文献类型： 外文期刊

作者： Luo, Yin ¹ ; Wang, Jin ² ; Ren, Chaohui ³ ; Chen, Yaqian ¹ ; Yang, Shimei ⁴ ; Yin, Qinbiao ² ; Wang, Meiqi ² ; Sui, Xiaoyan ² ; Tian, Hao ³ ; Liu, Feng ² ; Zou, Xuexiao ¹ ;

作者机构： 1.Hunan Univ, Coll Biol, Longping Branch, Changsha 410125, Peoples R China

2.Hunan Agr Univ, Coll Hort, Engn Res Ctr Educ, Key Lab Vegetable Biol Hunan Prov,Minist Germplasm, Changsha 410128, Peoples R China

3.Zunyi Acad Agr Sci, Zunyi 563006, Peoples R China

4.Guizhou Acad Agr Sci, Guiyang 550025, Peoples R China

关键词： pepper; Gibberellin; Gibberellin 20-oxidase; flower development; gene expression; CazGA20oxs

期刊名称：HORTICULTURAE （ 影响因子：3.0； 五年影响因子：3.2 ）

ISSN：

年卷期： 2025 年 11 卷 5 期

页码：

收录情况： SCI

摘要： Environmental temperature significantly affects plant growth and development, particularly flower development. In pepper (Capsicum annuum), the molecular mechanisms underlying temperature-mediated floral organ development remain unclear. Gibberellins (GAs) are key plant hormones regulating growth and development, including flower development, and the CaGA20ox gene family may play a crucial role in this process due to its involvement in GA biosynthesis. In this study, we comprehensively analyzed the CaGA20ox gene family across six pepper genomes ('Zhangshugang', 'Zunla', 'Chiltepin', 'CM334', 'Ca59', and 'T2T') to explore their roles in flower development and temperature stress response, identifying five to six genes per genome. These genes exhibited distinct expression patterns across different tissues and developmental stages, with some members showing higher expression in specific floral organs, particularly pistils. Our results revealed that temperature significantly impacts pepper flower development and GA content, with lower temperatures enhancing antioxidant capacity and increasing GA levels. Specifically, the expression levels of four CazGA20ox genes (CazGA20ox1, CazGA20ox2, CazGA20ox4, and CazGA20ox6) were significantly influenced by temperature changes. Our systematic analysis of the role of the CaGA20ox gene family in temperature-mediated pepper flower development provides a foundation for further studies on the molecular mechanisms as well as the development of improved pepper varieties.