Journal of Plant Resources and Environment
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1 Journal of Plant Resources and Environment Toona sinensis A. Juss. Roem LT LT 50 LT LT LT LT LT Q S DOI /j. issn A Differences in water and osmoregulation substance contents in Toona sinensis from different provenances under low temperature stress and their correlation to cold tolerance YANG Yuzhen 1 CHEN Gang 1 PENG Fangren 2 WANG Guoxia 1 LUO Qing 1 MA Xiao 3 1. College of Life Sciences Zhengzhou Normal University Zhengzhou China 2. College of Forestry Nanjing Forestry University Nanjing China 3. Department of Environment Artistic Engineering He nan Vocational and Technical College Zhengzhou China J. Plant Resour. & Environ Abstract Taking ten provenances of Toona sinensis A. Juss. Roem. from different locations as researching subjects and temperature 25 as the control changes in water content indexes including contents of total water free water and bound water and ratio of free water content to bound water content and osmoregulation substance content including soluble sugar and proline contents in leaf under low temperature stress conditions of and - 10 were compared and correlations between these indexes and the low semilethal temperature LT 50 were analyzed. The results show that under conditions from 5 to - 5 total water content free water content and ratio of free water content to bound water content in leaf of T. sinensis seedlings from different provenances all are
2 48 23 lower than those of the control and above indexes of most provenances decrease gradually with decreasing of temperature bound water content in leaf of seedlings from different provenances is higher than that of the control and reaches the highest value under condition of 0 contents of soluble sugar and proline in leaf of seedlings from most provenances increase continuously with decreasing of temperature. Under condition of - 10 total water content and free water content in leaf of all provenances and ratio of free water content to bound water content in leaf of most provenances all are higher than those under condition of - 5 but contents of bound water soluble sugar and proline all are lower than those under condition of - 5. The results of correlation analysis show that under condition of 5 there is significantly negative correlation between bound water content and LT 50 and there is significantly positive correlation between ratio of free water content to bound water content and LT 50 while under conditions of 0-5 and - 10 there is no significantly negative and significantly positive correlations between the two indexes and LT 50 respectively. There is significantly positive correlation between free water content in leaf and LT 50 under conditions of 5 and - 5 while there is no significantly positive correlation between them under conditions of 0 and There is no significantly negative correlation between contents of soluble sugar and proline and LT 50 under condition of 5 while there is significantly negative correlation between them under conditions of 0-5 and It is suggested that ten provenances tested of T. sinensis all are not tolerant to - 10 low temperature stress the tolerance threshold of T. sinensis to lower temperature should be confirmed from - 5 to Key words Toona sinensis A. Juss. Roem. provenance water content osmoregulation substance cold tolerance correlation analysis Toona sinensis A. Juss. Roem kg 1 V C 20 cm CK d 1 48 h h 3 5 LT LT 50 EXCEL 2003
3 LT 50 Table 1 Natural survey of location and the low semilethal temperature LT 50 of provenances tested of Toona sinensis A. Juss. Roem. Latitude Longitude /m Altitude / Annual mean temperature /mm /d Annual mean precipitation Frost-free period LT 50 / Nanjing of Jiangsu N25 25' E114 33' Guangyuan of Sichuan N26 41' E116 13' Dongkou of Hu nan N27 05' E113 30' Suizhou of Hubei N31 15' E112 13' Xixia of He nan N31 43' E105 35' Ankang of Shaanxi N31 53' E119 36' Qianxi nan of Guizhou N32 18' E118 20' Xiapu of Fujian N33 53' E113 57' Ji nan of Shandong N35 14' E115 20' Heze of Shandong N36 40' E117 00' SPSS 珚 X ± SD 1 Table 2 Change of total water content in leaf of Toona sinensis A. Juss. Roem. seedlings from different provenances under low temperature stress 珚 X ± SD 1 /% Total water content in leaf treated by different temperatures Nanjing of Jiangsu ± 0. 33Aa ± 0. 19Bb ± 0. 62Cc ± 0. 43Ee ± 0. 69Dd Guangyuan of Sichuan ± 0. 06Aa ± 0. 07Bb ± 1. 35Bb ± 0. 78Dd ± 0. 43Cc Dongkou of Hu nan ± 0. 75Aa ± 0. 37Bb ± 1. 04Bb ± 1. 11Dd ± 0. 91Cc Suizhou of Hubei ± 2. 16Aa ± 0. 37Bb ± 0. 39Bb ± 0. 16Dd ± 0. 38Cc Xixia of He nan ± 0. 52Aa ± 0. 62Bb ± 2. 01Bb ± 0. 39Dd ± 0. 42Cc Ankang of Shaanxi ± 1. 22Aa ± 0. 74Aa ± 0. 35Bb ± 0. 71Dd ± 0. 08Cc Qianxi nan of Guizhou ± 0. 49Aa ± 1. 24Bb ± 0. 25Bb ± 0. 18Dd ± 2. 47Cc Xiapu of Fujian ± 0. 54Aa ± 0. 47Bb ± 1. 32Cc ± 0. 06Ee ± 2. 41Dd Ji nan of Shandong ± 0. 55Aa ± 0. 19Aa ± 1. 21Aa ± 2. 61Cc ± 3. 21Bb Heze of Shandong ± 0. 33Aa ± 0. 24ABb ± 1. 23Bb ± 1. 71Dd ± 1. 29Cc 1 3 Datums in this table are the average of three replications.
