title: Carbon utilization profile of the filamentous fungal species Fusarium fujikuroi, Penicillium decumbens, and Sarocladium strictum isolated from marine coastal environments.
abstract: Facultative marine filamentous fungi have recently emerged as a functional component in coastal marine systems. However, little is known about their ecological role and functions in biogeochemical cycles. Penicillium decumbens, S. strictum, and F. fujikuroi were isolated from the coastal upwelling zone off south-central Chile. Their carbon profiles were characterized using Biolog FF MicroPlates. These species used a wide range of carbon sources, mainly carbohydrates, but also amino acids, suggesting the use of metabolic routes that include glycolysis/gluconeogenesis. Substrate richness revealed a great capacity for the utilization of nutritional sources, reflected by the following Shannon Indices of utilization of specific substrates: 4.02 for S. strictum, 4.01 for P. decumbes, and 3.91 for F. fujikuroi, which reveals a high physiological capacity for oxidizing different substrates. Significant differences were found between 18 substrates utilized by all three species. Results suggest that filamentous fungi should be considered an integral part of the marine microbial community and included in biogeochemical cycling models of upwelling ecosystems.
authors.forename: Marcelo E
authors.initials: ME
authors.lastname: Fuentes
authors.affiliation: a Department of Oceanography, University of Concepción, Concepción, Chile.|b Interdisciplinary Center for Aquaculture Research (INCAR), University of Concepción, PO Box 160-C, O'Higgins 1695, Concepción, Chile.
authors.forename: Renato A
authors.initials: RA
authors.lastname: Quiñones
mesh_terms: D002244:Carbon / Q000378:metabolism*; D002677:Chile; D004783:Environmental Microbiology; D006999:Hypocreales / Q000302:isolation & purification / Q000378:metabolism*; D053858:Metabolic Networks and Pathways; D010084:Oxidation-Reduction; D010407:Penicillium / Q000302:isolation & purification / Q000378:metabolism*
chemical_list: D002244:Carbon
keywords: Biolog Filamentous Fungi (FF) microplate; Humboldt Current System; marine fungi; oxidation of substrates; substrate utilization; upwelling