MaMYBR30 , a Novel 1R-MYB, Plays Important Roles in Plant Development and Abiotic Stress Resistance

• Published in: Plants (Basel) Vol. 13; no. 13; p. 1794
• Main Authors: Liu, Li, Li, Shan, Tang, Fengjuan, Li, Peijun, Liu, Jiaxin, Fu, Rumeng, Zheng, Longyan, Zhang, Jie, Chao, Nan
• Format: Journal Article
• Language: English
• Published: Switzerland MDPI AG 28.06.2024
• Subjects: Abiotic stress; Biocompatibility; co-expression; Conserved sequence; Disease resistance; Drought; drought stress; Epigenetics; Flowering; Gene expression; Genes; ion toxicity; Leaves; Localization; Molecular modelling; MYB transcription factor; Network analysis; Phylogenetics; Salinity tolerance; salt stress; Salts; Sequence analysis; Signal transduction; Subgroups; Toxicity; Transcription factors; co-expression; salt stress; drought stress; MYB transcription factor; ion toxicity
• ISSN: 2223-7747; 2223-7747
• DOI: 10.3390/plants13131794

The V-myb myeloblastosis viral oncogene homolog (MYB) family participate in various bioprocesses including development and abiotic stress responses. In the present study, we first report a 1R SHAQKYF-class MYB, , in mulberry. Subcellular localization and sequence analysis indicated is located in the nucleus and belongs to a CCA-like subgroup with a conserved SHAQKYF motif. Expression profile analysis showed that is expressed in leaves and can be induced by drought and salt stress. The down-regulation of using virus-induced gene silence (VIGS) in mulberry and the overexpression of in were induced to explore the function of . The functional characterization of in vivo indicated that can positively regulate the resistance of mulberry to drought while negatively regulating the resistance of mulberry to salt stress. In addition, also affects flower development and reproductive growth, especially after exposure to salt stress. Weighted gene co-expression network analysis (WGCNA) primarily revealed the possible genes and signal pathways that are regulated by . Our results also imply that complex molecular mechanisms mediated by , including crosstalk of ion toxicity, phytohormone signal transduction, flowering development, and epigenetic modification, need to be further explored in the future.