| Summary: | 碩士 === 國立師範大學 === 生物學研究所 === 86 === Saprolegniaceae is a common group of aquatic Chromista. Its life cycle is composed of asexual reproduction generating biflagellate zoospores and sexual reproduction producing oogonium and antheridium. In general, it inhabits the flesh water and wet soil. Most of species live as saprophytic and only few species live as parasitic. There are 20 genera and about 140 species in the Family Saprolegniaceae. Water molds are isolated from the soil and water samples collected in Taiwan by using hemp-seed and snake skin as bait, are purely cultivated through glass ring method and 1/4 Emerson's YpSs Agar medium ,and then are identified according to keys: Coker(1923)、Johnson(1956)、Sparrow(1960)、Scott(1960)、Seymour(1970)、Dick(1973) and relative references (Forbes, 1934; Cutter, 1941; Howard et al., 1970; Volz et al., 1974; Chiou & Chang, 1975, 1976; Chien, 1980; Chowdhery & Rai, 1980; Paul, 1983). Totally, seven genera and nineteen species are successfully examined and identified namely：eight species of Achlya：A. debaryana、A. dubia、A. flagellata、A.klebsiana、A.orion、A.prolifera、A. recurva、A. subcentrica；two species of Aphanomyces：A. helicoides、A. stellatus；one species of Brevilegntia：B. subcentrica；one species of Dictyuchus：D. sterile；one species of Leptolegnia：L. undulatae；five species of Saprolegnia：S. diclina、S. ferax、S. litoralis、S. subterranea、S. terrestris；one species of Thraustotheca：T. clavata. Among them, Achlya orion、Saprolegnia litoralis and S. subterranea are described as new records to Taiwan, and Achlya subcentrica and Leptolegnia undulatae are new species.
|
|---|
