Frequency of cyanogenesis in tropical rainforests of far north Queensland, Australia

Annals of Botany
Rebecca E MillerIan E Woodrow

Abstract

Plant cyanogenesis is the release of toxic cyanide from endogenous cyanide-containing compounds, typically cyanogenic glycosides. Despite a large body of phytochemical, taxonomic and ecological work on cyanogenic species, little is known of their frequency in natural plant communities. This study aimed to investigate the frequency of cyanogenesis in Australian tropical rainforests. Secondary aims were to quantify the cyanogenic glycoside content of tissues, to investigate intra-plant and intra-population variation in cyanogenic glycoside concentration and to appraise the potential chemotaxonomic significance of any findings in relation to the distribution of cyanogenesis in related taxa. All species in six 200 m(2) plots at each of five sites across lowland, upland and highland tropical rainforest were screened for cyanogenesis using Feigl-Anger indicator papers. The concentrations of cyanogenic glycosides were accurately determined for all cyanogenic individuals. Over 400 species from 87 plant families were screened. Overall, 18 species (4.5 %) were cyanogenic, accounting for 7.3 % of total stem basal area. Cyanogenesis has not previously been reported for 17 of the 18 species, 13 of which are endemic to Australia. Several spe...Continue Reading

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Citations

Mar 4, 2014·Annual Review of Plant Biology·Roslyn M Gleadow, Birger Lindberg Møller
May 14, 2008·Phytochemistry·Roslyn M GleadowEric E Conn
Feb 27, 2018·Phytochemistry·Craig A Schenck, Hiroshi A Maeda
Nov 17, 2021·Planta medica·Matthias LechtenbergAndreas Hensel

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