A genome-wide analysis of SWEET gene family in cotton and their expressions under different stresses

作者：Lanjie Zhao, Jinbo Yao, Wei Chen, Yan Li, Youjun Lü, Yan Guo, Junyi Wang, Yuan Li, Ziyang Liu, Yongshan Zhang · 发表于：Journal of Cotton Research · 年份：2018 · DOI：10.1186/s42397-018-0007-9 · 被引用次数：32 · 研究领域：Plant nutrient uptake and metabolism、Research in Cotton Cultivation、Plant Molecular Biology Research

The SWEET (Sugars will eventually be exported transporters) gene family plays multiple roles in plant physiological activities and development process. It participates in reproductive development and in the process of sugar transport and absorption, plant senescence and stress responses and plant-pathogen interaction. However, thecomprehensive analysis of SWEET genes has not been reported in cotton. In this study, we identified 22, 31, 55 and 60 SWEET genes from the sequenced genomes of Gossypium arboreum , G. raimondii, G. hirsutum and G. barbadense , respectively. Phylogenetic tree analysis showed that the SWEET genes could be divided into four groups, which were further classified into 14 sub-clades. Further analysis of chromosomal location, synteny analysis and gene duplication suggested that the orthologs showed a good collinearity and segmental duplication events played a crucial role in the expansion of the family in cotton. Specific MtN3_slv domains were highly conserved between Arabidopsis and cotton by exon-intron organization and motif analysis. In addition, the expression pattern in different tissues indicated that the duplicated genes in cotton might have acquired new functions as a result of sub-functionalization or neo-functionalization. The expression pattern of SWEET genes showed that the different genes were induced by diverse stresses. The identification and functional analysis of SWEET genes in cotton may provide more candidate genes for genetic modificati...