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| Bioprospecting is the search for valuable products from natural sources. Given that most species are poorly known, a key question is where to search. Ethnodirected bioprospecting approaches use traditional knowledge in the process of selecting plants to screen for desired properties. A comple-mentary approach is to utilize phylogenetic analyses based on traditional uses or known chemistry
to identify lineages in which desired properties are most likely to be found. Novel discoveries of plant bioactivity from these approaches can aid the development of treatments for diseases with unmet medical needs. For example, neurological disorders are a growing concern, and psychoactive plants used in traditional medicine may provide botanical sources for bioactivity relevant for treating diseases related to the brain and nervous system. However, no systematic study has explored the diversity and phylogenetic distribution of psychoactive plants. We compiled a database of 501 psy-choactive plant species and their properties from published sources. We mapped these plant attri-butes on a phylogenetic tree of all land plant genera and showed that psychoactive properties are
not randomly distributed on the phylogeny of land plants; instead certain plant lineages show over-abundance of psychoactive properties. Furthermore, employing a ‘hot nodes’ approach to identify these lineages, we can narrow down our search for novel psychoactive plants to 8.5% of all plant genera for psychoactivity in general and 1–4% for specific categories of psychoactivity investigated. Our results showcase the potential of using a phylogenetic approach to bioprospect plants for psy-choactivity and can serve as foundation for future investigations. | |
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