ISHS Acta Horticulturae 453: IV International Protea Working Group Symposium
EFFECT OF THE POSITION OF CUTTINGS ALONG THE MOTHER STEM ON THE RHIZOGENESIS AND THE RAMIFICATION IN SOILLESS CULTIVATION |
| Authors: | M. Montarone, D. Savignac, P. Bearez |
| Abstract:
The main aim of this study was to understand the cutting position effect on the rooting and the future development of genus Protea plants. Cuttings from P. eximia / P. susannae cv. ‘Sylvia’ and cv. ‘Cardinal’ were carried out from Autumn 1994 to Spring 1995. An important variation of rooting ability depending on stem development state and cutting position was revealed. The best results were achieved for median positions on flower bud stems. In the same way, the effects of different growth regulator concentrations and dipping times were explored. Increased IBA concentration improved the rooting percentage, whereas the increase of dipping time had little effect on the auxin absorption rate. The observation of the rooted cuttings' development showed us that the branching ratio is especially affected by cutting vigor, i.e. the diameter and weight. A better choice of propagation material according to plant physiology and the control of cultivation conditions should conciliate growers' requirements with hard to root and to cultivate species. | |
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