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Effects of CO2 enrichment on chlorophyll fluorescence and antioxidative enzymes in loquat(Eriobotrya japonica Lindl.)under the condition of water-stress
Author(s): 
Pages: 63-67
Year: Issue:  2
Journal: ACTA AGRICULTURAE ZHEJIANGENSIS

Keyword:  CO2加富水分胁迫枇杷叶绿素荧光抗氧化酶;
Abstract: 在CO2分别为低浓度(400 μmol*mol-1,近似大气的浓度)和高浓度(700 μmol*mol-1)下的两个自制开顶式生长室内,研究水分胁迫对2年生大红袍枇杷(Eriobotrya japonica Lindl.)叶片的叶绿素荧光及抗氧化酶活性的变化.结果表明,高CO2浓度对枇杷叶片荧光参数Fv/Fm和Fv/Fo值及ΦPSⅡ明显提高;而在水分胁迫条件,高CO2浓度下枇杷叶片荧光参数Fv/Fm和Fv/Fo值及ΦPSⅡ下降幅度明显减少;无水分胁迫时高CO2浓度也使SOD、POD和CAT酶活性显著提高.但在水分胁迫时,高CO2浓度下的SOD、POD和CAT酶活性上升幅度明显较小,膜脂过氧化水平的上升幅度也较小,表明CO2浓度升高对水分胁迫造成的氧化损伤有一定的缓解作用.
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