Quantification of cyanogenic glycosides in seedlings of three Macadamia (Proteaceae) species

Dahler J.M., McConchie C.A. and Turnbull C.G.N. (1995) Quantification of cyanogenic glycosides in seedlings of three Macadamia (Proteaceae) species. Australian Journal of Botany, 43 6: 619-628. doi:10.1071/BT9950619

Author Dahler J.M.
McConchie C.A.
Turnbull C.G.N.
Title Quantification of cyanogenic glycosides in seedlings of three Macadamia (Proteaceae) species
Journal name Australian Journal of Botany   Check publisher's open access policy
ISSN 1444-9862
Publication date 1995-01-01
Sub-type Article (original research)
DOI 10.1071/BT9950619
Open Access Status Not yet assessed
Volume 43
Issue 6
Start page 619
End page 628
Total pages 10
Language eng
Subject 1105 Ecology, Evolution, Behavior and Systematics
1110 Plant Science
Abstract Members of the genus Macadamia contain cyanogenic compounds, which release hydrogen cyanide (HCN) on hydrolysis. Concentrations of releasable cyanide were measured in tissues of mature nuts and seedlings of Macadamia integrifolia Maiden & Betche, M. tetraphylla L.A.S. Johnson and M. ternifolia F. Muell. Root, cotyledon and leaf samples were assayed at several developmental stages from germination to maturation of the first leaves. All samples contained detectable levels of cyanide. Concentrations were low (0.15 µmol g fresh weight) in cotyledons of mature M. integrifolia and M. tetraphylla seeds, corresponding to the edibility of the seeds of these commercial species, and much higher (9.6 µmol g) in the inedible M. ternifolia seeds. Levels in cotyledons of all three species rose dramatically during germination. Root cyanide concentrations of 6-23 µmol g were measured. The immature first leaf of the commercial species contained the highest concentrations (38-77 µmol g). Levels decreased with leaf maturity, correlating with toughening of the leaf and possibly a consequent diminished requirement for cyanide as a herbivory deterrent. The significance of the results with respect to plant-insect interactions is discussed.
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Unknown

Document type: Journal Article
Sub-type: Article (original research)
Collection: Scopus Import - Archived
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Citation counts: TR Web of Science Citation Count  Cited 32 times in Thomson Reuters Web of Science Article | Citations
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