ISHS Acta Horticulturae 547: III International Symposium on Rose Research and Cultivation
TOPOPHYSIC INFLUENCES ON ROSE BUD AND SHOOT GROWTH AND FLOWER DEVELOPMENT ARE DETERMINED BY ENDOGENOUS AXILLARY BUD FACTORS |
| Authors: | N. Bredmose, J. Hansen, J. Nielsen |
| Keywords: | axillary bud growth, cuttings, endogenous growth regulation, positional effect, Rosa hybrida, single-stemmed rose plants, topophysis |
| DOI: | 10.17660/ActaHortic.2001.547.21 |
| Abstract:
Topophysis, the influence of position of axillary buds along the shoot on bud and shoot growth, fresh biomass accumulation, and flower development were studied. Single-node cuttings with five-leaflet-leaves were excised from nine stem positions and grown as single-stemmed rose plants. Generally, onset of axillary bud growth and initial shoot growth were promoted, and flower height and bloom quality were reduced in plants from apical bud positions. Stem diameter, stem growth rate, and biomass build-up were greatest from medial bud positions; the plastochron was greater; and stems and internodes were longer from basal bud positions. Flower diameter and cut flower vase life were not significantly influenced by topophysis. The results demonstrate that topophysis can determine the potential for plant growth and development in roses and that this knowledge may be used to regulate growth. Results indicate that endogenous factors in the bud determine axillary bud growth, but the physiology of topophysis is still unclear | |
Download Adobe Acrobat Reader (free software to read PDF files) | |
