Botma Visser
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View article: First Report of Rust Caused by <i>Phakopsora nishidana</i> on <i>Ficus natalensis</i> in South Africa
First Report of Rust Caused by <i>Phakopsora nishidana</i> on <i>Ficus natalensis</i> in South Africa Open
Rust, caused by Phakopsora nishidana, is a damaging disease of edible fig, Ficus carica, in South Africa (Boshoff et al. 2022). The occurrence of rust pustules on the lower surface of F. natalensis leaves (natal fig or coastal strangler fi…
View article: Triazole sensitivity among South African <i>Puccinia graminis</i> f. sp. <i>tritici</i> isolates
Triazole sensitivity among South African <i>Puccinia graminis</i> f. sp. <i>tritici</i> isolates Open
View article: Comparative genomics identifies genetic markers linked to structural variations that differentiate <i>Puccinia graminis tritici</i> and <i>secalis formae speciales</i>
Comparative genomics identifies genetic markers linked to structural variations that differentiate <i>Puccinia graminis tritici</i> and <i>secalis formae speciales</i> Open
Stem rust is a serious disease of many gramineous plants including small grain staples such as wheat, barley, rye and triticale. Separate formae speciales (ff. spp.) of the causal fungus, Puccinia graminis , predominantly infect certain ho…
View article: Pathogenicity of Puccinia porri on Allium in South Africa
Pathogenicity of Puccinia porri on Allium in South Africa Open
Allium crops are commonly grown in South Africa and harvested as either fresh produce for the domestic and export markets or as seed. Apart from occasional outbreaks on garlic, rust is problematic as a cosmetic disease with unappealing ure…
View article: Genome-Enabled Analysis of Population Dynamics and Virulence-Associated Loci in the Oat Crown Rust Fungus <i>Puccinia coronata</i> f. sp. <i>avenae</i>
Genome-Enabled Analysis of Population Dynamics and Virulence-Associated Loci in the Oat Crown Rust Fungus <i>Puccinia coronata</i> f. sp. <i>avenae</i> Open
Puccinia coronata f. sp. avenae ( Pca) is an important fungal pathogen causing crown rust that impacts oat production worldwide. Genetic resistance for crop protection against Pca is often overcome by the rapid virulence evolution of the p…
View article: Genome-enabled analysis of population dynamics and virulence associated loci in the oat crown rust fungus<i>Puccinia coronata</i>f. sp.<i>avenae</i>
Genome-enabled analysis of population dynamics and virulence associated loci in the oat crown rust fungus<i>Puccinia coronata</i>f. sp.<i>avenae</i> Open
Puccinia coronata f. sp. avenae ( Pca ) is an important fungal pathogen causing crown rust that impacts oat production worldwide. Genetic resistance for crop protection against Pca is often overcome by the rapid virulence evolution of the …
View article: Accumulation of complex oligosaccharides and CAZymes activity under acid conditions constitute the Thatcher+Lr9 defence responses to Puccinia triticina
Accumulation of complex oligosaccharides and CAZymes activity under acid conditions constitute the Thatcher+Lr9 defence responses to Puccinia triticina Open
Puccinia triticina ( Pt ) is an important pathogen of wheat. While breeding programmes develop resistant wheat cultivars to mitigate the effects of such rust-causing pathogens, the emergence of new rust races with wider virulence mandates …
View article: Flagging defensive roles of carbohydrate-active enzymes (CAZymes) and carbohydrates during Puccinia triticina-wheat interactions
Flagging defensive roles of carbohydrate-active enzymes (CAZymes) and carbohydrates during Puccinia triticina-wheat interactions Open
Puccinia triticina (Pt) infects wheat, leading to colonization of leaf tissues, pustule formation on the leaf and eventually yield loss. Fungicides and breeding techniques are used to manage Pt infection in wheat. However, there is a growi…
View article: Triazole Fungicide Sensitivity Among South African Puccinia Graminis F. Sp. Tritici Isolates
Triazole Fungicide Sensitivity Among South African Puccinia Graminis F. Sp. Tritici Isolates Open
View article: Fig rust caused by Phakopsora nishidana in South Africa
Fig rust caused by Phakopsora nishidana in South Africa Open
Fig rust, caused by Cerotelium fici, was first recorded in South Africa in 1927. Recent observations have revealed high incidence of rust and untimely defoliation of fig trees (Ficus carica) in residential gardens and commercial orchards. …
View article: The life cycle of <i>Puccinia digitariae</i> on <i>Digitaria eriantha</i> and <i>Solanum</i> species in South Africa
