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Genome-wide identification of the Brassinosteroid-signaling kinase (BSK) gene family in Brassica napus
Abstract
Brassinosteroid signaling kinases (BSKs) are a class of plant-specific receptor-like cytoplasmic kinases that are integral to brassinosteroid (BR) signal transduction. In Brassica napus, a total of 37 BnaBSK genes were identified and phylogenetically grouped into eight distinct groups. These genes were located on 17 chromosomes and 2 scaffolds, with 5 members clustered on the C09 chromosome. These proteins contain kinase domains and tetrapeptide repeats and predominantly exhibit acidic properties. The promoters of BnaBSK genes are enriched with stress-responsive cis-elements, particularly those induced by the hormone auxin and anoxia, suggesting a potential role in modulating plant development and metabolism. The expression patterns of BnaBSK genes vary under multiple stress conditions, and several members demonstrate high expression levels across all tissues of oilseed rape throughout its development phase, pointing to the BnaBSK genes contributing to the growth and adaptation. This study investigates the potential roles of BnaBSKs in the growth, development, and stress response of B. napus.
