Gentian homologue of OIL BODY-ASSOCIATED PROTEIN 1 is the key to a novel mechanism of growth recovery from cold stress via triacylglycerol hydrolysis
Copyright © 2025 The Authors. Published by Elsevier B.V. All rights reserved.
| Publié dans: | Plant science : an international journal of experimental plant biology. - 1985. - 359(2025) vom: 15. Aug., Seite 112616 |
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| Auteur principal: | |
| Autres auteurs: | , , , , |
| Format: | Article en ligne |
| Langue: | English |
| Publié: |
2025
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| Accès à la collection: | Plant science : an international journal of experimental plant biology |
| Sujets: | Journal Article Bud dormancy Chilling stress Growth recovery Japanese gentian OBAP1 Oil body Triglycerides Plant Proteins |
| Résumé: | Copyright © 2025 The Authors. Published by Elsevier B.V. All rights reserved. Ecodormancy is one of the dormancy phases in perennials during which bud growth is inhibited by unfavorable environmental factors. During ecodormancy, perennial winter buds can withstand chilling and frost and are ready to grow when temperatures rise. However, little is known about genetic regulation during ecodormancy, especially in herbaceous perennials. We performed de novo RNA sequencing to identify ecodormancy-related genes in gentians (Gentiana triflora) and found a homologue of Arabidopsis OIL BODY-ASSOCIATED PROTEIN1, GtOBAP1. We also found that GtOBAP1 expression was increased by chilling, accompanied by oil body formation in vegetative tissues. A series of obap1 mutants showed abnormal accumulation of oil bodies and suppression of growth recovery after release from chilling stress. Triacylglycerol hydrolysis was suppressed in obap1 mutants, which presumably resulted in reduced available energy for growth recovery. Our results revealed a new role of OBAP1 and oil bodies and suggested the possibility of a triacylglycerol-mediated mechanism in growth recovery as well as the sprouting of perennial buds |
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| Description: | Date Completed 12.08.2025 Date Revised 12.08.2025 published: Print-Electronic Citation Status MEDLINE |
| ISSN: | 1873-2259 |
| DOI: | 10.1016/j.plantsci.2025.112616 |