摘要
棉花主茎叶片的超氧物歧化酶(SOD)、过氧化物酶(POD)活性、叶绿素含量及净光合速率等因叶龄不同而变化。主茎下部衰老叶片的SOD、POD活性明显降低、叶绿素含量减少、光合作用功能衰退。同时,棉株受到病害胁迫时,叶片的SOD活性也会明显下降,但是,POD活性则上升。当发病植株恢复正常生长后,棉花叶片的SOD、POD活性仍能恢复正常。
The activity of superoxide dismutase (SOD) and peroxidase (POD), contents of chlorophyll and net photosynthetic rate varied with the age of leaves in cotton stem. SOD and POD activity descended apparently, and chlorophyll contents and photosynthesis declined in senescent leaves of lower stem. While cotton plants were stressed by disease, SOD activity of leaves decreased obviously, but the activity of POD increased. After the diseased plants recovered, the activity of SOD and POD in cotton leaves returned to normal levels again.
出处
《棉花学报》
CSCD
北大核心
1992年第1期57-60,共4页
Cotton Science
关键词
棉花
叶片
衰老
病害胁迫
cotton leaf
senescence
disease stress
superoxide dismutase
peroxidase
net photosynthetic rate
