|Table of Contents|

Effects of titanium ions on gene expression of Medicago sativa by comparative transcriptome analysis(PDF)

Chinese Journal of Applied & Environmental Biology[ISSN:1006-687X/CN:51-1482/Q]

Issue:
2019 01
Page:
117-127
Research Field:
Articles
Publishing date:

Info

Title:
Effects of titanium ions on gene expression of Medicago sativa by comparative transcriptome analysis
Author(s):
WEI Chunmei1 2 LUAN Wei1 2 DAI Ya1 WANG Mingxiu1 TAO Xiang1 WANG Yan1 LI Caixia1 & MA Xinrong1**
1 Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu 610041, China 2 University of Chinese Academy of Sciences, Beijing 100049, China
Keywords:
titanium ion Medicago sativa gene differential expression ribosomal protein heat shock protein pathogenesis-related gene WRKY gene
CLC:
S482.8
PACS:
DOI:
10.19675/j.cnki.1006-687x.2018.04028
DocumentCode:

Abstract:
Titanium ions promote plant growth and increase crop yield significantly, but the mechanism remains an enigma. In this study, we determined the effect of titanium ions on gene expression in Medicago sativa using Illumina high-throughput RNA-sequencing. After 24 h of foliar-sprayed with a titanium ion solution (0, 8 mg/L), the leaves of M. sativa were sampled for transcriptome sequencing. The resulting sequences were mapped onto the reference genome of Medicago truncatula, leading to the annotation of 28 437 genes. The differential expression analysis showed that 482 genes expressed differentially, including 247 up-regulated and 235 down-regulated upon 8 mg/L titanium ion solution compared with the control. Further analysis showed that the genes encoding ribosomal proteins (18), heat shock proteins (7) and transcription factor WRKYs (5) were mainly up-regulated. Although the number of up-regulated genes (11) associated with disease resistance was less than that of down-regulated ones (22), the total expression abundance of these genes increased from 12 563 to 16 197 FPKM. In addition, the down-regulated genes mainly included cytochrome P450 family genes (2 up-regulated, 7 down-regulated). It was speculated that titanium ions act as a stress signal to stimulate plants to respond, resulting in gene expression alterations that promote plant growth and improves the adaptability to adverse conditions. This study lays the foundation for revealing the regulatory mechanism of titanium ions on plant growth and provides a basis for its further application in agricultural production.

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Last Update: 2019-02-25