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Evolutionary Analysis of Respiratory Burst Oxidase Homolog (RBOH) Genes in Plants and Characterization of . | LitMetric

AI Article Synopsis

  • The study focuses on the respiratory burst oxidase homolog (RBOH) gene family, crucial for producing reactive oxygen species (ROS), which are important for plant development.
  • A bioinformatics analysis across 22 plant species identified 181 RBOH homologues, showing that RBOHs are mainly found in terrestrial plants, with increased numbers in angiosperms due to whole genome duplication.
  • The research also indicates that ZmRBOHs in maize respond significantly to abiotic stresses, particularly cold stress, and highlights the evolutionary conservation and functional diversity of RBOH genes across different plant species.

Article Abstract

The respiratory burst oxidase homolog (RBOH), as the key producer of reactive oxygen species (ROS), plays an essential role in plant development. In this study, a bioinformatic analysis was performed on 22 plant species, and 181 RBOH homologues were identified. A typical RBOH family was identified only in terrestrial plants, and the number of RBOHs increased from non-angiosperms to angiosperms. Whole genome duplication (WGD)/segmental duplication played a key role in RBOH gene family expansion. Amino acid numbers of 181 RBOHs ranged from 98 to 1461, and the encoded proteins had molecular weights from 11.1 to 163.6 kDa, respectively. All plant RBOHs contained a conserved NADPH_Ox domain, while some of them lacked the FAD_binding_8 domain. Plant RBOHs were classified into five main subgroups by phylogenetic analysis. Most RBOH members in the same subgroup showed conservation in both motif distribution and gene structure composition. Fifteen were identified in maize genome and were positioned in eight maize chromosomes. A total of three pairs of orthologous genes were found in maize, including /, / and /. A Ka/Ks calculation confirmed that purifying selection was the main driving force in their evolution. ZmRBOHs had typical conserved domains and similar protein structures. -element analyses together with the expression profiles of the genes in various tissues and stages of development suggested that ZmRBOH was involved in distinct biological processes and stress responses. Based on the RNA-Seq data and qRT-PCR analysis, the transcriptional response of genes was examined under various abiotic stresses, and most of genes were up-regulated by cold stress. These findings provide valuable information for further revealing the biological roles of genes in plant development and abiotic stress responses.

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Source
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC9965149PMC
http://dx.doi.org/10.3390/ijms24043858DOI Listing

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