Introducing Two Fungi Species of Trametes spp. and Their Relationship with some of the tree Characteristics and Sites factors in Lorestan Province, Iran

This study was carried out to introduce wood-inhabiting fungi and their relationship with hosts in forests of Middle Zagros, Lorestan province, Iran. For this study, at first, the location of the infected trees were recorded with GPS and then, following factors were recorded comprising physiographic factors (altitude, slope and aspect), the frequency of fungi, fungi establishment aspect on trunk, breast diameter height of tree, distribution on standing or fallen trees, seed or sprouted individual, crown dieback of host trees along Sarabe-Navehkesh river. Then, identifying wood-inhabiting fungi was performed using studies and the use of valid keys. The results indicated the presence of two species of Trametes trogii and Trametes versicolor on willow trees. Also, investigations on T. trogii fungus on willow showed that the highest frequency of fungi was observed at a diameter of 20-40 cm, standing trees and die back at 1/3 of crown. In addition, the highest percentage of T. trogii presence was on <0.5m height class. Investigating the decay relationship with some of site factors, ordinal logistic regression was used and was determined that crown decay variable had significant effect on decay class of trees (p≤0.01). The establishment of wood-inhabiting fungi on decayed trees, dead trees and remained stump in forest can contribute to soil improvement, but in areas where young and healthy trees are infected need to control. Therefore, in this area to protect river-side trees, good management of forest protection is necessary to protect and preserve in order to inhibiting T. trogii fungi distribution.