Genome-wide Analysis of MYB Transcription Factor Family and AsMYB1R Subfamily Contribution to ROS Homeostasis Regulation in Avena Sativa Under PEG-induced Drought Stress

Overview

Journal BMC Plant Biol

Publisher Biomed Central

Specialty Biology

Date 2024 Jul 5

PMID 38970019

Authors

Yang Chen

Aixue Li

Ping Yun

Quan Chen

Dayu Pan

Rui Guo

Han Zhang

Hassan Ahmed Ibraheem Ahmed

Haiying Hu

Yuanying Peng

Cheng Wang

Hongtu Dong

Chaoyang Qiu

Lana Shabala

Sergey Shabala

Bin Luo

Peichen Hou

Affiliations

Soon will be listed here.

Abstract

Background: The myeloblastosis (MYB) transcription factor (TF) family is one of the largest and most important TF families in plants, playing an important role in a life cycle and abiotic stress.

Results: In this study, 268 Avena sativa MYB (AsMYB) TFs from Avena sativa were identified and named according to their order of location on the chromosomes, respectively. Phylogenetic analysis of the AsMYB and Arabidopsis MYB proteins were performed to determine their homology, the AsMYB1R proteins were classified into 5 subgroups, and the AsMYB2R proteins were classified into 34 subgroups. The conserved domains and gene structure were highly conserved among the subgroups. Eight differentially expressed AsMYB genes were screened in the transcriptome of transcriptional data and validated through RT-qPCR. Three genes in AsMYB2R subgroup, which are related to the shortened growth period, stomatal closure, and nutrient and water transport by PEG-induced drought stress, were investigated in more details. The AsMYB1R subgroup genes LHY and REV 1, together with GST, regulate ROS homeostasis to ensure ROS signal transduction and scavenge excess ROS to avoid oxidative damage.

Conclusion: The results of this study confirmed that the AsMYB TFs family is involved in the homeostatic regulation of ROS under drought stress. This lays the foundation for further investigating the involvement of the AsMYB TFs family in regulating A. sativa drought response mechanisms.

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