Systematic discovery and characterization of stress-related microRNA genes in Oryza sativa
文献类型: 外文期刊
作者: Xie, Kai Bin 1 ; Zhou, Xue 1 ; Zhang, Tian Hai 1 ; Zhang, Bao Long 3 ; Chen, Li Ming 4 ; Chen, Guo Xiang 1 ;
作者机构: 1.Nanjing Normal Univ, Coll Life Sci, Jiangsu Key Lab Biodivers & Biotechnol, Nanjing 210046, Jiangsu, Peoples R China
2.Nanjing Normal Univ, Taizhou Coll, Taizhou 225300, Peoples R China
3.Jiangsu Acad Agr Sci, Prov Key Lab Agrobiol, Nanjing 210014, Jiangsu, Peoples R China
4.Southeast Univ, Inst Life Sci, Key Lab Dev Genes & Human Dis, Minist Educ, Nanjing 210009, Jiangsu, Peoples R China
关键词: abiotic stresses;Oryza sativa;microRNAs;promoter;target genes
期刊名称:BIOLOGIA ( 影响因子:1.35; 五年影响因子:1.139 )
ISSN:
年卷期:
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收录情况: SCI
摘要: Abiotic stresses including drought, salinity, extreme temperatures, chemical toxicity and oxidative are the natural status of the environment to exert serious threats to agriculture. Abiotic stress-related microRNAs (ASmiRNAs) are a group of microRNAs (miRNAs) regulating stress responses in plants. However, the systematic investigation of ASmiRNAs is limited in Rice (O. sativa), a typical abiotic stress-resistant crop species. In the present work, we systematically investigated ASmiRNAs in silico. First, we identified 177 putative ASmiRNAs in O. sativa. Second, we found most ASmiRNAs were driven by TATA-promoter and most stress-related miRNA promoter regions contained the stress-related elements. Third, we found many ASmiRNAs families were species/family specific and a set of miRNAs might derive from genomic repeat-sequences in O. sativa. Finally, we found the ASmiRNAs in O. sativa target 289 genes with 1050 predicted target sites in which 98% sites have cleavage activity and 2% sites have translation inhibition activity. In conclusion, our findings provide an insight into both the function and evolution of ASmiRNAs and improve our understanding on the mechanism of abiotic stress resistance in O. sativa.
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