Botany and Microbiology Department, College of Science, King Saud University, Riyadh, Saudi Arabia; Department of Botany, S.P. College, Srinagar, Jammu and Kashmir, India.
Botany and Microbiology Department, College of Science, King Saud University, Riyadh, Saudi Arabia.
J Hazard Mater. 2021 Apr 15;408:124852. doi: 10.1016/j.jhazmat.2020.124852. Epub 2020 Dec 14.
The present study reveals the effect of mercury (Hg) and sodium nitroprusside (SNP) on plant growth and metabolism in soybean cultivars (Pusa-24, Pusa-37and Pusa-40). Mercury stress decreased growth and biomass yield, and gas exchange attributes in all soybean cultivars. External supplementation of SNP mitigated Hg toxicity by improving growth and gas exchange parameters. Electrolyte leakage (EL) increased accompanied with elevated levels of malondialdehyde (MDA) and HO under Hg stress, however, they were found to be reduced in all cultivars upon the exogenous application of SNP. The activities of anti-oxidative enzymes, superoxide dismutase and catalase (SOD and CAT) and those enzymes involved in the ascorbate-glutathione pathway were impaired by Hg stress, but they were regulated by the application of SNP. Accumulation of Hg and NO in the shoots and roots were also regulated by the application of NO. Although, all three cultivars were affected by Hg stress, Pusa-37 was relatively less affected. Mercury stress affected the growth and development of different soybean cultivars, but Pusa-37 being tolerant was less affected. Pusa-37 was found to be more responsive to SNP than Pusa-24, Pusa-40 under Hg toxicity. The external supplementation of SNP could be a sustainable approach to economically utilize Hg affected soils.
本研究揭示了汞（Hg）和硝普酸钠（SNP）对大豆品种（Pusa-24、Pusa-37 和 Pusa-40）生长和代谢的影响。汞胁迫降低了所有大豆品种的生长和生物量产量以及气体交换特性。SNP 的外源补充通过改善生长和气体交换参数缓解了 Hg 毒性。电解质渗漏（EL）增加伴随着 MDA 和 HO 水平升高，然而，在所有品种中外源应用 SNP 时发现它们减少了。Hg 胁迫下，抗氧化酶、超氧化物歧化酶和过氧化氢酶（SOD 和 CAT）以及参与抗坏血酸-谷胱甘肽途径的酶的活性受到损害，但 SNP 的应用调节了它们。Hg 和 NO 在地上部和根部的积累也受到 NO 的应用调节。尽管所有三个品种都受到 Hg 胁迫的影响，但 Pusa-37 相对受影响较小。Hg 胁迫影响不同大豆品种的生长和发育，但 Pusa-37 具有耐受性，受影响较小。与 Pusa-24、Pusa-40 相比，Pusa-37 在 Hg 毒性下对 SNP 的反应更为敏感。SNP 的外源补充可能是经济利用受 Hg 影响土壤的可持续方法。
