棉花植株和花粉耐盐性的鉴定

本研究对８个耐盐性不同的棉花品种（系），利用水培的方法对其整体植株进行了耐盐性鉴定，利用液滴培养技术对其花粉的耐盐性进行了鉴定，并分析了棉花整体植株和花粉耐盐性的相关性，结果表明，在水培盐胁迫条件下，棉花叶片总面积和叶片鲜重减少的百分数是反映棉花整体植株耐盐性的指标。在液滴培养盐胁迫条件下，棉花花粉粒萌发的百分率是反映其耐盐性的可靠指标，而花粉管的长度不能反映棉花的耐盐性。棉花整体植株的耐盐性和花

Screening of Whole Plants and Pollen Grains of Cotton for Salt Tolerance

Whole plants and pollen grains of 8 cotton cultivars (G. hirsutum L. ) were screened for salt tolerance. The result indicated that the percentages of reduction of the total leaf areas and leaf fresh weights of whole plants raised in Hoagland solution modified by addition of 100 150 mmol/L NaCl could be used as good indexes of salt tolerance. The pollen germination percentages of the same 8 cultivars by sitting drop culture were also proved to be reliable indexes of salt tolerance, but pollen-tube growth were not. It was found that the whole plant salt tolerance and the pollen grain salt tolerance of cotton were highly significantly correlated with each other, indicating that salt tolerance of cotton is a trait that could be expressed in both the sporophyte and gametophyte. The advantages of pollen grain screening for salt tolerant cotton were also discussed.