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首页> 外文期刊>Chinese science bulletin >Relation between photorespiration and photoinhibition in cotton leaves
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Relation between photorespiration and photoinhibition in cotton leaves

机译：棉花叶片光呼吸与光抑制的关系

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摘要

Photorespiration is a well-known CO_2-evolution process accompanying photosynthetic CO_2 uptake, whereas its physiological significance is still not well understood. As already reported, severe photoinhibition occurred in the leaves or chloroplasts exposed to strong light in the absence of CO_2 upon suppression of photorespiration, while photoinhibition could be prevented by the supply of CO_2 at a concentration near the compensation point. Based on these results, it has been suggested that photorespiration in C_3 plants can be effective in preventing photoinhibition under strong light with no or low CO_2, because it can dissipate excessive light energy. In the work presented here, we investigated whether, photorespiration could alleviate photoinhibition of photosynthesis in cotton leaves upon exposure to strong light in the presence of normal CO_2, and the possible mechanisms were discussed.
机译：光呼吸是伴随光合作用CO_2吸收的众所周知的CO_2进化过程，但其生理意义仍不为人所知。如已经报道的，在抑制光呼吸时，在没有CO_2的情况下，暴露于强光下的叶片或叶绿体中发生了严重的光抑制作用，而通过在补偿点附近提供浓度的CO_2可以防止光抑制作用。基于这些结果，已经表明C_3植物中的光呼吸可以有效地阻止在无CO 2或低CO 2的强光下的光抑制，因为它可以消散过多的光能。在本文介绍的工作中，我们研究了在正常CO_2存在下，光呼吸是否能减轻棉花叶片在强光下的光合作用的光抑制作用，并讨论了可能的机制。

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