摘要
经ABA处理的水稻幼苗叶片和对照相比 ,PSII光化学效率 (Fv/Fm)和非光化学猝灭系数 (qN)显著受抑制。经高光处理 1h后 ,ABA处理的水稻幼苗叶片光抑制程度比对照小 ,这暗示ABA对高光光抑制具有一定的光保护作用 ,且间接表明ABA提高水稻幼苗抗光抑制的能力与叶黄素循环密切相关。
Photoinhibition was studied in leaves of abscisic acid(ABA)-treated rice seedlings. ABA inhibited the photosynthetic process by lower PSII photochemistry efficiency(Fv/Fm)and coefficient for non-photochemical quenching(qN). After photoinhibition under light intensity of 2 000 μmolm -2s -1 for 1 h,the extent of photoinhibition was smaller in ABA-treated rice leaves than in the control. It is suggested that ABA had a protective effect on the high light induced photoinhibition. And the results also indicated photoprotection capacity of the rice seedlings against high light photoinhibition was closely associated with xanthophyll cycle.
出处
《广西植物》
CAS
CSCD
北大核心
2002年第6期534-536,共3页
Guihaia
基金
国家重点基础研究规划项目 (G19980 10 10 0 )
中国科学院研究生科学与社会实践专项资助。
