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Zhu R, Jin L, Sang Y, Hu S, Wang BT, Jin FJ. Characterization of potassium-solubilizing fungi, Mortierella spp., isolated from a poplar plantation rhizosphere soil. Arch Microbiol 2024; 206:157. [PMID: 38480543 DOI: 10.1007/s00203-024-03912-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2023] [Revised: 02/16/2024] [Accepted: 02/26/2024] [Indexed: 04/16/2024]
Abstract
Potassium-solubilizing microorganisms are capable of secreting acidic chemicals that dissolve and release potassium from soil minerals, thus facilitating potassium uptake by plants. In this study, three potassium-dissolving filamentous fungi were isolated from the rhizosphere soil of a poplar plantation in Jiangsu Province, China. Phylogenetic analyses based on ITS, 18 S, and 28 S showed that these three isolates were most similar to Mortierella. These strains also possessed spherical or ellipsoidal spores, produced sporangia at the hyphal tip, and formed petal-like colonies on PDA media resembling those of Mortierella species. These findings, along with further phenotypic observations, suggest that these isolates were Mortierella species. In addition, the potassium-dissolution experiment showed that strain 2K4 had a relatively high potassium-solubilizing capacity among these isolated fungi. By investigating the influences of different nutrient conditions (carbon source, nitrogen source, and inorganic salt) and initial pH values on the potassium-dissolving ability, the optimal potassium-solubilization conditions of the isolate were determined. When potassium feldspar powder was used as an insoluble potassium source, isolate 2K4 exhibited a significantly better polysaccharide aggregation ability on the formed mycelium-potassium feldspar complex. The composition and content of organic acids secreted by strain 2K4 were further detected, and the potassium-dissolution mechanism of the Mortierella species and its growth promotion effect were discussed, using maize as an example.
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Affiliation(s)
- Rui Zhu
- College of Ecology and Environment, Nanjing Forestry University, 159 Longpan Road, Nanjing, 210037, China
| | - Long Jin
- College of Ecology and Environment, Nanjing Forestry University, 159 Longpan Road, Nanjing, 210037, China
| | - Yue Sang
- College of Ecology and Environment, Nanjing Forestry University, 159 Longpan Road, Nanjing, 210037, China
| | - Shuang Hu
- College of Ecology and Environment, Nanjing Forestry University, 159 Longpan Road, Nanjing, 210037, China
| | - Bao-Teng Wang
- College of Ecology and Environment, Nanjing Forestry University, 159 Longpan Road, Nanjing, 210037, China
| | - Feng-Jie Jin
- College of Ecology and Environment, Nanjing Forestry University, 159 Longpan Road, Nanjing, 210037, China.
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Sigera L, Ahmed SA, Al-Hatmi AM, Welagedara P, Jayasekera P, de Hoog S. Actinomortierella wolfii: Identity and pathology. Med Mycol Case Rep 2022; 38:48-52. [DOI: 10.1016/j.mmcr.2022.10.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2022] [Revised: 10/26/2022] [Accepted: 10/28/2022] [Indexed: 11/07/2022] Open
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Yoshimura N, Tsuka T, Sunden Y, Morita T, Islam MS, Yamato O, Yoshimura T. Ophthalmic findings in a septic calf with the concurrent exhibition of meningitis and endophthalmitis. J Vet Med Sci 2021; 83:1648-1652. [PMID: 34526414 PMCID: PMC8636882 DOI: 10.1292/jvms.21-0208] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
The aim of this study was to evaluate the impacts of ophthalmic findings obtained from both macroscopic examination and ocular ultrasonography when diagnosing bovine endophthalmitis. A
newborn crossbreed (Japanese black and Holstein breeds) calf was suspected of visual impairment and central nervous system (CNS) symptoms, such as decreased activity and weak drinking
performance. This calf was found to display macroscopic signs, such as clouded lens, convergent strabismus, and horizontal nystagmus, in both eyes. On ocular ultrasonography of both eyes, a
V-shaped, thickened, hyperechoic structure was present in the anechoic vitreous humors, indicating retinal detachment. The animal died 4 days after the examination. Sepsis was evident in
this case, as Escherichia coli was isolated from multiple organs. The autopsy and histological examination revealed meningitis, encephalitis, and secondary hydrocephalus in
the CNS, and endophthalmitis and retinal detachment in both eyes. In this case, the ophthalmic findings did not provide definitive evidence for a diagnosis of endophthalmitis. However, this
study indicated that retinal detachment might be an ultrasonographic finding that is suggestive of bovine endophthalmitis.
