Table_1_Screening Oat Genotypes for Tolerance to Salinity and Alkalinity.DOC

A set of four experiments was conducted to develop methods for screening oat tolerance to salt and alkali and the following results were obtained. (1) In experiment 1, 68.5 mmol L-1 salt and 22.5 mmol L-1 alkali were identified as appropriate concentrations for determining oat tolerance to salinity and alkalinity during germination. (2) These concentrations were used in experiment 2 to screen 248 oat genotypes and 21 were identified to be tolerant to salinity and alkalinity in germination. (3) In experiment 3, one salt treatment, 40 L of Na2SO4:NaCl (1:1), 150 mmol L-1, was found to be optimal for screening oat tolerance to salinity during growth and development. For alkalinity tolerance, the optimal treatment was 40 L of Na2CO3:NaHCO3 (1:1) at 75 mmol L-1. (4) No significant correlation was found between tolerances at the germination and adult stages or between tolerances to salt and alkali. Three lines were found to be tolerant to both salt and alkali in both germination and adult stages. (5) In experiment 4, 25 out of 262 oat genotypes were found to be tolerant to both salinity and alkalinity. (6) GGE biplot analysis was found to be effective in interpreting the multivariate data and the plastic cone-container system was found to be cost-effective system for screening adult plant tolerance to salt and alkali. (7) The symptoms of salt stress and alkali stress were found to be different; alkali stress mainly reduces the chlorophyll content, while salinity mainly disrupts water absorption.

进行了一系列四项实验，旨在开发筛选燕麦对盐碱耐受性的方法，并获得了以下结果：(1) 在实验1中，确定了68.5 mmol L-1的盐浓度和22.5 mmol L-1的碱浓度是确定燕麦在发芽过程中对盐碱耐受性的适宜浓度。(2) 在实验2中，利用上述浓度筛选了248个燕麦基因型，其中21个被认定为在发芽过程中对盐碱具有耐受性。(3) 在实验3中，发现了一种盐处理方法，即使用40升的Na2SO4:NaCl（1:1）溶液，浓度为150 mmol L-1，对于筛选燕麦在生长和发育过程中的耐盐性是最优的。对于耐碱性，最适宜的处理方法是使用40升的Na2CO3:NaHCO3（1:1）溶液，浓度为75 mmol L-1。(4) 在发芽阶段和成熟阶段的耐受性之间，或对盐和碱的耐受性之间，未发现显著的相关性。发现有三种燕麦品种在发芽和成熟阶段都对盐和碱具有耐受性。(5) 在实验4中，从262个燕麦基因型中发现了25个对盐碱都具有耐受性。(6) GGE双因素图分析被证明在解释多变量数据方面是有效的，而塑锥容器系统则被证明是一种成本效益高的筛选成年植物耐盐碱性的系统。(7) 盐胁迫和碱胁迫的症状被发现是不同的；碱胁迫主要降低叶绿素含量，而盐胁迫主要干扰水分吸收。