A study advance on effect of temperature on fruit trees bud dormancy

Dormancy of temperate zone deciduous fruit trees allow the trees to reserve cold climate conditions during the winter. Recent years' study indicates that dormancy can not only let fruit trees survive cold winter, but be a necessary procedure for deciduous fruit trees to bloom and fruit normally next year. The definition of dormancy process, the determination of dormancy depth and the effect of temperature on dormancy are the theoretical foundation of fruit trees bud dormancy study. The dormancy of deciduous fruit trees could be divided into three parts, para dormancy, endo dormancy and eco dormancy. Low temperature could improve to break dormancy There are three methods to determinate the end time of fruit trees bud dormancy: 7.2℃ low temperature model, Utah model and dynamic model. But there are two different reviews about the effect of high temperature: some believe that high temperature could counteract the effect of low temperature, others believe that high temperature could improve to break dormancy.