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不同钙素水平对厚皮甜瓜叶片光合作用和保护酶活性的影响
龙明华;唐小付;于文进;廖易;黄文浩;秦荣耀
1.广西大学农学院;2.广西大学农学院 广西南宁530005;3.广西南宁530005
摘要:
采用深液流无土栽培方式,研究不同钙素水平对厚皮甜瓜叶片光合作用和保护酶活性的影响。结果表明,在缺钙、低钙、高钙胁迫下,厚皮甜瓜叶片中的叶绿素和类胡萝卜素含量明显下降,叶绿素a/叶绿素b比值升高;同时叶片中的超氧化物歧化酶(SOD)、过氧化物酶(POD)、过氧化氢酶(CAT)的活性及丙二醛(MAD)含量、相对电导率、可溶性蛋白质含量都明显高于正常供钙的植株。缺钙胁迫下,基础荧光(Fo)下降,低钙和高钙胁迫下Fo 升高,但缺钙、低钙、高钙胁迫下叶片叶绿素荧光参数Fv/Fm、Fv/Fo、Fm、Yield和ETR都明显下降。缺钙胁迫下叶片净光合速率(Pn)、气孔导度(Gs)下降,胞间 CO2 浓度(C...
关键词:  钙    厚皮甜瓜    光合作用    保护酶活性    叶绿素荧光
DOI:
分类号:
Fund project:广西大学科研基金项目(合同号:99304)
Abstract:
Key words:  
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