Article | 04. 2016 Vol. 34, Issue. 2
Growth Characteristics of Grafted Tomato Seedlings following Treatment with Various Concentrations of Diniconazole during the Summer Growth Season

Department of Horticulture Industry, Wonkwang University1
Institute of Life Science and Natural Resources, Wonkwang University2
Department of Horticulture, Division of Applied Life Science, Graduate School, Gyeongsang National University3

2016.04. 249:256


This study was performed to investigate the effect of various concentrations of Diniconazole (DC) on the growth and quality of grafted tomato (Solanum lycopersicum) seedlings cultivated during the summer season. Concentrations of DC were set to 0 (non-treatment), 5, 10 and 20 mg·L-1, were treated once 3 days after grafting. Rootstock of the seedlings was shorter in the DC 5 mg·L-1 and 10 mg·L-1 treatment compared to the non-treatment, and the scions were significantly shorter in the DC 20 mg·L-1 treatment. Seedlings were significantly shorter in the DC 20 mg·L-1 treatment compared with the non-treatment. Leaf area was lower for seedlings subjected to all treatments than for seedlings in non-treatment group, and reduction was dose dependent. In particular, the DC 20 mg·L-1 treatment inhibited both leaf and stem growth. The fresh weighs of leaves and stems of the seedlings treated with DC 5 mg·L-1 and the fresh weights of roots subjected to all treatments were significantly greater than those of the non-treatment seedlings. Dry weight per organs of the seedlings treated with DC 5 mg·L-1 was significantly greater that of the non-treatment seedlings, but the dry weight of leaves of seedling treated with DC 20 mg·L-1 was much less than that of the non-treatment seedlings. The T/R ratio of the seedlings was lower for all treatments than for the non-treatment. The relative growth rate of the seedlings was significantly lower in the DC 20 mg·L-1 treatment and, the leaf area rate of seedlings was lower in the DC 5 mg·L-1 and 10 mg·L-1 treatment than in the non-treatment. Therefore, the optimal concentration of Dinoconazole used to produce a suitable grafted tomato seedling in the summer season is 10 mg·L-1 or less.

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