Invasive Fallopia x bohemica interspecific hybrids display different patterns in secondary metabolites
Invasive Fallopia x bohemica interspecific hybrids display different patterns in secondary metabolites
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DOI：
10.2980/20-3-3597
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发表时间：
2013-01-01
期刊：
影响因子：
1.3
通讯作者：
Bertrand, Cedric
中科院分区：
文献类型：
--
作者：
Piola, Florence;Bellvert, Floriant;Bertrand, Cedric
植物次生代谢产物是入侵植物在新环境中受益的重要特征。在入侵区域迅速进化的情况下，引进植物的化学武器可能会多样化，这些次生代谢物可能会表现出新的组合或极端浓度。入侵的Fallopia物种复合体(F.jagonica、F.sachalinensis和F.x Bohemica种间杂种)是评估引进后进化过程中化学特性如何变化的一个很好的模型。分析比较了波西米草杂交种和引种亲本次生代谢物提取物的组成。得到了每一种凤眼莲的高效液相色谱-DAD图谱，其主要色谱峰代表酚类化合物。基于次生代谢物谱的分析表明，波西米草杂交种更接近于日本羊草。波西米亚黑麦草杂交种表达了日本黑粉菌和高山黑粉菌中描述的复合族，它们之间存在数量上的差异。混合化学鸡尾酒显示了化学武器的多样化。此外，还观察到了超越式隔离。首次在一种羊栖菜中鉴定出三种双菲罗酮，并且在日本羊草和波西米草杂交种中的表达更高。这些结果表明，在入侵地区，Fallopia分类群的化学特性发生了进化，以至于某些基因很可能已经获得了新的化学鸡尾酒，这是引入后杂交的结果。
Plant secondary metabolites are important traits that can benefit an invasive plant in its new environment. In the case of rapid evolution in the invaded area, the chemical weapons of introduced plants may diversify, and novel combinations or extreme concentrations of these secondary metabolites may be expressed. The invasive Fallopia species complex (F. japonica, F. sachalinensis, and the F. x bohemica interspecific hybrids) is a good model to assess how chemical traits can vary during post-introduction evolution. We analyzed and compared the composition of secondary metabolite extracts in F. x bohemica hybrids and in the parental species grown in the introduced area. HPLC-DAD profiles were obtained for each Fallopia species, and the main peaks of the HPLC chromatograms represent phenolic compounds. Analyses based on secondary metabolite profiles showed that F. x bohemica hybrids are closer to F. japonica. The F. x bohemica hybrids expressed the compound families described in F. japonica and F. sachalinensis, with quantitative variations between them. Hybrid chemical cocktails showed a diversification of chemical weapons. Furthermore, transgressive segregation was observed. Three dianthrones were identified for the first time in a Fallopia species and were more highly expressed in F. japonica and F. x bohemica hybrids. These results suggest an evolution in the chemical traits of Fallopia taxa in invaded areas such that certain genotypes may well have acquired new chemical cocktails resulting from post-introduction hybridizations.