ศูนย์นวัตกรรมเทคโนโลยีหลังการเก็บเกี่ยว

The influence of low temperature on the membrane lipid composition and flowering capacity of tulip bulbs.

Walch, K. and Hasselt, P. R. van

Acta Horticulturae Year: 1991 Issue: No. 298 Pages: 345-353 Ref: 12 ref.

1991

บทคัดย่อ

Tulipa gesneriana bulbs (cv. Apeldoorn) were stored at 20 deg C until stage G. The bulbs were transferred to 5 deg or 17 deg on 10 Oct. 1988 and changes in the lipid composition of the shoot, the basal plate and the 3 outer scales were measured over the next 20 weeks. In a second experiment, bulbs were transferred to 5 deg after 0, 6, 12 or 18 weeks at 17 deg , and the lipid composition was determined on each of these dates and 24 and 30 weeks after transfer. Bulbs transferred after 6 weeks were at the same stage as the bulbs used in the first experiment. Shoot growth was almost linear at both storage temperatures, but was slower at 5 deg than at 17 deg . Total shoot lipid content increased on transfer to 5 deg . There was no change in the total lipid content of the basal plate and the scales. The linoleic acid:linolenic acid ratio in the shoot increased during storage at 5 deg but did not change during storage at 17 deg . In the second experiment, no change in the linoleic acid:linolenic acid ratio was observed when bulbs were transferred from 17 deg to 5 deg after 12 or 18 weeks. Transfer to low temperature had no effect on the linoleic acid:linolenic acid ratio in the basal plate or the scales.