Department of Botany, Division of Science and Technology, University of Education, Lahore, Pakistan.
Senior Superintendent Gardens, RO-II office, University of the Punjab, Lahore, Pakistan.
Environ Pollut. 2022 Aug 15;307:119413. doi: 10.1016/j.envpol.2022.119413. Epub 2022 May 4.
Current research reveals the positive role of iron oxide nanoparticles (IONPs) and selenium (Se) in extenuation of arsenic (As) induced toxicity in Cucumis melo. C. melo plants grown in As spiked soil (20 mg kg As) showed reduced growth, chlorophyll (Chl) content, photosynthetic rate, stomatal conductivity and transpiration. On the other hand, the alone applications of IONPs or Se improved growth and physiochemical parameters of C. melo plants. Additionally, exogenous application IONPs and Se synergistically improved the activity of antioxidative enzymes and glyoxalase system in C. melo plants. In addition, the collective treatment of IONPs and Se reduced As uptake, enhanced rate of photosynthesis and increased gas exchange attributes of C. melo plants under As stress. Interactive effect of IONPs and Se regulated reduced glutathione (GSH), oxidized glutathione (GSSG) and ascorbate (AsA) content in C. melo plants exposed to As-contaminated Soil. IONPs and Se treatment also regulated expression of respiratory burst oxidase homologue D (RBOHD) gene, chlorophyll synthase (CHLG) and protochlorophyllide oxidoreductase (POR). Therefore, the combined treatment of IONPs and Se may enhance the growth of crop plants by alleviating As stress.
目前的研究揭示了氧化铁纳米粒子（IONPs）和硒（Se）在减轻甜瓜中砷（As）诱导的毒性方面的积极作用。在砷污染土壤（20mgkg As）中生长的甜瓜植物表现出生长、叶绿素（Chl）含量、光合速率、气孔导率和蒸腾作用降低。另一方面，IONPs 或 Se 的单独应用提高了甜瓜植物的生长和生理化学参数。此外，外源性应用 IONPs 和 Se 协同提高了甜瓜植物抗氧化酶和糖醛酸酶系统的活性。此外，在砷胁迫下，IONPs 和 Se 的联合处理减少了甜瓜植物对砷的吸收，提高了光合作用速率，并增加了气体交换特性。IONPs 和 Se 的互作效应调节了暴露在受污染土壤中的甜瓜植物中还原型谷胱甘肽（GSH）、氧化型谷胱甘肽（GSSG）和抗坏血酸（AsA）的含量。IONPs 和 Se 处理还调节了呼吸爆发氧化酶同源物 D（RBOHD）基因、叶绿素合酶（CHLG）和原叶绿素氧化还原酶（POR）的表达。因此，IONPs 和 Se 的联合处理可能通过减轻砷胁迫来增强作物植物的生长。
