informationPlant Growth Regulators(NCERT)
Plant Growth Regulators(NCERT) Promoters: 1. Auxins: -first isolated from urine, contains Zinc. -Natural: Indole Acetic Acid (IAA) Indole Butyric Acid (IBA) -Synthetic: Naphthalene Acetic Acid (NAA) 2-4
More informationPLANT PHYSIOLOGY. a- Photoperiodism c- Vernalization. b- Auxin precursors d- plant development.
Benha university Faculty of science Botany Department Micro&chem.. 3 th year Exam. 2013 PLANT PHYSIOLOGY Q1: Define the following:- a- Photoperiodism c- Vernalization b- Auxin precursors d- plant development.
More informationREVIEW 7: PLANT ANATOMY & PHYSIOLOGY UNIT. A. Top 10 If you learned anything from this unit, you should have learned:
Period Date REVIEW 7: PLANT ANATOMY & PHYSIOLOGY UNIT A. Top 10 If you learned anything from this unit, you should have learned: 1. Gas exchange a. structure: stomates b. function: diffusion, supports
More informationRapid Learning Center Presents. Teach Yourself AP Biology in 24 Hours. Plant Function. AP Biology Rapid Learning Series
Rapid Learning Center Chemistry :: Biology :: Physics :: Math Rapid Learning Center Presents Teach Yourself AP Biology in 24 Hours *AP is a registered trademark of the College Board, which does not endorse,
More informationWhat were some challenges that plants had to overcome as they moved to land? Drying out in the sun Conserving water Reproduction without water
Classification of Plants (Ch. 22) The 3 major characteristics that make an organism a plant are: Multicellular eukaryote Cell walls with cellulose Carry out photosynthesis Plants most likely evolved from:
More informationHomeostasis of Plants
Homeostasis of Plants Transport, Reproduction, and Responses Domain Bacteria Domain Archaea Domain Eukarya 2007-2008 Common ancestor Plant Diversity Bryophytes non-vascular land plants mosses Pteridophytes
More informationTypes of Plants. Unit 6 Review 5/2/2011. Plants. A. pine B. moss C. corn plant D. bean plant E. liverwort
Unit 6 Review Plants Initial questions are worth 1 point each. Each question will be followed by an explanation All questions will be asked a second time at the very end, each of those questions will be
More informationBiology 213 Exam 3 Practice Key
Biology 213 Practice Key 1. (4) Explain the difference between a macronutrient and a micronutrient and cite two examples of each category? Macronutrients are the minerals needed by the plant in greater
More informationStructures and Functions of Living Organisms
Structures and Functions of Living Organisms 6.L.1 Understand the structures, processes and behaviors of plants that enable them to survive and reproduce. 6.L.1.1 Summarize the basic structures and functions
More informationChapter C3: Multicellular Organisms Plants
Chapter C3: Multicellular Organisms Plants Multicellular Organisms Multicellular organisms have specialized cells of many different types that allow them to grow to a larger size than single-celled organisms.
More informationPLANT GROWTH AND DEVELOPMENT
84 BIOLOGY, EXEMPLAR PROBLEMS CHAPTER 15 PLANT GROWTH AND DEVELOPMENT MULTIPLE CHOICE QUESTIONS 1. Ethylene is used for a. Retarding ripening of tomatoes b. Hastening of ripening of fruits c. Slowing down
More informationThis is sometimes referred to as an Organizational Hierarchy
Chapter 11 Plant Structure and Function Introduction: Cell Specialization 1. Life in general In order to carry out the basic processes of life: Food production (photosynthesis) Intake of water and nutrients
More informationDescribe plant meristems. Where are they located? perpetually embryonic cells found at tips of roots and shoots (apical vs.
