Ecological, (epi)genetic and physiological aspects of bet-hedging in angiosperms.
Bet-hedging
Eco-physiology
Fitness
Heteromorphism
Seed dormancy
Soil seed bank
Journal
Plant reproduction
ISSN: 2194-7961
Titre abrégé: Plant Reprod
Pays: Germany
ID NLM: 101602701
Informations de publication
Date de publication:
03 2021
03 2021
Historique:
received:
28
09
2020
accepted:
28
12
2020
pubmed:
16
1
2021
medline:
20
5
2021
entrez:
15
1
2021
Statut:
ppublish
Résumé
Bet-hedging is a complex evolutionary strategy involving morphological, eco-physiological, (epi)genetic and population dynamics aspects. We review these aspects in flowering plants and propose further research needed for this topic. Bet-hedging is an evolutionary strategy that reduces the temporal variance in fitness at the expense of a lowered arithmetic mean fitness. It has evolved in organisms subjected to variable cues from the external environment, be they abiotic or biotic stresses such as irregular rainfall or predation. In flowering plants, bet-hedging is exhibited by hundreds of species and is mainly exerted by reproductive organs, in particular seeds but also embryos and fruits. The main example of bet-hedging in angiosperms is diaspore heteromorphism in which the same individual produces different seed/fruit morphs in terms of morphology, dormancy, eco-physiology and/or tolerance to biotic and abiotic stresses in order to 'hedge its bets' in unpredictable environments. The objective of this review is to provide a comprehensive overview of the ecological, genetic, epigenetic and physiological aspects involved in shaping bet-hedging strategies, and how these can affect population dynamics. We identify several open research questions about bet-hedging strategies in plants: 1) understanding ecological trade-offs among different traits; 2) producing more comprehensive phylogenetic analyses to understand the diffusion and evolutionary implications of this strategy; 3) clarifying epigenetic mechanisms related to bet-hedging and plant responses to environmental cues; and 4) applying multi-omics approaches to study bet-hedging at different levels of detail. Clarifying those aspects of bet-hedging will deepen our understanding of this fascinating evolutionary strategy.
Identifiants
pubmed: 33449209
doi: 10.1007/s00497-020-00402-z
pii: 10.1007/s00497-020-00402-z
pmc: PMC7902588
doi:
Types de publication
Journal Article
Research Support, Non-U.S. Gov't
Review
Langues
eng
Sous-ensembles de citation
IM
Pagination
21-36Références
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