Temporal patterns of local adaptation in soil pseudomonads
Identifieur interne : 000598 ( Main/Exploration ); précédent : 000597; suivant : 000599Temporal patterns of local adaptation in soil pseudomonads
Auteurs : Susanne A. Kraemer [Royaume-Uni] ; Rees Kassen [Canada]Source :
- Proceedings of the Royal Society B: Biological Sciences [ 0962-8452 ] ; 2016.
Abstract
Strong divergent selection leading to local adaptation is often invoked to explain the staggering diversity of bacteria in microbial ecosystems. However, examples of specialization by bacterial clones to alternative niches in nature are rare. Here, we investigate the extent of local adaptation in natural isolates of pseudomonads and their relatives to their soil environments across both space and time. Though most isolates grew well in most environments, patchily distributed low-quality environments were found to drive specialization. In contrast to experimental evolution work on microbial adaptation, temporal adaptation was stronger than spatial adaptation among the isolates and environments we sampled. Time-shift analysis of fitness across two seasons of growth revealed an unexpectedly strong effect of preadaptation. This pattern of apparent future adaptation may be caused by unknown abiotic properties of these environments, phages, bacterial competitors or general mechanisms of ecological niche release, and warrants future study.
Url:
DOI: 10.1098/rspb.2016.1652
PubMed: 27708150
PubMed Central: 5069515
Affiliations:
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Kraemer</name><affiliation wicri:level="1"><nlm:aff id="af1"><addr-line>Institute of Evolutionary Biology</addr-line>,<institution>University of Edinburgh</institution>,<addr-line>Ashworth Laboratories, Charlotte Auerbach Road, Edinburgh EH9 3FL</addr-line>,<country>UK</country></nlm:aff><country xml:lang="fr">Royaume-Uni</country><wicri:regionArea># see nlm:aff country strict</wicri:regionArea></affiliation></author><author><name sortKey="Kassen, Rees" sort="Kassen, Rees" uniqKey="Kassen R" first="Rees" last="Kassen">Rees Kassen</name><affiliation wicri:level="1"><nlm:aff id="af2"><institution>University of Ottawa</institution>,<addr-line>Ottawa, Ontario</addr-line>,<country>Canada</country></nlm:aff><country xml:lang="fr">Canada</country><wicri:regionArea># see nlm:aff country strict</wicri:regionArea></affiliation></author></analytic><series><title level="j">Proceedings of the Royal Society B: Biological Sciences</title><idno type="ISSN">0962-8452</idno><idno type="eISSN">1471-2954</idno><imprint><date when="2016">2016</date></imprint></series></biblStruct></sourceDesc></fileDesc><profileDesc><textClass></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en"><p>Strong divergent selection leading to local adaptation is often invoked to explain the staggering diversity of bacteria in microbial ecosystems. However, examples of specialization by bacterial clones to alternative niches in nature are rare. Here, we investigate the extent of local adaptation in natural isolates of pseudomonads and their relatives to their soil environments across both space and time. Though most isolates grew well in most environments, patchily distributed low-quality environments were found to drive specialization. In contrast to experimental evolution work on microbial adaptation, temporal adaptation was stronger than spatial adaptation among the isolates and environments we sampled. Time-shift analysis of fitness across two seasons of growth revealed an unexpectedly strong effect of preadaptation. This pattern of apparent future adaptation may be caused by unknown abiotic properties of these environments, phages, bacterial competitors or general mechanisms of ecological niche release, and warrants future study.</p></div></front></TEI><affiliations><list><country><li>Canada</li><li>Royaume-Uni</li></country></list><tree><country name="Royaume-Uni"><noRegion><name sortKey="Kraemer, Susanne A" sort="Kraemer, Susanne A" uniqKey="Kraemer S" first="Susanne A." last="Kraemer">Susanne A. Kraemer</name></noRegion></country><country name="Canada"><noRegion><name sortKey="Kassen, Rees" sort="Kassen, Rees" uniqKey="Kassen R" first="Rees" last="Kassen">Rees Kassen</name></noRegion></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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