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Effect of γ-aminobutyric acid (GABA) as a foliar application at 1 and 2mM on fruit yield of tomato plants cv “Super marmende” growing under normal (25°C/20°C day/night ) and chilling conditions (5 days/4ºC for 6h/day) followed by 2 days recovery. Data followed by the same letters ± SE are not significant according to Duncan multiple rang test at P≤0.05. The white columns refer to the control conditions and the black columns refer to the chilling stress.