Which conditions have the higher rate of transpiration? Light or dark: Humid or dry: Breezy or still air: Hot or warm: light (need CO 2 for photosyn.) dry (lower H 2 O potential out) breezy (greater evaporation)
More informationPlant Structure and Organization - 1
Plant Structure and Organization - 1 In our first unit of Biology 203 we will focus on the structure and function of the higher plants, in particular the angiosperms, or flowering plants. We will look
More informationPlant Processes. Plant Responses
CHAPTER 11 Plant Processes LESSON 2 Plant Responses What do you think? Read the three statements below and decide whether you agree or disagree with them. Place an A in the Before column if you agree with
More informationd. Abscisic Acid (ABA) e. Ethylene
AP Bio Plant Unit Review Guide and FRQs Plant Diversity Ch 23 1. List characteristics that distinguish plants from other organisms in other kingdoms. 2. Distinguish between sporophyte or gametophyte, which
More informationPlant Growth and Development
Plant Growth and Development Growth : An irreversible permanent increase in size of an organ or its parts or even of an individual cell. Growth is accompanied by metabolic process that occurs at the expense
More informationChapter 23: Plant Diversity and Life Cycles
Chapter 23: Plant Diversity and Life Cycles Section 1: Introduction to Plants Cuticle: a waxy or fatty and watertight layer on the external wall of epidermal cells Spore: a reproductive cell or multicellular
More information3 Plant Development and Responses
CHAPTER 13 3 Plant Development and Responses SECTION Plant Processes 7.1.f, 7.5.a California Science Standards BEFORE YOU READ After you read this section, you should be able to answer these questions:
More informationPRACTICE EXAM HORT 201 2nd EXAM from Fall 1999
PRACTICE EXAM HORT 201 2nd EXAM from Fall 1999 1) Which of the following is the naturally occurring auxin in plants? a) indolebutyric acid b) naphthaleneacetic acid c) indoleacetic acid d) zeatin e) kinetin
More informationPlant Growth Regulators
Plant Growth Regulators Dr.H.B.Mahesha, Yuvaraja s College, University of Mysore, India. Growth is an important factor of living organism defined as a permanent and irreversible change in size or volume
More informationCampbell Essential Biology, 6e (Simon/Dickey/Hogan/Reece) Chapter 29 The Working Plant
Campbell Essential Biology, 6e (Simon/Dickey/Hogan/Reece) Chapter 29 The Working Plant Chapter 29 Learning Outcomes 29 Biology and Society: Planting Hope in the Wake of Disaster 29.1. Explain how phytoremediation
More informationSignal Transduction: Ethylene PSI AP Biology
Signal Transduction: Ethylene PSI AP Biology Name: Objective Students will analyze the role ethylene plays as a plant hormone in the signal transduction pathway of fruit ripening. Students will use their
More informationLesson 2 Plant Responses
Lesson 2 Plant Responses Student Labs and Activities Page Launch Lab 25 Content Vocabulary 26 Lesson Outline 27 MiniLab 29 Content Practice A 30 Content Practice B 31 Math Skills 32 School to Home 33 Key
More informationAshley Pearson Plant Classification and Seeds. Green and Gorgeous Oxfordshire Cut flowers Small amounts of veg still grown and sold locally
Ashley Pearson Plant Classification and Seeds Green and Gorgeous Oxfordshire Cut flowers Small amounts of veg still grown and sold locally Different Classification Systems Classification by Life Cycle
More informationPlant Propagation PLS 3221/5222
Plant Propagation PLS 3221/5222 Dr. Sandra Wilson Dr. Mack Thetford Chapter 2 Introduction to the Biology of Plant Propagation -A review- 1 5. Plant Hormones and Plant development Phytohormones Nt Naturally
More informationIs that artificial turf or real grass? Its thicker than Bermuda!
Is that artificial turf or real grass? Its thicker than Bermuda! 1 Using Plant Growth Regulators Growth regulators DO NOT interfere with plant respiration, photosynthesis, or other internal plant functions
More informationKnight s Essential Botany
Knight s Essential Botany Plant Tissues When you look outside at plants you should notice that there is an amazing variation in their form. Despite these variations in form, all plants have the same basic
More informationPlant Growth & Development. By: Johnny M. Jessup Agriculture Teacher/FFA Advisor
Plant Growth & Development By: Johnny M. Jessup Agriculture Teacher/FFA Advisor Introduction There are 7 plant processes that effect growth which are. Photosynthesis Respiration Absorption Transpiration
More informationElectromagenetic spectrum
Light Controls of Plant Development 1 Electromagenetic spectrum 2 Light It is vital for photosynthesis and is also necessary to direct plant growth and development. It acts as a signal to initiate and
More informationMorphology, Anatomy and Physiology of Flowering Plants
Morphology, Anatomy and Physiology of Flowering Plants Plant Anatomy Morphology of a flowering plant: Monocot vs. Dicot Traditionally, the flowering plants have been divided into two major groups, or classes:
More information