Tangy Scent in Toona sinensis (Meliaceae) Leaflets: Isolation, Functional Characterization, and Regulation of TsTPS1 and TsTPS2, Two Key Terpene Synthase Genes in the Biosynthesis of the Scent Compound
作者:Chih-Yao Hsu、Pung-Ling Huang、Chih-Ming Chen、Chi-Tang Mao、Shu-Miaw Chaw
DOI:10.2174/138920112804724864
日期:2012.12.10
Toona sinensis (Chinese Mahogany; Meliaceae), a subtropical deciduous tree, has a tangy scent resembling a mix of shallots and garlic. T. sinensis has long been known for its medicinal efficacy for treating enteritis, dysentery, itch and some cancers. However, its volatile components and their biosynthesis remain unexamined. In this study, we identified the spectrum of volatile compounds, isolated
香椿(中国桃花心木; Mel科)是一种亚热带落叶树,气味浓郁,类似于葱和大蒜的混合物。长期以来,中华锥虫以其治疗肠炎,痢疾,瘙痒和某些癌症的功效而闻名。但是,其挥发性成分及其生物合成仍未检查。在这项研究中,我们确定了挥发性化合物的谱图,这些化合物分离并在功能上表征了两个萜类合酶基因Tstps1和Tstps2,这些基因负责中华T小叶中的萜类化合物合成。TsTPS1和TsTPS2在分别与香叶基香叶酯和法呢基二磷酸酯孵育后可提供多种产物,并分别分别在体外调节(+)柠檬烯和β-榄香烯的生物合成。顶空分析表明,98%的小叶挥发物是倍半萜类,发育中的小叶释放出比成熟小叶更大的多样性和数量的挥发物,β-榄香烯是其中的主要成分。这些数据表明中华绒螯蟹的气味由萜类化合物组成,并且Tstps2是中华绒螯蟹类萜生物合成中涉及的主要基因。原位杂交表明,叶轴突的腺细胞积累了大量的Tstps1 mRNA转录本。我们基