鏈格孢(Alternaria)分類問題之淺見

Abstract

Fungi in the genus of Alternaria are very common and widely distributed. It is generally easy to tell a fungus, according to its characterized dictyosporic conidia, belonging to this genus. But, in many cases, it will be very difficult to accurately identify them to the certain species. The application of the name of the generic type species was confused, though it has been treated as conserved name by the International Code of Botanical Nomenclature as Alternaria tenuis C.G. Nees. It will be very helpful for clarifying the confusion situation in the literature if all the people who admit the Code follow the Code. About 350 taxa at species rank in the genus have been published. It is believed that quite a number of them are questionable owing to the great variation of the fungi themselves and the very varying condition in which they were described, and also because the different understanding and grasping of different authors to the concept of the species. Therefore, it is important to adopt the ”standard” culture condition which is faverable for most species in the genus to normally proliferate, and to follow integrated taxonomic criteria at species rank. It is also necessary to get a deeper understanding to the fungi from aspects of biology, physiology, biochemistry, especially the analysis of the heredity basis, DNA etc. On the basis of synthetical analysis of all informations got with computer and numerical taxonomic method we should be able to select out the most useful and stable characters as taxonomic criteria for identifying species, and will be able to bring the specific taxonomy of these mitosporic hyphomycete into the orbit of systematic mycology.