The role of epiphytism in architecture and evolutionary constraint within mycorrhizal networks of tropical orchids
Characterizing the architecture of bipartite networks is increasingly used as a framework to study biotic interactions within their ecological context and to assess the extent to which evolutionary constraint shape them. Orchid mycorrhizal symbioses are particularly interesting as they are viewed as...
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| Veröffentlicht in: | Molecular ecology 2012-10, Vol.21 (20), p.5098-5109 |
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| container_title | Molecular ecology |
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| creator | MARTOS, FLORENT MUNOZ, FRANÇOIS PAILLER, THIERRY KOTTKE, INGRID GONNEAU, CÉDRIC SELOSSE, MARC-ANDRÉ |
| description | Characterizing the architecture of bipartite networks is increasingly used as a framework to study biotic interactions within their ecological context and to assess the extent to which evolutionary constraint shape them. Orchid mycorrhizal symbioses are particularly interesting as they are viewed as more beneficial for plants than for fungi, a situation expected to result in an asymmetry of biological constraint. This study addressed the architecture and phylogenetic constraint in these associations in tropical context. We identified a bipartite network including 73 orchid species and 95 taxonomic units of mycorrhizal fungi across the natural habitats of Reunion Island. Unlike some recent evidence for nestedness in mycorrhizal symbioses, we found a highly modular architecture that largely reflected an ecological barrier between epiphytic and terrestrial subnetworks. By testing for phylogenetic signal, the overall signal was stronger for both partners in the epiphytic subnetwork. Moreover, in the subnetwork of epiphytic angraecoid orchids, the signal in orchid phylogeny was stronger than the signal in fungal phylogeny. Epiphytic associations are therefore more conservative and may co‐evolve more than terrestrial ones. We suggest that such tighter phylogenetic specialization may have been driven by stressful life conditions in the epiphytic niches. In addition to paralleling recent insights into mycorrhizal networks, this study furthermore provides support for epiphytism as a major factor affecting ecological assemblage and evolutionary constraint in tropical mycorrhizal symbioses.
See also the Perspective by Leake and Cameron |
| doi_str_mv | 10.1111/j.1365-294X.2012.05692.x |
| format | Article |
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MUNOZ, FRANÇOIS ; PAILLER, THIERRY ; KOTTKE, INGRID ; GONNEAU, CÉDRIC ; SELOSSE, MARC-ANDRÉ</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c5682-daf5957dce04ccdf65d6ecffb6331603e81a2bedfd50b459d79d1a10cbd13ac23</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2012</creationdate><topic>Biological Evolution</topic><topic>co-evolution</topic><topic>DNA, Fungal - genetics</topic><topic>DNA, Ribosomal Spacer - genetics</topic><topic>Evolutionary biology</topic><topic>Fungi</topic><topic>interaction networks</topic><topic>Life Sciences</topic><topic>Models, Genetic</topic><topic>modularity</topic><topic>Molecular Sequence Data</topic><topic>Mycorrhizae - classification</topic><topic>Mycorrhizae - genetics</topic><topic>nestedness</topic><topic>orchid mycorrhizal symbiosis</topic><topic>Orchidaceae</topic><topic>Orchidaceae - genetics</topic><topic>Orchidaceae - microbiology</topic><topic>phylogenetic bipartite signal</topic><topic>Phylogenetics</topic><topic>Phylogeny</topic><topic>Plant ecology</topic><topic>Plant Roots - microbiology</topic><topic>Reunion</topic><topic>Sequence Analysis, DNA</topic><topic>Symbiosis - genetics</topic><topic>Taxonomy</topic><topic>Vegetal Biology</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>MARTOS, FLORENT</creatorcontrib><creatorcontrib>MUNOZ, FRANÇOIS</creatorcontrib><creatorcontrib>PAILLER, THIERRY</creatorcontrib><creatorcontrib>KOTTKE, INGRID</creatorcontrib><creatorcontrib>GONNEAU, CÉDRIC</creatorcontrib><creatorcontrib>SELOSSE, MARC-ANDRÉ</creatorcontrib><collection>Istex</collection><collection>Medline</collection><collection>MEDLINE</collection><collection>MEDLINE (Ovid)</collection><collection>MEDLINE</collection><collection>MEDLINE</collection><collection>PubMed</collection><collection>CrossRef</collection><collection>Ecology Abstracts</collection><collection>Entomology Abstracts (Full