盐碱胁迫对燕麦光合特性的影响

The Effects of Saline-alkali Stress on Photosynthetic Charateristics in Oats

利用人工模拟光源研究了盐碱胁迫下燕麦叶片的光合特性。结果表明,轻度盐碱胁迫促进了燕麦叶片光合速率(Pn)的提高,随着盐碱浓度的进一步增强光合速率较对照降低,盐碱胁迫降低了燕麦叶片的胞间二氧化碳浓度(Ci)和蒸腾速率(Tr),重度盐碱胁迫下燕麦的水分利用率(WUE)增加。

Photosynthetic characteristics in oats leaves were measured under Saline-alkali stress in use of the simulated photosynthetic radiation （SPR）. The results showed that photosynthetic rate （Pn） increased under slight saline-alkali stress, and with the increase of salt concentration, photosynthetic rate （Pn） decreased. The inter-cellular CO2 concentrations （Ci） and the transpiration rate （Tr） decreased with the increase of salt concentration. Water use efficiency （WUE） under serious saline-alkali stress increased.