Loss of type-IV glandular trichomes is a heterochronic trait in tomato and can be reverted by promoting juvenility
Copyright © 2017 Elsevier B.V. All rights reserved.
| Publié dans: | Plant science : an international journal of experimental plant biology. - 1985. - 259(2017) vom: 09. Juni, Seite 35-47 |
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| Auteur principal: | |
| Autres auteurs: | , , , , , , , |
| Format: | Article en ligne |
| Langue: | English |
| Publié: |
2017
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| Accès à la collection: | Plant science : an international journal of experimental plant biology |
| Sujets: | Journal Article Fasciated mutant Heteroblasty Juvenile phase Mouse ears mutant Woolly mutant microRNA156 MicroRNAs Plant Proteins |
| Résumé: | Copyright © 2017 Elsevier B.V. All rights reserved. Glandular trichomes are structures with widespread distribution and deep ecological significance. In the Solanum genus, type-IV glandular trichomes provide resistance to insect pests. The occurrence of these structures is, however, poorly described and controversial in cultivated tomato (Solanum lycopersicum). Optical and scanning electron microscopy were used to screen a series of well-known commercial tomato cultivars, revealing the presence of type-IV trichomes on embryonic (cotyledons) and juvenile leaves. A tomato line overexpressing the microRNA miR156, known to promote heterochronic development, and mutants affecting KNOX and CLAVATA3 genes possessed type-IV trichomes in adult leaves. A re-analysis of the Woolly (Wo) mutant, previously described as enhancing glandular trichome density, showed that this effect only occurs at the juvenile phase of vegetative development. Our results suggest the existence of at least two levels of regulation of multicellular trichome formation in tomato: one enhancing different types of trichomes, such as that controlled by the WOOLLY gene, and another dependent on developmental stage, which is fundamental for type-IV trichome formation. Their combined manipulation could represent an avenue for biotechnological engineering of trichome development in plants |
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| Description: | Date Completed 29.12.2017 Date Revised 07.12.2022 published: Print-Electronic Citation Status MEDLINE |
| ISSN: | 1873-2259 |
| DOI: | 10.1016/j.plantsci.2017.03.006 |