Joanna F. Dames

ORCID: 0000-0003-2957-4764
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About
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Research Areas
  • Mycorrhizal Fungi and Plant Interactions
  • Plant Pathogens and Fungal Diseases
  • Forest Ecology and Biodiversity Studies
  • Fungal Biology and Applications
  • Entomopathogenic Microorganisms in Pest Control
  • Soil Carbon and Nitrogen Dynamics
  • Plant-Microbe Interactions and Immunity
  • Ecology and Vegetation Dynamics Studies
  • Insect Resistance and Genetics
  • Insect Pest Control Strategies
  • Allergic Rhinitis and Sensitization
  • Banana Cultivation and Research
  • Plant nutrient uptake and metabolism
  • Legume Nitrogen Fixing Symbiosis
  • Lichen and fungal ecology
  • Plant Stress Responses and Tolerance
  • Agronomic Practices and Intercropping Systems
  • Enzyme Production and Characterization
  • Forest ecology and management
  • Plant Parasitism and Resistance
  • Insect behavior and control techniques
  • Phytochemistry and Bioactivity Studies
  • Horticultural and Viticultural Research
  • Indoor Air Quality and Microbial Exposure
  • Enzyme-mediated dye degradation

Rhodes University
2015-2024

Adekunle Ajasin University
2021

University of Nigeria
2021

University of the Witwatersrand
1993-2002

University of Liège
1983-1985

Physiol (Belgium)
1983-1985

Glucoamylase from fungi has proved to be a very useful enzyme for industrial processes by improving yields of food and starch products. This study determined specific catalytic properties purified glucoamylase obtained fungus, Leohumicola incrustata (MF374380). The was produced using submerged fermentation method crude centrifuged purified. Avicel, beechwood (BW) xylan, carboxymethylcellulose (CMC), colloidal chitin, soluble as well glycogen, amylose, amylopectin, maize (raw), blocked...

10.4314/dujopas.v10i4c.25 article EN cc-by-nc Dutse Journal of Pure and Applied Sciences 2025-01-25

This study investigated the effect of arbuscular mycorrhizal (AM) fungal consortia on growth, photosynthetic pigments, solutes concentration (e.g., sugars and proline), antioxidant responses at different levels Na2SO4 stress (0–0.5%, w:w) in potted culture Jatropha. Results showed that increasing salt caused a significant reduction survival (%), growth parameters, leaf relative water content (LRWC) chlorophyll with an increase electrolyte leakage (%) lipid peroxidation membranes AM...

10.1080/11263504.2013.845268 article EN Plant Biosystems - An International Journal Dealing with all Aspects of Plant Biology 2013-10-28

The pathogenicity of 15 isolates Beauveria bassiana (Balsamo) Vuillemin, five Metarhizium anisopliae (Metschnikoff) Sorokin and one isolate M. flavoviride (Gams Rozsypal) were tested under laboratory conditions against the subterranean life stages citrus pests, Ceratitis rosa Karsch, C. capitata Wiedemann (Diptera: Tephritidae) Thaumatotibia leucotreta Meyrick. (Lepidoptera: Tortricidae). When these pests treated with a concentration 1×107 conidia mL−1, fungal had significantly greater...

10.1080/09583157.2011.608907 article EN Biocontrol Science and Technology 2011-09-16

This study explores the biotechnological potential for plant production of twelve psychrotolerant yeasts strains from Northwest-Patagonia. These were isolated different substrates associated with Nothofagus sp. in native forests and Vaccinium a commercial plantation. Yeasts characterization was performed using vitro assays to evaluate auxin-like compounds siderophores, ability solubilize inorganic phosphate reduce common pathogen growth. Strain YF8.3 identified as Aureobasidium pullullans...

