To study the effects of drought stress on the growth and photosynthetic fluorescence characteris-tics of Grossularia atropurpure,the dynamic changes of growth indexes,light and parameters and chlorophyll fluorescence parameters were detected by PEG-6000 simulated drought stress test with different concentra-tions(10％,20％and 30％).The results showed that with the increase of PEG-6000 concentration and stress days,the plant height,ground diameter,relative chlorophyll and leaf number of G.atropurpure seedlings decreased.Fluorescence parameters Pn,Sn and Gs showed a downward trend,while intercellular Ci showed an upward trend.The five indicators of light and parameters,Fv,qP,Fv/Fm,Fv/F0 and Y(Ⅱ).all showed a downward trend,while qNP and F0 showed a gradual upward trend.Therefore,G.atropurpure mainly responds to drought stress by changing its growth status,photosynthetic and fluorescence characteristics in the environ-ment of increasing drought.
关键词
五裂茶藨子/干旱胁迫/生长指标/荧光参数/光和参数
Key words
Grossularia atropurpure/Drought stress/Growth indicators/Fluorescence parameters/Light and parameters
维普
万方数据