In situ Symbiotic Seed Germination, Isolation and Identification of Effective Mycorrhizal Fungus in Paphiopedilum hirsutissimum (Orchidaceae) Study on the Morphological Changes of the Ectomycorrhizae Formed by Tuber aestivum on Cyclobalanopsis glauca Seedlings RESISTANCE OF HOST TREES AND EXISTANCE STRATEGY EVOLUTION OF BARK BEETLES Ex situ symbiotic seed germination, isolation and identification of effective symbiotic fungus in Cymbidium mannii (Orchidaceae) Effects of Symbiotic Fungi on the Physiological Characteristics of Dendrobium catenatum Lindley(Orchidaceae)