the aim of the present study was to isolate and identify parasites and saprophytes from fungal affected eggs of rainboe trout.the samples (n= 900) were obtained from six fish farm and transferred to mycology laboratory in stril tubes . the samples were inoculated in cculture media , (sda, cma, gpagar and hemp seeds cultures) at room temperature (18-24°c) . twelve species of fungi isolated from ...

The order Saprolegniales includes pathogenic species of aquatic and terrestrial plants and aquatic animals including fish. These straminipilous fungi play an important role as a decomposing component which participates in the destruction processes of organic substrates and self-cleaning biological processes in freshwater ecosystems. In this study, samples of brown decayed twigs, leaves, woods a...

A study was conducted to evaluate the pathogenicity and pathology of Achlya proliferoides BSN-M005 and Saprolegnia diclina BSN-M003, isolated from saprolegniosis outbreaks against immature stages of Nile tilapia, Oreochromis niloticus. The cumulative mortality rates of the tested fish groups that exposed to high zoospore concentrations of A. proliferoides BSN-M005 and S. diclina BSN-M003 were 6...

The author investigated aquatic fungi developing on the seeds of some plants in various types of water bodies of Podlasie Province. The bait method was used to isolate the fungi. Seventy-four aquatic fungal species were found on seeds of three species of plants: Cannabis sativa hemp-seeds 59, Fagopyrum esculentum buckwheat-seeds 55 and on Vicia sativa vetch-seeds 44 in water of four various bod...

Some factors controlling the differentiation of sporangia and gemmae in an isolate of Achlya sp. were investigated by replacement culture technique. Factors in the replacement medium which affect differentiation were as follows: A) Calcium is required for the differentiation of both sporangia and gemmae. B) Calcium cannot be replaced by magnesium, potassium or sodium. C) Gemmae are induced when...

Heat shock led to marked changes in the apparent levels of phosphorylation of nuclear proteins in the fungus Achlya ambisexualis. We characterized these heat shock-induced changes in nuclear proteins on two types of two-dimensional polyacrylamide gel systems. We report here that one of two Achlya H3 histones (H3.1) and also the oomycete histone alpha appear to be highly phosphorylated with heat...

Sexual morphogenesis in Achlya, a filamentous water mold, is initiated by two hormones. Hormone A, or antheridiol, is a C-29 steroid. Four stereoisomers of antheridiol have been synthesized. The natural one (antheridiol 22S 23R) and its 7-deoxy 7-dihydro form, when added to an aerated culture of hermaphroditic Achlya heterosexualis, stimulated this mold to secrete twice as much hormone B as the...