The life cycle of <i>Puccinia digitariae</i> on <i>Digitaria eriantha</i> and <i>Solanum</i> species in South Africa Open
Rust fungi are important plant pathogens and have been extensively studied on crops and other host plants worldwide. This study describes the heterecious life cycle of a rust fungus on Digitaria eriantha (finger grass) and the So…
View article: Accomplishments in wheat rust research in South Africa
Accomplishments in wheat rust research in South Africa Open
Rust diseases, although seasonal, have been severe constraints in wheat production in South Africa for almost 300 years. Rust research gained momentum with the institution of annual surveys in the 1980s, followed by race identification, an…
View article: Endemic and panglobal genetic groups, and divergence of host-associated forms in worldwide collections of the wheat leaf rust fungus Puccinia triticina as determined by genotyping by sequencing
Endemic and panglobal genetic groups, and divergence of host-associated forms in worldwide collections of the wheat leaf rust fungus Puccinia triticina as determined by genotyping by sequencing Open
The wheat leaf rust fungus, Puccinia triticina, is found in the major wheat growing regions of the world and is a leading cause of yield loss in wheat. Populations of P. triticina are highly variable for virulence to resistance genes in wh…
View article: Emergence of the Ug99 lineage of the wheat stem rust pathogen through somatic hybridisation
Emergence of the Ug99 lineage of the wheat stem rust pathogen through somatic hybridisation Open
View article: Emergence of the Ug99 lineage of the wheat stem rust pathogen through somatic hybridisation
Emergence of the Ug99 lineage of the wheat stem rust pathogen through somatic hybridisation Open
Parasexuality contributes to diversity and adaptive evolution of haploid (monokaryotic) fungi. However non-sexual genetic exchange mechanisms are not defined in dikaryotic fungi (containing two distinct haploid nuclei). Newly emerged strai…
View article: Multilocus Genotypes of the Wheat Leaf Rust Fungus <i>Puccinia triticina</i> in Worldwide Regions Indicate Past and Current Long-Distance Migration
Multilocus Genotypes of the Wheat Leaf Rust Fungus <i>Puccinia triticina</i> in Worldwide Regions Indicate Past and Current Long-Distance Migration Open
Many plant pathogenic fungi have a global distribution across diverse ecological zones and agricultural production systems. Puccinia triticina, the wheat leaf rust fungus, is a major pathogen in many wheat production areas of the world. Th…
View article: VCF file of SNP data of 556 isolates of the wheat leaf rust fungus, Puccinia triticina from 11 world-wide regions
VCF file of SNP data of 556 isolates of the wheat leaf rust fungus, Puccinia triticina from 11 world-wide regions Open
This a file of ca. 6500 SNPs of 556 isolates of the wheat leaf rust fungus, Puccina triticina from 11 worldwide regions that were mapped to the reference genome. This data was used to examine the population structure of Puccinia triticina …
View article: Microsatellite Analysis and Urediniospore Dispersal Simulations Support the Movement of <i>Puccinia graminis</i> f. sp. <i>tritici</i> from Southern Africa to Australia
Microsatellite Analysis and Urediniospore Dispersal Simulations Support the Movement of <i>Puccinia graminis</i> f. sp. <i>tritici</i> from Southern Africa to Australia Open
The Australian wheat stem rust (Puccinia graminis f. sp. tritici) population was shaped by the introduction of four exotic incursions into the country. It was previously hypothesized that at least two of these (races 326-1,2,3,5,6 and 194-…
View article: Potential for re-emergence of wheat stem rust in the United Kingdom
Potential for re-emergence of wheat stem rust in the United Kingdom Open
View article: Identification of naturalized and cultivated Berberis species in South Africa
Identification of naturalized and cultivated Berberis species in South Africa Open
View article: Genetic diversity in Puccinia triticina causing wheat leaf rust in South Africa
Genetic diversity in Puccinia triticina causing wheat leaf rust in South Africa Open
View article: Proteomic analysis and photosynthetic response of wheat treated with a Lupinus albus L. seed suspension
Proteomic analysis and photosynthetic response of wheat treated with a Lupinus albus L. seed suspension Open
View article: The timing and molecular features of adult plant resistance in wheat against stem rust
The timing and molecular features of adult plant resistance in wheat against stem rust Open