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Lactarius volemus sensu lato (Russulales) from northern Thailand: morphological and phylogenetic species concepts explored

Kobeke Van de Putte UGent, Jorinde Nuytinck UGent, Dirk Stubbe UGent, Thanh Le Huyen and Annemieke Verbeken UGent (2010) FUNGAL DIVERSITY. 45(1). p.99-130
abstract
Lactarius volemus (Fr.: Fr.) Fr. is a well known and morphologically easily recognizable milkcap of the Northern hemisphere, forming ectomycorrhiza with both deciduous and coniferous trees. It was originally described from Europe, but is also reported in other continents. Although it is characterized by several unique macro- and micromorphological features, substantial variation in colour, lamellae spacing and changing and staining of the latex has been recorded and it is therefore considered as a putatively unresolved species complex. This study explores the concordance between morphological and phylogenetic species concepts within L. volemus sensu lato of northern Thailand, combining a critical morphological scrutiny with a multiple gene genealogy based on LSU, ITS and rpb2 nuclear sequences. Twelve strongly supported monophyletic clades and six terminal branches are discernable in all phylogenetic trees and represent 18 phylogenetic species. Six of the monophyletic clades can be morphologically distinguished and are described as new species: L. acicularis, L. crocatus, L. distantifolius, L. longipilus, L. pinguis and L. vitellinus. Five other clades also show some morphological differences, but these are too subtle and do not allow for a clear-cut species delimitation without the corroboration of molecular data. Lactarius volemus sensu lato of northern Thailand is therefore still considered as a partially cryptic species complex. Pleurolamprocystidia, pileipellis hairs and to a lesser degree also pileus colour are important diagnostic characteristics. Spore morphology, latex discoloration and pileus surface texture are less useful as diagnostic features. Whether this rich diversity is the result of in situ Pleistocene survival or post-glacial expansion and subsequent radiation, has yet to be revealed.
Please use this url to cite or link to this publication:
author
organization
year
type
journalArticle (original)
publication status
published
subject
keyword
Species complex, Cryptic species, Morphology, BASIDIOMYCOTA, FUNGUS, COMPLEX, DIVERSITY, MIXED MODELS, LATE PLEISTOCENE, MOLECULAR PHYLOGENY, NUCLEOTIDE-SEQUENCES, CRYPTIC SPECIATION, Multiple gene phylogeny, MULTIPLE GENE GENEALOGIES, Russulaceae
journal title
FUNGAL DIVERSITY
Fungal Divers.
volume
45
issue
1
pages
99 - 130
Web of Science type
Article
Web of Science id
000284643500006
JCR category
MYCOLOGY
JCR impact factor
5.074 (2010)
JCR rank
1/21 (2010)
JCR quartile
1 (2010)
ISSN
1560-2745
DOI
10.1007/s13225-010-0070-0
language
English
UGent publication?
yes
classification
A1
copyright statement
I have transferred the copyright for this publication to the publisher
id
1123558
handle
http://hdl.handle.net/1854/LU-1123558
date created
2011-02-03 17:09:01
date last changed
2011-02-18 14:15:24
@article{1123558,
  abstract     = {Lactarius volemus (Fr.: Fr.) Fr. is a well known and morphologically easily recognizable milkcap of the Northern hemisphere, forming ectomycorrhiza with both deciduous and coniferous trees. It was originally described from Europe, but is also reported in other continents. Although it is characterized by several unique macro- and micromorphological features, substantial variation in colour, lamellae spacing and changing and staining of the latex has been recorded and it is therefore considered as a putatively unresolved species complex. This study explores the concordance between morphological and phylogenetic species concepts within L. volemus sensu lato of northern Thailand, combining a critical morphological scrutiny with a multiple gene genealogy based on LSU, ITS and rpb2 nuclear sequences. Twelve strongly supported monophyletic clades and six terminal branches are discernable in all phylogenetic trees and represent 18 phylogenetic species. Six of the monophyletic clades can be morphologically distinguished and are described as new species: L. acicularis, L. crocatus, L. distantifolius, L. longipilus, L. pinguis and L. vitellinus. Five other clades also show some morphological differences, but these are too subtle and do not allow for a clear-cut species delimitation without the corroboration of molecular data. Lactarius volemus sensu lato of northern Thailand is therefore still considered as a partially cryptic species complex. Pleurolamprocystidia, pileipellis hairs and to a lesser degree also pileus colour are important diagnostic characteristics. Spore morphology, latex discoloration and pileus surface texture are less useful as diagnostic features. Whether this rich diversity is the result of in situ Pleistocene survival or post-glacial expansion and subsequent radiation, has yet to be revealed.},
  author       = {Van de Putte, Kobeke and Nuytinck, Jorinde and Stubbe, Dirk and Huyen, Thanh Le and Verbeken, Annemieke},
  issn         = {1560-2745},
  journal      = {FUNGAL DIVERSITY},
  keyword      = {Species complex,Cryptic species,Morphology,BASIDIOMYCOTA,FUNGUS,COMPLEX,DIVERSITY,MIXED MODELS,LATE PLEISTOCENE,MOLECULAR PHYLOGENY,NUCLEOTIDE-SEQUENCES,CRYPTIC SPECIATION,Multiple gene phylogeny,MULTIPLE GENE GENEALOGIES,Russulaceae},
  language     = {eng},
  number       = {1},
  pages        = {99--130},
  title        = {Lactarius volemus sensu lato (Russulales) from northern Thailand: morphological and phylogenetic species concepts explored},
  url          = {http://dx.doi.org/10.1007/s13225-010-0070-0},
  volume       = {45},
  year         = {2010},
}

Chicago
Van de Putte, Kobeke, Jorinde Nuytinck, Dirk Stubbe, Thanh Le Huyen, and Annemieke Verbeken. 2010. “Lactarius Volemus Sensu Lato (Russulales) from Northern Thailand: Morphological and Phylogenetic Species Concepts Explored.” Fungal Diversity 45 (1): 99–130.
APA
Van de Putte, K., Nuytinck, J., Stubbe, D., Huyen, T. L., & Verbeken, A. (2010). Lactarius volemus sensu lato (Russulales) from northern Thailand: morphological and phylogenetic species concepts explored. FUNGAL DIVERSITY, 45(1), 99–130.
Vancouver
1.
Van de Putte K, Nuytinck J, Stubbe D, Huyen TL, Verbeken A. Lactarius volemus sensu lato (Russulales) from northern Thailand: morphological and phylogenetic species concepts explored. FUNGAL DIVERSITY. 2010;45(1):99–130.
MLA
Van de Putte, Kobeke, Jorinde Nuytinck, Dirk Stubbe, et al. “Lactarius Volemus Sensu Lato (Russulales) from Northern Thailand: Morphological and Phylogenetic Species Concepts Explored.” FUNGAL DIVERSITY 45.1 (2010): 99–130. Print.