| Effects of NaCl stress on seed germination, leaf gas exchange and seedling growth of Pteroceltis tatarinowii |
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| 基金项目： | Foundation project： This paper is supported by the National Natural Science Foundation of China （the grant number No.39970608）. |
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| 摘 要： |
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| 关 键 词： | 盐胁迫 Hoagland培养液 发芽率 净光合速率 成活率 生物量增量 |
| 文章编号： | 1007-662X（2006）03-0185-04 |
| 收稿时间： | 2006-02-28 |
| 修稿时间： | 2006-06-15 |
Effects of NaCl stress on seed germination, leaf gas exchange and seedling growth of Pteroceltis tatarinowii |
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| Authors: | Sheng-zuo Fang Li-yi Song Xiang-xiang Fu |
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| Institution: | (1) College of Forest Resources and Environment, Nanjing Forestry University, Nanjing, 210037, P. R. China |
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| Abstract: | Effects of NaCl on seed germination, leaf gas exchange and seedling growth were investigated. The germination of P. tatarinowii seeds was delayed in the presence of NaCl, and was significantly inhibited when NaCl concentration exceeded 17 mM (1.0 g·L−1). NaCl treatments induced reductions of transpiration rate, stomatal conductance and net photosynthetic rate and their reductions
were significant with the increasing of NaCl concentration. However, intercellular CO2 concentration in seedling leaves under salt stress was significantly higher than that of controls. There was a significant
reduction in survival, basal diameter increment and height increment with increasing NaCl concentration 50 days after NaCl
treatment, and a significant reduction in the dry weight increment of roots, stems, and leaves was also observed in the NaCl
treatments. The deleterious effect on the biomass increment was more evident in the case of stems and leaves. Results from
this study suggest that P. tatarinowii is sensitive to salinity stress and the salinity threshold for seedling growth might be less 34 mM (2.0 g·L−1).
Biography: FANG Sheng-zuo (1963–), male, Professor, College of Forest Resources and Environment, Nanjing Forestry University, Nanjing
210037, P. R. China. |
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| Keywords: | Salt stress Hoagland nutrient solution Germination rat Net photosynthetic rate Survival Biomass increment |
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