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Genome-wide identification and functional analysis of cupin_1 domain-containing members involved in the responses to and abiotic stress in . | LitMetric

AI Article Synopsis

  • Cupin_1 domain-containing proteins (CDPs) in plants play crucial roles in various biological processes, with this study identifying 96 BnCDPs and classifying them into six subfamilies based on phylogenetic analysis and gene structures.* -
  • The expansion of the CDP gene family is mainly due to whole-genome duplication and segmental duplication, with gene expression being closely linked to developmental processes and responses to biotic and abiotic stresses.* -
  • A genome-wide association study (GWAS) of germplasms identified key loci associated with stress resistance, highlighting two candidate genes that showed strong expression correlation during pathogen and stress responses, underscoring the significance of CDPs in plant adaptation.*

Article Abstract

Cupin_1 domain-containing proteins (CDPs) are ubiquitously present in higher plants, which are known to play essential roles in various biological processes. In this study, we carried out genome-wide characterization and systematic investigation of the genes in A total of 96 BnCDPs, including 71 germin-like proteins (GLPs; proteins with a single cupin_1 domain) and 25 CDP bicupins (proteins with two cupin_1 domains), were identified and clustered into six distinct subfamilies (I-VI) based on the phylogenic analysis, gene structure and motif distribution. Further analysis indicated that whole-genome duplication (WGD) and segmental duplication are main contributors to the species-specific expansion of the gene family, and all the duplicated genes subsequently underwent strong purification selection. The promoter region of showed enrichment of -regulatory elements associated with development, hormone and stress, as well as transcription factor binding sites, which validates the prediction that are widely involved in plant growth and biotic and abiotic stress responses. The in different subfamilies exhibited obvious differences in expression among 30 developmental tissues/stages of , implying that s may be involved in tissue- and stage-specific developmental processes. Similar trends in expression of most were observed under inoculation and four abiotic stresses (dehydration, cold, ABA and salinity), particularly the in subfamily I and III with single cupin_1 domain, revealing that are of great importance in the environmental adaption of . We then performed a genome-wide association study (GWAS) of 274 core germplasms on resistance and identified four significantly associated loci harboring five . The expression levels of two candidate genes, and , were significantly correlated with resistance. Their functional responses to multiple stages of inoculation and four abiotic stresses were further examined through qPCR. Overall, this study provides rich resources for research on the function and evolutionary playground of genes.

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Source
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC9377217PMC
http://dx.doi.org/10.3389/fpls.2022.983786DOI Listing

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