生物技术通报 ›› 2015, Vol. 31 ›› Issue (11): 173-178.doi: 10.13560/j.cnki.biotech.bull.1985.2015.11.015

• 研究报告 • 上一篇    下一篇

miR319a及其靶基因在木薯中的低温响应分析

曾长英, 周玉飞, 彭明   

  1. 中国热带农业科学院热带生物技术研究所,海口 571101
  • 收稿日期:2015-05-15 出版日期:2015-11-26 发布日期:2015-11-26
  • 作者简介:曾长英,女,博士,研究方向: 木薯抗逆机理;E-mail: zengchangying@itbb.org.cn
  • 基金资助:
    国家“863”计划项目(2012AA101204-2),海南省自然科学基金项目(313075),海南省重大科技项目子课题(ZDZX2013023-1),中央级公益性科研院所基本科研业务费(ITBB2015RC01)

The Differential Expression Characteristics of miR319 and Four Targets Response to Low Temperature Treatments in Two Cassava Varieties

Zeng Changying, Zhou Yufei, Peng Ming   

  1. Institute of Tropical Bioscience and Biotechnology,Chinese Academy of Tropical Agricultural Sciences,Haikou 571101
  • Received:2015-05-15 Published:2015-11-26 Online:2015-11-26

摘要: 旨在探索miRNA在木薯低温逆境中的调控作用,前期小RNA测序筛选出miR319对低温显著响应,通过实时定量PCR方法分析miR319与其4个不同靶基因在两个木薯品种的4种低温处理下的差异表达情况。结果显示,miRNA与其靶基因在两个不同木薯品种间的响应不同,4个低温处理间的响应也不同,miRNA与各个靶基因的相关系数也不同。比较发现在C4中miR319a与3个靶基因(GSTU8除外)负相关性均好于SC124,处理之间在NAH中的负相关表现最典型,miR319与4个靶基因之间的相关系数从大到小的顺序为: MYB33>Unknown>TCP4>GSTU8,预示着MYB33和Unknown(021030m)两个靶基因在C4的NAH中是miR319a更为优先的调控目标。结果表明在木薯的低温逆境适应过程中miR319对MYB33和Unknown两个靶基因的调控作用值得深入研究。

关键词: miR319, 耐低温, 靶基因, 负向调控, 相关系数

Abstract: To study the regulation roles of microRNAs in cassava low temperature adaption, our early small RNA transcriptome profile identified miR319 response to low temperature in cassava. This study, we assayed the expression patterns of miR319 and its 4 different target genes between two cassava varieties under 4 low temperature treatments based on real-time quantitative polymerase chain reaction(PCR)technique. The results showed that the expression patterns of miR319a and its target genes differed in two different cassava varieties, differed among the four cryogenic treatments, and same to the correlation coefficients between microRNAs and four different target genes. After the comparison study, we found that the negative correlations between miR319 with three targets(MYB33, TCP4 and Unknown)are larger in C4 than those in SC124, and the NAH treatment has most typical negative correlation, and the order of negative correlation coefficients between miR319 and its target gene from large to small are: MYB33>Unknown>TCP4>GSTU8. All those data reveal that MYB33 and Unknown target(021030m)are priority target genes miR319 might execute its negative regulation under NAH treatment in C4, and thus the regulation of miR319 on MYB33 and unknown target in cassava low temperature adoption is worth in-depth study in the future.

Key words: miR319, chilling tolerance, targets, negative regulation, correlation coefficients