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首页> 外文期刊>African Journal of Biotechnology >Differential responses of growth, chlorophyll content, lipid peroxidation and accumulation of compatible solutes to salt stress in peanut (Arachis hypogaea L.) cultivars
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Differential responses of growth, chlorophyll content, lipid peroxidation and accumulation of compatible solutes to salt stress in peanut (Arachis hypogaea L.) cultivars

机译：花生（Arachis hypogaea L.）品种的生长，叶绿素含量，脂质过氧化和相容性溶质积累对盐胁迫的差异响应

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摘要

The present study was aimed to compare differential responses of growth, chlorophyll content, lipid peroxidation and accumulation of compatible solutes in peanut (Arachis hypogaea L.) cultivars: Fleur 11 (salt-tolerant), Mbiah and PC 79-79 (moderately-tolerant) and Vanda (salt-sensitive) at the vegetative growth stage, under greenhouse conditions, in the presence of 0, 50, 100 or 200 mM NaCl. The root dry weight (RDW) and shoot dry weight (SDW) of cv. Vanda decreased significantly (p< 0.05) in salt-treated plants than those of cvs. Fleur 11, Mbiah and PC 79-79. The SDW reduction was notably noted at 100 mM NaCl in cvs. Mbiah and PC 79-79, while cv. Fleur 11 showed significantly (P<0.05) decrease in salt-treated plants only at 200 mM NaCl but had higher SDW accumulation than others. The leaf chlorophyll content increased in cvs. Fleur 11 and PC 79-79 and decreased in cv. Vanda with increasing NaCl levels. Proline (PRO) and glycine betaine (GB) contents significantly (p<0.05) increase, for all cultivars, in the stressed plants with the highest quantity in Fleur 11 and the lowest in Vanda. Malondialdehyde levels increased under salt stress in the leaves of cv. Vanda but decreased in cvsMbiah, PC 79-79 and Fleur 11 at 100 and 200 mM, respectively. Total phenolic content increased significantly (p < 0.05) at 200 mM NaCl in the leaves of cv. Vanda than others, while cv. Fleur 11 showed the lowest increase. The salt-tolerant cv. Fleur 11 exhibits a better protection mechanism against oxidative damage caused by salt stress maintaining a higher accumulation of PRO and GB than others. Higher PRO and GB accumulation in the leaves may be regarded as potential biochemical indicator for earlier selection of salt tolerant peanut and targets for improvement through transgenic approaches.?Keywords:?Arachis hypogaea, glycine betaine, growth, lipid peroxidation, proline, salt stress.
机译：本研究旨在比较花生（Arachis hypogaea L.）品种中的生长，叶绿素含量，脂质过氧化和相容性溶质积累的差异响应：Fleur 11（耐盐），Mbiah和PC 79-79（中度耐性） ）和Vanda（对盐敏感）处于营养生长阶段，在温室条件下，存在0、50、100或200 mM NaCl。简历的根干重（RDW）和枝干重（SDW）。盐处理过的植物中的vanda显着低于cvs（p <0.05）。 Fleur 11，Mbiah和PC 79-79。在cvs中，在100 mM NaCl中，SDW的减少尤为明显。 Mbiah和PC 79-79，而简历。仅在200 mM NaCl盐处理的植物中，Fleur 11表现出显着（P <0.05）降低，但SDW积累高于其他。叶片中叶绿素含量增加。 Fleur 11和PC 79-79，简历降低。随着NaCl含量增加，Vanda含量增加。在所有品种中，脯氨酸（PRO）和甘氨酸甜菜碱（GB）含量在所有品种中均显着增加（p <0.05），而在紧张的植物中，Fleur 11中的量最高，而Vanda中的最低。在盐胁迫下简历叶片中丙二醛水平增加。万代，但cvsMbiah，PC 79-79和Fleur 11的浓度分别为100和200 mM时降低。在200 mM NaCl中，cv叶中的总酚含量显着增加（p <0.05）。万代比别人，而简历。 Fleur 11的增幅最低。耐盐简历。 Fleur 11表现出更好的保护机制，可抵抗盐胁迫引起的氧化损伤，从而保持较高的PRO和GB积累。叶片中较高的PRO和GB积累可能被认为是较早选择耐盐花生的潜在生化指标，并且是通过转基因方法进行改良的目标。关键词：花生花生，甘氨酸甜菜碱，生长，脂质过氧化，脯氨酸，盐胁迫。

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