Abstract:

The effect of bromoethane on potato dormancy and the change of intrinsic hormones in the process were studied in this paper, while the mechanisms of dormancy released by bromoethane were explored in hormones. It was prospected to give information to micro-tuber dormancy released in production. Dormancy time, sprouting time, intrinsic hormones were measured in this experiment in micro-tuber of ‘Favorita’, ‘Atlantic’, and ‘Kexin 1’.The results were as follows: The suitable concentration of bromoethane can shorten dormancy time over 30 days, and the effect was significant. IAA and ABA contents were higher than GA and ZR contents in micro-tubers. The changes of GA and ZR contents were all sink peak curves, and the peaks appeared earlier by bromoethane; GA content was higher than that in control in early stage of experiment. Bromoethane possibly regulated GA and ZR contents to break micro-tuber dormancy.