Freshwater fungi in the Amazon as a potential source of antimicrobials

Canto, Eveleise Samira Martins; Segundo, Walter Oliva Pinto Filho; Cortez, Ana Cláudia Alves; Barbosa, Flávia Rodrigues; Monteiro, Josiane Santana; de Souza, João Vicente Braga

doi:10.1016/b978-0-323-91232-7.00009-x

Cited by 2 publications

(4 citation statements)

References 97 publications

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“…Te lower fungal colony count in dolphins, as compared to their environment, points towards a robust immune system and a unique microbiota composition, potentially skewed towards bacterial dominance previous described [21,22]. Te fungi isolated from the water included Penicillium, Rhodotorula, and others belong to genera previously identifed in water samples from the Rio Negro [23][24][25]. Predominantly from the phylum Ascomycota, these fungi are mostly transient in the environment, seeking suitable substrates for their growth and development [25].…”

Section: Discussionmentioning

confidence: 68%

Cultivable Fungi from Amazon River Dolphins Engaged in Wildlife Ecotourism in the Anavilhanas National Park, Brazil

Alves,

Fonseca,

Barroso

et al. 2024

Veterinary Medicine International

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Amazon River dolphins are an important flagship species in the Anavilhanas National Park, Brazil, where they interact with visitors. This study aimed to quantify and identify fungi isolated from dolphin skin and oral samples and their surrounding environment in this unique ecosystem. Samples were collected from three dolphins and water samples from Flutuante dos Botos and the Novo Airão city harbor. Fungi were isolated using culture media and identified through micromorphology assays and ITS region sequencing. Oral swab samples resulted in culture of Trichosporon montevideense and Exophiala dermatitidis. Skin samples from one dolphin revealed Toxicocladosporium irritans and Diaporthe lithocarpus. Water samples exhibited higher fungal counts and diversity, with Rhodotorula mucilaginosa, Exophiala dermatitidis, Penicillium citrinum, Fomitopsis meliae, and Nectria pseudotrichia identified at the collection site and Candida spencermartinsiae and Penicillium chermesinum at the city harbor. This study provides important insights into the fungal diversity associated with Amazon River dolphins and their environment, enhancing our understanding of the public health and ecological dynamics in the Anavilhanas National Park.

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Section: Discussionmentioning

confidence: 68%

Cultivable Fungi from Amazon River Dolphins Engaged in Wildlife Ecotourism in the Anavilhanas National Park, Brazil

Alves,

Fonseca,

Barroso

et al. 2024

Veterinary Medicine International

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“…Microbial natural products from freshwater aquatic fungi present exciting opportunities to discover natural alternatives for commercial antimicrobial products ( El-Elimat et al 2021 ; Canto et al 2022 ). Many studies identified antimicrobial compounds in several aquatic fungi ( Poch et al 1992 ; Harrigan et al 1995 ; Oh et al 1999 , 2001 , 2003 ; Mudur et al 2006 ; Gloer 2007 ).…”

Section: Discussionmentioning

confidence: 99%

“…Lentic ecosystems are static aquatic ecosystems such as lakes, ponds, and swamps ( Kuehn 2016 ). Dams and reservoirs are examples of artificial or hybrid habitats ( Jones and Pang 2011 ; Canto et al 2022 ). The water flow is a determinant in the oxygenation of the lotic and lentic ecosystems and can influence biological processes and biodiversity.…”

Section: Introductionmentioning

confidence: 99%

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Comparative genome analysis of the freshwater fungus Filosporella fistucella indicates potential for plant-litter degradation at cold temperatures

Vasconcelos Rissi,

Ijaz,

Baschien

2023

G3: Genes, Genomes, Genetics

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Freshwater fungi play an important role in the decomposition of organic matter of leaf-litter in rivers and streams. They also possess the necessary mechanisms to endure lower temperatures caused by habitat and weather variations. This includes the production of cold-active enzymes and antifreeze proteins. To better understand the physiological activities of freshwater fungi in their natural environment, different methods are being applied, and genome sequencing is one in the spotlight. In our study, we sequenced the first genome of the freshwater fungus Filosporella fistucella (45.7 Mbp) and compared the genome with the evolutionary close-related species Tricladium varicosporioides (48.2 Mpb). The genomes were annotated using the carbohydrate-active enzymes database where we then filtered for leaf-litter degradation-related enzymes (cellulase, hemicellulase, laccase, pectinase, cutinase, amylase, xylanase, and xyloglucanase). Those enzymes were analyzed for antifreeze properties using a machine-learning approach. We discovered that Filosporella fistucella has more enzymes to participate in the breakdown of sugar, leaf, and wood than Tricladium varicosporioides (855 and 719, respectively). F. fistucella shows a larger set of enzymes capable to resist cold temperatures than T. varicosporioides (75 and 66 respectively). Our findings indicate that in comparison with T. varicosporioides, F. fistucella has a greater capacity for aquatic growth, adaptability to freshwater environments, and resistance to low temperatures.

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Freshwater fungi in the Amazon as a potential source of antimicrobials

Cited by 2 publications

References 97 publications

Cultivable Fungi from Amazon River Dolphins Engaged in Wildlife Ecotourism in the Anavilhanas National Park, Brazil

Cultivable Fungi from Amazon River Dolphins Engaged in Wildlife Ecotourism in the Anavilhanas National Park, Brazil

Comparative genome analysis of the freshwater fungus Filosporella fistucella indicates potential for plant-litter degradation at cold temperatures

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