Study on physiological and biochemical indexes of genotypic differences of ramie in drought tolerance

Relative water content(RWC),cellmembrane stability and ability of resistance to wilting were high for drought resistant ramie genotypes under drought stress. With the increase of stress, Peroxidase activity in drought resistant genotypes changed from low to high whereas that in drought sensitive ones changed in the opposite direction. The proline content of drought-sensitive genotypes was higher than that of drought resistant ones under lower drought stress. The proline accumula tion in drought resistant genotypes was faster as comparedwith that in drought sensitive ones under more serious drought stress.