ศูนย์นวัตกรรมเทคโนโลยีหลังการเก็บเกี่ยว

Effect of low temperature, desprouting and gibberellic acid treatment on little tuber formation on potatoes during storage.

Ezekiel, R.; Vijay Paul; Brajesh Singh; Archana Peshin; Shekhawat, G. S.;

Journal of the Indian Potato Association Year: 2000 Vol: 27 Issue: 1/2 Pages: 13-23 Ref: 22 ref.

2000

บทคัดย่อ

Effect of low temperature, desprouting and GA treatment on the initiation and development of little tubers on physiologically old mother tubers during storage was investigated during 1995-98. In tubers stored at 20 deg C and desprouted thrice, initiation of little tubers occurred 214 days after harvest. However, in tubers subjected to high temperature (20 deg C) with desprouting for different periods followed by low temperature treatment (4 deg C) for different periods, it took at least 325 days for initiation of little tubers. When the tubers were subjected to low temperature (4 deg C) treatment for 197 days followed by storage at 20 deg C with desprouting twice, initiation of little tubers occurred after 315 days. The number of little tubers produced per mother tuber ranged from 2 to 9, depending upon the cultivar. The proportion of little tubers weighing less than 0.5 g was as high as 75% in Kufri Sutlej. Cultivars differed in their responses to the treatments. While Kufri Chandramukhi produc

ed, on average, nine little tubers per mother tuber, Kufri Jyoti and Kufri Badshah produced only two little tubers per mother tuber. When the dormancy of mother tubers was broken by treatment with GA and thiourea, sprout growth started early but little tuber formation was severely affected. Total sugars, reducing sugars, soluble protein, free amino acids and total phenols were determined periodically in the mother tubers. There was no evidence of a threshold level of these biochemical constituents at which little tuber formation would occur.