木质素
生物
梨
转录组
苯丙素
代谢组学
细胞壁
植物
苯丙氨酸
生物合成
生物化学
基因
基因表达
生物信息学
氨基酸
作者
Xin Gong,Kaijie Qi,Juanli Chen,Liangyi Zhao,Zhihua Xie,Xin Yan,Shahrokh Khanizadeh,Shaoling Zhang,Shutian Tao
出处
期刊:Plant Journal
[Wiley]
日期:2023-01-19
卷期号:113 (3): 626-642
被引量:11
摘要
Stone cells are the brachysclereid cells in pear (Pyrus) fruit, consisting almost entirely of lignified secondary cell walls. They are distributed mainly near the fruit core and spread radially in the whole fruit. However, the development of stone cells has not been comprehensively characterized, and little is known about the regulation of stone cell formation at the transcriptomic, proteomic, and metabolomic levels. In the present study, we performed phenomic analysis on the stone cells and their associated vascular bundles distributed near the fruit cores. Transcriptomic, proteomic, and metabolomic analyses revealed a significant positive regulation of biological processes which contribute to the lignification and lignin deposition in stone cells near the fruit core, including sucrose metabolism and phenylalanine, tyrosine, tryptophan, and phenylalanine biosynthesis. We found many metabolites generated from the phenylpropanoid pathway contributing to the cell wall formation of stone cells near the fruit core. Furthermore, we identified a key transcription factor, PbbZIP48, which was highly expressed near the fruit core and was shown to regulate lignin biosynthesis in stone cells. In conclusion, the present study provides insight into the mechanism of lignified stone cell formation near the pear fruit core at multiple levels.
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