Genome-wide characterization of protein phosphatase 2C genes in Populus euphratica and their expression profiling under multiple abiotic stresses

作   者：李建波,贾会霞, 张进, 孙敬爽, 张永安,卢孟柱,辛学兵,胡建军
期刊名称：Tree Genetics & Genomes
影响因子：1.829
卷 期 号：14:80
页     码：
关键词：Populus euphratica . Protein phosphatase 2C (PP2C) . Phylogenetic analysis . Expression profiling . Abiotic stress
论文摘要：
Abstract
The protein phosphatase 2Cs (PP2Cs) have been demonstrated to act as negative modulators of protein kinase and to participate
in stress signal transduction, as well as plant growth and productivity processes. Populus euphratica is so extraordinarily
adaptable to abiotic stresses that it is regarded as a potential model plant for exploring resistance mechanisms of woody plants.
To gain insight into the functional characteristics of PP2C genes in P. euphratica, 117 non-redundant PeuPP2C-encoding genes
were identified from the whole genome. These members were classified into 13 groups (A–M), each of which was relatively
conserved in gene structure and protein domain. A total of 39 paralogous pairs were found to be generated by whole genome
duplication events, and Ka/Ks analysis indicated that these paralogous pairs had evolved mainly from purifying selection. The
cis-acting elements and expression patterns showed that all the PeuPP2Cs were involved in response to single or multiple stresses
including drought, salinity, heat, cold, and ABA. Taken together, our results summarized the genome-wide characterization of
PeuPP2Cs and their expression profiling across different tissues and under multiple abiotic stresses in P. euphratica. These data
provide a foundation to further investigate potential function of PeuPP2Cs in conferring tolerance to various stresses in
P. euphratica.