4 珚 X ± SD 1 Table 3 Change of free water content in leaf of Toona sinensis A. Juss. Roem. seedlings from different provenances under low temperature stress 珚 X ± SD 1 /% Free water content in leaf treated by different temperatures Nanjing of Jiangsu ± 2. 91Aa ± 1. 44Bb ± 5. 81Cc ± 1. 64Cc ± 2. 82Cc Guangyuan of Sichuan ± 2. 91Aa ± 2. 87ABb ± 0. 85Cd ± 9. 37BCcd ± 2. 84BCbc Dongkou of Hu nan ± 5. 79Aa ± 1. 44ABb ± 1. 44Cc ± 1. 64CDc ± 0. 29Bb Suizhou of Hubei ± 1. 82Aa ± 1. 00ABb ± 1. 42Cc ± 5. 21Cc ± 2. 87Bb Xixia of He nan ± 5. 22Aa ± 0. 57Bb ± 2. 83Cc ± 4. 31Cc ± 0. 29Bb Ankang of Shaanxi ± 2. 88Aa ± 2. 87ABab ± 3. 21Bc ± 9. 95Bc ± 4. 19ABbc Qianxi nan of Guizhou ± 8. 42Aa ± Aab ± 1. 44Ab ± Bb ± 5. 77Aab Xiapu of Fujian ± 5. 01Aa ± 2. 32ABb ± 1. 44BCc ± 8. 26Cc ± 6. 34BCb Ji nan of Shandong ± 8. 65Aa ± 8. 61Aab ± 5. 69Ab ± Ab ± 0. 29Aab Heze of Shandong ± 4. 36Aa ± 8. 90Aab ± 1. 43Ab ± 2. 23Ab ± 2. 87Aab 1 3 Datums in this table are the average of three replications 珚 X ± SD 1 Table 4 Change of bound water content in leaf of Toona sinensis A. Juss. Roem. seedlings from different provenances under low temperature stress 珚 X ± SD 1 /% Bound water content in leaf treated by different temperatures Nanjing of Jiangsu ± 3. 25Bc ± 1. 25Bb ± 6. 31Aa ± 1. 29Bb ± 3. 58Bc Guangyuan of Sichuan ± 2. 97Bbc ± 2. 82Bb ± 0. 51Aa ± 9. 75Bb ± 2. 74Bc Dongkou of Hu nan ± 5. 04Bb ± 1. 07Bb ± 2. 48Aa ± 1. 98Bb ± 0. 13Cc Suizhou of Hubei ± 3. 45Cc ± 1. 37BCc ± 1. 03Aa ± 5. 07ABb ± 3. 93Dd Xixia of He nan ± 5. 74Cc ± 0. 05BCb ± 4. 84Aa ± 4. 06ABab ± 0. 79Dd Ankang of Shaanxi ± 1. 66ABb ± 3. 61Aab ± 0. 35Aa ± Aab ± 0. 81Bc Qianxi nan of Guizhou ± 8. 91Aa ± Aa ± 1. 69Aa ± Aa ± 3. 54Ab Xiapu of Fujian ± 5. 55Bb ± 1. 85ABa ± 1. 44Aa ± 8. 31Aa ± 6. 56Bb Ji nan of Shandong ± 8. 10ABab ± 8. 42ABab ± 6. 90Aa ± ABab ± 1. 67Bb Heze of Shandong ± 4. 69Aab ± 9. 14Aab ± 2. 66Aa ± Aa ± 1. 47Ab 1 3 Datums in this table are the average of three replications.
