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棉花萌发期和苗期耐盐性评价及耐盐指标筛选
作者姓名:Zhang GW  Lu HL  Zhang L  Chen BL  Zhou ZG
作者单位:南京农业大学农业部南方作物生理生态重点开放实验室,南京,210095
基金项目:国家高技术研究发展计划项目(2007AA10Z206)资助
摘    要:于2010年在江苏南京农业大学人工气候室内进行砂培试验,采用不同浓度的NaCl水溶液模拟盐胁迫,以多项指标盐害系数隶属函数值和总隶属函数值为依据,比较了13个棉花品种萌发期和苗期的耐盐性,并进行聚类分析.结果表明:150mmol·L-1NaCl是进行棉花耐盐性鉴定的适宜盐浓度.棉花的耐盐性在生育期和品种间表现不同:中棉所44和中棉所177是在萌发期和苗期均表现稳定的耐盐品种,表现稳定但不耐盐品种有中棉所102、苏棉12号和泗棉3号,表现稳定且中等耐盐品种有中棉所103、德夏棉1号和美棉33B;发芽率、发芽势、发芽指数、活力指数和鲜质量的盐害系数可以作为棉花萌发期耐盐鉴定指标,株高、叶片伸展速率、地上部干质量、根系干质量、根系活力和净光合速率的盐害系数可以作为棉花苗期耐盐鉴定指标.

关 键 词:棉花  萌发期  苗期  耐盐性  耐盐指标  隶属函数值  

Salt tolerance evaluation of cotton (Gossypium hirsutum) at its germinating and seedling stages and selection of related indices
Zhang GW,Lu HL,Zhang L,Chen BL,Zhou ZG.Salt tolerance evaluation of cotton (Gossypium hirsutum) at its germinating and seedling stages and selection of related indices[J].Chinese Journal of Applied Ecology,2011,22(8):2045-2053.
Authors:Zhang Guo-wei  Lu Hai-ling  Zhang Lei  Chen Bing-lin  Zhou Zhi-guo
Institution:ZHANG Guo-wei,LU Hai-ling,ZHANG Lei,CHEN Bing-lin,ZHOU Zhi-guo (Ministry of Agriculture Key Laboratory of Crop Physiology and Ecology in Southern China,Nanjing Agricultural University,Nanjing 210095,China).
Abstract:A sand culture experiment was conducted to study the salt tolerance of 13 cotton cultivars at their germinating and seedling stages under the stress of different concentration NaCl, and a cluster analysis was made on the salt tolerance, according to the subjection values of salt toxicity coefficients of multi-indices and the sum subjection value. It was observed that the appropriate concentration of NaCl for the evaluation of salt tolerance was 150 mmol x L(-1). The salt tolerance differed with cultivar and growth stage. Among the 13 cultivars, the CCRI-44 and CCRI-177 were steadily salt-tolerant at both germinating and seedling stages, the CCRI-103, Dexiamian 1, and NuCOTN 33B were steadily and moderately salt-tolerant, while the CCRI-102, Sumian 12, and Simian 3 were steadily salt-sensitive. Germination rate, germination potential, germination index, vigor index, and fresh mass could be served as the indicators to evaluate the salt tolerance of the cultivars at germinating stage, while plant height, leaf expansion rate, shoot dry mass, root dry mass, root vigor, and net photosynthetic rate could be applied to assess the salt tolerance at seedling stage.
Keywords:cotton (Gossypium hirsutum)  germinating stage  seedling stage  salt tolerance  salt tolerance index  subjection value    
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