The Relationship between Cell Protoplast Characteristics and Drought Resistance in Wheat Seedling

doi:10.3321/j.issn:1000-7091.1989.z1.016

Abstract

Abstract: As drought stressed worsely, the osmoti'c ground value(Og), permeability of protoplast layer to nonelectrolytes (methylurea)(Ks) and protoplasm viscosity increased in both of the first and the second sheath cells of different drought resistant wheat ecotypes. No matter whether water content was normal or deficient the drought resistant variety, Changle No. 5 was significantly different from drought sensitive variety Yangmai No. 4. When plant stressed to some extent the Og and Ks of drought sensitive Yangmai No. 4 reduced early and rapidly, even plasmalemma membrane broke down. Among the three indexes the Ks was most sensitive to drought stress, which indicated that wheat drought resistance was closely correlated to protoplast layer permeability.

Key words: Wheat, Water stress, Cell osmotic ground value, Protoplast layer permeability, Protoplasm viscosity

Jia Yinsuo, Cui Siping, Lee-Stadelmann O. Y.. The Relationship between Cell Protoplast Characteristics and Drought Resistance in Wheat Seedling[J]. ACTA AGRICULTURAE BOREALI-SINICA, 1989, 4(S1): 92-96. doi: 10.3321/j.issn:1000-7091.1989.z1.016.

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