Expression partitioning of homeologs and tandem duplications contribute to salt tolerance in wheat (Triticum aestivum L.)

Scientific Reports
Yumei ZhangMingming Xin

Abstract

Salt stress dramatically reduces crop yield and quality, but the molecular mechanisms underlying salt tolerance remain largely unknown. To explore the wheat transcriptional response to salt stress, we performed high-throughput transcriptome sequencing of 10-day old wheat roots under normal condition and 6, 12, 24 and 48 h after salt stress (HASS) in both a salt-tolerant cultivar and salt-sensitive cultivar. The results demonstrated global gene expression reprogramming with 36,804 genes that were up- or down-regulated in wheat roots under at least one stress condition compared with the controls and revealed the specificity and complexity of the functional pathways between the two cultivars. Further analysis showed that substantial expression partitioning of homeologous wheat genes occurs when the plants are subjected to salt stress, accounting for approximately 63.9% (2,537) and 66.1% (2,624) of the homeologous genes in 'Chinese Spring' (CS) and 'Qing Mai 6' (QM). Interestingly, 143 salt-responsive genes have been duplicated and tandemly arrayed on chromosomes during wheat evolution and polyploidization events, and the expression patterns of 122 (122/143, 85.3%) tandem duplications diverged dynamically over the time-course of sa...Continue Reading

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Apr 8, 2017·The Plant Journal : for Cell and Molecular Biology·Artem S KasianovAleksey A Penin
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Datasets Mentioned

BETA
SRP062745

Methods Mentioned

BETA
salt stress
RNA-seq
Illumina sequencing
transgenic
environmental stresses
environmental stress
PCA
PCR

Software Mentioned

Illumina pipeline
Cluster
TreeView
IWGSC
BLASTN
R
Bowtie2
SIMILAR RCD - ONE
FastQC

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