文献类型：期刊文献

英文题名：Expression profile of miRNAs in Populus cathayana L. and Salix matsudana Koidz under salt stress

作者：Zhou, Jing[1,2] Liu, Mingying[1,2] Jiang, Jing[1,2] Qiao, Guirong[1,2] Lin, Sheng[1] Li, Haiying[1,2] Xie, Lihua[1,2] Zhuo, Renying[1,2]

通信作者：Zhuo, RY[1]|[a00058eb5603bedf0c2e1]卓仁英;

机构：[1]Chinese Acad Forestry, State Key Lab Tree Genet & Breeding, Beijing 100091, Peoples R China;[2]Chinese Acad Forestry, Key Lab Tree Genom, Res Inst Subtrop Forestry, Hangzhou 311400, Zhejiang, Peoples R China

年份：2012

卷号：39

期号：9

起止页码：8645-8654

外文期刊名：MOLECULAR BIOLOGY REPORTS

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000306799700009)】；

基金：We would like to thank Dr. Han-Jiang Fu of the Academy of Military Medical Science and Dr. Zhangxun Wang of the Tongji University School of Medicine for their technical assistance. This work was supported by the National Natural Science Fundation of China (30972340) and Natural Science Fundation of Zhejiang Province (R3090070).

语种：英文

外文关键词：miRNA; Salt stress; Expression; Populus cathayana L.; Salix matsudana Koidz

摘要：Soil salinization can lead to environmental and ecological problems worldwide. Abiotic stressors, including salinity, are suspected to regulate microRNA (miRNA) expression. Plants exposed to such abiotic stressors express specific miRNAs, which are genes encoding small non-coding RNAs of 20-24 nucleotides. miRNAs are known to exist widely in plant genomes, and are endogenous. A previous study used miRNA microarray technology and poly(A) polymerase-mediated qRT-PCR technology to analyze the expression profile of miRNAs in two types of plants, Populus cathayana L. (salt-sensitive plants) and Salix matsudana Koidz (highly salinity-tolerant plants), both belonging to the Salicaceae family. miRNA microarray hybridization revealed changes in expression of 161 miRNAs P. cathayana and 32 miRNAs in S. matsudana under salt stress. Differences in expression indicate that the same miRNA has different expression patterns in salt-sensitive plants and salt-tolerant plants under salt stress. These indicate that changes in expression of miRNAs might function as a response to varying salt concentrations. To examine this, we used qRT-PCR to select five miRNA family target genes involved in plant responses to salt stress. Upon saline treatment, the expressions of both ptc-miR474c and ptc-miR398b in P. cathayana were down-regulated, but were up-regulated in S. matsudana. Expression of the miR396 family in both types of plants was suppressed. Furthermore, we have analyzed the different expression patterns between P. cathayana and S. matsudana. Findings of this study can be utilized in future investigations of post-transcriptional gene regulation in P. cathayana and S. matsudana under saline stress.