Red mesocarp, characterized as a unique pigment trait of newly identified Camellia drupifera cv. ‘Hongrou No.1’(‘HR’), is believed to act as the plant's protective shield against diverse adversities. Comprehensive metabolic profiling revealed that the ectopic deposition of polymeric insoluble proanthocyanidins (PAs) in cell walls is responsible for the “red” pigmentation of ‘HR’ mesocarps. Furthermore, structural equation modeling and variation partitioning analysis demonstrated that a molybdenum-dependent aldehyde oxidase, encoded by CdGLOX1, was induced in ‘HR’ mesocarps and deemed to be a dominant determinant of polymeric insoluble PA accumulation through the putative oxidative condensation of PA subunits. This study provides a background for an in-depth understanding of the mechanisms of unperceived pigmentation in fruits.

中文翻译：

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与红肉1号油茶中果皮红色色素沉着相关的高分子原花青素的代谢分析


红中果皮是新发现的山茶花 '红柔 1 号'（'HR'）的独特色素性状，被认为是该植物抵御各种逆境的保护盾。综合代谢分析显示，聚合物不溶性原花青素 （PAs） 在细胞壁中的异位沉积是导致“HR”中果皮“红色”色素沉着的原因。此外，结构方程建模和变异分配分析表明，由 CdGLOX1 编码的钼依赖性醛氧化酶在 'HR' 中果皮中被诱导，并被认为是聚合物不溶性 PA 积累的主要决定因素通过 PA 亚基的假定氧化缩合。本研究为深入了解水果中未察觉的色素沉着机制提供了背景。