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Comprehensive Identification of the β-Amylase (BAM) Gene Family in Response to Cold Stress in White Clover

文献类型： 外文期刊

作者： Li, Manman 1 ; Chen, Xiuhua 2 ; Huang, Wangqi 3 ; Wu, Kaiyue 1 ; Bai, Yan 1 ; Guo, Donglin 1 ; Guo, Changhong 1 ; Shu, Yongjun 1 ;

作者机构： 1.Harbin Normal Univ, Coll Life Sci & Technol, Key Lab Mol Cytogenet & Genet Breeding Heilongjian, Harbin 150025, Peoples R China

2.Yunnan Acad Agr Sci, Int Agr Res Inst, Kunming 650200, Peoples R China

3.Yunnan Acad Agr Sci, Flower Res Inst, Natl Engn Res Ctr Ornamental Hort, Yunnan Flower Breeding Key Lab, Kunming 650200, Peoples R China

关键词： white clover; BAM; cold stress; genetic regulation network; qRT-PCR

期刊名称：PLANTS-BASEL （ 影响因子：4.5； 五年影响因子：4.8 ）

ISSN： 2223-7747

年卷期： 2024 年 13 卷 2 期

页码：

收录情况： SCI

摘要： White clover (Trifolium repens L.) is an allopolyploid plant and an excellent perennial legume forage. However, white clover is subjected to various stresses during its growth, with cold stress being one of the major limiting factors affecting its growth and development. Beta-amylase (BAM) is an important starch-hydrolyzing enzyme that plays a significant role in starch degradation and responses to environmental stress. In this study, 21 members of the BAM gene family were identified in the white clover genome. A phylogenetic analysis using BAMs from Arabidopsis divided TrBAMs into four groups based on sequence similarity. Through analysis of conserved motifs, gene duplication, synteny analysis, and cis-acting elements, a deeper understanding of the structure and evolution of TrBAMs in white clover was gained. Additionally, a gene regulatory network (GRN) containing TrBAMs was constructed; gene ontology (GO) annotation analysis revealed close interactions between TrBAMs and AMY (alpha-amylase) and DPE (4-alpha-glucanotransferase). To determine the function of TrBAMs under various tissues and stresses, RNA-seq datasets were analyzed, showing that most TrBAMs were significantly upregulated in response to biotic and abiotic stresses and the highest expression in leaves. These results were validated through qRT-PCR experiments, indicating their involvement in multiple gene regulatory pathways responding to cold stress. This study provides new insights into the structure, evolution, and function of the white clover BAM gene family, laying the foundation for further exploration of the functional mechanisms through which TrBAMs respond to cold stress.

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