Islam S, Malik A I, Islam A K M R, Colmer T D
School of Plant Biology, The University of Western Australia, 35 Stirling Highway, Crawley, WA 6009, Australia.
J Exp Bot. 2007;58(5):1219-29. doi: 10.1093/jxb/erl293. Epub 2007 Feb 5.
Growth, grain production, and physiological traits were evaluated for Hordeum marinum, Triticum aestivum (cv. Chinese Spring), and a H. marinum-T. aestivum amphiploid, when exposed to NaCl treatments in a nutrient solution. H. marinum was more salt tolerant than T. aestivum and the amphiploid was intermediate, both for vegetative growth and relative grain production. H. marinum was best able to 'exclude' Na(+) and Cl(-), particularly at high external NaCl. At 300 mM NaCl, concentrations of Na(+) (153 micromol g(-1) dry mass) and Cl(-) (75 micromol g(-1) dry mass) in the youngest fully-expanded leaf blade of H. marinum were, respectively, only 7% and 4% of those in T. aestivum; and in the amphiploid the Na(+) and Cl(-) concentrations were 39% and 36% of those in T. aestivum. Glycinebetaine and proline concentrations in the youngest fully-expanded leaf blade of plants exposed to 200 mM NaCl were highest in H. marinum (128 and 60 micromol g(-1) dry mass, respectively), lowest in T. aestivum (85 and 37 micromol g(-1) dry mass), and intermediate in the amphiploid (108 and 54 micromol g(-1) dry mass). Thus, salt tolerance of H. marinum was expressed in the H. marinum-T. aestivum amphiploid.
在营养液中对盐生大麦、普通小麦（中国春品种）以及盐生大麦 - 普通小麦双二倍体进行NaCl处理时，评估了它们的生长、籽粒产量和生理特性。无论是营养生长还是相对籽粒产量，盐生大麦都比普通小麦更耐盐，而双二倍体则介于两者之间。盐生大麦最能够“排除”Na⁺和Cl⁻，尤其是在外部NaCl浓度较高时。在300 mM NaCl条件下，盐生大麦最幼嫩的完全展开叶片中的Na⁺浓度（153 μmol g⁻¹干重）和Cl⁻浓度（75 μmol g⁻¹干重）分别仅为普通小麦的7%和4%；在双二倍体中，Na⁺和Cl⁻浓度分别为普通小麦的39%和36%。在暴露于200 mM NaCl的植物最幼嫩的完全展开叶片中，甘氨酸甜菜碱和脯氨酸浓度在盐生大麦中最高（分别为128和60 μmol g⁻¹干重），在普通小麦中最低（85和37 μmol g⁻¹干重），在双二倍体中则介于两者之间（108和54 μmol g⁻¹干重）。因此，盐生大麦的耐盐性在盐生大麦 - 普通小麦双二倍体中得以体现。
