Occurrence of zoosporic and terrestrial fungi in accumulated rainfall water in the Riyadh region ( Saudi Arabia )
نویسنده
چکیده
Twenty-one species belonging to ten genera of zoosporic fungi were recovered from 23 surface water samples collected from ponds of accumulated rainfall in the Riyadh region (Saudi Arabia) using sesame seeds as baits at 20 ± 2 C. The most common genera were Allomyces (3 species), Aqualinderella (I species), Dictyuchus (2 species) and Pythium (3 species). The remaining six genera were less frequent. Four species (Allomyces macrogynus, Aqualinderella fermentans, Pythium rostratum and Pythium ultimum) were recorded for the first time in Saudi Arabia. Fifty-one species and one variety of terrestrial fungi belonging to 21 genera were also identified on glucose and cellulose Czapek's Dox agar incubated at 28 C. The most common species were Aspergillus flavus, A. fumigatus. A. niger, A. flavus var. columnaris, Acremonium stictum, Cladosporium herbarum, Fusarium oxysporum and Penicillium corylophilum. Some fungi such as Chaetomium globosum and Memnoniella echinata were isolated only on cellulose agar medium.
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