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《Acta Agriculturae Boreall—sinica》 2003-01
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The Research on the Regulation of Enzymes During Dormancy and Dormancy Releasing

WANG Peng,LIAN Yong,JIN Liping(Institute of Vegetables and Flowers,Chinese Academy of Agricultural Sciences,Beijing100081,China)  
By analysis of the enzymes related to dormancy,it was found that activities of amylase and activities of amylophosphorylase in dormant microtubers were much lower than these in dormant released tubers.It can be concluded that energy was supplied 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 concentration of IAA.Dormancy and dormancy releasing could be regulated by peroxidase since high active peroxidase reduced concentration of IAA which affected tuber dormant releasing.The results also showed polyphenol oxidase activity 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 regulated the respiration metabolism during potato tuber dormancy as it was the enzyme related to respiration.
【Fund】: 国家自然科学基金资助项目(30070524)
【CateGory Index】: S532
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