The Research on the Regulation of Enzymes During Dormancy and Dormancy Releasing

doi:10.3321/j.issn:1000-7091.2003.01.010

Abstract

Abstract: By analysis of the enzymes related to dormancy, it was found that activi t ies of amylase and ac t ivi ties of amylophosphorylase in dormant microtubers were much lower than these in dormant released tubers. It can be concluded hat energy was suppl ied by activating the amylase and amylophosphorylase during dormancy release. Peroxide activity was much higher in dormant microtubers than that in dormant released tubers.High active Peroxidase can reduce the concen tration of IAA. Dormancy and dormancy releasing could be regulated by peroxidase since high act iveperoxidase reduced concentration of IAA which affected tuber dormant releasing.The resul ts also sho wed polyphenol oxidase act ivity was higher in dormant microtubers than that in dormant released tubers. Polyphenol oxidase activity decreased lightly during dormancy breaking of potato microtubers. It inferred that polyphenol oxidase re gulated the respiration metabol ism during potato tuber dormancy as it was the enzyme related to respi ration.

Key words: Potato, Tuber, Dormancy, Activities of enzyme

CLC Number:

S532

WANG Peng, LIAN Yong, JIN Li ping. The Research on the Regulation of Enzymes During Dormancy and Dormancy Releasing[J]. ACTA AGRICULTURAE BOREALI-SINICA, 2003, 18(1): 33-36. doi: 10.3321/j.issn:1000-7091.2003.01.010.

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