Chemotaxonomy and phytochemical ecology of bracken

Cooper‐Driver, Gillian

doi:10.1111/j.1095-8339.1976.tb02011.x

Cited by 62 publications

(17 citation statements)

References 73 publications

(33 reference statements)

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“…aquilinum was widely accepted for almost 50 years. Cooper-Driver's (1976) failure to find variation amongst these taxa in secondary chemical constituents on a scale typical of species-level divergence in other ferns accorded with this view.…”

Section: Introgression and Gene Flowmentioning

confidence: 81%

Taxonomic status and relationships of bracken ferns (Pteridium: Dennstaedtiaceae) of Laurasian affinity in Central and North America

2008

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Detailed quantitative comparisons confirm and extend the discrimination of four major morphotypes amongst brackens of Laurasian affinity in Central and North America. These are recognized here at subspecies level as: Pteridium aquilinum sspp. feei, pubescens, latiusculum, and pseudocaudatum. Measurements of spore size indicate that sporophytes of P. aquilinum ssp. feei are diploid (2n = 104), as are sspp. pubescens, latiusculum, and pseudocaudatum. Phenetic cluster analysis based on DNA fingerprinting by arbitrarily primed polymerase chain reaction groups these four subspecies as genomically more similar to each other than to any taxa from other geographical regions. The chloroplast haplotype of ssp. feei is the same as that of sspp. latiusculum, pseudocaudatum, and pubescens with respect to the absence of both of the short direct repeats in the rps4-trnS region (haplotype A), whereas the European ssp. aquilinum (haplotype B) has one of these repeats, and the Southern Hemisphere brackens P. arachnoideum and P. esculentum (haplotype C) have the other.

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Section: Introgression and Gene Flowmentioning

confidence: 81%

Taxonomic status and relationships of bracken ferns (Pteridium: Dennstaedtiaceae) of Laurasian affinity in Central and North America

2008

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“…aquilinum in England regarding the content of the cyanogenic glycoside prunasin (cyanogenic polymorphism) (Cooper-Driver and Swain 1976;Cooper-Driver et al 1977). This has been attributed to the existence of bracken chemotypes (Cooper-Driver 1976;Cooper-Driver and Swain 1976;Low and Thomson 1990). The lack of Pta in some stands in the present study might therefore be explained by the existence of Pta chemotypes of bracken.…”

Section: Discussionmentioning

confidence: 99%

Variation in ptaquiloside content in bracken (Pteridium esculentum(Forst. f) Cockayne) in New Zealand

Rasmussen¹,

Lauren²,

Smith³

et al. 2008

New Zealand Veterinary Journal

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“…As a consequence of its broad distribution, poorly stable diagnostic features, population phenotype plasticity, and the existence of intermediate morphotype, there are several views on the taxa classifi cation within Pteridium. While some authors describe it as a monotypic genus with several varieties (Tryon 1941, Cooper-Driver 1976, Van Cotthem 1970, Taylor 1990, others have acknowledged several species (Thomson and Alonso-Amelot 2002, Thomson 2004, Thomson et al 2005. In the present work we follow the classifi cation scheme used by Der et al (2009), based on phylogenetic and biogeographical studies.…”

Section: Introductionmentioning

confidence: 99%

Palynological analysis of Dennstaedtiaceae taxa from the Paranaense Phytogeographic Province that produce Trilete spores II: Microlepia speluncae and Pteridium arachnoideum

Yañez

Márquez

Morbelli

2016

An. Acad. Bras. Ciênc.

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The spore morphology and wall ultrastructure of Microlepia speluncae and Pteridium arachnoideum from the Paranaense Province were analyzed with LM, SEM and TEM and a comparative analysis was carried out. In both species the spores are covered by a three-dimensional network of threads branched and fused, tangentially arranged to the surface, and some free-end threads are also seen. The species were differentiated by morphology and the frequency of threads fusion and the networks distribution on the surface of the spores. In both species the exospore is two-layered in section, both layers are traversed by single or branched channels. The perispore is three-layered in section: the inner layer is adhered to the exospore, the middle layer is formed of a three-dimensional network of threads and the outer layer is discontinuous. The perispore ultrastructure of Microlepia speluncae was interpreted as formed of helical subunits displayed around a central channel. The spore morphology and perispore ultrastructure allow differentiating Microlepia from Pteridium but also to the other Dennstaedtiaceae genera that grow in the Paranaense Province. The results obtained allow establishing relationships that let us recognize different groups and gave a new reference to get a better knowledge of the family.

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Chemotaxonomy and phytochemical ecology of bracken

Abstract: Variations in flavonoids extracted from fronds suggest that Pteridium aquilinum (L.) Kuhn is a monospecific genus. A wide range of secondary plant substances also occur in bracken including sesquiterpenoids, echydones, cyanogenic glycosides, tannins and phenolic acids.

Cited by 62 publications

References 73 publications

Taxonomic status and relationships of bracken ferns (Pteridium: Dennstaedtiaceae) of Laurasian affinity in Central and North America

Taxonomic status and relationships of bracken ferns (Pteridium: Dennstaedtiaceae) of Laurasian affinity in Central and North America

Variation in ptaquiloside content in bracken (Pteridium esculentum(Forst. f) Cockayne) in New Zealand

Palynological analysis of Dennstaedtiaceae taxa from the Paranaense Phytogeographic Province that produce Trilete spores II: Microlepia speluncae and Pteridium arachnoideum

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