A5051946790- Plant Diversity and Evolution
- Phytochemistry and Bioactive Compounds
- Plant Taxonomy and Phylogenetics
- Plant and animal studies
- Natural product bioactivities and synthesis
- Sesquiterpenes and Asteraceae Studies
- Yeasts and Rust Fungi Studies
- Plant Toxicity and Pharmacological Properties
- Plant Parasitism and Resistance
- Phytochemical compounds biological activities
- Plant Pathogens and Fungal Diseases
- Plant and Fungal Species Descriptions
- Fern and Epiphyte Biology
- Botany, Ecology, and Taxonomy Studies
- Plant Reproductive Biology
- Seed Germination and Physiology
- Insect and Pesticide Research
- Actinomycetales infections and treatment
- Insect and Arachnid Ecology and Behavior
- Plant-Derived Bioactive Compounds
- Biocrusts and Microbial Ecology
- Botanical Studies and Applications
- Renal and Vascular Pathologies
- Coastal wetland ecosystem dynamics
- Cerebrovascular and Carotid Artery Diseases
University of the Free State
2009-2024
University of Cambridge
2019-2021
MRC Biostatistics Unit
2019
Large clades of angiosperms are often characterized by diverse interactions with pollinators, but how these pollination systems structured phylogenetically and biogeographically is still uncertain for most families. Apocynaceae a clade >5300 species worldwide distribution. A database representing >10 % in the family was used to explore diversity pollinators evolutionary shifts across major regions. The compiled from published unpublished reports. Plants were categorized into broad then...
Abstract Cryptolepis is the second‐largest genus in Periplocoideae with 30 species. It most widely distributed subfamily and occupies a wide range of habitats, from moist forests to stony semi‐deserts. Analyses DNA‐data revealed that paraphyletic and, for monophyly prevail, Parquetina should be included . Most species fall into two major clades: one confined NE Africa neighbouring areas; other absent but West South Africa. more arid areas are shrubby, often reduced leaves much reduced,...
Studies on the selection of floral traits usually consider pollinators and sometimes herbivores. However, humans also exert ornamental plants. We compared preferences bumblebees ( Bombus terrestris ), thrips Frankliniella occidentalis for flowers snapdragon. From a cross two species, Antirrhinum majus linkianum , we selected four Recombinant Inbred Lines (RILs). characterised scent emission from whole stamens, pollen content viability, trichome density, shape, size colour parts. tested...
We present the first complete molecular phylogeny for genus Garuleum (Calenduleae, Asteraceae), which is endemic to South Africa and Namibia. To investigate phylogenetic relationships, sequence data from plastid trnL-trnF nuclear ITS were analysed with Parsimony Bayesian Inference approaches. The resolved as monophyletic G. bipinnatum shown species diverge group. Four well moderately supported subclades identified where distribution ranges within a subclade distinct. wide of was ascribed its...
A new species of Cryptolepis is described from Kenya and Tanzania. It a tropical forest climber its unique second corona whorl deeply cleft lobes distinguishes it all other species.
Rust fungi are important plant pathogens and have been extensively studied on crops other host plants worldwide. This study describes the heterecious life cycle of a rust fungus Digitaria eriantha (finger grass) Solanum species S. lichtensteinii (large yellow bitter apple), campylacanthum (bitter melongena (eggplant) in South Africa. Following field observations, inoculation studies involving telial isolates collected from produced spermogonia aecia lichtensteinii, campylacanthum, melongena....
The genus Steirodiscus Less. is revised, with full descriptions, nomenclature, illustrations and distribution data. Five species are recognised in two sections: sect. free involucral bracts Psilothonna connate into a smooth cup. S. linearilobus DC. established as an earlier name for schlechteri Bolus, which relegated to synonomy.
Distribution of Cryptolepis delagoensis (Periplocoideae–Cryptolepideae), a subcontinental southern African endemic and selection neotype.
A new Cryptolepis species from Kenya and Tanzania was named bifida L.Joubert & Venter. However, this name is a later homonym of (Blume) P.I.Forst. herewith corrected to ibayana