Chloroplast DNA-relationship in palaeoaustralLopidium concinnum (Hypopterygiaceae, Musci). An example of stenoevolution in mosses Studies in austral temperate rain forest bryophytes 2

Frey, Wolfgang; Stech, Michael; Meißner, Kathrin

doi:10.1007/bf01087035

Cited by 47 publications

(42 citation statements)

References 12 publications

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“…Although rps4 as well as trnL-F are classic markers in molecular phylogenetics of bryophytes, the two spacers separating rps4 from trnT and trnT from trnL have been largely ignored. Only the trnT-L IGS has been occasionally used with varying success exclusively on generic or population levels (e.g., Frey et al 1999;Pfeiffer et al 2004;). On deeper levels, however, Hernández-Maqueda et al (2008) were the first to successfully use both spacers combined with rps4 and trnL-F in a phylogenetic study on the Grimmiaceae, an approach that was followed here.…”

Section: Discussionmentioning

confidence: 99%

Phylogenetic analyses reveal high levels of polyphyly among pleurocarpous lineages as well as novel clades

Olsson¹,

Buchbender²,

Enroth

et al. 2009

The Bryologist

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ABSTRACT. Phylogenetic analyses of the Hypnales usually show the same picture of poorly resolved trees with a large number of polyphyletic taxa and low support for the few reconstructed clades. One odd clade, however, consisting of three genera that are currently treated either within the Leskeaceae (Miyabea) or Neckeraceae (Homaliadelphus and Bissetia), was retrieved in a previously published phylogeny based on chloroplast rbcL. In order to elucidate the reliability of the observed Homaliadelphus -Miyabea -Bissetia -clade (HMB-clade) and to reveal its phylogenetic relationships a molecular study based on a representative set of hypnalean taxa was performed. Sequence data from all three genomes, namely the ITS1 and 2 (nuclear), the trnS-rps4-trnT-trnL-trnF cluster (plastid), the nad5 intron (mitochondrial), were analyzed. Although the phylogenetic reconstruction of the combined data set was not fully resolved regarding the backbone it clearly indicated the polyphyletic nature of various hypnalean families, such as the Leskeaceae, Hypnaceae, Hylocomiaceae, Neckeraceae, Leptodontaceae and Anomodontaceae with respect to the included taxa. In addition the results favor the inclusion of the Leptodontaceae and Thamnobryaceae in the Neckeraceae. The maximally supported HMB-clade consisting of the three genera Homaliadelphus (2-3 species), Miyabea (3 species) and Bissetia (1 species) is resolved sister to a so far unnamed clade comprising Taxiphyllum aomoriense, Glossadelphus ogatae and Leptopterigynandrum. The well-resolved and supported HMBclade, here formally described as the Miyabeaceae, fam. nov. is additionally supported by morphological characters such as strongly incrassate, porose leaf cells, a relatively weak and diffuse costa and the presence of dwarf males. The latter are absent in the Neckeraceae and the Leskeaceae. It is essentially an East Asian family, with one species occurring in North America.

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Section: Discussionmentioning

confidence: 99%

Phylogenetic analyses reveal high levels of polyphyly among pleurocarpous lineages as well as novel clades

Olsson¹,

Buchbender²,

Enroth

et al. 2009

The Bryologist

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“…The liverwort genus Monoclea has a geographic distribution and pattern of genetic variation nearly identical to that of P. mnioides (Meißner et al 1998), suggesting a common Gondwanan history. Frey et al (1999) and Pfeiffer (2000) report Gondwanan divergence between populations of the mosses Lopidium concinnum and Hypopterigium rotulatum, respectively. In contrast to the molecular divergence found in P. mnioides and Monoclea, populations of L. concinnum and H. rotulatum disjunct between Australasia and South America are scarcely differentiated (0.2% and 0% sequence divergence, respectively).…”

Section: Intercontinental Disjunctions: Dispersal or Vicariance?mentioning

confidence: 99%

“…Where two collections are listed for a population, sequences were derived from both collections to complete the dataset. Haplotype names correspond with those from Figure 2 taxa (Setoguchi et al 1997;Meißner et al 1998;Frey et al 1999;Pfeiffer 2000;Renner et al 2000), thus providing a range of estimated divergence values for comparison.…”

