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首页> 外文期刊>International Journal of Horticulture & Crop Science Research >Salinity Effects on Na+, K+, ABA and IAA Concentration and Distribution in Two Contrasting Rice (Oryza sativa) Genotypes During Seedling Stage
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Salinity Effects on Na+, K+, ABA and IAA Concentration and Distribution in Two Contrasting Rice (Oryza sativa) Genotypes During Seedling Stage

机译：盐度在幼苗期间对幼苗稻（Oryza Sativa）基因型中Na +，K +，ABA和IAA浓度和分布的盐度影响

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摘要

Soil salinity affects plant growth and development and is a major concern for crops productivity worldwide. Rice {Oryza sativa), a salt-sensitive species, particularly during the seedling stage and has considerable genetic variation for salt tolerancewithin the cultivated gene pool. This study, was conducted to determine the effects of salinity on [Na+], [K+], [ABA], [IAA] and their distributions in plant tissues during seedling stage. Two rice genotypes differing in their tolerance to salinity wereevaluated in a greenhouse experiments under salt stress during seedling stage. In salt-sensitive cultivar Na+ accumulated in all leaves and [K+] had not changed, while in tolerant cultivar Na+ and K+ concentrated in oldest leaves. Results showed that [ABA] in sensitive genotype was much higher than tolerant genotype whilst, [IAA] was higher in tolerant genotype. At the beginning of salinity stress, IAA in root and leaf sheaths of both genotypes had no significant change, while after extension of salinity stress, distribution of [IAA] in tolerant cultivar gradually changed from roots and leaf sheaths to leaves, especially older leaves. Such distribution was not observed in sensitive genotype. These results show that differences in the level of osmoticaand saline stress are related to their different capacity of phytohormones synthesis and transport.
机译：土壤盐度影响植物生长和发展，是全球农作物生产力的主要关注点。米{oryza sativa），一种盐敏感物种，特别是在幼苗阶段，并且具有培养基因库的盐耐药性具有相当大的遗传变异。本研究进行了在苗期期间确定盐度对盐度对[Na +]，[K +]，γ，[IAA]及其在植物组织中的分布的影响。两种水稻基因型在苗期盐胁迫下的温室实验中差异不同于盐度的耐受性。在所有叶片中累积的盐敏感品种Na +没有变化，而在耐受培养的Na +和K +以最古老的叶子中浓缩。结果表明，敏感基因型中的[ABA]远高于耐受性基因型，而耐受性基因型较高。在盐度的开始时，两种基因型的根和叶鞘中的IAA没有显着变化，而在盐度延长后，耐受性品种的分布从根和叶护套逐渐变成叶子，尤其是较旧的叶子。在敏感基因型中未观察到这种分布。这些结果表明，渗透盐胁迫水平的差异与其不同能力的植物激素合成和运输有关。

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