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Study of seasonal variation in fungi isolated from petroleum contaminated soils in Baiji , Salah aldin Province | ||
| Tikrit Journal of Pure Science | ||
| Article 1, Volume 18, Issue 2, 2013, Pages 114-122 | ||
| Authors | ||
| Marwan S.Hameed; Talib O .Al-khesraji; Khalil A.Bander | ||
| Abstract | ||
| The study recorded 36 fungal species belonging to 17 genera , most of them ( 94.4%) from Deuteromycete and the rest (5.6%) from Zygomycetes where Aspergillus , Fusarium , Penicillium , Cladosporium . and Trichoderma were the most dominant and frequent genera in soils studied. Among these genera Aspergillus. Was the most dominant genus with highest frequency (32%) and occurrence (100%) and among Aspergillus. Species, A. niger showed (100%) occurrence and (9.5%) frequency followed by A. terreus with occurrence of (87.5%) and frequency of (7.8%) compared with other Aspergillus. Species isolated . CUF for rhizospheric soils was ranged between 4.96×103_8.11×103 colony/ gm dry soil in autumn . 3.25×103 _ 4.66×103cfu/gm in winter and 3.93×103_6.12×103 cfu/gm in summer . Results also showed that polluted rhizospheric soils contained more fungal species (33 species) than both bulk (21 species) and contaminated rhizospheric (16 species) . Highest number of fungal species (34species) with highest frequency was found in autumn , compared with that in winter (23 species) and summer (27 species) .It was revealed that the frequency and number of fungal species , were different in different sites studied, where site 2 showed the highest number of fungal species (31 , 17 , 25 species in autumn ., winter .and summer respectively) while site 3 showed the lowest number of fungal species (22, 16 and 19 species in autumn , wined and summer respectively). However , rhizospheric soils of Phragmitis (Polluted or not) were found to contain more fungal species (28 species) than those of Typha (24 species) and Juncus (14 species) . | ||
| Keywords | ||
| Fungal diversity; Rhizospher; petroleum pollution | ||
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