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首页> 外文期刊>Australian Journal of Crop Science >Nitric oxide enhances the adaptive responses of lupine plants against heavy-metal stress
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Nitric oxide enhances the adaptive responses of lupine plants against heavy-metal stress

机译：一氧化氮增强了羽扇豆植物对重金属胁迫的适应性反应

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The present work investigates the possible protective role of nitric oxide (NO) against heavy metals stress in Lupinus termis L. plants. Agreenhouse experiment was conducted as a 2 x 2 factorial design with five replications. Lupine seedlings were treated with twoconcentrations (0.4 mM and 0.6 mM) of sodium nitroprusside (SNP as an NO donor) and subjected to high levels of nickel (Ni) sulfate(100 and 150 mM). The toxic effects of Ni on L. termis plants were evaluated by measuring the oxidative stress markers such as lipidperoxidation, hydrogen peroxide and electrolyte leakage. In addition, growth parameters, endogenous phytohormones, photosyntheticpigment, calcium, magnesium and Ni accumulation in lupin plants grown under Ni toxicity in the presence or absence of NO were alsodetermined. Carbohydrate, organic acid and proline contents were also measured to determine the possible NO-mediated defensestrategies in lupine plants to resist Ni stress. The obtained results proved that, Ni toxicity resulted in significantly elevated levels ofoxidative stress markers, as well as abscisic acid, jasmonic acid and proline contents, which are associated with significant reduction ingrowth parameters, photosynthetic pigments, carbohydrate, indole acetic acid and gibberellic acid contents compared with controlplants. SNP treatments significantly alleviated the toxic effect of Ni on Lupinus termis L. and increased the amounts of proline, solublesugars and polysaccharides in shoots and roots, which could be an induced defensive mechanism against heavy-metal stress. Treatmentwith 0.4 mM SNP was more effective in increasing lupine plants tolerance to Ni toxicity than the 0.6 mM SNP.
机译：本工作调查一氧化氮（NO）可能对羽扇豆植物重金属胁迫的保护作用。以2 x 2阶乘设计进行Agreenhouse实验，重复五次。用两种浓度（0.4 mM和0.6 mM）的硝普钠（SNP作为NO供体）处理羽扇豆幼苗，并使其经受高浓度的硫酸镍（Ni）（100和150 mM）处理。通过测量氧化应激标志物，如脂质过氧化，过氧化氢和电解质渗漏，评估了镍对白屈菜的毒性作用。另外，还确定了在有或没有NO的条件下在Ni毒性下生长的羽扇豆植物的生长参数，内源性植物激素，光合色素，钙，镁和Ni的积累。还测量了碳水化合物，有机酸和脯氨酸的含量，以确定羽扇豆植物中可能的NO介导的防御策略来抵抗Ni胁迫。获得的结果证明，Ni毒性导致氧化应激标志物以及脱落酸，茉莉酸和脯氨酸含量显着升高，这与显着降低的生长参数，光合色素，碳水化合物，吲哚乙酸和赤霉素含量有关。与对照植物相比。 SNP处理显着减轻了Ni对羽扇豆的毒性作用，并增加了芽和根中脯氨酸，可溶性糖和多糖的含量，这可能是诱导抗重金属胁迫的防御机制。与0.6 mM SNP相比，用0.4 mM SNP处理在提高羽扇豆植物对Ni毒性的耐受性方面更有效。

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