These authors contributed equally to this work.
The evolution of seed dormancy: environmental cues, evolutionary hubs, and diversification of the seed plants
Article first published online: 28 MAR 2014
© 2014 The Authors. New Phytologist © 2014 New Phytologist Trust
Volume 203, Issue 1, pages 300–309, July 2014
How to Cite
Willis, C. G., Baskin, C. C., Baskin, J. M., Auld, J. R., Venable, D. L., Cavender-Bares, J., Donohue, K., Rubio de Casas, R. and The NESCent Germination Working Group (2014), The evolution of seed dormancy: environmental cues, evolutionary hubs, and diversification of the seed plants. New Phytologist, 203: 300–309. doi: 10.1111/nph.12782
The NESCent Germination Working Group members are in Appendix 1.
- Issue published online: 28 MAY 2014
- Article first published online: 28 MAR 2014
- Manuscript Accepted: 26 FEB 2014
- Manuscript Received: 3 FEB 2014
- National Evolutionary Synthesis Center
- National Science Foundation. Grant Number: EF-0905606
- European Union. Grant Number: MC-IIF-2011-300026
- environmental cueing;
- physiological dormancy;
- Seed dormancy, by controlling the timing of germination, can strongly affect plant survival. The kind of seed dormancy, therefore, can influence both population and species-level processes such as colonization, adaptation, speciation, and extinction.
- We used a dataset comprising over 14 000 taxa in 318 families across the seed plants to test hypotheses on the evolution of different kinds of seed dormancy and their association with lineage diversification.
- We found morphophysiological dormancy to be the most likely ancestral state of seed plants, suggesting that physiologically regulated dormancy in response to environmental cues was present at the origin of seed plants. Additionally, we found that physiological dormancy (PD), once disassociated from morphological dormancy, acted as an ‘evolutionary hub’ from which other dormancy classes evolved, and that it was associated with higher rates of lineage diversification via higher speciation rates.
- The environmental sensitivity provided by dormancy in general, and by PD in particular, appears to be a key trait in the diversification of seed plants.