DEFINITION OF INDICATORS OF SENESCENCE IN THE ROSE : EFFECT OF THE APPLICATION OF PLANT HORMONES

Ph. Barthe, V. Vaillant, S. Gudin
The need for simple means of analysing vase life objectively has been stressed many times (Salunkhe et al., 1989). Trippi and Paulin (1984) have proposed a certain number of indicators of senescence for carnations, and the study of their evolution has made it possible to demonstrate that senescence in this species is a biphasic phenomenon. In order to carry out similar studies on the rose, we used parameters relating to water status and the properties of cell sap. Their modification with time reveals a continuous and, progressive evolution. There is also a good correlation between the different criteria.

These parameters appear to be good indicators of senescence since their evolution can be modified by a hormone treatment that has an effective impact on the vase-life of the flower. In particular, analysis of these parameters highlights the dual effect of abscisic acid according to the way it is applied: they reflect therefore, in objective terms, the observations already made concerning flower life (Halevy and Mayak, 1974). They also demonstrate the favourable effects of cytokin treatment.

Barthe, Ph., Vaillant, V. and Gudin, S. (1991). DEFINITION OF INDICATORS OF SENESCENCE IN THE ROSE : EFFECT OF THE APPLICATION OF PLANT HORMONES. Acta Hortic. 298, 61-68
DOI: 10.17660/ActaHortic.1991.298.5
https://doi.org/10.17660/ActaHortic.1991.298.5

Acta Horticulturae