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作用光关闭后玉米叶片叶绿素荧光短时上升的数学分析及其对照光持续时间的依赖

金明现, 米华玲, 叶济宇, 沈允钢

中科院上海植物生理研究所.上海 200032

摘要

经连续光照射以后,玉米活体叶片由光系统间电子传递链的非光化学还原引起的叶绿素荧光在暗中的短时上升可以用三重指数模型来逼近,从而为该荧光信号的定量分析提供了便利。当照光时间由30s逐渐增至270s时,叶绿素荧光在暗中上升的最大速率、最大高度以及峰的面积均呈现先升高而后缓缓下降的变化趋势,而荧光在升至最高峰后下降的最大速率则呈单调递减之势。荧光上升幅度随照光持续时间的变化趋势部分取决于光下积累的还原物质的动态。

关键词： 叶绿素荧光; 三指数函数模型; 玉米

Mathematical analysis of post-illumination transient increase in chlorophyll fluorescence and its dependence upon illumination duration in maize leaves

Jin Mingxian, Mi Hualing, Ye Jiyu, Shen Yungang

Shanghai Institute of Plant Physiology,Chinese Academy of Sciences.Shanghai 200032

Abstract

Post-illumination transient increase in chlorophyll fluorescence in intact maize leaves fitted well to a triple exponential model, showing the usefulness of the model as a mathematical framework for analysis. As illumination duration increased from 30 s to 270 s, the maximum ascending gradient, the height and the area of the post-illumination fluorescence peak went through an ascent and a subsequent gradual decline, while the maximal descending gradient after the peak showed a monotonicdecline. The change in magnitude of post-illumination fluorescence peak with increasing duration of illumination partially reflected the dynamics of the level of stromal reductants accumulated during illumination.

Key words: Chlorophyll fluorescence;Triple exponential model;Maize

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引用本文：

金明现, 米华玲, 叶济宇, 沈允钢. 作用光关闭后玉米叶片叶绿素荧光短时上升的数学分析及其对照光持续时间的依赖[J]. 生理学报 2000; 52 (3): .

Jin Mingxian, Mi Hualing, Ye Jiyu, Shen Yungang. Mathematical analysis of post-illumination transient increase in chlorophyll fluorescence and its dependence upon illumination duration in maize leaves. Acta Physiol Sin 2000; 52 (3): (in Chinese with English abstract).