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Sulfur nanoparticles mediated improvement of salt tolerance in wheat relates to decreasing oxidative stress and regulating metabolic activity
Physiology and Molecular Biology of Plants ( IF 3.5 ) Pub Date : 2020-11-04 , DOI: 10.1007/s12298-020-00899-8
Khalil M Saad-Allah 1 , Gehad A Ragab 1
Affiliation  

Salinity is a critical issue impairing the growth and productivity of most crop species through the mediated ionic and osmotic imbalances. As a way forward, the current study was tailored to elucidate the capacity of sulfur nanoparticles (SNPs) to amend salinity consequences on growth and physio-biochemical attributes of wheat. In a controlled experiment, wheat seeds were primed for 12 h with either 100 μM SNPs or deionized water then sown in plastic pots containing 5 kg clay-sand mixture (2:1 w/w). A week later, pots received NaCl (100 or 200 mM) as a sole treatment or in combination with SNPs and after three weeks the data of morph-bio-physiological traits were recorded. Salinity decreased growth rate, pigmentation, protein, amino acids, cysteine, ascorbate, flavonoids and phenolics content in wheat leaves. Plants pre-treated with 100 μM SNPs showed improved growth rate, pigmentation, nitrogen metabolism as well as non-enzymatic antioxidant contents as compared with salinized treatments. Neither salt nor SNP treatments affected photosynthetic performance rate (Fv/fm), however both treatments induced glutathione content. SNP treatment retrieved the undue excessive activities of catalase (CAT), peroxidase (POD), ascorbate peroxidase (APX), superoxide dismutase (SOD) and polyphenol oxidase (PPO) besides the increased level of proline caused by salt stress. Likewise, 100 μM SNPs rebalanced the declined nitrogen, phosphorus and potassium contents and decreased sodium uptake caused by salinity. On the whole, priming with 100 μM SNPs improved photosynthetic pigments, nitrogen metabolism, antioxidant status and ionic relations contributing to the enhancement of growth attributes in wheat under salinity.



中文翻译:

硫纳米颗粒介导的小麦耐盐性改善与降低氧化应激和调节代谢活性有关

盐度是通过介导的离子和渗透失衡影响大多数作物物种的生长和生产力的关键问题。作为前进的方向,当前的研究旨在阐明硫纳米粒子 (SNP) 修正盐度对小麦生长和生理生化属性的影响的能力。在对照实验中,小麦种子用 100 μM SNP 或去离子水引发 12 小时,然后播种在装有 5 kg 粘土砂混合物 (2:1 w/w) 的塑料盆中。一周后,盆接受 NaCl(100 或 200 mM)作为单独处理或与 SNP 组合,三周后记录形态-生物-生理性状的数据。盐分降低了小麦叶片中的生长速度、色素沉着、蛋白质、氨基酸、半胱氨酸、抗坏血酸、类黄酮和酚类物质的含量。与盐渍化处理相比,用 100 μM SNP 预处理的植物的生长速度、色素沉着、氮代谢以及非酶促抗氧化剂含量均有所提高。盐和 SNP 处理均不影响光合性能速率 (Fv/fm),但两种处理均诱导了谷胱甘肽含量。除了盐胁迫引起的脯氨酸水平升高外,SNP 处理还恢复了过氧化氢酶 (CAT)、过氧化物酶 (POD)、抗坏血酸过氧化物酶 (APX)、超氧化物歧化酶 (SOD) 和多酚氧化酶 (PPO) 的过度活性。同样,100 μM SNP 重新平衡了下降的氮、磷和钾含量,并减少了盐度引起的钠吸收。总体而言,用 100 μM SNP 启动可改善光合色素、氮代谢、

更新日期:2020-11-04
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