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Bacterial leaf symbiosis in Angiosperms: host specificity without co-speciation

Benny Lemaire, Peter Vandamme UGent, Vincent Merckx, Erik Smets and Steven Dessein (2011) PLOS ONE. 6(9).
abstract
Bacterial leaf symbiosis is a unique and intimate interaction between bacteria and flowering plants, in which endosymbionts are organized in specialized leaf structures. Previously, bacterial leaf symbiosis has been described as a cyclic and obligate interaction in which the endosymbionts are vertically transmitted between plant generations and lack autonomous growth. Theoretically this allows for co-speciation between leaf nodulated plants and their endosymbionts. We sequenced the nodulated Burkholderia endosymbionts of 54 plant species from known leaf nodulated angiosperm genera, i.e. Ardisia, Pavetta, Psychotria and Sericanthe. Phylogenetic reconstruction of bacterial leaf symbionts and closely related free-living bacteria indicates the occurrence of multiple horizontal transfers of bacteria from the environment to leaf nodulated plant species. This rejects the hypothesis of a long co-speciation process between the bacterial endosymbionts and their host plants. Our results indicate a recent evolutionary process towards a stable and host specific interaction confirming the proposed maternal transmission mode of the endosymbionts through the seeds. Divergence estimates provide evidence for a relatively recent origin of bacterial leaf symbiosis, dating back to the Miocene (5-23 Mya). This geological epoch was characterized by cool and arid conditions, which may have triggered the origin of bacterial leaf symbiosis.
Please use this url to cite or link to this publication:
author
organization
year
type
journalArticle (original)
publication status
published
subject
keyword
FOSSIL FLOWERS, ENDOPHYTE CONTINUITY, CHLOROPLAST DNA, NORTH-AMERICA, AZOLLA-ANABAENA SYMBIOSIS, EPIDERMAL TRICHOMES, NONCODING REGIONS, CLIMATE-CHANGE, MIXED MODELS, LIFE-CYCLE
journal title
PLOS ONE
PLoS One
volume
6
issue
9
article_number
e24430
pages
10 pages
Web of Science type
Article
Web of Science id
000294802500044
JCR category
BIOLOGY
JCR impact factor
4.092 (2011)
JCR rank
12/84 (2011)
JCR quartile
1 (2011)
ISSN
1932-6203
DOI
10.1371/journal.pone.0024430
language
English
UGent publication?
yes
classification
A1
copyright statement
I have retained and own the full copyright for this publication
id
2006431
handle
http://hdl.handle.net/1854/LU-2006431
date created
2012-01-27 13:21:06
date last changed
2012-01-31 11:46:05
@article{2006431,
  abstract     = {Bacterial leaf symbiosis is a unique and intimate interaction between bacteria and flowering plants, in which endosymbionts are organized in specialized leaf structures. Previously, bacterial leaf symbiosis has been described as a cyclic and obligate interaction in which the endosymbionts are vertically transmitted between plant generations and lack autonomous growth. Theoretically this allows for co-speciation between leaf nodulated plants and their endosymbionts. We sequenced the nodulated Burkholderia endosymbionts of 54 plant species from known leaf nodulated angiosperm genera, i.e. Ardisia, Pavetta, Psychotria and Sericanthe. Phylogenetic reconstruction of bacterial leaf symbionts and closely related free-living bacteria indicates the occurrence of multiple horizontal transfers of bacteria from the environment to leaf nodulated plant species. This rejects the hypothesis of a long co-speciation process between the bacterial endosymbionts and their host plants. Our results indicate a recent evolutionary process towards a stable and host specific interaction confirming the proposed maternal transmission mode of the endosymbionts through the seeds. Divergence estimates provide evidence for a relatively recent origin of bacterial leaf symbiosis, dating back to the Miocene (5-23 Mya). This geological epoch was characterized by cool and arid conditions, which may have triggered the origin of bacterial leaf symbiosis.},
  articleno    = {e24430},
  author       = {Lemaire, Benny and Vandamme, Peter and Merckx, Vincent and Smets, Erik and Dessein, Steven},
  issn         = {1932-6203},
  journal      = {PLOS ONE},
  keyword      = {FOSSIL FLOWERS,ENDOPHYTE CONTINUITY,CHLOROPLAST DNA,NORTH-AMERICA,AZOLLA-ANABAENA SYMBIOSIS,EPIDERMAL TRICHOMES,NONCODING REGIONS,CLIMATE-CHANGE,MIXED MODELS,LIFE-CYCLE},
  language     = {eng},
  number       = {9},
  pages        = {10},
  title        = {Bacterial leaf symbiosis in Angiosperms: host specificity without co-speciation},
  url          = {http://dx.doi.org/10.1371/journal.pone.0024430},
  volume       = {6},
  year         = {2011},
}

Chicago
Lemaire, Benny, Peter Vandamme, Vincent Merckx, Erik Smets, and Steven Dessein. 2011. “Bacterial Leaf Symbiosis in Angiosperms: Host Specificity Without Co-speciation.” Plos One 6 (9).
APA
Lemaire, B., Vandamme, P., Merckx, V., Smets, E., & Dessein, S. (2011). Bacterial leaf symbiosis in Angiosperms: host specificity without co-speciation. PLOS ONE, 6(9).
Vancouver
1.
Lemaire B, Vandamme P, Merckx V, Smets E, Dessein S. Bacterial leaf symbiosis in Angiosperms: host specificity without co-speciation. PLOS ONE. 2011;6(9).
MLA
Lemaire, Benny, Peter Vandamme, Vincent Merckx, et al. “Bacterial Leaf Symbiosis in Angiosperms: Host Specificity Without Co-speciation.” PLOS ONE 6.9 (2011): n. pag. Print.