棉 花 学 报 Cotton Science 2007，19(4)：315-317
Studies on Germination Characteristics of Different Salinity-resistant Cotton under Salt Stress Abstract：By the way of the vertically rolled paper tests，germination characteristics such as germination rate，seedling length，and seedling weight were studied with two genotypes of cotton CCRI 35 (salt tolerant) and Han 109 (salt sensitive) under the NaCl stress of the concentrations 0，0.1%，0.2%， 0.4%，0.6%，0.8%，1.0%，1.2%，1.4%，respectively. The results showed that the cotton germination rates were not affected under low concentrations（≤1.2%）but affected distinctly under high concentrations(≥ 1.2%). With the increase of NaCl concentrations，both of seedling length and seedling weight decreased significantly.The decrease range of Han 109(salt sensitive) was higher than CCRI 35 (salt tolerant). The seedling weight was negatively significant correlated with concentrations of NaCl. The seedling length was more sensitive to NaCl stress than the seedling weight.The cotton seedling length under the treatment of 0.8% NaCl stress should be ideally adopted to estimating salt-tolerance index in geminating stage，and the cotton seedling weight under the same level of stress should be optionally adopted to screening salt-tolerant index in geminating stage.
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