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Widely targeted metabolite profiling of mango stem apex during floral induction by compond of mepiquat chloride, prohexadione-calcium and uniconazole

文献类型： 外文期刊

作者： Liang, Fei 1 ; Xu, Wentian 1 ; Wu, Hongxia 1 ; Zheng, Bin 1 ; Liang, Qingzhi 1 ; Li, Yingzhi 2 ; Wang, Songbiao 1 ;

作者机构： 1.Chinese Acad Trop Agr Sci, South Subtrop Crops Res Inst, Key Lab Trop Fruit Biol, Minist Agr, Zhanjiang, Peoples R China

2.Guangdong Ocean Univ, Binhai Agr Coll, Zhanjiang, Peoples R China

关键词： Mango; Floral induction; Metabolite; Lipid; Amino acid

期刊名称：PEERJ （ 影响因子：2.7； 五年影响因子：3.1 ）

ISSN： 2167-8359

年卷期： 2022 年 10 卷

页码：

收录情况： SCI

摘要： Background. Insufficient low temperatures in winter and soil residues caused by paclobutrazol (PBZ) application pose a considerable challenge for mango floral induction (FI). Gibberellin inhibitors SPD (compound of mepiquat chloride, prohexadionecalcium and uniconazole) had a significant influence on enhancing the flowering rate and yield of mango for two consecutive years (2020???2021). Researchers have indicated that FI is regulated at the metabolic level; however, little is known about the metabolic changes during FI in response to SPD treatment. tandem mass spectrometry (UPLC-ESI-MS/MS)-based widely targeted metabolomic analysis was carried out to assess the metabolic differences in the mango stem apex during different stage of mango FI (30, 80, 100 days after SPD/water treatment). Results. A total of 582 compounds were annotated and 372 metabolites showed two-fold differences in abundance (variable importance in projection, VIP > 1 and fold change, FC> 2 or??? 0.5) between buds at 30, 80, 100 days after SPD/water treatment or between buds under different treatment. Lipids, phenolic acids, amino acids, carbohydrates, and vitamins were among metabolites showing significant differences over time after SPD treatment. Here, 18 out of 20 lipids, including the lysophosphatidylethanolamine (12, LPE), lysophosphatidylcholine (7, LPC), and free fatty acids (1, FA), were significantly upregulated from 80 to 100 days after SPD treatment comared to water treatment. Meanwhile, the dormancy release of mango buds from 80 to 100 days after SPD treatment was accompanied by the accumulation of proline, ascorbic acid, carbohydrates, and tannins. In addition, metabolites, such as L-homocysteine, L-histidine, and L-homomethionine, showed more than a ten-fold difference in relative abundance from 30 to 100 days after SPD treatment, however, there were no significant changes after water treatment. The present study reveals novel metabolites involved in mango FI in response to SPD, which would provide a theoretical basis for utilizing SPD to induce mango flowering.

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