高温胁迫下葡匐翦股颖耐热突变体“粤选1号”能量水平研究

研究草坪草匍匐翦股颖耐热突变体“粤选1号”在高温胁迫下光反应的能量供应对光合作用暗反应的影响，结果表明:高温胁迫导致亲本叶片的光合速率、光合放氧速率、叶绿体ATPase活性、叶片ATP和ADP含量及其能荷值迅速下降, 而“粤选1号”在整个高温胁迫中，保持着较高的光合速率、光合放氧速率和ATPase活性，维持着较高的ATP和ADP含量及能荷值.表明“粤选1号”耐热性获得可能与“粤选1号”具有更多的能量供应有关.

Relationship between Energy Levels and Photosynthesis of Agrostis stolonifera L."Yuexuan 1" under High Temperature Stress

In order to explore the effect of high temperature stress on energy supply and photosynthetic rate in the leaves of Agrostis stolonifera L. “Yuexuan 1” and its parents, the plants were treated by heat stress with 35/30℃ (day/night) for 0, 12, 24, 36, and 48h. After the experiments, the fully expanded leaves were collected and measured. The results showed that the contents of ATP, ADP, AMP and the value of energy charge were higher in the leaves of "Yuexuan 1" than its parents during the whole treatment process. The activities of RuBPcase and chloroplast ATPase, the photosynthetic rate and the oxygen-evolving rate were also higher than those of its parents during the high temperature stress treatment. It could be concluded that "Yuexuan 1” had better heat stress tolerance and kept higher rate of photosynthesis than its parents, which may result from lager amount of ATP supply from its leaves.