Reinvigoration/Rejuvenation Induced through Micrografting of Tree Species: Signaling through Graft Union
| Autor: | Araceli Barceló-Muñoz, Isabel Narvaez, Isabel Vidoy-Mercado, Fernando Pliego-Alfaro, Richard E. Litz, Elena Palomo-Ríos |
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| Rok vydání: | 2021 |
| Předmět: |
0106 biological sciences
0301 basic medicine Vegetative reproduction Grafting (decision trees) rejuvenation Plant Science Review Biology rooting capacity 01 natural sciences 03 medical and health sciences in vitro grafting Juvenile Ecology Evolution Behavior and Systematics Rejuvenation Ecology Botany reinvigoration Horticulture 030104 developmental biology woody plants QK1-989 Shoot Rootstock Tree species long distance signaling 010606 plant biology & botany Woody plant |
| Zdroj: | Plants, Vol 10, Iss 1197, p 1197 (2021) Plants |
| ISSN: | 2223-7747 |
| Popis: | Trees have a distinctive and generally long juvenile period during which vegetative growth rate is rapid and floral organs do not differentiate. Among trees, the juvenile period can range from 1 year to 15–20 years, although with some forest tree species, it can be longer. Vegetative propagation of trees is usually much easier during the juvenile phase than with mature phase materials. Therefore, reversal of maturity is often necessary in order to obtain materials in which rooting ability has been restored. Micrografting has been developed for trees to address reinvigoration/rejuvenation of elite selections to facilitate vegetative propagation. Generally, shoots obtained after serial grafting have increased rooting competence and develop juvenile traits; in some cases, graft-derived shoots show enhanced in vitro proliferation. Recent advances in graft signaling have shown that several factors, e.g., plant hormones, proteins, and different types of RNA, could be responsible for changes in the scion. The focus of this review includes (1) a discussion of the differences between the juvenile and mature growth phases in trees, (2) successful restoration of juvenile traits through micrografting, and (3) the nature of the different signals passing through the graft union. |
| Databáze: | OpenAIRE |
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