Welcome to Acta Prataculturae Sinica ! Today is Share:

Acta Prataculturae Sinica ›› 2024, Vol. 33 ›› Issue (9): 111-125.DOI: 10.11686/cyxb2023393

Previous Articles    

Genome-wide analysis and expression of the OSCA family genes from Medicago truncatula in response to low temperature stresses

Hong-li CUI1(), Ming-zhe SUN1, Bo-wei JIA1,2(), Xiao-li SUN1()   

  1. 1.Crop Stress Molecular Biology Laboratory,Heilongjiang Bayi Agricultural University,Daqing 163319,China
    2.Key Laboratory of Germplasm Enhancement,Physiology and Ecology of Food Crops in Cold Region,Ministry of Education,Northeast Agricultural University,Harbin 150030,China
  • Received:2023-10-19 Revised:2023-11-29 Online:2024-09-20 Published:2024-06-20
  • Contact: Bo-wei JIA,Xiao-li SUN

Abstract:

Hyperosmolality-gated calcium-permeable channel (OSCA) is a class of hyperosmotic sensors. A total of 13 MtOSCAs genes were identified by searching the alfalfa (Medicago truncatula) genome, and named MtOSCA1.1-MtOSCA4.1 according to their homology with AtOSCAsMt here denotes M. truncatula, and At denotes Arabidopsis thaliana). Chromosomal location analysis showed that the 13 MtOSCA genes were unevenly distributed on the 8 chromosomes. Furthermore, the MtOSCA family was phylogenetically divided into four subfamilies, and members from each subfamily were conserved in terms of intron-exon organization. Conserved functional domains and conserved motifs further indicated high conservatism of the MtOSCA family during evolution. Collinearity analysis suggested that MtOSCAs were closely related to GmOSCAsGm denotes Glycine max), but far from AtOSCAs. Gene expression pattern analysis revealed that MtOSCAs from different subfamilies exhibited tissue specificity. The expression of MtOSCA2.5/2.6/3.1 was found to be dramatically up-regulated by low temperature stress through transcriptome data and qRT-PCR analysis. In addition, the promoter sequences of MtOSCAs contained numbers of light-, hormone-, and stress-responsive cis-elements. In conclusion, results presented in this study lay a solid foundation for functional characterization of MtOSCA genes in regulating alfalfa tolerance to environmental stress.

Key words: Medicago truncatula, OSCA gene family, genome-wide characterization, expression analysis