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首页> 外文会议>NATO Advanced Research Workshop on The Chloroplast: From Molecular Biology to Biotechnology Kolymbari-Chania, Crete, Greece 10-15 August 1998 >Chlorophyll fluorescence kinetic depends on age of leaves and plants
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Chlorophyll fluorescence kinetic depends on age of leaves and plants

机译：叶绿素荧光动力学取决于叶片和植物的年龄

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摘要

Recently, parameters of chlorophyll (Chl) fluorescence induction kinetics have often been used as characteristics of stress effect on plant photosynthesis. In these determinations, age of tested leaves and plants is only exceptionally taken into account. Nevertheless, photosynthetic activities markedly change during life span of leaves and plants, they even vary at individual places of the leaf blade that differ in relative age of cells and chloroplasts. These changes are reflected in Chl fluorescence kinetic, and the ontogenic differences in its parameters may be larger than those induced by stress. Comparison of values from the literature has shown that relatively independent of leaf age is the often used ratio of variable and maximum fluorescence F_v/F_m: it rapidly declines only at leaf senescence, when its value is related to the Chl content in leaves.
机译：最近，叶绿素（Chl）荧光诱导动力学的参数经常被用作对植物光合作用的胁迫效应的特征。在这些确定中，仅例外地考虑了被测叶片和植物的年龄。然而，光合作用活动在叶片和植物的生命周期中发生显着变化，甚至在叶片的各个位置发生变化，这些位置在细胞和叶绿体的相对年龄方面有所不同。这些变化反映在Chl荧光动力学中，并且其参数上的个体差异可能大于由压力诱导的差异。来自文献的值比较表明，相对于叶龄相对独立的是可变和最大荧光F_v / F_m的常用比率：当其值与叶片中Chl含量有关时，它仅在叶片衰老时迅速下降。

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