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Affiliation(s)
- Naoaki Yoshimura
- Shimane Prefectural Federation Agricultural Mutual Aid Association, 748-1 Watarihashi, Izumo, Shimane 693-0004, Japan.,Laboratory of Animal Reproduction, Faculty of Bioscience and Bioindustry, Tokushima University, 2-24 Shinkura-cho, Tokushima 770-8501, Japan
| | - Takeshi Tsuka
- Joint Department of Veterinary Medicine, Faculty of Agriculture, Tottori University, 4-101 Koyama-Minami, Tottori, Tottori 680-8553, Japan
| | - Yuji Sunden
- Joint Department of Veterinary Medicine, Faculty of Agriculture, Tottori University, 4-101 Koyama-Minami, Tottori, Tottori 680-8553, Japan
| | - Takehito Morita
- Joint Department of Veterinary Medicine, Faculty of Agriculture, Tottori University, 4-101 Koyama-Minami, Tottori, Tottori 680-8553, Japan
| | - Md Shafiqul Islam
- Laboratory of Clinical Pathology, Joint Faculty of Veterinary Medicine, Kagoshima University, 1-21-24 Korimoto, Kagoshima, Kagoshima 890-8580, Japan
| | - Osamu Yamato
- Laboratory of Clinical Pathology, Joint Faculty of Veterinary Medicine, Kagoshima University, 1-21-24 Korimoto, Kagoshima, Kagoshima 890-8580, Japan
| | - Takaaki Yoshimura
- Department of Health Sciences and Technology, Faculty of Health Sciences, Hokkaido University, N12-W5 Kitaku, Sapporo, Hokkaido 060-0812, Japan
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Reichel MP, Wahl LC, Hill FI. Review of Diagnostic Procedures and Approaches to Infectious Causes of Reproductive Failures of Cattle in Australia and New Zealand. Front Vet Sci 2018; 5:222. [PMID: 30333984 PMCID: PMC6176146 DOI: 10.3389/fvets.2018.00222] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2018] [Accepted: 08/28/2018] [Indexed: 12/13/2022] Open
Abstract
Infectious causes of reproductive failure in cattle are important in Australia and New Zealand, where strict biosecurity protocols are in place to prevent the introduction and spread of new diseases. Neospora caninum ranks highly as an important cause of reproductive wastage along with fungal and bacterial infections. Brucella, a leading cause of abortion elsewhere in the world, is foreign, following successful programs to control and eradicate the disease. Leptospirosis in cattle is largely controlled by vaccination, while Campylobacter and Tritrichomonas infections occur at low rates. In both countries, Bovine Viral Diarrhea virus (BVDV) infection rates as the second most economically important disease of cattle and one that also has an effect on reproduction. Effective disease control strategies require rapid diagnoses at diagnostic laboratories. To facilitate this process, this review will discuss the infectious causes of reproductive losses present in both countries, their clinical presentation and an effective pathway to a diagnosis.
