不同耐盐性小麦品种叶鞘的钠钾选择性
Na+/K+ selectivity of leaf sheath in wheat cultivars differing in salt tolerance.
作者信息
Ding Tong-Lou, Duan Pei, Wang Bao-Shan
机构信息
College of Life Sciences, Shandong Normal University, Jinan 250014, China.
出版信息
Zhi Wu Sheng Li Yu Fen Zi Sheng Wu Xue Xue Bao. 2006 Feb;32(1):123-6.
A salt-tolerant wheat cultivar (DK961) and a salt-sensitive one (LM15) were exposed to 200 mmol/L NaCl for 3 d to study selectivity in transport of K(+) and Na(+) of the leaf sheath. Na(+) content of leaf sheath and K(+) content of leaf blade of DK961 were significantly higher than those of LM15, which led to a lower Na(+)/K(+) ratio of leaf blade of DK961 than that of LM15. These results suggested that leaf sheath of DK961 had much stronger abilities of limiting Na(+) transport and allowing K(+) transport from leaf sheath to leaf blade than that of LM15 to maintain lower Na(+)/K(+) ratio of leaf blade under NaCl stress, indicating that leaf sheath may play an important role in wheat salt tolerance.
将耐盐小麦品种（DK961）和盐敏感品种（LM15）置于200 mmol/L NaCl处理3天，以研究叶鞘对K(+)和Na(+)的运输选择性。DK961叶鞘的Na(+)含量和叶片的K(+)含量显著高于LM15，这导致DK961叶片的Na(+)/K(+)比值低于LM15。这些结果表明，在NaCl胁迫下，DK961叶鞘限制Na(+)运输和允许K(+)从叶鞘向叶片运输的能力比LM15强得多，以维持叶片较低的Na(+)/K(+)比值，表明叶鞘在小麦耐盐性中可能起重要作用。
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