重金屬脅迫下白骨壤數(shù)字基因表達(dá)譜分析
[Abstract]:[objective] to study the changes of gene expression in white bone soil under heavy metal sewage stress at the transcriptional level, in order to reveal the mechanism of the response of white bone soil to heavy metal pollution stress. [methods] High throughput sequencing based digital gene expression profile (DGE) technique was used to analyze the transcriptional sequence of heavy metal sewage treatment group and control group. [results] compared with the control group, there were 10 459 differentially expressed genes in white bone soil treated with heavy metals, of which 8 685 genes were increased. The expression of most genes in heavy metal treated samples was greatly induced by. Me V cluster analysis. GO functional annotation showed that the differentially expressed genes were mainly located in chloroplasts and various membrane structures in cells. Involved in "cell metabolism", "combination and biosynthesis of cell components", "response to stimuli" and so on. Analysis of KEGG metabolic pathway showed that differentially expressed genes were distributed in 126 Pathways, involved in "ribosome", "photosynthesis", and so on. Glyoxylate metabolism, pyruvate metabolism, etc. Heavy metal stress also promoted the expression of key enzyme genes (r {calfyl pyrophosphatase (0009238) and flavonol synthase (0001833) in the biosynthesis of terpenoids and flavonoids, thus promoting the accumulation of active components in white bone soil. The expression of cytokinin hydrolase coding gene CKX7 (0057124) and lipid signal transduction component gene BSK (0043741) in Brassinoids were significantly induced to improve the adaptability of white bone soil to heavy metal stress. In addition, transcription factor analysis showed that b HLH,NAC,MYB-related and WRKY played an important role in heavy metal stress. Eight genes closely related to the response to environmental stimuli were selected and their differences in expression under heavy metal sewage stress were verified by qRT-PCR. The results were consistent with the results of digital gene expression profiling. The validity of differentially expressed gene data was confirmed. [conclusion] heavy metal treatment affects the expression of genes related to metabolism, photosynthesis, small molecule acid synthesis, hormone synthesis and signal transduction and secondary metabolite biosynthesis.
【作者單位】: 嶺南師范學(xué)院生命科學(xué)與技術(shù)學(xué)院;廣州基迪奧生物科技有限公司;
【基金】:廣東省林業(yè)科技創(chuàng)新項(xiàng)目(2013KJCX011-03;2015KJCX025) 國(guó)家級(jí)大學(xué)生創(chuàng)新創(chuàng)業(yè)訓(xùn)練計(jì)劃項(xiàng)目(201510579277) 湛江市熱帶特色資源植物技術(shù)開發(fā)重點(diǎn)實(shí)驗(yàn)室項(xiàng)目(2014A06008) 嶺南師范學(xué)院自然科學(xué)研究項(xiàng)目(LZL1507)
【分類號(hào)】:X173;Q943.2
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