Identification of Bracket Fungi and Characteristics of Their Host Trees in District І of The Shastkolateh Forest of Gorgan

Bracket fungi are the most important macroscopic fungi in the forest as trees are parasitic and saprophytic. This aim of this study is investigation on relate of between some of the characteristics of host and frequency of bracket fungi in district one of Shastkolate forest of Gorgan. Inventory of trees infected by bracket fungi was done using two strip transects and Factors, including the type, quality and diameter of host trees, name of fungi, frequency of fungi and direction fungi on the trunk of the trees were recorded. The most abundant species in the study area are two family Polyporaceae and Ganodermataceae. Host preference of bracket fungi showed these fungi selected fagus and carpinus trees with 50/98 % and 31/37 % for establishment. Also investigation the quality of hosts showed bracket fungi 69/76 percent on fallen trees, 25/39 % on dead trees standing and 4/85 percent on live trees were establishment. These fungi more establishment in southern directs of the trunk of stand trees and their frequency increases with increasing diameter trees, so that the class above 85 cm diameter of standing trees and class above 40 cm diameter the fallen trees have a significant difference with their below diameter class.