10.1002/jobm.201500728 article EN Journal of Basic Microbiology 2016-04-23

Abstract Thaumatotibia leucotreta (Meyrick) (1912) (Lepidoptera: Tortricidae) is a key economic pest of citrus in South Africa. Although variety control options are available, none currently registered target the soil-dwelling life stages pest. Three fungal isolates, two Metarhizium anisopliae sensu lato Metschnikoff (Sorokin) isolates (G 11 3 L6 and FCM Ar 23 B3) one Beauveria bassiana Balsamo (Vuillemin) isolate 17 have been identified as showing greatest potential against T. stages. Since...

10.1080/09583157.2013.819489 article EN Biocontrol Science and Technology 2013-07-01

The potato ( Solanum tuberosum L.) is an important tuber crop with high dietary value that could potentially help to alleviate malnutrition and hunger in Africa. However, production expensive, fertilizer pesticide demands lead environmental pollution, tillage practices negatively affect soil structure. Microorganisms of different types have increasingly been found be useful as biofertilizers, arbuscular mycorrhizal (AM) fungi are symbiont. AM shown increase tolerance plants drought, salinity...

10.3389/fsufs.2020.593053 article EN cc-by Frontiers in Sustainable Food Systems 2020-12-21

10.1023/a:1004346025926 article EN Plant and Soil 1998-01-01

The quest for novel sources of antibacterial compounds have necessitated the inclusion ericoid mycorrhizal fungi (ERM) commonly found within root ericaceous plants. Agar-well diffusion method was used to detect activity and followed by microbroth [minimum inhibitory concentration (MIC) minimum bactericidal (MBC)]. results phytochemical screening indicated that only alkaloids, flavonoids, phenols, saponins, cardiac glycosides terpenoids were present, while steroids tannins absent. MIC...

10.1186/s12866-019-1555-y article EN cc-by BMC Microbiology 2019-08-05

This study aimed to purify and characterize amyloglucosidase (AMG) from Leohumicola incrustata. AMG was purified homogeneity cell-free culture filtrate of an ERM fungus grown in a modified Melin–Norkrans liquid medium. The molecular mass the estimated be 101 kDa by combining results Sephadex G-100 gel filtration, sodium dodecyl sulphate–polyacrylamide electrophoresis, zymography. Km kcat values were 0.38 mg mL−1 70 s−1, respectively, using soluble starch as substrate. enzyme stable at 45 °C...

10.1186/s13568-018-0685-1 article EN cc-by AMB Express 2018-09-29

False codling moth, Thaumatotibia leucotreta Meyrick (1912) (Lepidoptera: Tortricidae), can cause both pre- and post-harvest damage to citrus fruit. Not only this result in reduced crop yield, but more importantly because of the moth's endemism sub-Saharan Africa, it is classified as a phytosanitary pest by many export markets. An entire consignment may be rejected presence single moth (Moore 2012). Since bulk fruit production South Africa exported, control T. critical (Citrus Growers...

10.4001/003.023.0107 article EN African Entomology 2015-03-01

The optimization of microbial growth for biotechnological purposes traditionally requires an approach that uses only one variable at a time, which has many drawbacks. This research used completely randomized to optimize carbon and nitrogen nutrient requirements factors (pH temperature) Pleurotus tuber-regium in order optimally produce biomass extracellular polysaccharide (EPS) shake-flask cultures. An artificial neural network (ANN) module was simulate the fungus-growing process hence...

10.1615/intjmedmushrooms.2019030357 article EN International journal of medicinal mushrooms 2019-01-01

Aethina tumida Murray (Coleoptera: Nitidulidae) is an invasive parasite species in populations of honey bees, Apis mellifera L. Aiming toward substitution chemical control, we here identified a naturally occurring fungal pathogen adult A. from its endemic range South Africa [Metarhizium anisopliae (Metschnikoff) Sorokin variety strain FI-203]. The susceptibility beetles (n = 400) to this fungus and three other generalist entomopathogenic isolates anisopliae, Beauveria bassiana (Balsamo)...

10.1603/0022-0493(2006)099[0001:soaatc]2.0.co;2 article EN Journal of Economic Entomology 2006-02-01
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