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Single-wall and multi-wall carbon nanotubes promote rice root growth by eliciting the similar molecular pathways and epigenetic regulation

机译:单壁和多壁碳纳米管通过引发相似的分子途径和表观遗传调控来促进水稻根系生长

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Organisms are constantly exposed to environmental stimuli and have evolved mechanisms of protection and adaptation. Various effects of nanoparticles (NPs) on crops have been described and some results confirm that NPs could enhance plant growth at the physiological and genetic levels. This study comparatively analysed the effect of carbon nanotubes (CNTs) on rice growth. The results showed that single-wall CNTs were located in the intercellular space while multi-wall CNTs penetrated cell walls in roots. CNTs could promote rice root growth through the regulation of expression of the root growth related genes and elevated global histone acetylation in rice root meristem zones. These responses were returned to normal levels after CNTs were removed from medium. CNTs caused the similar histone acetylation and methylation statuses across the local promoter region of the Cullin-RING ligases 1 (CRL1) gene and increased micrococcal nuclease accessibility of this region, which enhanced this gene expression. The authors results suggested that CNTs could cause plant responses at the cellular, genetic, and epigenetic levels and these responses were independent on interaction modes between root cells and CNTs.
机译:有机体不断受到环境刺激,并发展了保护和适应机制。已经描述了纳米颗粒(NPs)对农作物的各种作用,一些结果证实了NPs可以在生理和遗传水平上促进植物生长。这项研究比较分析了碳纳米管(CNTs)对水稻生长的影响。结果表明,单壁碳纳米管位于细胞间隙,而多壁碳纳米管穿透根部的细胞壁。碳纳米管可以通过调节根系生长相关基因的表达和提高水稻根系分生组织区的整体组蛋白乙酰化来促进水稻根系生长。从培养基中除去CNT后,这些反应恢复到正常水平。 CNT在Cullin-RING连接酶1(CRL1)基因的本地启动子区域内引起相似的组蛋白乙酰化和甲基化状态,并增加了该区域的微球菌核酸酶可及性,从而增强了该基因的表达。作者的结果表明,碳纳米管可以在细胞,遗传和表观遗传水平上引起植物反应,而这些反应与根细胞与碳纳米管之间的相互作用方式无关。

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