Comprehensive analysis of B3 family genes in pearl millet ( Pennisetum glaucum ) and the negative regulator role of PgRAV-04 in drought tolerance.

Autor:	Wang YH; Department of Grassland Science, College of Forestry and Landscape Architecture, South China Agricultural University, Guangzhou, China.; Guangdong Engineering Research Center for Grassland Science, Guangzhou, China., Ye X; Department of Grassland Science, College of Forestry and Landscape Architecture, South China Agricultural University, Guangzhou, China.; Guangdong Engineering Research Center for Grassland Science, Guangzhou, China., Zhao BY; Department of Grassland Science, College of Forestry and Landscape Architecture, South China Agricultural University, Guangzhou, China.; Guangdong Engineering Research Center for Grassland Science, Guangzhou, China., Wang WJ; Department of Grassland Science, College of Forestry and Landscape Architecture, South China Agricultural University, Guangzhou, China., Zhou ZF; Department of Grassland Science, College of Forestry and Landscape Architecture, South China Agricultural University, Guangzhou, China., Zhang XQ; College of Food Science and Engineering, Foshan University, Foshan, China., Du J; Institute for Agricultural Biosciences, Oklahoma State University, Ardmore, OK, United States., Song JL; College of biology and chemistry, Minzu Normal University of Xingyi, Xingyi, China., Huang XL; Department of Grassland Science, College of Forestry and Landscape Architecture, South China Agricultural University, Guangzhou, China., Ouyang KX; Department of Grassland Science, College of Forestry and Landscape Architecture, South China Agricultural University, Guangzhou, China., Zhong TX; Department of Grassland Science, College of Forestry and Landscape Architecture, South China Agricultural University, Guangzhou, China.; Guangdong Engineering Research Center for Grassland Science, Guangzhou, China., Liao FX; Department of Grassland Science, College of Forestry and Landscape Architecture, South China Agricultural University, Guangzhou, China.
Jazyk:	angličtina
Zdroj:	Frontiers in plant science [Front Plant Sci] 2024 Jul 29; Vol. 15, pp. 1400301. Date of Electronic Publication: 2024 Jul 29 (Print Publication: 2024).
DOI:	10.3389/fpls.2024.1400301
Abstrakt:	Introduction: Members of the plant-specific B3 transcription factor superfamily play crucial roles in various plant growth and developmental processes. Despite numerous valuable studies on B3 genes in other species, little is known about the B3 superfamily in pearl millet. Methods and Results: Here, through comparative genomic analysis, we identified 70 B3 proteins in pearl millet and categorized them into four subfamilies based on phylogenetic affiliations: ARF, RAV, LAV, and REM. We also mapped the chromosomal locations of these proteins and analyzed their gene structures, conserved motifs, and gene duplication events, providing new insights into their potential functional interactions. Using transcriptomic sequencing and real-time quantitative PCR, we determined that most PgB3 genes exhibit upregulated expression under drought and high-temperature stresses, indicating their involvement in stress response regulation. To delve deeper into the abiotic stress roles of the B3 family, we focused on a specific gene within the RAV subfamily, PgRAV-04 , cloning it and overexpressing it in tobacco. PgRAV-04 overexpression led to increased drought sensitivity in the transgenic plants due to decreased proline levels and peroxidase activity. Discussion: This study not only adds to the existing body of knowledge on the B3 family's characteristics but also advances our functional understanding of the PgB3 genes in pearl millet, reinforcing the significance of these factors in stress adaptation mechanisms. Competing Interests: The reviewer KS declared a shared affiliation with the authors Y-HW, XY, B-YZ, W-JW, Z-FZ, X-LH, K-XO, T-XZ and F-XL to the handling editor at the time of review. The authors declare that the research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest. (Copyright © 2024 Wang, Ye, Zhao, Wang, Zhou, Zhang, Du, Song, Huang, Ouyang, Zhong and Liao.)
Databáze:	MEDLINE
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