| Response of Populus x canescens （Populus tremula x alba） to high concentration of NaCl stress |
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| 引用本文： | GAO Jian PENG Zhen-hua. Response of Populus x canescens （Populus tremula x alba） to high concentration of NaCl stress[J]. 林业研究, 2006, 17(4): 269-272. DOI: 10.1007/s11676-006-0061-x |
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| 作者姓名： | GAO Jian PENG Zhen-hua |
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| 作者单位： | GAO Jian 1，PENG Zhen-hua1，2* 1 International Centre for Bamboo and Rattan，Key Laboratory for Science and Technology in Bamboo and Rattan of State Forestry Administration，Beijing 100102，P. R. China 2 Research Forestry Institute，Chinese Academy of Forestry，Beijing 100093，P. R. China |
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| 基金项目： | 国家重点基础研究发展计划(973计划) |
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| 摘 要： | Introduction Salinity is a major factor in inhibiting plant growth and decreasing forest productivity. Up to 1997, the total area affected by salinity in the world had amounted to 930 million hm2 (FAO), and is still increasing. A global study of land use …
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| 关 键 词： | 高浓度盐逆境 拟南芥 应激反应 生长 光合作用 |
| 文章编号： | 1007-662X（2006）04-0269-04 |
| 收稿时间： | 2006-04-11 |
| 修稿时间： | 2006-06-20 |
Response of Populus × canescens (Populus tremula × alba) to high concentration of NaCl stress |
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| Jian Gao,Zhen-hua Peng. Response of Populus × canescens (Populus tremula × alba) to high concentration of NaCl stress[J]. Journal of Forestry Research, 2006, 17(4): 269-272. DOI: 10.1007/s11676-006-0061-x |
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| Authors: | Jian Gao Zhen-hua Peng |
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| Affiliation: | (1) Key Laboratory for Science and Technology in Bamboo and Rattan of State Forestry Administration, International Centre for Bamboo and Rattan, Beijing, 100102, P. R. China;(2) Research Forestry Institute, Chinese Academy of Forestry, Beijing, 100093, P. R. China |
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| Abstract: | Populus x canescens was cultivated on solid substrate and treated by salt (150 mM NaCl). The growth parametersincluding new leaf formation, height increment, diameter at the base increment, fresh and dry mass of leaf, stem, coarse root, and fine root were determined. The nutrient elements in leaves of samples under salt stress and the control, and the chlorophyll fluorescence of plants separated dark and light, initial fluorescence (Fo), and maximum fluorescence (Fm) were measured. Results showed that 150 mM NaCl treatment resulted in growth reduction of Populus x canescens. Nutrient element contents in the foliage of plants under salt stress were different from that of control. The foliar N-concentrations of plants under salt stress were not affected. Contents of Na under salt stress were 120 times as much as that under control. However, contents of S, K, P, Ca, Mg, Fe, Mn under salt stress were less than that under control. Salt stress caused damage in the PSII reaction centers, i.e. photo-inhibition couldn't be repaired under dark situation. The yield of chlorophyll fluorescence showed that several parameters associated with PSII functions, e.g. Fv/Fo, Fv/Fm were not influenced at the first stage of salt stress treatment. However, after a period of time, PSII functions were significantly inhibited, which led to the decrease of carbon assimilation. These results suggest that salt stress (150 mM NaCl) did not affect photosynthetic chlorophyll fluorescence of Populus x canescens immediately. After four day of salt stress, PSII reaction centres were seriously damaged during photo-inhibition. |
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| Keywords: | Growth analysis Salt stress Photosynthesis Chlorophyll fluorescence yield Nutrient elements Populus x canescens |
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