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Copper nanowires as nanofertilizers for alfalfa plants: Understanding nano-bio systems interactions from microbial genomics, plant molecular responses and spectroscopic studies.
Science of the Total Environment ( IF 9.8 ) Pub Date : 2020-06-27 , DOI: 10.1016/j.scitotenv.2020.140572
Keni Cota-Ruiz 1 , Yuqing Ye 2 , Carolina Valdes 2 , Chaoyi Deng 3 , Yi Wang 1 , José A Hernández-Viezcas 1 , Maria Duarte-Gardea 4 , Jorge L Gardea-Torresdey 5
Affiliation  

The recent application of nano copper (Cu) compounds in the agrosystem has shown potential to improve the physiological performance and agronomical parameters of crops. We grew alfalfa (Medicago sativa) in potting mix amended with bulk, nano, and ionic Cu compounds at 80 and 280 mg Cu/kg; then, we evaluated plant performance at physiological and molecular levels. Plants treated with bulk/nano Cu presented better agronomical responses. The P and S content was reduced in bulk and ionic Cu-exposed plants, compared to controls (p ≤ .05). All Cu forms increased the content of Fe and Zn in roots and Fe in leaves, compared to controls (p ≤ .05). Leaf-superoxide dismutase expression was augmented ~27-fold and rubisco mRNA was unaffected in bulk/nano Cu-treated plants, compared to controls (p ≤ .05). Bulk/nano Cu incremented the relative abundance of microorganisms involved in the elemental uptake. These results indicate that nano Cu improved the physiology of alfalfa and can be considered as potential nanofertilizers.



中文翻译:

紫花苜蓿植物用铜纳米线作为纳米肥料:通过微生物基因组学,植物分子响应和光谱研究了解纳米生物系统的相互作用。

纳米铜(Cu)化合物在农业系统中的最新应用显示出改善作物生理性能和农艺参数的潜力。我们在紫花苜蓿(紫花苜蓿)中以80和280 mg Cu / kg的散装,纳米和离子型Cu化合物改良了盆栽混合物。然后,我们评估了植物在生理和分子水平上的表现。用散装/纳米铜处理的植物表现出更好的农学响应。P和S的含量在体积和离子的Cu-暴露植物降低,与对照组相比(p  ≤0.05)。与对照相比,所有形式的铜均增加了根中铁和锌的含量以及叶片中铁的含量(p ≤.05)。叶超氧化物歧化酶的表达增强〜27倍和Rubisco mRNA在散装不受影响/纳米的Cu-处理的植物,与对照相比(p  ≤0.05)。大块/纳米铜增加了参与元素吸收的微生物的相对丰度。这些结果表明,纳米铜改善了苜蓿的生理,可以被认为是潜在的纳米肥料。

更新日期:2020-07-03
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