摘要
用便携式ＡＤＣ光合气体分析系统和便携式ＣＦ－１０００荧光仪对青海和上海的同一植物和不同植物叶片光合作用的光抑制进行了测定。结果表明，两地在晴天强光下，中午植物叶片光系统Ⅱ（ＰＳⅡ）的光化学效率（Ｆｖ／Ｆｍ）和表观光合量子效率（ＡＱＹ）的日变化比早晨低；上海测定ＰＳⅡ的Ｆｖ／Ｆｍ和ＡＱＹ的日变化比青海的下降幅度大。ＡＱＹ的日变化曲线比ＰＳⅡ的Ｆｖ／Ｆｍ低，ＡＱＹ降低的幅度比ＰＳⅡ的Ｆｖ／Ｆｍ大。两地植物均有不同程度的光合作用光抑制。
The photoinhibition of photosynthesis of the same plant and the different plant leaves in Qinghai plateau and Shanghai plain were measured by using a portable ADC photosynthetic gas analysis system and a portable CF 1000 fluorometer.The results showed that the diurnal variation of apparent photosynthetic quantum efficiency (AQY) and the photochemical efficiency (Fv/Fm) of photosystem Ⅱ (PSⅡ) of the same plant or the different plant leaves in noon in Qinghai and Shanghai were lower than morning on bright days under strong light,the diurnal variation of AQY and Fv/Fm of PS Ⅱ measured the declining extent in Shanghai were bigger than Qinghai.The diurnal variation curve of AQY was lower than Fv/Fm of PSⅡ,descended extent of AQY was always bigger than Fv/Fm of PSⅡ.There were the photoinhibition of photosynthesis of the different degree in the two places plants,moreover Shanghai were bigger more than Qinghai.
出处
《西北植物学报》
CAS
CSCD
1999年第1期56-66,共11页
Acta Botanica Boreali-Occidentalia Sinica
基金
国家自然科学基金国家自然科学基金
关键词
AQY
PSⅡ
光合作用
植物叶片
光抑制
apparent photosynthetic quantum efficiency (AQY),photochemical efficiency (Fv/Fm) of photosystem Ⅱ (PSⅡ),photoinhibition of photosynthesis,diurnal variation
