ISHS Acta Horticulturae 807: International Symposium on Strategies Towards Sustainability of Protected Cultivation in Mild Winter Climate
SENSITIVITY OF STEM DIAMETER VARIATIONS FOR DETECTING WATER STRESS IN TOMATO TRANSPLANTS |
| Authors: | M.E. Abdelaziz, R. Pokluda, P.J. Paschold |
| Keywords: | MXSD, MDS, SGR, solar radiation |
| Abstract:
The effect of water stress on the stem diameter and derived parameters was studied in the tomato transplants Lycopersicum esculentum Mill. cv. Pannovy under greenhouse conditions at Vegetable Crops Department, Geisenheim, Germany. Under 2 irrigation levels, 50 hPa (well irrigated control) and 500 hPa (water stress), data showed significant decrease in daily maximum stem diameter (MXSD) and accumulative stem diameter growth rate (SGR). Maximum daily shrinkage (MDS) increased significantly in the water stress transplants comparing to the control. Solar radiation affected positively stem growth rate and stem shrinkage in sunny days. In general, acquiring stem diameter derived indices measured by linear variable displacement transducer is a sensitive method to detect plant water status under water stress conditions. | |
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