ISHS Acta Horticulturae 228: IV International Symposium on Water Supply and Irrigation in the Open and under Protected Cultivation
EFFECTS OF SOIL MOISTURE STRESS ON LEAF AND ROOT GROWTH OF TWO PROCESSING TOMATOES |
| Author: | C.S. Tan |
| Abstract:
Two tomato cultivars (H-2653 and C-28) were grown on loamy sand soil in glass-faced boxes under constant environmental conditions. Four moisture stress treatments consisted of dry; medium dry; wet; and waterlogged. The root intensity of both tomato cultivars was the greatest in the wet treatment. There were relatively dense root systems at all depths in the medium dry treatment. The root intensity in the waterlogged treatment was high in the top 10 cm of soil but the rooting depth was markedly reduced as a result of stress induced by continuous flooding. In the dry treatment, the root intensity was reduced and the rooting depth of cultivar H-2653 was greater than that of C-28. The stomatal conductance of both cultivars was reduced by soil moisture stress. Water stress also caused reduction in leaf surface area, plant height, number of branches and in the oven dry weights of shoots and roots. | |
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