水稻幼苗响应氰化物胁迫的基因表达谱差异分析
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国家自然科学基金项目(U20A2086);郴州国家可持续发展议程创新示范区建设专项(2021SFQ26)


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    摘要:

    为筛选水稻参与氰化物胁迫响应的关键基因,采用Agilent4×44 K水稻全基因组芯片,分析了氰化钾和铁氰化钾胁迫下水稻幼苗叶片和根系的基因表达特征。结果表明:氰化钾和铁氰化钾处理下,从水稻根系中分别筛选到1841和3037个差异表达基因,从水稻叶片中分别筛选到734和1805个差异表达基因;氰化钾处理下,细胞壁代谢和抗逆相关的基因在根中显著上调表达;铁氰化钾处理下,水稻叶中解毒相关基因显著上调表达,说明氰化物能诱导水稻基因差异表达;与细胞解毒作用和抗逆相关的基因、与细胞壁和次生代谢途径相关的基因以及转录因子类基因的表达均显著上调,表明2种氰化物处理下水稻根系和叶片均可能通过调节其体内的一些代谢途径和一些酶的催化活性来应对氰化物的胁迫,积极诱导与防御相关的基因,并通过主动吸收和转运等代谢过程将氰化物代谢解毒,以降低对植物的伤害。

    Abstract:

    In order to screen out the key genes involved in the response of rice to cyanide stress and cyanide metabolism in rice plants, the gene expression characteristics of leaves and roots of rice seedlings under the stress of potassium cyanide and potassium ferricyanide were analyzed by Agilent 4×44 K rice genome chip. The results showed that 1841 and 3037 differentially expressed genes in rice roots and 734 and 1805 differentially expressed genes in rice leaves were found under potassium cyanide and potassium ferricyanide treatments, respectively. Under potassium cyanide treatment, the up-regulated expression multiples of genes related to cell wall metabolism and stress resistance in roots. Under potassium ferricyanide treatment, the up-regulated expression were the detoxification-related genes in rice leaves. The results showed that cyanide could induce the differential expression of genes in rice. There were great differences in the expression of genes related to detoxification and stress resistance, cell wall and secondary metabolic pathways and transcription factors. These results revealed detoxify cyanide metabolism through metabolic processes such as active absorption and transport to reduce plant damage. The roots and leaves of rice may serve the main organism for responsing to cyanide stress by self-regulation.

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张伏中,蔡青,宋江燕,胡龙兴,吴根义.水稻幼苗响应氰化物胁迫的基因表达谱差异分析[J].湖南农业大学学报:自然科学版,2022,48(5):.

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  • 在线发布日期: 2022-10-26
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