Alterations in endogenous levels of cytokinins following grafting of Pinus radiata support ratio of cytokinins as an index of ageing and vigour
Markers for ageing or maturation in woody plants provides the possibility of identifying genotypes with a prolonged juvenile phase, or to evaluate reinvigoration procedures, such as grafting of adult material. This study focuses specifically on cytokinins (Cks) as markers, due to their role in the t...
| Veröffentlicht in: | Journal of plant physiology. - 1979. - 160(2003), 11 vom: 27. Nov., Seite 1407-10 |
|---|---|
| 1. Verfasser: | |
| Weitere Verfasser: | , |
| Format: | Aufsatz |
| Sprache: | English |
| Veröffentlicht: |
2003
|
| Zugriff auf das übergeordnete Werk: | Journal of plant physiology |
| Schlagworte: | Journal Article Research Support, Non-U.S. Gov't Biomarkers Cytokinins N(6)-(delta(2)-isopentenyl)adenine 2365-40-4 Isopentenyladenosine 7724-76-7 Zeatin 7I6OOJ9GR6 mehr... |
| Zusammenfassung: | Markers for ageing or maturation in woody plants provides the possibility of identifying genotypes with a prolonged juvenile phase, or to evaluate reinvigoration procedures, such as grafting of adult material. This study focuses specifically on cytokinins (Cks) as markers, due to their role in the transition process from juvenile to adult states. Previous reports from our group disclosed that the ratio of isopentenyladenine-type (iP-type) to zeatin-type (Z-type) Cks decreases during tree maturation, a maturation and ageing index being likely in Pinus radiata. Based on these results, Cks were tested in terminal buds of adult and grafted adult P. radiata material to corroborate the importance of the aforementioned balance as an index in the reinvigoration process of adult trees associated with grafting procedures. Results revealed the reversion of this index pattern parallel to the reactivation of some juvenile traits, namely, increasing values of the ratio throughout the reinvigoration process. According to previous results, however, the opposite was the case during the reverse process. This fact allowed us to validate the iP-type/Z-type Ck ratio as an ageing and vigour index |
|---|---|
| Beschreibung: | Date Completed 22.03.2004 Date Revised 30.09.2020 published: Print Citation Status MEDLINE |
| ISSN: | 1618-1328 |