Comparative Analysis of B-BOX Genes and Their Expression Pattern Analysis Under Various Treatments in Dendrobium Officinale

Overview

Journal BMC Plant Biol

Publisher Biomed Central

Specialty Biology

Date 2019 Jun 12

PMID 31182022

Citations 24

Authors

Yunpeng Cao

Dandan Meng

Yahui Han

Tianzhe Chen

Chunyan Jiao

Yu Chen

Qing Jin

Yongping Cai

Affiliations

Soon will be listed here.

Abstract

Background: Studies have demonstrated that BBX (B-BOX) genes play crucial roles in regulatory networks controlling plant growth, developmental processes and stress response. Nevertheless, comprehensive study of BBX genes in orchids (Orchidaceae) is not well studied. The newly released genome sequences of Dendrobium officinale and Phalaenopsis equestris have allowed a systematic analysis of these important BBX genes in orchids.

Results: Here we identified 19 (DoBBX01-19) and 16 (PeBBX01-16) BBX genes from D. officinale and P. equestris, respectively, and clustered into five clades (I-V) according to phylogenetic analysis. Thirteen orthologous, two DoBBXs paralogous and two PeBBXs paralogous gene pairs were validated. This gene family mainly underwent purifying selection, but five domains experienced positive selection during evolution. Noteworthy, the expression patterns of root, root_tips, stem, leaf, speal, column, lip, and flower_buds revealed that they might contribution to the formation of these tissues. According to the cis-regulatory elements analysis of BBX genes, qRT-PCR experiments were carried out using D. officinale PLBs (protocorm-like bodies) and displayed that these BBX genes were differentially regulated under AgNO, MeJA (Methyl Jasmonate), ABA (abscisic acid) and SA (salicylic acid) treatments.

Conclusions: Our analysis exposed that DoBBX genes play significant roles in plant growth and development, and response to different environmental stress conditions of D. officinale, which provide aid in the selection of appropriate candidate genes for further functional characterization of BBX genes in plants.

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