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作 者 ：董志刚,程智慧*

期 刊 ：生态学报 2009年 29卷 3期 页码：1348~1355

关键词：番茄；品种；芽苗期；幼苗期；耐盐性；耐盐指标；评价；

Keywords:tomato, varieties, sprout stage, seedling stage, salt tolerance, salt tolerance indices, assessment,

摘 要 ：对芽苗期和幼苗期番茄耐盐鉴定指标进行检验,明确番茄芽苗期和幼苗期耐盐性的相关性,筛选耐盐的番茄品种资源，以便为耐盐育种和栽培提供材料和方法。试验采用不同浓度的NaCl水溶液人工模拟盐胁迫,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20个番茄品种资源芽苗期和幼苗期的耐盐性及两个时期耐盐性的相关性,并利用单一指标盐害系数隶属函数值和总隶属函数值进行了聚类分类。结果表明：芽苗期和幼苗期番茄耐盐性有所不同,耐盐和中等耐盐材料相同率为53.85%。进行番茄耐盐性筛选时可以把发芽势、发芽率、发芽指数、萌发活力指数、下胚轴长、地上鲜重作为芽苗期耐盐鉴定指标,把地上部鲜重、根鲜重、地上部干重、根干重、壮苗指数、根/冠比作为幼苗期耐盐鉴定指标。

Abstract:Through this experiment, we determined indices which can assess salt tolerance of tomato varieties in sprout stage and seedling stage, defined the correlation between salt tolerance of tomato varieties in sprout stage and that in seedling stage, and select some varieties which are obviously salt tolerant so that they can be used as resources for breeding and cultivation of salt tolerant tomatoes. By artificial simulated salt stress with NaCl aqueous solution, we compared 20 tomato varieties′ salt tolerance in their sprout stage and seedling stage according to subjection values of salt toxicity coefficient of indices determined and the sum subjection values and classified the 20 varieties in the two stages by cluster analysis using their single salt tolerance coefficient subjection values and the sum subjection values. Results indicate that salt tolerance in the two growth stages is different, and salt tolerant and moderate salt tolerant tomato varieties have a 53.85% overlap. Germination energy, germination rate, germination index, vigor index, shoot height, shoot fresh weight can serve as indicators to assess salt tolerance of tomato varieties in sprout stage comprehensively. While the fresh and dry weight of the whole plant, shoot height, root length, index of seedling growth and root/shoot ratio can be used to assess salt tolerance of tomato varieties in seedling stage.

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