1. Interactions between hyphosphere-associated bacteria and the fungus Cladosporium herbarum on aquatic leaf litter.
- Author
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Baschien C, Rode G, Böckelmann U, Götz P, and Szewzyk U
- Subjects
- Antibiosis, Biodegradation, Environmental, Carbon analysis, Cellulases metabolism, Chryseobacterium growth & development, Chryseobacterium isolation & purification, Chryseobacterium metabolism, Cladosporium enzymology, Cladosporium isolation & purification, Coculture Techniques, Hyphae, Nitrogen analysis, Ralstonia pickettii isolation & purification, Rivers microbiology, beta-Glucosidase metabolism, Cladosporium growth & development, Plant Leaves microbiology, Ralstonia pickettii growth & development, Water Microbiology
- Abstract
We investigated microbial interactions of aquatic bacteria associated with hyphae (the hyphosphere) of freshwater fungi on leaf litter. Bacteria were isolated directly from the hyphae of fungi from sedimented leaves of a small stream in the National Park "Lower Oder," Germany. To investigate interactions, bacteria and fungi were pairwise co-cultivated on leaf-extract medium and in microcosms loaded with leaves. The performance of fungi and bacteria was monitored by measuring growth, enzyme production, and respiration of mono- and co-cultures. Growth inhibition of the fungus Cladosporium herbarum by Ralstonia pickettii was detected on leaf extract agar plates. In microcosms, the presence of Chryseobacterium sp. lowered the exocellulase, endocellulase, and cellobiase activity of the fungus. Additionally, the conversion of leaf material into microbial biomass was retarded in co-cultures. The respiration of the fungus was uninfluenced by the presence of the bacterium.
- Published
- 2009
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