Identification of haemanthamine as a phytotoxic alkaloid in (Daffodil) emerging buds.

Emerging buds of were found to accumulate the alkaloid haemanthamine () at high concentrations, exceeding that of narciclasine (), the most abundant constituent in bulbs of the plant. A phytoactivity screening assay demonstrated the novel phytotoxicity of haemanthamine against (radish), (lettuce), (red wheat), (tomato), (cucumber), (Morning glory), and (lentil). Haemanthamine () phytotoxicity was found to exceed that of the commercial herbicide glyphosate and less toxic than narciclasine ().