The Potential for Evolutionary Responses to Cell-Lineage Selection on Growth Form and Its Plasticity in a Red Seaweed

Monro, Keyne and Poore, Alistair G. B. (2009) The Potential for Evolutionary Responses to Cell-Lineage Selection on Growth Form and Its Plasticity in a Red Seaweed. American Naturalist, 173 2: 151-163. doi:10.1086/595758

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Author Monro, Keyne
Poore, Alistair G. B.
Title The Potential for Evolutionary Responses to Cell-Lineage Selection on Growth Form and Its Plasticity in a Red Seaweed
Journal name American Naturalist   Check publisher's open access policy
ISSN 0003-0147
1537-5323
Publication date 2009-02-01
Sub-type Article (original research)
DOI 10.1086/595758
Open Access Status File (Publisher version)
Volume 173
Issue 2
Start page 151
End page 163
Total pages 13
Place of publication Chicago, IL, United States
Publisher University of Chicago Press
Language eng
Formatted abstract
Despite much theoretical discussion on the evolutionary significance of intraclonal genetic variation, particularly for modular organisms whose lack of germ-soma segregation allows for variants arising in clonal growth to contribute to evolutionary change, the potential of this variation to fuel adaptation remains surprisingly untested. Given intraclonal variation, mitotic cell lineages, rather than sexual offspring, may frequently act as units of selection. Here, we applied artificial selection to such lineages in the branching red seaweed Asparagopsis armata, targeting aspects of clonal growth form and growth-form plasticity that enhance light acquisition on patchy subtidal reefs and predicting that a genetic basis to intraclonal variation may promote significant responses that cannot accompany phenotypic variation alone. Cell-lineage selection increased variation in branch proliferation among A. armata genets and successfully altered its plasticity to light. Correlated responses in the plasticity of branch elongation, moreover, showed that cell-lineage selection may be transmitted among the plasticities of growth-form traits in A. armata via pleiotropy. By demonstrating significant responses to cell-lineage selection on growth-form plasticity in this seaweed, our study lends support to the notion that intraclonal genetic variation may potentially help clonal organisms to evolve adaptively in the absence of sex and thereby prove surprisingly resilient to environmental change.
Keyword Cell-lineage selection
Intraclonal variation
Modular organisms
Mosaicism
Plasticity
Seaweed
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collection: School of Biological Sciences Publications
 
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Citation counts: TR Web of Science Citation Count  Cited 11 times in Thomson Reuters Web of Science Article | Citations
Scopus Citation Count Cited 12 times in Scopus Article | Citations
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Created: Thu, 03 Sep 2009, 18:57:36 EST by Mr Andrew Martlew on behalf of School of Biological Sciences