Acta Agriculturae Zhejiangensis ›› 2022, Vol. 34 ›› Issue (6): 1124-1132.DOI: 10.3969/j.issn.1004-1524.2022.06.03

• Crop Science • Previous Articles     Next Articles

Bioinformatics of Huipizhi Black soybean GmPUB24 and expression under Heterodera glycines infection

LI Wenchen(), LIU Xin, QI Zezheng, YU Lu, WANG Fang()   

  1. College of Life Sciences and Agroforestry, Qiqihar University, Qiqihar 161006, Heilongjiang, China
  • Received:2021-08-21 Online:2022-06-25 Published:2022-06-30
  • Contact: WANG Fang

Abstract:

In order to clarify the mechanism of soybean U-box E3 ubiquitin ligase mediating plant disease resistance, coding sequence (CDS) of GmPUB24 gene from resistant cultivar Huipizhi black bean was cloned by RT-PCR. Bioinformatics and expression analysis of this gene after inoculation with soybean cyst nematode were carried out. The results showed that the length of CDS was 1 254 bp, encoded a total of 417 amino acids with a molecular weight of 46.78 ku. Protein secondary structure analysis showed that the protein encoded by GmPUB24 contained alpha helix, random coil, extended chain and beta turn, and the alpha helix accounted for the highest proportion of 58.9%. Protein encoded by GmPUB24 gene was a hydrophilic protein without transmembrane domain and signal peptide. Protein phylogenetic tree displayed that it had the highest affinity with wild soybean. Subcellular location predicted that it localized in the cytoplasm. Promoter analysis of 1 500 bp upstream of GmPUB24 gene showed that it contained CGTCA-motif, TGACG-motif and other elements that respond to disease resistance pathways, as well as ABRE, WUN-motif, TATA-box and other corresponding abiotic stress elements. Quantitative real-time PCR (qRT-RCR) results showed that the expression of GmPUB24 was induced by soybean cyst nematode, and the highest expression level in roots was 6.14 times compared with the uninoculated sample on the third day, indicating that GmPUB24 gene was induced by soybean cyst nematode and might be involved in the process of soybean defense against cyst nematode. These results provided a basis for clarifying the regulatory mechanism of soybean U-box family gene in resistance to soybean cyst nematode disease.

Key words: soybean, cloning, promoter, bioinformatics, expression

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