Differential responses of Brassica napus cultivars to dual effects of magnesium oxide nanoparticles

文献类型： 外文期刊

第一作者： Ali, Sharafat

作者： Ali, Sharafat;Ulhassan, Zaid;Ali, Skhawat;Kaleem, Zohaib;Yousaf, Muhammad Arslan;Jalil, Sanaullah;Zhou, Weijun;Sheteiwy, Mohamed S.;Sheteiwy, Mohamed S.;Ali, Shafaqat;Waseem, Muhammad;Ali, Sharafat;Ali, Sharafat;Wang, Jian

作者机构：

关键词： Antioxidant defense system; Magnesium oxide nanoparticles; Nanotechnology; Oilseed crops; Oxidative stress; Sustainable agriculture

期刊名称：ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH （ 影响因子：5.8； 五年影响因子：5.4 ）

ISSN： 0944-1344

年卷期： 2024 年 31 卷 8 期

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收录情况： SCI

摘要： Magnesium oxide nanoparticles (MgO NPs) have great potential to enhance the crop productivity and sustainability of agriculture. Still, a thorough understanding is lacking about its essentiality or toxicity and precise dose for the safe cultivation of oilseed crops. Thus, we assessed the dual effects of MgO NPs (control, 5, 10, 20, 40, 80, and 200 mg/L) on the seed germination, growth performance, photosynthesis, total soluble protein, total carbohydrates, oxidative stress markers (hydrogen peroxide as H2O2 and superoxide anion as O-2(center dot-)), lipid peroxidation as MDA, and antioxidant defence machinery (SOD, CAT, APX, and GR activities, and GSH levels) of seven different oilseeds (Brassica napus L.) cultivars (ZY 758, ZD 649, ZD 635, ZD 619, GY 605, ZD 622, and ZD 630). Our findings revealed that low doses of MgO NPs (mainly at 10 mg/L) markedly boosted the seed germination, plant growth (shoot and root lengths) (15-22%), and biomass (fresh and dry) (11-19%) by improving the levels of photosynthetic pigments (14-27%), net photosynthetic rate, stomatal conductance, photosynthetic efficiency (Fv/Fm), total soluble protein and total carbohydrates (16-36%), antioxidant defence, and reducing the oxidative stress in B. napus tissues. Among all B. napus cultivars, these beneficial effects of MgO NPs were pronounced in ZD 635. ile, elevated levels of MgO NPs (particularly at 200 mg/L) induced oxidative stress, impaired antioxidant scavenging potential, photosynthetic inhibition, protein oxidation, and carbohydrate degradation and lead to inhibit the plant growth attributes. These inhibitory effects were more pronounced in ZD 622. Collectively, low-dose MgO NPs reinforced the Mg contents, protected the plant growth, photosynthesis, total soluble carbohydrates, enzyme activities, and minimized the oxidative stress. While, the excessive MgO NP levels impaired the above-reported traits. Overall, ZD 622 was highly susceptible to MgO NP toxicity and ZD 635 was found most tolerant to MgO NP toxicity.

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