Endogenous Hormone and Organic Matters in Buds of Kyoho Grape during Accelerating the Germination in Spring

Kyoho grape was employed as the plant materials.The plants were treated with the nitrolime to release dormancy.And the changes of the endogenous hormone and organic matter contents as well as amylase activity were detected during the dormancy release.The results are as follows.The winter bud sprouting was suppressed with the ABA levels dropping and the IAA levels raising.After the chemical induction of sprouting of the dormant winter buds,the accelerating degradation of the stored starch by the increasing activity of amylase.At first the protein levels drop and then it was hightened.Finally most of the winter buds were inducing to sprout.This experiment proved further that the GA3,ZR,IAA and ABA levels might be the key factors affecting the dormancy. And the ABA level was the key factor causing the winter buds dormancy sprouting.The buds dormancy is easier to be released if the ABA level is lower.