Morphological assessment of glutamate zerovalent iron nanoparticles by scanning electron microscopy and its combined effect with indole acetic acid on amelioration of lead toxicity in maize (Zea mays L.),Microscopy Research and Technique

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Morphological assessment of glutamate zerovalent iron nanoparticles by scanning electron microscopy and its combined effect with indole acetic acid on amelioration of lead toxicity in maize (Zea mays L.)
Microscopy Research and Technique ( IF 2.0 ) Pub Date : 2020-07-20 , DOI: 10.1002/jemt.23543
Saleha Saeed ₁ , Sami Ullah ₁ , Muhammad Nafees ₁ , Fatima Bibi ₁ , Rehman Ullah ₁

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Food safety is a priority issue for sustainable global development that can be affected by heavy metals, contributing to morbidity and even mortality in crop growth. Heavy metals often accumulate in the soil due to the use of extensive chemical fertilizers and pesticides; therefore, the current experiment was aimed to determine the effect of glutamate zerovalent iron nanoparticles (Glu‐ZVFeNPs) and indole acetic acid (IAA) on physiological mechanism of lead (Pb⁺²) stress tolerance at 4 and 8 ppm in Zea mays variety. Seeds of the selected variety were collected from Cereal Crop Research Institute Persabaq Nowshera and planted in earthen pots in triplicate in the greenhouse of the Botany Department of the University of Peshawar. Nanoparticles were analyzed via scanning electron microscopy and energy dispersive X‐ray analysis. Maximum growth responses were recorded from T12 (untreated + NPs + IAA), while minimum were recorded from T5 (8 ppm) indicating from the minimum amplitude of chlorophyll “a” and “b” contents, root length, shoot length, and root/shoot ratio. T5 (8 ppm) enhanced the values of osmolytes and antioxidant enzymes peroxidase and superoxide dismutase which has been ameliorated by the combined application of Glu‐ZVFeNPs + IAA, indicating that the plant may resist the toxic effects of heavy metal stress at high concentration. From the present study, we concluded that adverse result of Pb⁺² has been condensed by application of Glu‐ZVFeNPs + IAA treatment as compared to the foliar application of IAA and Glu‐ZVFeNPs individually.

中文翻译：

谷氨酸零价铁纳米粒子的扫描电镜形态学评估及其与吲哚乙酸联合对改善玉米铅毒性的影响（Zea mays L.）

食品安全是全球可持续发展的一个优先问题，重金属可能会影响它，导致作物生长中的发病率甚至死亡率。由于大量使用化肥和农药，重金属经常在土壤中积累；因此，本实验旨在确定谷氨酸零价铁纳米粒子 (Glu-ZVFeNPs) 和吲哚乙酸 (IAA) 对玉米中4 ppm 和 8 ppm铅 (Pb ⁺² ) 胁迫耐受的生理机制的影响品种。所选品种的种子从谷物作物研究所 Persabaq Nowshera 收集并种植在白沙瓦大学植物学系温室中的土盆中，一式三份。通过扫描电子显微镜和能量色散 X 射线分析对纳米颗粒进行了分析。从 T12（未处理 + NPs + IAA）记录最大生长反应，而从 T5（8 ppm）记录最小值，表明叶绿素“a”和“b”含量、根长、枝条长度和根/拍摄比例。T5 (8 ppm) 提高了渗透物和抗氧化酶过氧化物酶和超氧化物歧化酶的值，而通过 Glu-ZVFeNPs + IAA 的组合应用可以改善这种情况，表明植物可以抵抗高浓度重金属胁迫的毒性作用。与单独施用 IAA 和 Glu-ZVFeNPs 相比，通过施用 Glu-ZVFeNPs + IAA 处理可以浓缩⁺²。

更新日期：2020-07-20

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