ISHS Acta Horticulturae 683: V International Symposium on New Floricultural Crops
ORNAMENTAL TOMATO GROWTH AND FRUITING RESPONSE TO PACLOBUTRAZOL |
| Authors: | P.J. de Moraes, J.A. Saraiva Grossi, S. de Araújo Tinoco, D.J. Henriques da Silva, P.R. Cecon, J.G. Barbosa |
| Keywords: | Lycopersicon esculentum, plant growth retardant, ornamental, pot plant |
| Abstract:
The effects of paclobutrazol on plant growth and fruiting characteristics in a new genetic access ‘468 BGH’ tomato, from Germoplasm Bank of Federal University of Viçosa, were examined in two experiments. In one experiment, paclobutrazol was foliar sprayed 3 times at concentrations of 0, 15, 30, 45, 60 and 75 mg ai•L-1. In a second experiment, paclobutrazol drenches were applied once at 0, 2, 4, 8, 16 and 32 mg ai•L-1. Plant heigth was 20% shorter as paclobutrazol concentrations increased up to 30 mg ai•L-1 for foliar application. Similar effects were observed with the internode length. Stem diameter increased as paclobutrazol concentrations increased up to 16 mg ai•L-1 for drench application. The plants exhibited smaller leaf area and higher chlorophyll content as the paclobutrazol concentrations increased. Increasing paclobutrazol concentrations decreased fruit diameter but increased the number of red fruits. The number of cluster per plant and the number of cluster with fruits increased linearly by increasing drench paclobutrazol concentrations. Paclobutrazol was effective on controlling growth and fruit characteristics of a potential ornamental tomato ‘468 BGH’. | |
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