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Studies on Differences of genotypes in Drought Resistant and Their Mechanism of Physiology and Biochemistry in Ramie

Jie Yucheng; Xiaoaiping; Huangpisheng;Lizhongdao;Yanli, Wanghongying(Institute of Bast Fibre Crpos,CAAS, Yuanjiang, 413100)(Nanjing Agricutural University, Nanjing, 210095)(Hunan Agricutural University,Changsha. 410125)  
There were highly significant differences in drought resistance in dexes of ramie genotypes having same root-types. Relative water content (RWC),water potential and cell membrane stability were high for drought resistant ramie genotypes under drought stress. With the increase of stress, Peroxidase activity in drought - resistant genotypes trended from high to low, but that in drought-sensitive ones changed contrily, The proline levels in drought - sensitive genotypes showed higher than that in drought - resistant ones under lighter drought stress (0 - 12 days o drought stress ).The proline accumulation in drought - resistant genotypes showed a faster rate as compared with that in drought sensitive ones under more serious drought stress (12 - 24days of drought stress ). This is probably a postive responese pattern by free - proline accumulation for ramie to stresses.
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