IAA treatment accelerates post-harvest softening in 'Docteur Jules Guyot' pear via activation of pectinase-encoding genes

文献类型： 外文期刊

第一作者： Zhu, Xinxin

作者： Zhu, Xinxin;Zhang, Xin;Xu, Xiaofei;Zhang, Hongxia;Li, Jianzhao;Zhu, Xinxin;Zhang, Xin;Xu, Xiaofei;Li, Jianzhao;Jiang, Fudong;Li, Qingyu;Zhang, Hongxia;Zhang, Hongxia;Zhang, Aidi

作者机构：

关键词： European pear; Auxin; Pectin; Gene expression

期刊名称：SCIENTIA HORTICULTURAE （ 影响因子：4.2； 五年影响因子：4.6 ）

ISSN： 0304-4238

年卷期： 2025 年 341 卷

页码：

收录情况： SCI

摘要： 'Docteur Jules Guyot' pears (Pyrus communis L.) are harvested at a lower level of ripeness and must undergo a softening process before being ready for sale. The plant hormone auxin has varying effects across different species, however, the molecular mechanism by which auxin regulates the softening process of 'Docteur Jules Guyot' pear remains unclear. In this study, we treated post-harvest pear fruit with IAA and compared them with the control group. We observed that fruit firmness declined more rapidly in the IAA-treated group, with a corresponding rise in ethylene release compared to the control. Additionally, the IAA treatment increased both water-soluble and ionically soluble pectin while the content of covalently bound pectin decreased. This was accompanied by a significant enhancement in pectinase activity, in addition, through transcriptome analysis, we identified 15 pectinase-encoding genes and 16 candidate genes related to IAA. The results of gene expression and correlation analysis showed that IAA treatment induced the expression of PcGH3.1 and PcILL3, and these two genes exhibited a significant positive correlation with the pectinase encoding genes PcPG1, PcPG3, PcPL8, PcPL15, PcPL18, and PcPME63. Therefore, IAA treatment regulates the expression of multiple pectinase-encoding genes, which in turn enhances pectinase activity and accelerates the postharvest softening process in 'Docteur Jules Guyot' pear.

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