ISHS Acta Horticulturae 323: Symposium on Soil and Soilless Media under Protected Cultivation in Mild Winter Climates
IMPROVEMENTS IN CHILLING TOLERANCE OF TOMATO SEEDLINGS BY GLK-8903 |
| Authors: | S.M. Singer, A.F. Abou-Hadid, P.H. Li |
| Abstract:
Tomato (Lycopersicon esculentum Mill.c.v. Sunny) seedlings, at the three leaf stage, were used to test the effect of GLK-8903 on protecting the plants from chilling injury. Plants were foliar sprayed with GLK-8903 at concentrations of 0.5 % and 1 % in a greenhouse. One d after spraying, plants were chilled at 5 C day/night in a cold room for 7 d. During the 7 d chilling period leaf conductivity was measured. Control plants showed an increase in electrlyte leakage from 11.4% at 1 d to 51.7 % at 7 d, whereas treated plants showed less leakage. Differences in electrolyte leakage were not significant between the control and treated plants at 1 d and at 7 d. However, electrolyte leakage was significantly different in treated plants between 2 and 6 d as compared to the control. Post stress growth observations showed that treated plants were taller, flowered earlier (6-7 d), had more fruits with a higher yield per plant (e.g. large size of fruits) than those of the controls. | |
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