archive)</collection><collection>Technology Research Database</collection><collection>Environmental Sciences and Pollution Management</collection><collection>Engineering Research Database</collection><collection>Algology Mycology and Protozoology Abstracts (Microbiology C)</collection><collection>Biotechnology and BioEngineering Abstracts</collection><collection>Genetics Abstracts</collection><collection>ASFA: Aquatic Sciences and Fisheries Abstracts</collection><collection>Aquatic Science & Fisheries Abstracts (ASFA) 1: Biological Sciences & Living Resources</collection><collection>Aquatic Science & Fisheries Abstracts (ASFA) Professional</collection><collection>MEDLINE - Academic</collection><collection>Hyper Article en Ligne (HAL)</collection><jtitle>Molecular ecology</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>MARTOS, FLORENT</au><au>MUNOZ, FRANÇOIS</au><au>PAILLER, THIERRY</au><au>KOTTKE, INGRID</au><au>GONNEAU, CÉDRIC</au><au>SELOSSE, MARC-ANDRÉ</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>The role of epiphytism in architecture and evolutionary constraint within mycorrhizal networks of tropical orchids</atitle><jtitle>Molecular ecology</jtitle><addtitle>Mol Ecol</addtitle><date>2012-10</date><risdate>2012</risdate><volume>21</volume><issue>20</issue><spage>5098</spage><epage>5109</epage><pages>5098-5109</pages><issn>0962-1083</issn><eissn>1365-294X</eissn><abstract>Characterizing the architecture of bipartite networks is increasingly used as a framework to study biotic interactions within their ecological context and to assess the extent to which evolutionary constraint shape them. Orchid mycorrhizal symbioses are particularly interesting as they are viewed as more beneficial for plants than for fungi, a situation expected to result in an asymmetry of biological constraint. This study addressed the architecture and phylogenetic constraint in these associations in tropical context. We identified a bipartite network including 73 orchid species and 95 taxonomic units of mycorrhizal fungi across the natural habitats of Reunion Island. Unlike some recent evidence for nestedness in mycorrhizal symbioses, we found a highly modular architecture that largely reflected an ecological barrier between epiphytic and terrestrial subnetworks. By testing for phylogenetic signal, the overall signal was stronger for both partners in the epiphytic subnetwork. Moreover, in the subnetwork of epiphytic angraecoid orchids, the signal in orchid phylogeny was stronger than the signal in fungal phylogeny. Epiphytic associations are therefore more conservative and may co‐evolve more than terrestrial ones. We suggest that such tighter phylogenetic specialization may have been driven by stressful life conditions in the epiphytic niches. In addition to paralleling recent insights into mycorrhizal networks, this study furthermore provides support for epiphytism as a major factor affecting ecological assemblage and evolutionary constraint in tropical mycorrhizal symbioses.
See also the Perspective by Leake and Cameron</abstract><cop>Oxford, UK</cop><pub>Blackwell Publishing Ltd</pub><pmid>22765763</pmid><doi>10.1111/j.1365-294X.2012.05692.x</doi><tpages>12</tpages><orcidid>https://orcid.org/0000-0003-1213-5466</orcidid><orcidid>https://orcid.org/0000-0003-3471-9067</orcidid><orcidid>https://orcid.org/0000-0002-6854-9126</orcidid><orcidid>https://orcid.org/0000-0001-8776-4705</orcidid></addata></record> |
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| ispartof | Molecular ecology, 2012-10, Vol.21 (20), p.5098-5109 |
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| language | eng |
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| source | MEDLINE; Wiley Online Library Journals Frontfile Complete |
| subjects | Biological Evolution co-evolution DNA, Fungal - genetics DNA, Ribosomal Spacer - genetics Evolutionary biology Fungi interaction networks Life Sciences Models, Genetic modularity Molecular Sequence Data Mycorrhizae - classification Mycorrhizae - genetics nestedness orchid mycorrhizal symbiosis Orchidaceae Orchidaceae - genetics Orchidaceae - microbiology phylogenetic bipartite signal Phylogenetics Phylogeny Plant ecology Plant Roots - microbiology Reunion Sequence Analysis, DNA Symbiosis - genetics Taxonomy Vegetal Biology |
| title | The role of epiphytism in architecture and evolutionary constraint within mycorrhizal networks of tropical orchids |
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