Constitutive polymorphic cyanogenesis in the Australian rainforest tree, Ryparosa kurrangii (Achariaceae).
Phytochemistry
; 68(15): 2068-74, 2007 Aug.
Article
en En
| MEDLINE
| ID: mdl-17570449
ABSTRACT
Cyanogenesis, the liberation of volatile hydrogen cyanide from endogenous cyanide-containing compounds, is a proven plant defence mechanism and the particular cyanogens involved have taxonomic utility. The cyclopentenoncyanhydrin glycoside gynocardin was the only cyanogen isolated from foliar tissue of the rare Australian rainforest tree, Ryparosa kurrangii (Achariaceae). Mechanical damage simulating foliar herbivory did not induce a significant increase in the expression of cyanogenesis over a 24h period, indicating cyanogenic herbivore defence in R. kurrangii is constitutive. The cyanogenic potential of mature leaves was quantitatively polymorphic between trees in a natural population, ranging from 0.54 to 4.77 mg CN g(-1) dry wt leaf tissue.
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Banco de datos:
MEDLINE
Asunto principal:
Clima Tropical
/
Magnoliopsida
/
Glicósidos
/
Nitrilos
País/Región como asunto:
Oceania
Idioma:
En
Año:
2007
Tipo del documento:
Article