5 珚 X ± SD 1 Table 5 Change of ratio of free water content to bound water content in leaf of Toona sinensis A. Juss. Roem. seedlings from different provenances under low temperature stress 珚 X ± SD 1 Ratio of free water content to bound water content in leaf treated by different temperatures Nanjing of Jiangsu ± 0. 37Aa ± 0. 09Bb ± 0. 19Bbc ± 0. 07Bc ± 0. 23Bc Guangyuan of Sichuan ± 0. 35Aa ± 0. 18ABab ± 0. 02Cc ± 0. 52BCbc ± 0. 31ABCb Dongkou of Hu nan ± 0. 47Aa ± 0. 09BCc ± 0. 08Cd ± 0. 09Cd ± 0. 24Bb Suizhou of Hubei ± 0. 26Aa ± 0. 08Bbc ± 0. 04Bc ± 0. 19Bc ± 0. 92ABb Xixia of He nan ± 0. 62Aa ± 0. 02Cc ± 0. 11Cc ± 0. 16Cc ± 0. 18Bb Ankang of Shaanxi ± 0. 19Aa ± 0. 19ABCbc ± 0. 13Cc ± 0. 52BCc ± 0. 07ABab Qianxi nan of Guizhou ± 1. 33Aab ± 0. 84Aab ± 0. 07Ab ± 0. 61Ab ± 0. 78Aa Xiapu of Fujian ± 1. 14Aa ± 0. 16Aab ± 0. 06Ab ± 0. 44Ab ± 1. 52Aa Ji nan of Shandong ± 0. 72Aa ± 0. 56Aa ± 0. 21Aa ± 1. 16Aa ± 0. 14Aa Heze of Shandong ± 0. 49Aa ± 0. 59Aa ± 0. 07Aa ± 2. 43Aa ± 0. 43Aa 1 3 Datums in this table are the average of three replications. 6 珚 X ± SD 1 Table 6 Change of soluble sugar content in leaf of Toona sinensis A. Juss. Roem. seedlings from different provenances under low temperature stress 珚 X ± SD 1 /mg g - 1 Soluble sugar content in leaf treated by different temperatures Nanjing of Jiangsu ± 5. 77Dc ± BCDbc ± 9. 69BCb ± Aa ± BCDb Guangyuan of Sichuan ± 2. 27Cd ± BCc ± 2. 98ABb ± Aa ± 9. 49Ccd Dongkou of Hu nan ± 8. 66Cc ± 4. 33BCbc ± Bb ± Aa ± BCc Suizhou of Hubei ± Cc ± BCbc ± Bb ± Aa ± 3. 34BCbc Xixia of He nan ± 1. 65Dd ± 3. 74Cc ± Bb ± Aa ± 9. 69Cc Ankang of Shaanxi ± 1. 86Cc ± BCbc ± ABab ± Aa ± 2. 68ABCb Qianxi nan of Guizhou ± 7. 22Bb ± Bb ± Bb ± 5. 57Aa ± 2. 06Bb Xiapu of Fujian ± 7. 81CDc ± BCb ± 7. 01Bb ± 5. 28Aa ± 2. 47Dc Ji nan of Shandong ± 0. 21Dd ± 9. 91Cc ± 7. 84Bb ± 0. 79Aa ± 1. 03Cc Heze of Shandong ± 2. 47Ee ± 1. 24Dd ± 0. 82Bb ± 3. 96Aa ± 0. 82Cc 1 3 Datums in this table are the average of three replications.
6 珚 X ± SD 1 Table 7 Change of proline content in leaf of Toona sinensis A. Juss. Roem. seedlings from different provenances under low temperature stress 珚 X ± SD 1 /μg g - 1 Proline content in leaf treated by different temperatures Nanjing of Jiangsu ± Ab ± 3. 38Aa ± Aa ± Aa ± Aa Guangyuan of Sichuan ± 0. 42Bc ± Bb ± Aa ± Aa ± Bc Dongkou of Hu nan ± 5. 71Aa ± Aa ± Aa ± Aa ± 5. 07Aa Suizhou of Hubei ± 4. 65BCcd ± 4. 02ABCbc ± Aab ± 1. 06Aa ± Cd Xixia of He nan ± 4. 65Bc ± Bb ± Aa ± Aa ± 3. 59Bbc Ankang of Shaanxi ± 1. 90Bb ± 5. 71ABb ± Aa ± 4. 23Aa ± Bb Qianxi nan of Guizhou ± Bb ± ABb ± 9. 72Aa ± 3. 38Aa ± ABb Xiapu of Fujian ± Bb ± 2. 11ABab ± Aa ± ABa ± 8. 45Bb Ji nan of Shandong ± 2. 32Ee ± Cc ± Bb ± Aa ± 5. 92Dd Heze of Shandong ± 8. 66Dc ± BCb ± ABa ± 4. 23Aa ± 7. 82CDb 1 3 Datums in this table are the average of three replications LT
7 4 53 LT LT LT LT LT Prasiola crispa Lightf Menegh. LT Jackson
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