ISHS Acta Horticulturae 56: Symposium on Juvenility in Woody Perennials
JUVENILITY AND MATURITY OF PLANTS AS INFLUENCED BY THEIR ONTOGENETICAL AND PHYSIOLOGICAL AGEING |
| Authors: | E.J. Fortanier, H. Jonkers |
| Abstract:
An evaluation of literature leads to the conclusion that ageing and senescence can be related to ontogenetical and physiological causes. Ontogenetical ageing is genetically programmed, localized in the meristems, not related to exhaustion, and cannot easily be reversed. This implies important consequences for vegetative multiplication and for the characteristics of clones obtained. Physiological ageing is correlatively influenced, caused by an increased disorganization and exhaustion, and is not localized in the meristems. When not advanced, a reversal is possible. Senescence regards more often the physiological ageing, but may be of ontogenetical nature. | |
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