| 摘要: |
| 在水分胁迫下大豆幼苗叶片相对水分含量(RWC)和光合速率下降,细胞质膜透性、脯氨酸(Pro)含量和气孔阻力均增大;缺钙与供钙植株相比,其RWC和光合速率更低,膜透性改变剧烈,特别是Pro增加2～3倍,缺钙处理下光合速率的进一步降低,可能由非气孔因素所致。实验结果表明钙对改善植物的水分状况、提高膜的稳定性和植株抗旱性具有重要作用。 |
| 关键词: 大豆,抗旱性,钙离子/水分胁迫 |
| DOI： |
| 分类号: |
| 基金项目:国家自然科学基金 |
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| The Effects of Calcium and Water Deficits on Some Physiological Processes of Soybean Seedlings |
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Yang Genping Shen Hongda Zhao Caixia Wang Shaotang
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| Abstract: |
| Under water stress, relative water content ( RWC ) and photo-synthetic rate decrease. Plasma membrance permeability, proline (Pro) content and stomatal diffusion resistance increase. RWC and photosynthetic rate in Ca-deficit treated seedlings were lower than those in Ca-rich seedlings. Membrance permeability changed greatly and pro increased 2～3 times as compared with that in Ca-rich seedlings. The free Pro accumulation was also found in Ca-deficit treated seedlings. Under water strees, the photosynthetic rate decreasing in Ca-deficit seedlings mainly depends on the non-stomatal factor. The experimental results suggested that Ca play an important role in improving water status, maintaining membrane stability and plant drought-resistance. |
| Key words: Glycine max, drought resistance, calcium ion/waterstress |
