棉 花 学 报     Cotton Science   2008，20(5)：372-378

Study on Antioxidant Enzyme Activity and Chlorophyll Content in Naked-seedling Transplanting Cotton on Recovering Stage
CUI Ai-hua^1，2，MAO Shu-chun^2*，HAN Ying-chun²，LI Ya-bing²，FAN Zheng-yi²，WANG Guo-ping²，WANG Xiang-he²
(1.Jiangxi Agricultural University，Nanchang,Jiangxi 330045，China；2.Cotton Research Institute，Chinese Academy of Agricultural Sciences，Key Laboratory of Cotton Genetics Improvement，Ministry of Agriculture， Anyang，Henan 455000，China)

Abstract：The purpose of experiment was to study the antioxidant enzyme activity and chlorophyll contents in naked-seedling transplanting cotton on recovering stage. Three treatments were designed in single cropping field including directly sowed cotton，seedling raised with nutritive soil cube-and transplanted cotton, seedling raised with soilless-substrante and root-naked transplanted cotton. Two treatments including film-mulched, or no film-mulched were designed in double cropping system of wheat-cotton. SOD，POD and CAT activity, chlorophyll content in functional leaves were measured in 40 days after cotton was transplanted. The results showed that: transplanting cotton had distinct recovering stage because of the damaged roots during transplenting. During the recovering stage, SOD,POD and CAT activity,chlorophyll content in functional leaves were all going up at first, then descending or in a steady situation. CAT、POD were more sensitive to the negative environment than SOD, the activity went up quickly in the negative environment and went down quickly when the negative environment was relieved; film-mulched is beneficial to shorting the recovering stage and promoting the cotton seedling delivery early.
Key words：cotton; naked-seedling transplanting; recovering stage; anti-oxidant enzyme activity; chlorophyll            [Full Text, 2929KB]