美丽异木棉光合相关酶活性季节性变化  

Seasonal Variation of GO and RuBPC Carboxylase Activities in Chorisia speciosa

作　　者：吴吉林[1,2] 李永华[3] 叶庆生[2] 唐克华[1] 

机构地区：[1]吉首大学城乡资源与规划学院,湖南张家界427000 [2]华南师范大学生命科学学院,广东广州510631 [3]河南农业大学林学园艺学院,河南郑州450002

出　　处：《亚热带植物科学》2008年第4期12-14,21,共4页Subtropical Plant Science

基　　金：广东省自然科学基金团队项目(003062);广东省重点科技攻关项目(2002C20120);广东省自然科学基金重点项目(04105806)

摘　　要：对美丽异木棉叶片叶绿素含量与乙醇酸氧化酶(GO)、核酮糖二磷酸羧化酶(RuBPCase)活性的季节变化进行测定。结果表明:叶片Chla、Chlb和Chl(a+b)含量的峰值均出现在7月;叶片GO活性季节变化为单峰型曲线,8月最高(252nmol/mg·min);RuBPCase活性季节变化为双峰曲线,6月和9月各有一峰值,分别为275nmol/mg·min和248nmol/mg·min,8月出现低谷;叶绿素含量和酶活性受光合有效辐射(PAR)与气温(Tair)的影响较大。Seasonal variations of chlorophyll, the activities of glycolate oxidase （GO） and RuBPC carboxylase （RuBPCase） in Chorisia speciosa leaves were studied. The results were as follows. The concentrations of Chla, Chlb and Chl（a＋b） changed from May to December, and reached their high peak on July; Seasonal variation in the activity of RuBPcase was a bimodal curve and had two peaks in June and September, the peaks were about 275 nmol/mg-min and 248nmol/mg.min, respectively, and there was a low valley in August; Seasonal variation in the activity of GO was different to RuBPcase, its peak came in August and reached about 252nmol/mg.min. Seasonal variations of PAR and Tair were important to chlorophyll and the activity of GO, and had a significantly relationship with them.

关 键 词：美丽异木棉 叶绿素 乙醇酸氧化酶 核酮糖二磷酸羧化酶 季节变化 

分 类 号：S685[农业科学—观赏园艺] Q945.11[农业科学—园艺学]