Cyanogenesis in species of the fern genera Cystopteris and Davalla

Kofod, Helmer; Eyjolfsson, Reynir

doi:10.1016/s0031-9422(00)85922-1

Cited by 26 publications

(12 citation statements)

References 7 publications

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“…The rutinosides lb and 2b expand the relatively small family of natural diglycosides with cyanohydrin aglycones (25); such glycosides are usually, although not always (26), found in the reproductive parts of plants, as in the present work.…”

Section: Resultssupporting

confidence: 53%

Novel Cyclopentenoid Cyanohydrin Rhamnoglucosides from Flacourtiaceae¹

Jaroszewski¹,

Bruun²,

Clausen³

et al. 1988

Planta Med

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Two novel cyclopentenoid cyanohydrin glycosides, (1 S,4 R)-and (1 R,4 S)-1-[6- O-(alpha- L-rhamnopyranosyl)-beta- D-glucopyranosyloxy]-4-hydroxy-2-cyclopentene-1-carbonitrile, were isolated from seeds of the Indian medicinal plant HYDNOCARPUS PENTANDRA (F. Ham.) Oken (Flacourtiaceae) and characterized by optical rotations as well as (1)H-and (13)C-NMR spectra. The structural assignment is founded on these data and on degradation with alpha- L-rhamnosidase to the corresponding beta- D-glucopyranosides, epivolkenin and taraktophyllin, also present in the seeds in small amounts. Earlier reports of cyclopentenoid rhamnoglucosides from Passifloraceae are rejected.

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Section: Resultssupporting

confidence: 53%

Novel Cyclopentenoid Cyanohydrin Rhamnoglucosides from Flacourtiaceae¹

Jaroszewski¹,

Bruun²,

Clausen³

et al. 1988

Planta Med

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“…Indeed, with rare exception (e.g. Kofod and Eyjólfsson 1969;Miller et al 2006b), cyanogenic di-glycosides are restricted to generative parts of the plants, the fruits and seeds. Small quantities of amygdalin have, however, previously been reported from foliage (e.g.…”

Section: Discussionmentioning

confidence: 99%

Cyanogenesis in the Australian tropical rainforest endemic Brombya platynema (Rutaceae): chemical characterisation and polymorphism

Miller

Simon

Woodrow

2006

Functional Plant Biol.

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Abstract. This study examined two aspects of cyanogenesis in Brombya platynema F. Muell. (Rutaceae), a subcanopy tree endemic to tropical rainforest in far north Queensland, Australia. First, cyanogenic glycosides in foliage were fractionated and identified. The rare meta-hydroxylated cyanogenic glycoside, holocalin, was identified as the principal cyanogen, and traces of prunasin and amygdalin were detected. This is the first characterisation of cyanogenic constituents within the genus, and to the authors' knowledge, only the third within the Rutaceae, and the order Rutales. Second, variation in cyanogenic glycoside content within a population of B. platynema in lowland tropical rainforest was quantified. Both qualitative and quantitative polymorphism for cyanogenesis was identified. Interestingly, ∼57% of individuals were considered acyanogenic, with concentrations of cyanogenic glycosides less than 8 µg CN g −1 DW. Among cyanogenic individuals there was substantial quantitative variation in cyanogenic glycoside concentration, which varied from 10.5 to 1285.9 µg CN g −1 DW. This high frequency of acyanogenic individuals is contrasted with the apparent absence of the acyanogenesis among populations of other tropical rainforest tree species. In the high herbivory environment of the tropical rainforest, this frequency of acyanogenesis among cyanogenic tropical tree taxa is unique.

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“…This suggests that cyanogen-esis is not a common phenomenon among ferns (501). (R)-Prunasin (853) and (R)-vicianin (854) have been isolated from several ferns (482,483,485,486). Young frond of Davallia trichomanoides is a rich source of (R)-vicianin (854) (486).…”

Section: Lipidsmentioning

confidence: 99%