外源纳米氧化锌通过调节理化活性和营养平衡缓解玉米镉胁迫

IF 3.4 4区 环境科学与生态学 Q2 ENVIRONMENTAL SCIENCES
Shakil Ahmed, Sana Ashraf, Nasim Ahmad Yasin, Rehana Sardar, Ibrahim Al-Ashkar, Magdi T Abdelhamid, Ayman El Sabagh
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引用次数: 0

摘要

农业土壤中的镉(Cd)污染日益严重,导致植物生长和产量下降。本研究旨在确定绿色合成的氧化锌纳米颗粒(ZnO-NPs)对镉胁迫条件下玉米的理化活性、营养、生长和产量的影响。为此,研究人员通过叶面喷洒的方式向玉米施用了由芳香茜草合成的 ZnO-NPs (450 ppm 和 600 ppm),并将其用作种子引诱剂。与对照组相比,加镉植株的株高(35.24%)、生物量产量(43.86%)、矿物质含量、气体交换属性和产量(37.62%)均明显下降。与只添加镉的植物相比,添加 450 ppm ZnO-NPs 的种子增加了植株高度(18.46%)、总叶绿素(80.07%)、抗坏血酸(25.10%)、DPPH 活性(26.66%)和土壤矿物质吸收量(Mg+2(38.86%)、K+(27.83%)和 Zn+2(43.68%))。相反,叶面喷施 450 ppm ZnO-NPs 与只施用镉的植株相比,植株高度(8.22%)、总叶绿素含量(73.59%)、抗坏血酸(21.39%)和 DPPH 活性(17.61%)以及产量参数;玉米棒直径(19.45%)和籽粒数(6.35%)均有所提高。本研究的发现为在镉胁迫土壤中利用绿色合成的氮磷钾进行更安全、更经济的作物生产铺平了道路,并从分子水平深入揭示了氮磷钾处理的内在机制,为利用氮磷钾改善植物生长和产量提供了有力的证据。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Exogenously applied nano-zinc oxide mitigates cadmium stress in Zea mays L. through modulation of physiochemical activities and nutrients homeostasis.

The increasing levels of cadmium (Cd) pollution in agricultural soil reduces plant growth and yield. This study aims to determine the impact of green synthesized zinc oxide nanoparticles (ZnO-NPs) on the physiochemical activities, nutrition, growth, and yield of Zea mays L. under Cd stress conditions. For this purpose, ZnO-NPs (450 ppm and 600 ppm) synthesized from Syzygium aromaticum were applied through foliar spray to Z. mays and also used as seed priming agents. A significant decline in plant height (35.24%), biomass production (43.86%), mineral content, gas exchange attributes, and yield (37.62%) was observed in Cd-spiked plants compared to the control. While, 450 ppm ZnO-NPs primed seed increased plant height (18.46%), total chlorophyll (80.07%), improved ascorbic acid (25.10%), DPPH activity (26.66%), and soil mineral uptake (Mg+2 (38.86%), K+ (27.83%), and Zn+2 (43.68%) as compared to plants only spiked with Cd. On the contrary, the foliar-applied 450 ppm ZnO-NPs increased plant height (8.22%), total chlorophyll content (73.59%), ascorbic acid (21.39%), and DPPH activity (17.61%) and yield parameters; cob diameter (19.45%), and kernels numbers 6.35% enhanced compared to plants that were spiked only with Cd. The findings of the current study pave the way for safer and more cost-effective crop production in Cd-stressed soils by using green synthesized NPs and provide deep insights into the underlying mechanisms of NPs treatment at the molecular level to provide compelling evidence for the use of NPs in improving plant growth and yield.

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来源期刊
International Journal of Phytoremediation
International Journal of Phytoremediation 环境科学-环境科学
CiteScore
7.60
自引率
5.40%
发文量
145
审稿时长
3.4 months
期刊介绍: The International Journal of Phytoremediation (IJP) is the first journal devoted to the publication of laboratory and field research describing the use of plant systems to solve environmental problems by enabling the remediation of soil, water, and air quality and by restoring ecosystem services in managed landscapes. Traditional phytoremediation has largely focused on soil and groundwater clean-up of hazardous contaminants. Phytotechnology expands this umbrella to include many of the natural resource management challenges we face in cities, on farms, and other landscapes more integrated with daily public activities. Wetlands that treat wastewater, rain gardens that treat stormwater, poplar tree plantings that contain pollutants, urban tree canopies that treat air pollution, and specialized plants that treat decommissioned mine sites are just a few examples of phytotechnologies.
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