Distribution and estimation of anaerobic zoosporic fungi along the digestive tracts of sheep
Open accessAbstract
The status of anaerobic zoosporic (Chytridiomycota) fungi along the entire digestive tract of sheep was assessed both analytically and microscopically. Digest samples were taken from different segments of the digestive tracts of three newly killed sheep that previously had been used in experimental dietary studies. These digest samples were tested for the presence of rumen fungi by assessing the recovery of live fungi from the samples, direct observation of digested plant remains under the scanning electron microscope (SEM), and using a chitin assay as an estimation of fungal biomass. Live anaerobic fungi were recovered from the abomasum, small and large intestine, caecum and faeces of sheep, but not from the digest samples of rumen and omasum. However, SEM examination of the samples confirmed the presence of fungal structures from all of these organs. In the large intestine and caecum samples the observed sporangial structures were rounded and showed conspicuous surface pitting. Results of the chitin assay indicated that the anaerobic fungi might account for up to 20% of the total microbial biomass in the rumen of sheep. The results of this study support the view that anaerobic fungi may be present as a resistant stage in the lower reaches of the digestive tract.
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Anaerobic fungi represent 10-20% of the rumen microbiome.
“Chitin measurements (Rezaeian et al., 2004) and rRNA transcript abundance (Elekwachi et al., 2017) indicate that anaerobic fungi represent 10–20% of the rumen microbiome.”
From Addressing global ruminant agricultural challenges through understanding the rumen microbiome: past, present, and future (2018) · cites this paper as Rezaeian et al., 2004
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- Authors
- Rezaeian, M., Beakes, G. W., & Parker, D. S.
- Affiliations
- University of Tehran (IR)
- Newcastle University (GB)
- Corresponding author
- Rezaeian, Mohammad
- ORCID
- Parker, David S.
- Venue
- Mycological Research
- Publisher
- Elsevier BV
- Published
- 2004-10
- Volume
- 108
- Issue
- 10
- Pages
- 1227-1233
- ISSN
- 0953-7562 (ISSN-L)
- OpenAlex
- W2046551603
- Cited by
- 82
- References
- 32
- Citations by year
- 2026: 1 · 2025: 8 · 2024: 4 · 2023: 4 · 2022: 7 · 2021: 5 · 2020: 5 · 2019: 3 · 2018: 6 · 2017: 6 · 2016: 3 · 2015: 6 · 2014: 2 · 2013: 3 · 2012: 6
- FWCI
- 2.17
- Type
- journal article
- Language
- en
- Open access
- green
- doi.org
- Locations
- Mycological Research (publishedVersion)
- PubMed (publishedVersion)
- Newcastle University ePrints (Newcastle Univesity)
- Topics
- Life Sciences › Agricultural and Biological Sciences › Agronomy and Crop Science › Ruminant Nutrition and Digestive Physiology
- Health Sciences › Veterinary › Small Animals › Infectious Diseases and Mycology
- Physical Sciences › Engineering › Building and Construction › Anaerobic Digestion and Biogas Production
- Keywords
- Chytridiomycota, rumen fungi, fungal distribution, fungal biomass estimation, sporangia, cecum, abomasum, intestinal fungi, ruminant gut microbiota
- MeSH terms
- Animals, Chitin, Gastrointestinal Contents, Male, Chytridiomycota, Microscopy, Electron, Scanning, Sheep, Biomass, Gastrointestinal Tract
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