Health Survey And Wood-decay Fungi Investigation Of Old And Valuable Trees In Fuzhou

The health survey of first-class and second-class protected Old and Valuable Trees in Fuzhou were carried out in this study,meanwhile,wood-decay fungi on these trees were also investigated.Up to now,560 trees have been surveyed.According to the assessment of decay-associated symptoms,206 trees belong to class la,293 trees belong to class 1b,56 trees belong to class 2,and 5 trees belong to class 3.Generally speaking,most of the surveyed trees were found with damages but under satisfactory conditions.On the other hand,74 fungal samples were obtained,that is to say around 13%of the surveyed Old and Valuable trees were found with wood-decay fungi.Among the obtained 74 fungal samples,43 samples have been identified to species level.Most of these identified wood-decay fungi belong to Ganodermataceae,Hymenochaetaceae and Polyporaceae,including common wood-decay fungal genera Fomitiporia,Ganoderma,Inonotus,Rigidoporus and Trametes.Some of these wood-decay fungal species(eg Inonotus rickii,Irpex lacteus)have been reported as pathogens and can cause severe damages to trees.However,the effect of these wood-decay fungi to the Old and Valuable Trees of Fuzhou City is not clear yet and needs further studies.Furthermore,based on previous studies of Trametes,phylogenetic analyses were also carried out for some Trametes species of Fujian province to explore their phylogenetic relationships.At last,an identification key based on the the morphological characteristics(e.g.,fruiting bodies)for the total 21 known Fujian Trametes species was made to facilitate the identification of Fujian Trametes species in the future.