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confidence: 99%

Phylogeographic Structure and Cryptic Speciation in the Trans-Antarctic Moss Pyrrhobryum Mnioides

2003

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Abstract. Many bryophyte species have distributions that span multiple continents. The hypotheses historically advanced to explain such distributions rely on either long-distance spore dispersal or slow rates of morphological evolution following ancient continental vicariance events. We use phylogenetic analyses of DNA sequence variation at three chloroplast loci (atpB-rbcL spacer, rps4 gene, and trnL intron and 3Ј spacer) to examine these two hypotheses in the trans-Antarctic moss Pyrrhobryum mnioides. We find: (1) reciprocal monophyly of Australasian and South American populations, indicating a lack of intercontinental dispersal; (2) shared haplotypes between Australia and New Zealand, suggesting recent or ongoing migration across the Tasman Sea; and (3) reciprocal monophyly among Patagonian and neotropical populations, suggesting no recent migration along the Andes. These results corroborate experimental work suggesting that spore features may be critical determinants of species range. We use the mid-Miocene development of the Atacama Desert, 14 million years ago, to calibrate a molecular clock for the tree. The age of the trans-Antarctic disjunction is estimated to be 80 million years ago, consistent with Gondwanan vicariance, making it among the most ancient documented cases of cryptic speciation. These data are in accord with niche conservatism, but whether the morphological stasis is a product of stabilizing selection or phylogenetic constraint is unknown.

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“…A molecular analysis can only state whether base sequences of certain genes of populations of the same species in disjunct populations are identical or not. Identical base sequences can, however, be the result of gene exchange but also of relict population, which have not undergone genetic changes since the separation of the populations (stenoevolution sensu Frey et al 1999). Additional arguments are required to decide whether the species are able for long distance dispersal or not tolerance to frost or UV-radiation, see van Zanten (1976van Zanten ( , 1978van Zanten ( , 1983van Zanten ( , 1984, sterility or rarety of sporulation, morphological arguments (spore size, cleistocarpy), habitats (epiphytes in the understory of forests as opposed to species from open habitats), life strategies (colonists vs. perennial stayers).…”

Section: Discussionmentioning

confidence: 99%

“…Attempts have been made to solve the question experimentally ( van Zanten 1976van Zanten , 1978van Zanten , 1983van Zanten , 1984 and very recently by molecular studies (Meißner et al 1998, Frey et al 1999, Stech et al 1999 Van Zanten (1976) tested 139 disjunct bryophyte species for their ability for long distance dispersal Blöcher & Frahm (germination experiments with wet-and dryfreezing). Amongst these species there were 38 species occurring in Chile and New Zealand.…”

Section: Discussionmentioning

confidence: 99%

<strong>A comparison of the moss floras of Chile and New Zealand</strong>

Blöcher

Frahm

2002

BDE

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Summary:Chile and New Zealand share a common stock of 181 species of mosses in 94 genera and 34 families. This number counts for 23.3% of the Chilean and 34.6% of the New Zealand moss flora. If only species with austral distribution are taken into account, the number is reduced to 113 species in common, which is 14.5% of the Chilean and 21.6% of the New Zealand moss flora. This correlation is interpreted in terms of long distance dispersal resp. the common phytogeographical background of both countries as parts of the palaoaustral floristic region and compared with disjunct moss floras of other continents as well as the presently available molecular data.

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Chloroplast DNA-relationship in palaeoaustralLopidium concinnum (Hypopterygiaceae, Musci). An example of stenoevolution in mosses Studies in austral temperate rain forest bryophytes 2

Cited by 47 publications

References 12 publications

Phylogenetic analyses reveal high levels of polyphyly among pleurocarpous lineages as well as novel clades

Phylogenetic analyses reveal high levels of polyphyly among pleurocarpous lineages as well as novel clades

Phylogeographic Structure and Cryptic Speciation in the Trans-Antarctic Moss Pyrrhobryum Mnioides

<strong>A comparison of the moss floras of Chile and New Zealand</strong>

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