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Effect of soil drought stress on photosynthetic rate and carbonic anhydrase activity of rice leaf

Dai Xinbin, Zhai Huqu, Zhang Hongsheng, Zhang Rongxian

Agronomy Department,Nanjing Agricultural University.Nanjing 210095,Jiangsu

Abstract

The results showed that Shanyou 63 had more stable photosynthesis than NAU303. After drought treatment, its photosynthetic rate declined only by 33%, while that of NAU303 declined by 76%. The lower sensibility of the former^s photosynthetic rate can be explained by its larger increase in carbonic anhydrase activity under drought stress. This kind of adaptability to soil drought appeared only during the reversible decline phase of leaf photosynthetic function.

Key words: Photosynthesis;Carbonic anhydrase;Drought stress;Adaptation;Rice

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Citing This Article：

Dai Xinbin, Zhai Huqu, Zhang Hongsheng, Zhang Rongxian. Effect of soil drought stress on photosynthetic rate and carbonic anhydrase activity of rice leaf. Acta Physiol Sin 2000; 52 (2): (in Chinese with English abstract).