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盐胁迫是作物生产面临的主要非生物逆境之一，而裸大麦作为一种耐盐性较强作物，在改良盐碱土壤和保障粮食安全上具有潜在价值。以18个上海裸大麦地方品种为材料，在苗期调查株高、根长、根干质量和地上部干质量4个形态学指标以及w(Na+)、w(K+)和w(Na+)/w(K+)等生理指标，进行耐盐性筛选与鉴定。方差分析表明，各性状在品种间和不同处理条件间差异均表现出高度统计学意义(P<0.01)，并且除株高外，其余各性状在不同处理与品种间的互作也达到极显著水平(P<0.01)。变异系数分析表明，干质量相关指标的变异系数较大，并且株高、w(K+)和w(Na+)/w(K+)的变异系数在盐胁迫下升高了，而其余性状则降低了。相关性分析表明，在正常和盐胁迫条件下，根长、株高和地上部干质量间都呈极显著正相关；而w(Na+)、w(K+)仅分别与w(Na+)/w(K+)呈极显著正相关或负相关。研究获得了2个耐盐性较强的裸大麦品种，探讨了钠、钾相关性状与裸大麦耐盐性的关系。
Abstract：Salt stress is one of the main abiotic stresses faced by crop production, and hulless barley, as a highly salt-tolerant crop, has potential value in improving saline-alkali soil and ensuring food security. In this study, 18 Shanghai hulless barley landraces were used as donor materials,and their salt tolerance was screened and identified by investigating four morphological traits of plant height, root length, root stem weight and dry matter weight of above-ground parts, as well as Na+, K+content and Na+/K+ratio physiological traits at the seedling stage. The analysis of variance showed that there were extremely significant differences among different hulless barley landraces and different treatments, and the interaction between different treatments and different hulless barley landraces also reached a very significant level except plant height. The coefficient of variation analysis showed that the coefficients of variation of dry matter weight-related traits were larger, and the coefficients of variation of plant height, K+content and Na+/K+ratio increased under salt stress, while the other traits decreased. Correlation analysis showed that there were significant positive correlations between root length, plant height and dry matter weight of above-ground parts under normal and salt stress conditions. However, the contents of Na+and K+were only significantly positively or negatively correlated with the Na+/K+ratio, respectively. In this study, two hulless barley landraces with strong salt tolerance were obtained, and the relationship between sodium and potassium related traits and salt tolerance of hulless barley was also discussed.
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基本信息:
DOI：10.14069/j.cnki.32-1769/s.2024.06.005
中图分类号:S512.3
引用信息:
[1]刘世森,杨华,郭珍珠,等.裸大麦地方品种苗期耐盐性筛选和鉴定指标研究[J].大麦与谷类科学,2024,41(06):29-36.DOI:10.14069/j.cnki.32-1769/s.2024.06.005.
基金信息:
上海市农科院中青年学术和技术带头人“攀高”计划（PG22211）; 卓越团队建设项目[沪农科卓(2022)018]; 国家现代农业产业技术体系建设专项（CARS-05-01A-02）