干旱胁迫对不同基因型水稻光合特性的影响

Effect of drought stress on chlorophyⅡ fluorescence induction kinetics in leaves of different rice genotypes

通过营养液水培和5%PEG(聚乙二醇)模拟干旱效应的方法,应用PFM-102植物动力学荧光仪,测定了干旱胁迫下不同基因型水稻荧光诱导动力学参数变化。研究表明,干旱胁迫下荧光诱导动力学参数F0,Fv/F0,Fv/Fm,和T1/2均下降,不同基因型品种荧光诱导动力学参数对干旱胁迫的反应程度不同;各荧光诱导动力学参数之间具有显著的相关性。认为,水稻的叶片荧光诱导动力学光合特性对干旱胁迫有着适应性反应。

The effects of drought stress on the chlorophyll fluorescence induction kinetics of rice varieties were studied by using PFM102 chlorophyll fluorometer. The results showed that chlorophyll fluorescence parameters including F0, Fv/F0, Fv/Fm, and T1/2 decreased in response to drought stress; there were obvious differences on change of chlorophyll fluorescence parameters among different genotypes; the chlorophyll fluorescence parameters were closely related each other. It was concluded that the change of photosynthetic the characteristics, i.e. the chlorophyll fluorescence parameters of F0, Fv/F0, Fv/Fm and T1/2, was the adaptation effect of rice to drought stress. 