THE INFLUENCE OF LOW TEMPERATURE ON THE MEMBRANE LIPID COMPOSITION AND FLOWERING CAPACITY OF TULIP BULBS.
The shoot showed a cold induced increase of the total lipid content. There was no change of the total lipid content on the basal plate and the scales. The most evident change occured in the fatty acid composition: An increase in the ratio linoleic acid/linolenic acid (18:2/18:3) was observed during incubation at 5°C but not at 17°C. This is only true for bulbs which were transferred to 5°C until about two months after the flower initiation. The ratio 18:2/18:3 of the basal plate and the scales didn't change as a consequence of the cold treatment.