文献类型： 外文期刊
作者： Zhou, Guangzhen 1 ; Wu, Jiao 2 ; Lu, Zhongliang 2 ; Jiang, Yiqi 2 ; Zhang, Xu 4 ; Lu, Yandu 4 ; Huang, Peng 5 ; Zeng, Jianguo 5 ; Wan, Yinglang 1 ;
作者机构： 1.Hainan Normal Univ, Coll Life Sci, Minist Educ, Key Lab Ecol Trop Isl, Haikou 571157, Peoples R China
2.Hainan Univ, Hainan Key Lab Sustainable Utilizat Bioresources, Haikou 570228, Peoples R China
3.Chinese Acad Trop Agr Sci, Environm & Plant Protect Inst, Haikou 571101, Peoples R China
4.Hainan Univ, Engn & Res Ctr Marine Bioact & Bioprod Hainan Prov, Sch Marine Biol & Fisheries, Haikou, Peoples R China
5.Hunan Agr Univ, Hunan Key Lab Tradit Chinese Vet Med, Changsha 410128, Hunan, Peoples R China
6.Hunan Agr Univ, Coll Anim Sci & Technol, Changsha 410128, Peoples R China
关键词： A. catechu; Arecoline; Pyridine alkaloids; Biosynthesis; Methyltransferase
期刊名称：INDUSTRIAL CROPS AND PRODUCTS （ 影响因子：6.2； 五年影响因子：6.2 ）
ISSN： 0926-6690
年卷期： 2025 年 228 卷
页码：
收录情况： SCI
摘要： Areca alkaloids, including arecoline and its metabolites, are abundant in areca nuts, the fruit produced by Areca catechu. Arecoline is considered the fourth most widely used psychoactive substance after nicotine, alcohol, and caffeine. However, the biosynthetic pathway and enzymes related to these alkaloids have remained largely unexplored until now. Using stable isotope tracer techniques, we identified trigonelline as a key precursor in arecoline biosynthesis and proposed a comprehensive biosynthetic pathway for this compound. We also integrated genomic and transcriptome data to identify candidate genes related to arecoline biosynthesis. Methylation events played a crucial role in the synthesis of arecoline and its derivatives, contributing to pyridine alkaloid diversification in A. catechu. Furthermore, whole genome duplication events facilitated the evolution of specific metabolites in A. catechu, while tandem duplication events contributed to the expansion of methyltransferase coding genes in its genome. We cloned and functionally characterized methyltransferase genes, including AcNMT8, AcOMT11, AcOMT16, and AcOMT19, and identified hub transcription factors, particularly the WRKY family, that may regulate pyridine alkaloid synthesis. Overall, our findings provide a foundational understanding for further elucidating the arecoline biosynthetic pathway and advancing molecular breeding efforts in A. catechu.
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