ISHS Acta Horticulturae 396: Hydroponics and Transplant Production
EFFECT OF WATER STRESS ON THE FRUIT YIELD, QUALITY AND PHYSIOLOGICAL CONDITION OF TOMATO PLANTS USING THE GRAVEL CULTURE |
| Authors: | Y. Shinohara, K. Akiba, T. Maruo, T. Ito |
| Keywords: | Tomato, Lycopercicon esculentum, Gravel culture, Water stress, Yield, Quality, Photosynthesis |
| Abstract:
Effects of water stress on the yield, quality, photosynthesis, transpiration and photosynthates translocation of tomato were evaluated. Water stress treatments were performed using tomato cv. 'Momotaro' plants grown by porous volcanic gravel culture with different amount of solution supply. Fruit yield was decreased but Brix value was increased with increasing water stress. Photosynthesis and transpiration were markedly inhibited immediately after receiving the water stress, but gradually recovered after continuous stress treatment. The translocation of photosynthates from source leaf to fruit was promoted with water stress using 13CO2 as tracer in the model experiment which the plants were trimmed into single fruit with 3 or 5 leaves. Water stress relatively promotes the photosynthates translocation into fruit and improves the fruit quality, whereas it inhibits the photosynthesis and transpiration. Therefore, establishment of control method of stress extent based on the focused yield and Brix value is thought to be important. | |
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