Abstract

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Title:: Effect of Simulated Drought Stress on Photosynthesis Related Indexes at Seedling Stage of Wild Soybeans

Author(s):: XU Yan-ping1; 2; HU Cui-mei2; ZHANG Wen-hui2; LIU Li-ke2; ZHAO Ren-gui1; (1.College of Agronomy,Jilin Agricultural University,Changchun 130118,China;2.School of Life Science,Liaocheng University,Liaocheng 252059,China)

Keywords:: Wild soybean; Drought tolerance; Anthocyanin; Carotenoid; Relative water content; Fv/Fm

Abstract:: Six wild soybeans were collected from Shandong province including Y1(ZYD03245,from Linqu county),Y2(ZYD03269,from Wudi county),Y3(from Kenli county),Y4(from Yanggu county),Y5(from Guangrao county)and Y6(from Dongchangfu district).In order to investigate the drought tolerance of these wild soybeans,simulated drought treatment was carried out with PEG6000 at 5% and 10% concentration at seedling stage.Five physiological indexes including anthocyanin content,chlorophyll content,carotenoid content,relative water content and chlorophyll fluorescence parameters were determined to assess the drought tolerance of the 6 wild soybeans.The results showed that:(1)as the simulated drought stress increased,anthocyanin content,chlorophyll content and carotenoid content increased in all wild soybeans except Y1;(2)relative water content and chlorophyll fluorescence of all wild soybeans increased as simulated drought stress increased.From the point of view of the anthocyanin content and carotenoid content,the order of drought tolerance of the 6 wild soybeans were Y4>Y6>Y2>Y5>Y3>Y1.On the other hand,based on relative water content and chlorophyll fluorescence,the orders of drought tolerance were Y4>Y6>Y5>Y1>Y3>Y2 and Y4>Y5>Y6>Y3>Y2>Y1,respectively.Considering all the physiological indexes together,it could be concluded that drought tolerance of Y4 and Y6 were the highest,that of Y2,Y3 and Y5 were middle and that of Y1 was the lowest.