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银杏叶片光合作用对强光的响应

李新国, 许大全, 孟庆伟

山东农业大学植物生理生化研究室.山东,泰安 271018；中科院上海植物生理研究所.上海 200032

摘要

银杏叶片遭受光量子通量密度(PFD)为1 200#mu#mol m~(-2)s~(_1)的强光胁迫后,净光合速率(Pn)、气孔导度(Gs)、细胞间隙CO_(2)浓度(Ci)、PSII光化学效率(Fv/Fm)和表现量子效率(AQY)都下降,而叶片在505nm处的光吸收(A_(505))、初始荧光水平(Fo)和荧光的非光化学猝灭(qN)上升。在去除强光胁迫数小时之后,这些参数都不能完全恢复。

关键词： 强光胁迫; 净光合速率; 气孔导度; 光抑制; 叶黄素循环; 银杏

Response of photosynthesis to strong light in Ginkgo biloba L. leaves

Li Xinguo, Xu Daquan, Meng Qingwei

Plant Physiology & Biochemistry Laboratory,Shandong Agricultural University.Tai^an 271018,Shandong；China

Abstract

For understanding the photosynthetic characteristics of Ginkgo biloba L., the authors observed the response of photosynthesis to strong light in leaves of ginkgo grown under field conditions by using a portable photosynthetic measurement system (CI-301), a table ADC-225-MK3 CO_(2) gas analyzer and a portable fluorescence measurement system (PAM-2000).

Key words: Strong ligh stress;Net photosynthetic rate;Stomatal conductance; Photoinhibition;The xanthophyllcycle;Ginkgo biloba

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引用本文：

李新国, 许大全, 孟庆伟. 银杏叶片光合作用对强光的响应[J]. 生理学报 1998; 50 (4): .

Li Xinguo, Xu Daquan, Meng Qingwei. Response of photosynthesis to strong light in Ginkgo biloba L. leaves. Acta Physiol Sin 1998; 50 (4): (in Chinese with English abstract).