The profiling of phytohormone levels with developmental progression in dormant floral buds in peach varieties of differing chilling requirements

文献类型： 外文期刊

第一作者： Yan, Juan

作者： Yan, Juan;Li, Jiyao;Sun, Meng;Cai, Zhixiang;Zhang, Binbin;Xu, Jianlan;Ma, Ruijuan;Yu, Mingliang;Shen, Zhijun;Li, Jiyao

作者机构：

关键词： Chilling requirement; Dormancy; Jasmonic acid; Peach; Phytohormones

期刊名称：HORTICULTURE ENVIRONMENT AND BIOTECHNOLOGY （ 影响因子：2.4； 五年影响因子：2.4 ）

ISSN： 2211-3452

年卷期： 2025 年

页码：

收录情况： SCI

摘要： Phytohormones are known to have important regulatory roles in floral bud dormancy. Comparative metabolomics (LC-MS/MS) was used to examine the profiles of phytohormones during peach floral bud dormancy and demonstrated significant differences between the low and high chilling requirement (CR) peach varieties, 'Changlvmaotao1' and 'Jinxiu', respectively. Of the 88 phytohormones tested, 70 were detected in floral buds, but 44 were present in levels above threshold detection limits. Most hormones levels were relatively low or static during endodormancy, with only six showing significant changes, including jasmonic acid (JA) and its derivatives, jasmonoyl-L-isoleucine (JA-ILE) and N-[(-)-Jasmonoyl]-(L)-valine (JA-Val), 1-Aminocyclopropanecarboxylic acid, abscisic acid, 1-amino-cyclopropane-1-carboxylic acid and the gibberellin, GA53. However, 28 significant changes were observed in ecodormancy, including auxins, cytokinins and salicylic acid. The levels of JA and its derivatives, JA-ILE and JA-Val, all showed differential levels throughout dormancy, suggesting their important and diverse roles in the regulation of dormancy. The varieties of differing CR showed substantially differing phytohormone profiles during endo- and eco-dormancy, including 6-Benzyladenosine, L-tryptophan, 3-oxo-2-(2-(Z)-Pentenyl) cyclopentane-1-hexanoic acid, cis(+)-12-Oxophytodienoic acid, 3-oxo-2-(2-(Z)-Pentenyl) cyclopentane-1-butyric acid, and gibberellin GA1. Our preliminary findings indicate hormones and related metabolites which are likely to have regulatory roles in the maintenance or progression of bud dormancy in peach varieties of differing CR and which are therefore promising targets for further study and as physiological markers in peach breeding efforts.

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