ISHS Acta Horticulturae 659: VII International Symposium on Protected Cultivation in Mild Winter Climates: Production, Pest Management and Global Competition
THE EFFECTS OF HIGH TEMPERATURE AND HIGH SALINITY STRESS ON SUMMER SINGLE-TRUSS TOMATO CULTIVATION |
| Authors: | T. Sato, S. Watanabe, Y. Nakano, H. Kawashima, M. Takaichi, S. Sogawa, T. Shinkawa, H. Nakashita, M. Yasuda, S. Yoshida |
| Keywords: | tomato, single-truss cultivation, heat acclimation, disease, pest |
| Abstract:
Hydroponic single-truss cultivation of tomatoes has many advantages over conventional cordon cultivation, including reduced labor, ease of growth, and high quality. The yield obtained using this method is the same as that using cordon cultivation, due to the high plant density and the multiple crops per year that are possible. However, poor growth, low quality, and the appearance of pests and diseases can hinder this cultivation method during summer. We assessed the growth characteristics, yield, quality, and heat acclimation ability of 19 tomato varieties under artificial high air temperature stress and high salinity (EC stress) induced by nutrient solution. A heat-tolerant variety that was identified was subjected to a temperature of 45°C for one hour. Diseases and pests, except for mites, were controlled well in healthy plants of this cultivar. This suggests that high temperature not only has a direct effect on tomato plants, but also enhances their disease tolerance. These results showed that single-truss tomato cultivation can be improved in summer using a heat-tolerant variety and brief high-temperature treatment. | |
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