Les especes belges du "complexe Bryum bicolor" (Musci)

Wilczek, R.; Demaret, F.

doi:10.2307/3667731

Cited by 17 publications

(3 citation statements)

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“…those described in Archidium wattsii (Stone, 1984), might well have been confused with fungal galls. A similar confusion could well be the case in Bryum barnesii and B. gemmiferum described by Wilczek & Demaret (1976).…”

Section: Introductionsupporting

confidence: 73%

Interactions between parasitic fungi and mosses: pegged and swollen-tipped rhizoids inFunariaandBryum

Martínez‐Abaigar

Núñez‐Olivera

Matcham

et al. 2005

Journal of Bryology

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Two kinds of parasitic fungal infections are described in the rhizoidal systems of both wild and cultured materials of Funaria hygrometrica, Bryum capillare and B. pseudotriquetrum. Protonemal and rhizoidal cells of Funaria produce pegs of host wall material around sites of hyphal penetration. Similar structures appear to be much more widespread in hepatics and in Monoclea have been misinterpreted as rudimentary pegs, the characteristic feature of pegged rhizoids.Swollen side branch initials and the tip cells of major rhizoidal axes contain a single rozellopsidalean (Oomycota formerly Chytridiomycota) zoosporangium in Bryum pseudotriquetrum and up to three similar structures in B. capillare. Each zoosporangium produces a single exit tube. Whereas the infected cells die the subapical cells remain alive and, after zoospore discharge, produce side branches whose tip cells also become infected. Restriction of the parasites to side branch initials and rhizoid tip cells is perhaps because these are the only cells that the zoospores are able to penetrate. Nutrients translocated along rhizoids to sustain tip growth are diverted to nurture the fungi in infected plants. Differences between the number of zoosporangia per host cell and the number of exit tubes between different mosses suggest that more than one species of rozellopsidalean fungus may form rhizoid galls in mosses and not just Pleotrachelus wildemani described previously. Rhizoid galls appear to be genuinely uncommon in mosses but, following clarification of the differences between these and rhizoidal tubers, further discoveries may be anticipated.

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Section: Introductionsupporting

confidence: 73%

Interactions between parasitic fungi and mosses: pegged and swollen-tipped rhizoids inFunariaandBryum

Martínez‐Abaigar

Núñez‐Olivera

Matcham

et al. 2005

Journal of Bryology

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“…Thus it was regarded as falling within the range of variation of B. bicolor by Smith & Whitehouse (1978) and Smith (1978) and also treated as a synonym of that species by Duell (1992). However, it was treated as a valid species by Wilczek & Demaret (1976), Demaret & Wilczek (1980), Dirkse, van Melick & Touw (1989), Demaret (1993) and Vanderpoorten & Zartman (2002). In Britain, well-marked forms of 'B.…”

Section: Methodsmentioning

confidence: 99%

“…Modern studies have also discovered additional species that differ in characters of tubers and bulbils that were previously ignored (e.g. Crundwell & Nyholm, 1964;Wilczek & Demaret, 1976;Smith & Whitehouse, 1978;Crundwell & Whitehouse, 2001). A series of revisions by H. Ochi covered the genus Bryum in Japan (Ochi, 1959) then almost worldwide (Ochi, 1972(Ochi, , 1980(Ochi, , 1985, but not its European or North American representatives.…”

Section: Introductionmentioning

confidence: 99%

Taxonomic notes on some European species ofBryum(Bryopsida: Bryaceae)

Holyoak¹

2004

Journal of Bryology

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The genus Bryum has more currently recognized species (ca 90) than any other moss genus in Europe and a reputation for taxonomic difficulty. It also includes numerous rare species, with 17 treated in the British Red Data Book. Despite large reductions over the past seventy years in the number of European taxa treated as species, several of the currently recognized species are known to intergrade, including some of those currently regarded as priorities for conservation. It is also apparent that there are several variable complexes within the genus in which plants with a few distinctive characters have traditionally been given species rank, yet few if any attempts have ever been made to ascertain how far different characters are correlated. From study of a variable population of B. inclinatum auct. it is demonstrated that numerous characters of the capsule (size of the capsule mouth, character of the exothecial cells, shape of the operculum, structural details of the exostome teeth) may be correlated because of causal interactions during growth and should not be regarded as independent characters.A combination of field and herbarium studies has been used to revise the taxonomy of some European Bryum species. The following taxonomic changes are proposed: B. archangelicum Bruch & Schimp. is conspecific with B. inclinatum (Brid.) Turton and should be used to replace this illegitimate name, instead of B. amblyodon Mü ll.Hal. or B. imbricatum (Schwä gr.) Bruch & Schimp.; B. curvatum Kaurin & Arnell is another synonym of this variable species. Synonyms of the variable B. arcticum (R.Br.) Bruch & Schimp. include B. bryoides (R.Br.) Wijk & Margad., B. purpurascens (R.Br.) Bruch & Schimp. and B. lawersianum H.Philib. B. axel-blyttii Kaurin ex H.Philib. and B. acutiforme Limpr. are best treated as synonyms or infraspecific taxa of B. calophyllum R.Br. B. platyloma Schwä gr., B. rufifolium (Dixon) Demaret & R. Wilczek and B. validicostatum Cardot & Dixon are regarded as synonyms or varieties of B. capillare Hedw. B. barnesii Wood ex Schimp. and B. balticum Nyholm & Hedenä s should be treated as synonyms of B. dichotomum Hedw., to which they are linked by many intermediate plants. B. stirtonii Schimp. is regarded as a synonym of B. elegans Nees, and B. nitidulum Lindb. as a synonym of B. intermedium (Brid.) Blandow. Bryum caespiticium var. imbricatum Bruch & Schimp. apparently merits species rank and should be known as B. kunzei Hoppe & Hornsch. Differences between B. kunzei and B. funckii Schwä gr. are described, demonstrating that adoption of the latter name in the British Census Catalogue to replace B. caespiticium var. imbricatum was incorrect. Bryum moravicum Podp. is an earlier name that should replace B. laevifilum Syed. Synonyms of B. pallens Sw. include its var. fallax Jur., B. oeneum Blytt ex Bruch & Schimp., B. subelegans Kindb. and European plants assigned to B. rutilans auct. B. torquescens Bruch & Schimp. merits separation at species rank from B. capillare; its synonyms include B. icodense H.Winter. B. mamillatu...

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Phylogenetic investigations of a well supported clade within the acrocarpous moss family Bryaceae: evidence from seven chloroplast DNA sequences and morphology

Pedersen

Hedenäs

2003

Plant Systematics and Evolution

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Les especes belges du "complexe Bryum bicolor" (Musci)

Cited by 17 publications

References 0 publications

Interactions between parasitic fungi and mosses: pegged and swollen-tipped rhizoids inFunariaandBryum

Interactions between parasitic fungi and mosses: pegged and swollen-tipped rhizoids inFunariaandBryum

Taxonomic notes on some European species ofBryum(Bryopsida: Bryaceae)

Phylogenetic investigations of a well supported clade within the acrocarpous moss family Bryaceae: evidence from seven chloroplast DNA sequences and morphology

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