文献类型：期刊文献

英文题名：Transcriptome reveals carbon metabolite biosynthesis profiles related to culm solidification in Phyllostachys heteroclada f. solida

作者：Tan, Fei[1] Guo, Ziwu[1] Hu, Ruicai[2] Fan, Lili[1] Chen, Shuanglin[1]

第一作者：Tan, Fei

通信作者：Fan, LL[1]

机构：[1]Chinese Acad Forestry, Res Inst Subtrop Forestry, Hangzhou, Zhejiang, Peoples R China;[2]Longyou Cty Forestry Technol Extens Stn, Quzhou, Zhejiang, Peoples R China

年份：2025

卷号：262

期号：6

外文期刊名：PLANTA

收录：;Scopus(收录号：2-s2.0-105020283668);WOS:【SCI-EXPANDED(收录号:WOS:001603599700001)】；

基金：This work was supported by "Fundamental Research Funds of the Chinese Academy of Forestry "(CAFYBB2022SY013).

语种：英文

外文关键词：Phyllostachys heteroclada f. solida; Culm morphology; Carbon metabolism; Starch-sucrose metabolism; Phenylpropanoid biosynthesis; Transcriptome

摘要：This study aims to elucidate the mechanisms of carbon metabolism regulation involved in the solidification of bamboo culms in Phyllostachys heteroclada f. solida. Differentially expressed genes (DEGs) between Ph. heteroclada f. solida and hollow-stemmed variant Ph. heteroclada were identified by transcriptome sequencing. Enrichment analysis of GO and KEGG pathways revealed pronounced divergence in starch-sucrose metabolism and phenylpropanoid biosynthesis pathways. Key starch enzyme genes (e.g., PYG and AMY) were downregulated, while genes involved in sucrose metabolism (e.g., INV and SUS) were upregulated in Ph. heteroclada f. solida. Concurrently, lignin biosynthesis genes (e.g., PAL, C4H, and 4CL) were downregulated, whereas genes associated with cell wall synthesis substances such as pectin and cellulose were upregulated. Non-structural carbohydrate accumulation in Ph. heteroclada f. solida was consistent with these gene expression patterns. The study identified key differences in carbon metabolism pathways between Ph. heteroclada f. solida and Ph. heteroclada, demonstrating that the regulation of carbon metabolism genes plays an important role in culm solidification. These findings provide a foundational understanding of the molecular mechanisms underlying bamboo stem variation and offer insights for future bamboo breeding efforts.