ISHS Acta Horticulturae 394: Plant Bioregulators in Horticulture
BIOLOGICAL ACTIVITY OF A NEW CHEMICAL AGENT FOR PEACH FLOWER THINNING |
| Authors: | G. Costa, G. Vizzotto, C. Malossini, A. Ramina |
| Keywords: | Prunus persica, Pollen germination, Pollen tube growth, Anther dehiscence |
| Abstract:
In favourable climatic conditions, peach trees usually overset and fruit thinning is necessary to increase fruit size and to maintain regular bearing. This study examined the activity of Armothin, a fatty acid amine polymer as a chemical thinning agent for peach flowers. The mode of action of this compound and its efficacy at different floral stages was examined by determining its effect on another dehiscence, pollen viability and pollen tube growth with 'in vivo' and 'in vitro' experiments. Armothin caused earlier anther dehiscence, strong reduction of pollen germination and pollen tube growth within the stylar tissue soon after germination had occurred. Results obtained on pollen tube growth suggested an efficacy of the compound related to the flower stage: the earlier the treatment the more effective the compound. | |
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