Liao Boyong, Huang Runsheng, Li Weimeng, Chen Huajie, Shen Haoye, Shen Hongjian, Su Yiting, Wang Min, Lai Weili, Li Yongquan, Zhang Bipei
College of Horticulture and Landscape Architecture, Zhongkai University of Agriculture and Engineering, Guangzhou, China.
College of Natural Resources and Environment, South China Agricultural University, Guangzhou, China.
Food Chem. 2025 Feb 15;465(Pt 2):142099. doi: 10.1016/j.foodchem.2024.142099. Epub 2024 Nov 17.
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.
红色中果皮是新鉴定的油茶（Camellia drupifera）品种‘红肉一号’（‘HR’）特有的色素性状，被认为是该植物抵御各种逆境的保护屏障。综合代谢谱分析表明，聚合不溶性原花青素（PAs）在细胞壁中的异位沉积是‘HR’中果皮“红色”色素沉着的原因。此外，结构方程模型和变异分配分析表明，由CdGLOX1编码的一种钼依赖性醛氧化酶在‘HR’中果皮中被诱导，并且被认为是通过PA亚基的推定氧化缩合作用而成为聚合不溶性PA积累的主要决定因素。本研究为深入了解果实中未被察觉的色素沉着机制提供了背景。
