Seed germination variability : why do genetically identical seeds not germinate at the same time?
© The Author(s) 2023. Published by Oxford University Press on behalf of the Society for Experimental Biology. All rights reserved. For permissions, please email: journals.permissionsoup.com.
| Publié dans: | Journal of experimental botany. - 1985. - 74(2023), 12 vom: 27. Juni, Seite 3462-3475 |
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| Auteur principal: | |
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| Format: | Article en ligne |
| Langue: | English |
| Publié: |
2023
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| Accès à la collection: | Journal of experimental botany |
| Sujets: | Review Journal Article Research Support, Non-U.S. Gov't Arabidopsis bet-hedging germination seed dormancy seeds wild alleles |
| Résumé: | © The Author(s) 2023. Published by Oxford University Press on behalf of the Society for Experimental Biology. All rights reserved. For permissions, please email: journals.permissionsoup.com. For survival in the natural environment, plants have evolved a 'bet-hedging' strategy where individual variation is high and a range of phenotypes is produced. When faced with unpredictable environmental conditions, fluctuation in seed behaviour is a beneficial trait that allows plant species to survive, particularly if seedlings from early-germinated seeds die. However, this is not a desired trait from an agricultural perspective, where a set of uniformly growing seedlings is required. Whilst variability in seed behaviour is unavoidable, over the centuries humans have attempted to select seeds with minimum variability for agricultural use. In the model plant Arabidopsis, even non-stratified seeds in the same silique germinate variably, and it remains elusive how this variability is manifested from genes to a physiological outcome and what molecular mechanisms of bet-hedging facilitate this diversity. Will the re-introduction of valuable wild alleles into domesticated crops contribute to this variability between individual seeds by promoting bet-hedging? Recent advances have shed light on possible molecular pathways of germination that are affected at the level of single seeds and single cells. Here, we review the hormonal, molecular, and cellular mechanisms that might affect the germination outcome of individual genetically identical seeds |
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| Description: | Date Completed 29.06.2023 Date Revised 29.06.2023 published: Print Citation Status MEDLINE |
| ISSN: | 1460-2431 |
| DOI: | 10.1093/jxb/erad101 |