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不同生育时期玉米苞叶叶绿素荧光特性差异分析

DOI: 10.7668/hbnxb.2009.06.015, PP. 74-77

Keywords: 玉米,苞叶,叶绿素含量,叶绿素荧光

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Abstract:

以郑单958和农大36两个玉米品种为研究材料,对大田条件下不同生育时期玉米苞叶的叶绿素含量和叶绿素荧光动力学进行了比较分析.结果表明,不同生育时期玉米苞叶叶绿素含量呈先升后降的变化趋势,并在灌浆期达到最高值,且农大36苞叶的叶绿素降低速率要低于郑单958,这样有利于其保持更为持久的光合能力.不同生育时期玉米品种间苞叶叶绿素荧光参数(Fm、Fv、Fv/Fm、Fv/Fo等)的变化规律基本一致,郑单958高于农大36,说明郑单958苞叶反应中心活性较高,具有较高的电子传递速率,并且苞叶叶片开放的PSⅡ反应中心捕获激发能的效率高于后者.

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