文献类型： 外文期刊

作者： Song, Huifang ¹ ; Wang, Mingyang ² ; Shen, Jie ¹ ; Wang, Xi ¹ ; Qin, Cheng ¹ ; Wei, Peipei ¹ ; Niu, Yaojun ¹ ; Ren, Jiahong ¹ ; Pan, Xiaoxue ³ ; Liu, Ake ¹ ;

作者机构： 1.Changzhi Univ, Dept Life Sci, Changzhi 046011, Peoples R China

2.Shanxi Normal Univ, Sch Life Sci, Taiyuan 030031, Peoples R China

3.Chongqing Acad Agr Sci, Chongqing Key Lab Advers Agr, Biotechnol Res Inst, Chongqing 401329, Peoples R China

关键词： Sunflower; Cold stress; Physiological index; Transcriptomics; Transcription factor

期刊名称：GENOMICS （ 影响因子：3.0； 五年影响因子：3.3 ）

ISSN： 0888-7543

年卷期： 2024 年 116 卷 5 期

页码：

收录情况： SCI

摘要： During sunflower growth, cold waves often occur and impede plant growth. Therefore, it is crucial to study the underlying mechanism of cold resistance in sunflowers. In this study, physiological analysis revealed that as cold stress increased, the levels of ROS, malondialdehyde, ascorbic acid, and dehydroascorbic acid and the activities of antioxidant enzymes increased. Transcriptomics further identified 10,903 DEGs between any two treatments. Clustering analysis demonstrated that the expression of MYB44a, MYB44b, MYB12, bZIP2 and bZIP4 continuously upregulated under cold stress. Cold stress can induce ROS accumulation, which interacts with hormone signals to activate cold-responsive transcription factors regulating target genes involved in antioxidant defense, secondary metabolite biosynthesis, starch and sucrose metabolism enhancement for improved cold resistance in sunflowers. Additionally, the response of sunflowers to cold stress may be independent of the CBF pathway. These findings enhance our understanding of cold stress resistance in sunflowers and provide a foundation for genetic breeding.