Clinal population divergence in an adaptive parental environmental effect that adjusts seed banking

© 2017 The Authors. New Phytologist © 2017 New Phytologist Trust.

Bibliographische Detailangaben
Veröffentlicht in:The New phytologist. - 1979. - 214(2017), 3 vom: 02. Mai, Seite 1230-1244
1. Verfasser: Lampei, Christian (VerfasserIn)
Weitere Verfasser: Metz, Johannes, Tielbörger, Katja
Format: Online-Aufsatz
Sprache:English
Veröffentlicht: 2017
Zugriff auf das übergeordnete Werk:The New phytologist
Schlagworte:Journal Article bet-hedging clinal variation environmental autocorrelation maternal effect parental effect risk spreading seed dormancy transgenerational plasticity
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245 1 0 |a Clinal population divergence in an adaptive parental environmental effect that adjusts seed banking 
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520 |a Bet-hedging via between-year seed dormancy is a costly strategy for plants in unpredictable environments. Theoretically, fitness costs can be reduced through a parental environmental effect when the environment is partly predictable. We tested whether populations from environments that differ in predictability diverged in parental effects on seed dormancy. Common garden-produced seeds of the two annual plant species Biscutella didyma and Bromus fasciculatus collected along an aridity gradient were grown under 12 irrigation treatments. Offspring germination was evaluated and related to environmental correlations between generations and their fitness consequences at the four study sites. One species exhibited strong seed dormancy that increased with unpredictability in seasonal precipitation. The parental effect on seed dormancy also increased proportionally with the environmental correlation between precipitation in the parental season and seedling density in the following season; this correlation increased from mesic to arid environments. Because fitness was negatively related to density, this parental effect may be adaptive. However, the lack of dormancy in the second species indicates that bet-hedging is not the only strategy for annual plants in arid environments. Our results provide the first evidence for clinal variation in the relative strength of parental effects along environmental gradients 
650 4 |a Journal Article 
650 4 |a bet-hedging 
650 4 |a clinal variation 
650 4 |a environmental autocorrelation 
650 4 |a maternal effect 
650 4 |a parental effect 
650 4 |a risk spreading 
650 4 |a seed dormancy 
650 4 |a transgenerational plasticity 
700 1 |a Metz, Johannes  |e verfasserin  |4 aut 
700 1 |a Tielbörger, Katja  |e verfasserin  |4 aut 
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