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通过对樟子松叶、枝、芽、果等部位进行组织切片和真菌分离培养 ,鉴定出真菌 2 4种 ,其中子囊菌 3种、担子菌 1种、半知菌 2 0种。这些真菌种群在樟子松树体上可分为芽栖真菌、叶栖真菌、枝栖和果栖真菌 4大类 ,其种类组成和数量与樟子松树龄、叶龄、枝龄、树冠层次等有密切关系。芽栖真菌种类和数量随树龄的增加而增多 ,叶栖真菌 (特别是兼性寄生真菌 )的种类和数量随叶龄的增加而增多 ,枝栖真菌种类和数量随枝龄的增加而增多。樟子松树栖真菌种群组成也随环境条件而发生变化 ,在发病的樟子松林分内樟子松枯梢病菌数量激增占主导地位 ,环境条件的恶化是促成变动的主要原因。在健康的樟子松林分内也广泛地分离到樟子松枯梢病菌 ,表明该病害是潜伏性的侵染病害。
Twenty four species of fungi were identified, including 3 species of ascomycetes, 1 species of basidiomycetes and 20 species of semi-aseptic fungi, from tissue sections and fungi isolated from leaves, branches, buds and fruits of Pinus sylvestris var. Mongolica. These fungi populations can be divided into four categories: budding fungi, leaf-dwelling fungi, twig and fruit-growing fungi on Pinus sylvestris var. Mongolica, whose species composition and quantity are closely related to the age, leaf age, There is a close relationship. The species and quantity of budding fungi increased with the increase of tree age. The species and quantity of leaf - borne fungi (especially facultative parasitic fungi) increased with the increase of leaf age. The species and quantity of branchial fungi increased with the increase of branch age. The population composition of arborescent fungi in Pinus sylvestris var. Mongolica also changed with the environmental conditions. In the Pinus sylvestris var. Mongolica forest, the number of Pinus sylvestris var. Mongolica dominated. The deterioration of environmental conditions was the main reason for the change. Pinus sylvestris var. Mongolica was also widely isolated in healthy Pinus sylvestris var. Mongolica forest, indicating that the disease is a latent infection disease.