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Is There More to Wi...
Is There More to Within-plant Variation in Seed Size than Developmental Noise?
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- Pélabon, Christophe (author)
- Norwegian University of Science and Technology
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- De Giorgi, Francesca (author)
- German Centre for Integrative Biodiversity Research (iDiv),Norwegian University of Science and Technology
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- Opedal, Øystein H. (author)
- Lund University,Lunds universitet,Biodiversitet,Biologiska institutionen,Naturvetenskapliga fakulteten,Artbildning, anpassning och samevolution,Forskargrupper vid Lunds universitet,Biodiversity,Department of Biology,Faculty of Science,Speciation, Adaptation and Coevolution,Lund University Research Groups
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- Bolstad, Geir H. (author)
- Norwegian Institute for Nature Research
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- Raunsgard, Astrid (author)
- Norwegian Institute for Nature Research
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- Scott Armbruster, W. (author)
- University of Alaska Fairbanks,University of Portsmouth
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(creator_code:org_t)
- 2021-07-08
- 2021
- English.
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In: Evolutionary Biology. - : Springer Science and Business Media LLC. - 0071-3260 .- 1934-2845. ; 48:3, s. 366-377
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Abstract
Subject headings
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- Within-plant variation in seed size may merely reflect developmental instability, or it may be adaptive in facilitating diversifying bet-hedging, that is, production of phenotypically diverse offspring when future environments are unpredictable. To test the latter hypothesis, we analyzed patterns of variation in seed size in 11 populations of the perennial vine Dalechampia scandens grown in a common greenhouse environment. We tested whether population differences in the mean and variation of seed size covaried with environmental predictability at two different timescales. We also tested whether within-plant variation in seed size was correlated with independent measures of floral developmental instability and increased under stressful conditions. Populations differed genetically in the amount of seed-size variation occurring among plants, among infructescences within plants, and among seeds within infructescences. Within-individual variation was not detectably correlated with measures of developmental instability and did not increase under stress, but it increased weakly with short-term environmental unpredictability of precipitation at the source-population site. These results support the hypothesis that greater variation in seed size is adaptive when environmental predictability is low.
Subject headings
- NATURVETENSKAP -- Biologi -- Evolutionsbiologi (hsv//swe)
- NATURAL SCIENCES -- Biological Sciences -- Evolutionary Biology (hsv//eng)
Keyword
- Bet-hedging
- Canalization
- Development
- Developmental stability
- Dormancy
- Fluctuating asymmetry
- Seed mass
- Seed maturation
Publication and Content Type
- art (subject category)
- ref (subject category)
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