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Cao, Xiangmei; Duan, Wenyi; Wei, Chunyan; Chen, Kunsong; Grierson, Don; Zhang, Bo
Frontiers in plant science, 11/2019, Letnik: 10Journal Article
Carboxylesterases (CXE) and methylesterases (MES) are hydrolytic enzymes that act on carboxylic esters and are involved in plant metabolic processes and defense responses. A few functions of plant and genes have been identified but very little information is available about the role of most members. We made a comprehensive study of this gene family in a commercially important species, peach ( L. Batsch). A total of 33 peach genes and 18 genes were identified and shown to be distributed unevenly between the chromosomes. Based on phylogenetic analysis, CXEs and MESs clustered into two different branches. Comparison of the positions of intron and differences in motifs revealed the evolutionary relationships between and genes. RNA-seq revealed differential expression patterns of s in peach flower, leaf, and ripening fruit and in response to methyl jasmonate (MeJA) and ultraviolet B treatment. Transcript levels of candidate genes were verified by real-time quantitative PCR. Heterologous expression in identified three CXEs that were involved in the hydrolysis of volatile esters . Furthermore, two recombinant MES proteins were identified that could hydrolyze MeJA and methyl salicylate. Our results provide an important resource for the identification of functional and genes involved in the catabolism of volatile esters, responses to biotic and abiotic stresses and activation of signaling molecules such as MeJA and methyl salicylate.
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