英语翻译It is suggested that there is a limited capacity for pho

英语翻译
It is suggested that there is a limited capacity for photorespiration or the Mehler reaction(水中的电子经PSⅠ与PSⅡ传给Fd后再传给O2的电子传递途径) to act as significant alternative electron sinks under water stress in C4 photosynthesis.
This may explain why C4 photosynthesis is equally or even more sensitive to water stress than its C3 counterpart in spite of the greater capacity and water use efficiency of the C4 photosynthetic pathway
这表明在C4植物在水分胁迫条件下，光合作用过程中的光呼吸或梅勒反应对担当有效的可替电子吸收汇存在一个极限能力。这可能解释了尽管C4光和途径有更高的生产能力和水分利用能力，C4光合作用过程相比C3光合过程依然对水分胁迫同样甚至更加敏感。