SENSITIVITY TO PHOSPHORUS LIMITATION INCREASES WITH PLOIDY LEVEL IN A NEW ZEALAND SNAIL

Maurine Neiman; Adam D Kay; Amy C Krist

doi:10.1111/evo.12026

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SENSITIVITY TO PHOSPHORUS LIMITATION INCREASES WITH PLOIDY LEVEL IN A NEW ZEALAND SNAIL

Journal article

Open access

SENSITIVITY TO PHOSPHORUS LIMITATION INCREASES WITH PLOIDY LEVEL IN A NEW ZEALAND SNAIL

Maurine Neiman, Adam D Kay and Amy C Krist

Evolution, Vol.67(5), pp.1511-1517

05/2013

DOI: 10.1111/evo.12026

PMID: 23617926

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Abstract

Evolutionary and ecological factors that explain natural variation in ploidy level remain poorly understood. One intriguing possibility is that nutrient costs associated with higher per‐cell nucleic acid content could differentially influence the fitness of different ploidy levels. Here, we test this hypothesis by determining whether access to phosphorus (P), a main component of nucleic acids, differentially affects growth rate in asexual freshwater snails (Potamopyrgus antipodarum) that differ in ploidy. As expected if larger genomes generate higher dietary P requirements, tetraploid P. antipodarum experienced a more than twofold greater reduction in growth rate in low‐P versus high‐P conditions relative to triploids. Mirroring these results, tetraploid P. antipodarum also had a significant reduction in body P content under low P relative to high P, whereas triploid body P content was unaffected. Taken together, these results set the stage for the possibility that P availability could influence the distribution and relative frequency of P. antipodarum of different ploidy levels. These findings could be applicable to many other animal taxa featuring ploidy‐level variation, which includes many mixed sexual/asexual taxa.

Ecological stoichiometry

growth rate

phosphorus

polyploidy

Potamopyrgus antipodarum

sexual reproduction

Details

Title: Subtitle: SENSITIVITY TO PHOSPHORUS LIMITATION INCREASES WITH PLOIDY LEVEL IN A NEW ZEALAND SNAIL
Creators: Maurine Neiman - Department of Biology, University of Iowa
Adam D Kay - Department of Biology, University of St. Thomas, St. Paul
Amy C Krist - University of Wyoming
Resource Type: Journal article
Publication Details: Evolution, Vol.67(5), pp.1511-1517
DOI: 10.1111/evo.12026
PMID: 23617926
NLM abbreviation: Evolution
ISSN: 0014-3820
eISSN: 1558-5646
Number of pages: 7
Grant note: NSF‐MCB (1122176) NSF‐DEB (0842038) University of Iowa, Research Council of Norway (196468/V40)
Language: English
Date published: 05/2013
Academic Unit: Office Of The Provost; Gender, Women's and Sexuality Studies; Biology
Record Identifier: 9984217540902771

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