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Abstract

Brassinosteroid signaling kinases (BSKs) are a class of plant-specific receptor-like cytoplasmic kinases that are integral to brassinosteroid (BR) signal transduction. In this study, bioinformatic methods were employed to identify the BSK gene family at the genomic level in Brassica napus. Phylogenetic analysis classified the 35 identified B. napus BSK genes proteins into eight distinct groups. These 35 identified BnaBSK genes were located on 17 oilseed rape chromosomes and 2 scaffolds, with five members on the C09 chromosome. These proteins contain typical putative kinase catalytic and tetratricopeptide repeats domains and predominantly exhibit acidic properties. The promoters of BnaBSK genes are enriched with numerous stress-induced cis-acting elements, particularly those induced by the hormone auxin and anoxia, suggesting a potential role for BnaBSK genes in modulating plant developmental and metabolism. The expression patterns of BnaBSK genes vary under multiple stress conditions, and some BnaBSKs genes demonstrate high expression levels throughout all tissues of oilseed rape throughout its growth and development phase, pointing to the BnaBSK genes contributing to the development of B. napus. This study investigates the potential roles of BnaBSKs in the growth, development, and stress response of B. napus.

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