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Affiliation(s)
- Michael P Reichel
- Department of Infectious Diseases and Public Health, Jockey Club College of Veterinary Medicine and Life Sciences, City University of Hong Kong, Hong Kong, Hong Kong
| | - Lloyd C Wahl
- Department of Infectious Diseases and Public Health, Jockey Club College of Veterinary Medicine and Life Sciences, City University of Hong Kong, Hong Kong, Hong Kong
| | - Fraser I Hill
- Department of Infectious Diseases and Public Health, Jockey Club College of Veterinary Medicine and Life Sciences, City University of Hong Kong, Hong Kong, Hong Kong
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Curtis B, Hollinger C, Lim A, Kiupel M. Embolic mycotic encephalitis in a cow following Mortierella wolfii infection of a surgery site. J Vet Diagn Invest 2017; 29:725-728. [PMID: 28548570 DOI: 10.1177/1040638717710684] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
A 5-y-old Holstein dairy cow had surgery for a suspected displaced abomasum 10 d postpartum, developed acute neurologic signs at day 19, and was found dead 21 d postpartum. At autopsy, there was a peri-incisional intramuscular abscess that communicated with the peritoneal cavity, as well as hemorrhage and malacia involving the brain, and multiple nodules in the liver, kidneys, and lungs. Fungal hyphae were seen histologically at the surgery site, on the surface of the liver, and in lesions of severe necrotizing vasculitis in the lungs, kidneys, brain, and liver. The uterus was free of fungal organisms. Pan-fungal PCR and DNA sequencing identified the fungus as Mortierella wolfii. Previously reported deaths from M. wolfii have been related to abortion, but in this case, there was no histologic evidence of fungal organisms in the uterus, calving was routine, and there was a several week delay between calving and development of neurologic signs. The findings suggested a unique case of surgical site infection with subsequent embolic mycosis.
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Affiliation(s)
- Benjamin Curtis
- Department of Pathobiology and Diagnostic Investigation, Diagnostic Center for Population and Animal Health, College of Veterinary Medicine, Michigan State University, Lansing, MI
| | - Charlotte Hollinger
- Department of Pathobiology and Diagnostic Investigation, Diagnostic Center for Population and Animal Health, College of Veterinary Medicine, Michigan State University, Lansing, MI
| | - Ailam Lim
- Department of Pathobiology and Diagnostic Investigation, Diagnostic Center for Population and Animal Health, College of Veterinary Medicine, Michigan State University, Lansing, MI
| | - Matti Kiupel
- Department of Pathobiology and Diagnostic Investigation, Diagnostic Center for Population and Animal Health, College of Veterinary Medicine, Michigan State University, Lansing, MI
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Wada S, Ode H, Hobo S, Niwa H, Katayama Y, Takatori K. Mortierella wolfii keratomycosis in a horse. Vet Ophthalmol 2011; 14:267-70. [PMID: 21733069 DOI: 10.1111/j.1463-5224.2011.00891.x] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
PURPOSE To describe a case of superficial keratomycosis caused by Mortierella wolfii (M. wolfii) in a horse. METHODS A thoroughbred filly was presented with painful right eye of 2 days' duration. A superficial corneal ulcer was observed ventrally together with multifocal punctuate opacities axially. Samples were collected by swabbing and scraping the ulcerated lesion and submitted for microbiologic and cytologic examination. RESULTS Microscopic evaluation of debrided corneal tissue revealed the presence of nonseptate fungal hyphae, and culture of a corneal swab yielded fungal growth. Medical treatment with topical antifungal, antibiotic and autogenous serum and systemic anti-inflammatory resolved the problem within 2 weeks. CONCLUSIONS Cytologic evaluation of a corneal scraping was useful to make a clinical diagnosis of keratomycosis. Based on the mycological characteristics, the fungus isolated from the corneal lesion was identified as M. wolfii. To the authors' knowledge, this is the first case report of equine keratomycosis associated with this fungus, although the organism is known to infect various organs of cattle.
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Affiliation(s)
- Shinya Wada
- Racehorse Hospital, Ritto Training Center, The Japan Racing Association, 1028, Misono, Ritto, Shiga 520-3085, Japan.
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