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首页> 外文期刊>Acta botanica sinica >Effect of K~+ Nutrition on Growth and Activity of Leaf Tonoplast V-H~+-ATPase and V-H~+-PPase of Suaeda salsa Under NaCl Stress
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Effect of K~+ Nutrition on Growth and Activity of Leaf Tonoplast V-H~+-ATPase and V-H~+-PPase of Suaeda salsa Under NaCl Stress

机译：钾营养对NaCl胁迫下盐碱蓬叶片液泡膜V-H〜+ -ATPase和V-H〜+ -PPase活性的影响

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摘要

Suaeda salsa L. seedlings grown in Hoagland nutrient solution were treated with different concentrations of NaCl combined with two levels of K~+ (12 μmol/L and 6 mmol/L) to study the K~+ nutrition effect on plant growth and leaf tonoplast V-H~+-ATPase and V-H~+-PPase activity. Increase of K~+ supply in the culture solution markedly increased the fresh weight, dry weight and K~+ content of S. salsa plants. Western blot analysis showed that the leaf V-H~+-ATPase of S. salsa was at least composed of A, B, C, D, E and c sub-units, and their expression decreased with the increase of NaCl concentration under K~+ starvation (12 μmol/L K~+), but increased under normal K~+ application (6 mmol/L K~+). Leaf V-H~+-PPase molecular weight was about 72.6 kD and its expression increased as NaCl concentration increased under both high or low levels of K~+ concentration in nutrient solution. There was a positive correlation between of V-H~+-ATPase or V-H~+-PPase activity and the amounts of their expression. Results in this study suggest that K~+ nutrition plays an important role in the salt tolerance of S. salsa, and K~+ is involved in the regulation of V-H~+-ATPase or V-H~+-PPase activity under salt stress.
机译：在Hoagland营养液中生长的Suaeda salsa L.幼苗用不同浓度的NaCl和两种水平的K〜+（12μmol/ L和6 mmol / L）结合处理，以研究K〜+营养对植物生长和叶片液泡膜的影响VH〜+ -ATPase和VH〜+ -PPase活性。培养液中钾离子供应的增加显着提高了莎莎沙门氏菌的鲜重，干重和钾离子含量。 Western blot分析表明，莎草叶片VH〜+ -ATPase至少由A，B，C，D，E和c亚基组成，其表达随K〜+下NaCl浓度的增加而降低。饥饿（12μmol/ LK〜+），但在正常的K〜+施用（6 mmol / LK〜+）下增加。在高浓度或低浓度的营养液中，叶片V-H〜+ -PPase分子量约为72.6 kD，其表达随NaCl浓度的增加而增加。 V-H〜+ -ATPase或V-H〜+ -PPase活性与其表达量呈正相关。研究结果表明，钾盐营养在盐渍沙门氏菌的耐盐性中起着重要作用，而钾盐参与了盐胁迫下V-H〜+ -ATPase或V-H〜+ -PPase活性的调节。

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