摘要
本试验对田间生长的鲁白 8号大白菜 (BrassicacampestrisL ssp pekinensis (Lour)Olsson)光合作用的光合效率及其日变化进行了研究。结果表明 ,在大白菜幼苗期和结球初期 ,叶片的光合速率 (Pn)、光合效率(AQY)、光系统Ⅱ的光化学效率 (Fv/Fm)中午后明显降低 ,这表明大白菜各生长时期都存在光合作用的光抑制现象 ,苗期因光照强、温度高 。
In seedling stage and early heading stage,diurnal variation of photosythtetic efficiency and photoinhibition of photosynthesis in Chinese cabbage leaves was investigated with Lubai No 8 〔 Brassica campestris L ssp. Pekinensis (Lour) Olsson〕 under field conditions The results showed that reductions in Pn、Fv/Fm and AQY during midday high light stress were obvious This showed that there was a phenomenon of photoinhibition in photosynthesis of Chinese cabbage,because light intensity and temperatune was higher,and that the level of photoinhibition in seedling stage was larger than that in early heading stage
出处
《山东农业大学学报（自然科学版）》
CSCD
2000年第3期249-252,共4页
Journal of Shandong Agricultural University：Natural Science Edition
关键词
大白菜
光合效率
日变化
田间生长
光合作用
幼苗期
光抑制
初期
午后
研究
Chinese cabbage
photoinhibition
apparent quantum yield(AQY)
Photochemical efficiency of PS Ⅱ (Fv/Fm of PS Ⅱ)
