Scholarlink

<p>Internal cavity formation followed by gum-like substance (GM) accumulation is a frequent quality disorder in mature&#xa0;‘Fengtangli’&#xa0;plum fruits, but the underlying physiological and molecular processes remain unclear.&#xa0;Here, we integrated&#xa0;widely targeted metabolomics, transcriptomics, and hormone profiling&#xa0;of GM, cavity-adjacent flesh (CF), and normal flesh (NF).&#xa0;Both GM and CF predominantly accumulated a range of secondary metabolites involved in stress response, including flavonoids, phenolic acids, and terpenoids. Compared with NF, CF exhibited significant reduction of glucose and fructose, along with increased L-malic acid, tartaric acid, and maslinic acid, and decreased <i>cis</i>-aconitic acid and neochlorogenic acid. These changes suggest substantial carbon redistribution that may also influence flavor. Hormone measurements further revealed a coordinated shift of signaling pathways in CF, marked by&#xa0;reduced auxin (IAA), cytokinins (CKs), and gibberellins&#xa0;and by&#xa0;increased jasmonic acid, salicylic acid, and abscisic acid. Consistently, CF exhibited enhanced oxidative- and defense-associated responses, including&#xa0;higher peroxidase activity,&#xa0;increased lignin deposition, and accumulation of phenylpropanoid-derived compounds. Transcriptome analysis showed that differentially expressed genes in CF were implicated in&#xa0;hormone signal transduction,&#xa0;sugar metabolism, and&#xa0;phenylpropanoid/flavonoid pathways. Collectively, these results demonstrate that&#xa0;cavity formation in plum flesh triggers carbon reallocation, secondary metabolite enrichment, and activation of defense-related pathways, providing new insight into tissue adaptation following internal cracking and gum development.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Metabolic and transcriptional reprogramming during cavity formation and gum accumulation in plum flesh

  • 期刊论文

  • 出版模式：

    开放获取

  • 发表日期：

    2026年5月30日

查看全文
  • Weiwei Xie,
  • Chuangnan Zhong,
  • Haixin Huang,
  • Zhenfu Song,
  • Siling Zhong,
  • Yanfei Ao,
  • Yi Xiao,
  • Xing An,
  • Qianming Zheng,
  • Chaoyang Liu

摘要

Internal cavity formation followed by gum-like substance (GM) accumulation is a frequent quality disorder in mature ‘Fengtangli’ plum fruits, but the underlying physiological and molecular processes remain unclear. Here, we integrated widely targeted metabolomics, transcriptomics, and hormone profiling of GM, cavity-adjacent flesh (CF), and normal flesh (NF). Both GM and CF predominantly accumulated a range of secondary metabolites involved in stress response, including flavonoids, phenolic acids, and terpenoids. Compared with NF, CF exhibited significant reduction of glucose and fructose, along with increased L-malic acid, tartaric acid, and maslinic acid, and decreased cis-aconitic acid and neochlorogenic acid. These changes suggest substantial carbon redistribution that may also influence flavor. Hormone measurements further revealed a coordinated shift of signaling pathways in CF, marked by reduced auxin (IAA), cytokinins (CKs), and gibberellins and by increased jasmonic acid, salicylic acid, and abscisic acid. Consistently, CF exhibited enhanced oxidative- and defense-associated responses, including higher peroxidase activity, increased lignin deposition, and accumulation of phenylpropanoid-derived compounds. Transcriptome analysis showed that differentially expressed genes in CF were implicated in hormone signal transduction, sugar metabolism, and phenylpropanoid/flavonoid pathways. Collectively, these results demonstrate that cavity formation in plum flesh triggers carbon reallocation, secondary metabolite enrichment, and activation of defense-related pathways, providing new insight into tissue adaptation following internal cracking and gum development.