水分胁迫抑制水稻光合作用的机理  

The Mechanism for the Inhibition of Photosynthesis in Rice by Water Stress

作　　者：卢从明[1] 张其德[1] 匡廷云[1] 王忠[2] 高煜珠[2] 

机构地区：[1]中国科学院植物研究所,北京100044 [2]江苏农学院,江苏扬州225001

出　　处：《作物学报》1994年第5期601-606,共6页Acta Agronomica Sinica

摘　　要：水分胁迫降低了水稻的光合速率.轻度水分胁迫下,气孔的限制是光合速率下降的主要原因;而严重水分胁迫下,叶肉细胞光合能力的降低是光合速率下降的主要原因.叶肉细胞光合能力的降低可能是由于光合量子效率、羧化效率、光合电子传递速率及光合磷酸化活力的下降所致.The mechanism for the inhibition of photosynthesis in rice by water stress was studied. Under mild water stress, the decline of photosynthesis was mainly due to the decline of stomatal conductance. However under severe water stress, the principal cause of the reduction in photosynthesis was attributed to the decline of photosynthetic capacity of mesophyll cells. Severe water stress inhibited photosynthetic quantum yield, carboxylation efficiency, electron transport rate, and photophosphorylation activity.

关 键 词：水分胁迫 水稻 光合作用 

分 类 号：S511.101[农业科学—作物学]