Salinity tolerance of 47 wild barley genotypes and six barley cultivars was evaluated under control and salinity stress (300 mM NaCl) conditions. Shoot and root dry weight (DW), plant height, membrane stability index (MSI), relative water content, survival rate, leaf malondialdehyde (MDA) and proline contents, root and leaf Na, K, Ca and K/Na ratio, and chlorophyll a fluorescence were measured. Salinity stress caused significant increase in the MDA, proline content, Na and Ca concentrations of the roots and leaves, but resulted in a decrease in the other traits. H. spontaneum genotypes were considerably less affected by the salinity than the genotypes of H. vulgare. Plant survivability was negatively correlated with the Na concentration (r =−.66) but positively correlated with the leaf K/Na ratio (r = .67) and MSI (r = .68). Tolerance mechanisms such as ion exclusion (Na) were likely to be present in the wild barley causing K/Na homeostasis as well as the much lower root and shoot Na, resulting in the higher survival rate.

中文翻译：

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野生大麦大麦ssp的耐盐性。自发性

在对照和盐度胁迫（300 mM NaCl）条件下，评估了47种野生大麦基因型和6个大麦品种的耐盐性。枝条和根的干重（DW），株高，膜稳定性指数（MSI），相对水分，存活率，叶丙二醛（MDA）和脯氨酸含量，根和叶的Na，K，Ca和K / Na比以及测定叶绿素a的荧光。盐分胁迫导致根和叶的MDA，脯氨酸含量，Na和Ca浓度显着增加，但其他性状却下降。^ h。与H基因型相比，自发性基因型受盐度的影响要小得多。庸俗的。植物存活率与Na含量呈负相关（r  = ˆ.66），但与叶片K / Na比（r  = .67）和MSI（r  = .68）呈正相关。野生大麦中可能存在诸如离子排斥（Na）之类的耐受机制，导致K / Na稳态以及低得多的根和芽Na，导致更高的存活率。