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首页> 外文期刊>Physiology and Molecular Biology of Plants >Influence of exogenous application of glycinebetaine on antioxidative system and growth of salt-stressed so seedlings (Glycine max L.)
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Influence of exogenous application of glycinebetaine on antioxidative system and growth of salt-stressed so seedlings (Glycine max L.)

机译：外源施用甜菜碱对盐胁迫下幼苗的抗氧化系统和生长的影响（Glycine max L.）

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摘要

Glycinebetaine is one of the most competitive com pounds which play an important role in salt stress in plants. Ir this study, the enhanced salt tolerance in soybean (Glycine ma> L.) by exogenous application of glycinebetaine was evaluated To improvesalt tolerance at the seedling stage, GB was appliec in four different concentrations (0, 5, 25 and 50 mM) as a pre-sowing seed treatment. Salinity stress in the form of a fina concentration of 150 mM sodium chloride (NaCl) over z 15 day period drastically affected the plants as indicated by increased proline, MDA and Na+ content of soybean plants, In contrast, supplementation with 50 mM GB improved growth of soybean plants under NaCl as evidenced by a decrease in proline, MDA and Na+ content of soybeanplants. Further analysis showed that treatments with GB, resulted in increasing ol CAT and SOD activity of soybean seedlings in salt stress. We propose that the role of GB in increasing tolerance to salinity stress in soybean may result from either itsantioxidant capacity by direct scavenging of H_2O_2 or its role in activating CAT activity which is mandatory in scavenging H_2O_25.
机译：甘氨酸甜菜碱是最具竞争力的化合物之一，在植物的盐胁迫中起重要作用。在这项研究中，评估了通过外源施用甘氨酸甜菜碱增强的大豆（Glycine ma> L.）的耐盐性。为提高幼苗期的耐盐性，GB以四种不同浓度（0、5、25和50 mM）施用播前种子处理。在15天的时间内，最终浓度为150 mM氯化钠（NaCl）的盐分胁迫严重影响了植物，大豆植物的脯氨酸，MDA和Na +含量增加表明，相反，补充50 mM GB可以改善生长NaCl胁迫下大豆植株的脯氨酸含量，MDA和Na +含量降低证明了这一点。进一步的分析表明，GB处理可提高盐胁迫下大豆幼苗的ol CAT和SOD活性。我们认为，GB在增加大豆对盐分胁迫的耐受性中的作用可能是由于其直接清除H_2O_2的抗氧化能力或其在激活CAT活性中的作用所致，而CAT活性是清除H_2O_25所必需的。

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