AUTHOR=Dong Yating , Li Cong , Zhang Yi , He Qiuling , Daud Muhammad K. , Chen Jinhong , Zhu Shuijin 

TITLE=Glutathione S-Transferase Gene Family in Gossypium raimondii and G. arboreum: Comparative Genomic Study and their Expression under Salt Stress

JOURNAL=Frontiers in Plant Science

VOLUME=7

YEAR=2016

URL=https://www.frontiersin.org/journals/plant-science/articles/10.3389/fpls.2016.00139

DOI=10.3389/fpls.2016.00139

ISSN=1664-462X

ABSTRACT=<p>Glutathione S-transferases (GSTs) play versatile functions in multiple aspects of plant growth and development. A comprehensive genome-wide survey of this gene family in the genomes of <italic>G. raimondii</italic> and <italic>G. arboreum</italic> was carried out in this study. Based on phylogenetic analyses, the <italic>GST</italic> gene family of both two diploid cotton species could be divided into eight classes, and approximately all the <italic>GST</italic> genes within the same subfamily shared similar gene structure. Additionally, the gene structures between the orthologs were highly conserved. The chromosomal localization analyses revealed that <italic>GST</italic> genes were unevenly distributed across the genome in both <italic>G. raimondii</italic> and <italic>G. arboreum</italic>. Tandem duplication could be the major driver for the expansion of <italic>GST</italic> gene families. Meanwhile, the expression analysis for the selected 40 <italic>GST</italic> genes showed that they exhibited tissue-specific expression patterns and their expression were induced or repressed by salt stress. Those findings shed lights on the function and evolution of the <italic>GST</italic> gene family in <italic>Gossypium</italic> species.</p>