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《Chinese Journal of Grassland》 2012-02
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Studies on Chlorophyll Fluorescence Characters and Leaf Water Potential in Nine Alfalfa Varieties

LI Chao1,2,WANG Yu-qing2,GAO Li2,YAN Zhi-jian2(1.Graduate School of Chinese Academy of Agricultural Science,Beijing 100081,China; 2.Grassland Research Institute,Chinese Academy of Agricultural Science/Key Laboratory of Grassland Resources & Ecology,Ministry of Agriculture,Hohhot 010010,China)  
The chlorophyll fluorescence characters,leaf water potential and diurnal fluctuations in nine varieties of alfalfa under dry farming were observed.The results showed that the diurnal fluctuations of the chlorophyll fluorescence parameters of nine varieties of alfalfa were nearly in the same trends,peak values appeared at noon.The differences in all the characters such as Fm,Fv,Fv/Fo,Fv/Fm and RC/ABS were extremely significant(P0.01) and the nine varieties of alfalfa can be classified into two groups based on these chlorophyll fluorescence characters,one group including Zhungeer,Caoyuan No.2,Zhongmu No.1,Aohan and Longmu No.801,which were better in chlorophyll fluorescence characters,the other group including Zhaodong,Gannong No.3,Gongnong No.1 and Longmu No.803,which were poorer in chlorophyll fluorescence characters.And there were great diurnal fluctuations in leaf water potential among nine varieties of alfalfa,the leaf water potential of Zhungeer and Aohan was higher and more stable than the other varieties,especially Gongnong No.1 and Zhaodong.In conclusion,the varieties including Zhungeer,Caoyuan No.2,Zhongmu No.1,Aohan and Longmu No.801 were better in resistibility than the other varieties including Zhaodong,Gannong No.3,Gongnong No.1 and Longmu No.803.
【Fund】: 中央级公益性科研院所基本科研业务费专项资助项目(1610332011001);; 国家牧草产业技术体系鄂尔多斯综合试验站
【CateGory Index】: S541.9
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