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Identification and Characterization of the APX Gene Family and Its Expression Pattern under Phytohormone Treatment and Abiotic Stress in Populus trichocarpa
Ist Teil von
Genes, 2021-02, Vol.12 (3), p.334
Ort / Verlag
Switzerland: MDPI
Erscheinungsjahr
2021
Quelle
EZB Electronic Journals Library
Beschreibungen/Notizen
Ascorbate peroxidase (APX) is a member of class I of the heme-containing peroxidase family. The enzyme plays important roles in scavenging reactive oxygen species for protection against oxidative damage and maintaining normal plant growth and development, as well as in biotic stress responses. In this study, we identified 11
genes in the
genome using bioinformatic methods. Phylogenetic analysis revealed that the PtrAPX proteins were classifiable into three clades and the members of each clade shared similar gene structures and motifs. The
genes were distributed on six chromosomes and four segmental-duplicated gene pairs were identified. Promoter
-elements analysis showed that the majority of
genes contained a variety of phytohormone- and abiotic stress-related
-elements. Tissue-specific expression profiles indicated that the
genes primarily function in roots and leaves. Real-time quantitative PCR (RT-qPCR) analysis indicated that
transcription was induced in response to drought, salinity, high ammonium concentration, and exogenous abscisic acid treatment. These results provide important information on the phylogenetic relationships and functions of the
gene family in
.