Objectives. To identify plant structures and functions. To describe the structure of plant cells. To explain the process of reproduction in plants.

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2 Objectives To identify plant structures and functions. To describe the structure of plant cells. To explain the process of reproduction in plants. 2

3 Main Menu Plant Cell Biology Plant Structures Roots Stems Flowers Leaves Fruit Seeds 3

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7 Roots Are usually underground Anchor plants in the soil Absorb water and nutrients Store food for the plant 7

8 Root Tissues Include: epidermis cortex vascular cylinder, or stele 8

9 Root Systems Include: taproot system fibrous root system 9

10 Taproot System Found in dicotyledons and conifers Derived directly from the first root emerged from the seed Dicotyledons flowering plants with two seed cotyledons Conifers trees which bear cones and need-like or scale-like leaves 10

11 Taproot System Has one prominent root known as the taproot or primary root 11

12 Fibrous Root System Found in most monocots Consists of an extensive mass of similarly sized roots Monocots flowering plants with only one seed cotyledon 12

13 Root Types Include: taproots lateral roots adventitious roots fibrous roots 13

14 Taproots Single, dominant roots Grow directly downward Sprout other fibrous roots Are modified for food and water storage and uptake 14

15 Lateral Roots Extend horizontally from the taproot Extract nutrients and water from the soil 15

16 Adventitious Roots Form from shoot tissues Arise in stems and leaves Are used when cloning plants from cuttings 16

17 Fibrous Roots Are thin, slender roots Collect water close to the soil surface Sprout from taproots 17

18 18

19 Stems Support the leaves, flowers and fruits of plants Conduct water and nutrients to and from the roots and leaves Store water 19

20 Stem Tissues Include: epidermis cortex xylem phloem cambium 20

21 Stem Types Include: aerial o grow above ground subterranean o grow below ground acaulescent o no obvious stem above or below ground 21

22 Xylem Transports water from the roots to the plant Provides structure and support in the stem Fun Fact In trees, new xylem tissues are produced each year. As these new tissues are added, older xylem tissues die and create the rings that can be seen in tree trunks. 22

23 Phloem Transports sugars and other molecules made during photosynthesis Is always alive 23

24 24

25 Flowers Are organs for sexual reproduction Produce gametes Play a key role in pollination Gamete a mature male or female sex cell which is able to unite with another of the opposite sex in sexual reproduction 25

26 Flower Parts 26

27 Flower Parts Include: peduncle o flower stalk receptacle o part of flower stalk bearing floral organs sepal o leaf structures at flower base, protects young buds, all together known as calyx 27

28 Flower Parts Include: petal o located in and above the sepals, attracts pollinators, all together known as corolla stamen o male part of the flower, makes pollen grains filament o stalk of the stamen, contains the anther 28

29 Flower Parts Include: anther o bears pollen pollen o grains containing the male sex cells pistil o female part of the flower 29

30 Flower Parts Include: stigma o sticky top of pistil, receptive surface for pollen grains style o stalk of the pistil, where pollen tube grows 30

31 Flower Parts Include: ovary o base of the pistil, matures to become fruit ovule o located in the ovary, carries female sex cells 31

32 Flower Types Include: complete o has stamen, pistil, petals and sepals incomplete o one part missing 32

33 Flower Types Include: perfect o both stamen and pistil are present and functioning imperfect o stamen or pistil is missing 33

34 34

35 Leaves Are the major site of food production for the plant Contain structures which convert sunlight to chemical energy 35

36 Leaf Tissues Include: epidermis mesophyll veins 36

37 Leaf Parts 37

38 Leaf Parts Include: midrib o main, central vein of a leaf petiole o leaf stalk which attaches the leaf to the plant stem o main support of the plant 38

39 Leaf Parts Include: stipule o small, leaf-like appendages at the base of the petiole vein o transports water, minerals and food energy throughout the plant 39

40 Leaf Types Include: simple o not divided into separate units compound o leaflets arranged on both sides of an axis 40

41 Leaf Vein Patterns Include: parallel o several large veins run alongside each other from the base of the blade to the tip palmate o several main veins of about equal size, all of which extend from a common point at the base of the leaf. 41

42 Leaf Vein Patterns Include: pinnate o one large, central vein, the midrib, with other large veins branching from the sides 42

43 Leaf Vein Patterns 43

44 Leaf Arrangements Include: alternate o one leaf produced at each node opposite o leaves in pairs at nodes whorled o three or more leaves per node 44

45 Leaf Arrangements 45

46 46

47 Fruit Evolves from the maturing ovary after pollination and fertilization May be either fleshy or dry in appearance Contain one or more seeds 47

48 Fruit Types Include: simple o formed from one ovary aggregate o formed from a single flower with many ovaries multiple o developed from a fusion of separate flowers on a single structure 48

49 49

50 Seeds Contain three parts: seed coat o protects the embryo cotyledon o temporary food supply, also known as seed leaf embryo o young plant 50

51 Seeds 51

52 Monocots Are embryos with a single cotyledon Contain flower parts in multiples of three Have adventitious roots 52

53 Dicots Are embryos with two cotyledons Contain flower parts in multiples of four or five Have roots which form from the radical 53

54 Resources Plant Parts. The Great Plant Escape, Urban Programs Resource Network, University of Illinois Extension. Retrieved from 1facts2e.html (2008). NY/NJ Trails + Rutgers Invasive Plant Monitoring Project. Rutgers School of Environmental and Biological Sciences. Rutgers, The State University of New Jersey. Retrieved from (2003) Plant Structure and Function. Andromeda Botanic Gardens. The University of the West Indies. Retrieved from nction.htm 54

55 Acknowledgements Production Coordinators Katelyn Perry Graphic Designer Melody Rowell Technical Writer Jessica Odom V.P. of Brand Management Executive Producer Clayton Franklin Gordon W. Davis, Ph.D. MMXIV CEV Multimedia, Ltd. 55

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