The difference of the cell wall metabolism between ‘Fuyan’ and ‘Dongbi’ longans and its relationship with the pulp breakdown

• DOI: 10.1016/j.crfs.2023.100496
• Publication Date: 2023-03-25T00:30:12Z
• Authors: Lijuan Lin; Yazhen Chen; Hetong Lin; Yixiong Lin; Zhongqi Fan; Hui Wang; Wangjin Lu; Jianye Chen; Yihui Chen; Yifen Lin
• Keywords: Nutrition. Foods and food supply; Cultivars; Cell wall-degrading enzymes; TX341-641; Gene expression; Longan fruit; Pulp breakdown; Cell wall polysaccharides; TP368-456; Food processing and manufacture

The aims of present works were to explore the difference in pulp breakdown of 'Fuyan' and 'Dongbi' longans and its relationship with cell wall metabolism. Comparison with 'Fuyan' longan fruit, postharvest 'Dongbi' longan fruit showed lower pulp breakdown index, lower activities of PE, PG, cellulase, β-Gal, XET, and lower expression levels of their corresponding genes. In addition, higher levels of cell wall polysaccharides including ISP, CSP, cellulose and hemicellulose were exhibited in 'Dongbi' longan pulp. These findings implied that, the reduced activities of enzymes and the down-regulated expressions of genes-involved in cell wall disassembly were shown in 'Dongbi' longan pulp, which might reduce the dissolution of polysaccharides and maintain a higher structural integrity in 'Dongbi' longan pulp cell wall, and consequently the mitigated pulp breakdown was displayed in 'Dongbi' longan during storage.