文献类型： 外文期刊

作者： Liu, J. ¹ ; Guo, X. ¹ ; Zhai, T. ¹ ; Shu, A. ³ ; Zhao, L. ¹ ; Liu, Z. ⁴ ; Zhang, S. ¹ ;

作者机构： 1.Shandong Agr Univ, Coll Life Sci, State Key Lab Crop Biol, Tai An 271018, Shandong, Peoples R China

2.Qilu Normal Univ, Inst Mol Breeding Maize, Jinan, Peoples R China

3.Jiangxi Acad Agr Sci, Rice Res Inst, Nanchang, Jiangxi, Peoples R China

4.Jiangxi Acad Agr Sci, Inst Soil & Fertilizer & Resource & Environm, Nanchang 330200, Jiangxi, Peoples R China

关键词： ABA; GA; maize; miRNA; seed germination

期刊名称：PLANT BIOLOGY （ 影响因子：3.081； 五年影响因子：2.972 ）

ISSN： 1435-8603

年卷期：

页码：

收录情况： SCI

摘要： MicroRNAs (miRNAs) are an important class of non-coding small RNAs that regulate the expression of target genes through mRNA cleavage or translational inhibition. Previous studies have revealed their roles in regulating seed dormancy and germination in model plants such asArabidopsis thaliana, rice (Oryza sativa) and maize (Zea mays). However, the miRNA response to exogenous gibberellic acid (GA) and abscisic acid (ABA) during seed germination in maize has yet to be explored. In this study, small RNA libraries were generated and sequenced from maize embryos treated with GA, ABA or double-distilled water as control. A total of 247 miRNAs (104 known and 143 novel) were identified, of which 45 known and 53 novel miRNAs were differentially expressed in embryos in the different treatment groups. In total, 74 (37 up-regulated and 37 down-regulated) and 55 (23 up-regulated and 32 down-regulated) miRNAs were expressed in response to GA and to ABA, respectively, and a total of 18 known and 38 novel miRNAs displayed differential expression between the GA- and ABA-treated groups. Using bioinformatics tools, we predicted the target genes of the differentially expressed miRNAs. Using GO enrichment and KEGG pathway analysis of these targets, we showed that miRNAs differentially expressed in our samples affect genes encoding proteins involved in the peroxisome, ribosome and plant hormonal signalling pathways. Our results indicate that miRNA-mediated gene expression influences the GA and ABA signalling pathways during seed germination.