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10 June 2020 | Story Leonie Bolleurs | Photo Supplied
Prof Zakkie Pretorius, left, plays a significant role in providing pathology support to the plant breeding industry.Prof Liezel Herselman contributes to plant breeding in Southern Africa by training and mentoring the plant breeders of the future.

The Southern African Plant Breeders’ Association (SAPBA) recently bestowed prestigious awards upon Prof Zakkie Pretorius, Research Fellow in the Department of Plant Sciences at the University of the Free State (UFS), and Prof Liezel Herselman, Associate Professor in the same department. This institution strives to maintain high ethical standards and norms, contributing to stable, sustainable agriculture.

During the 13th Southern African Plant Breeders’ Association symposium, Prof Herselman was presented with a Fellow Award and Prof Pretorius with Honorary Membership. They received the awards for their services to and promotion of the SAPBA objectives, together with their exceptional contributions to plant breeding. 

Provide food for the nation
Over the years, Prof Pretorius, who has extensive expertise in diseases of field crops – more specifically the rust diseases of small grain cereal crops – has played a significant role in providing pathology support to the plant breeding industry. He has also conducted ground-breaking pathology research on rust diseases in field crops. In 2019, he co-authored an article that appeared in Nature, the world’s leading multidisciplinary science journal. He is also shortlisted as a 2020 finalist in the Lifetime Award and Special Theme Award (Plant Health) of the National Science and Technology Forum. Furthermore, he regularly attended and participated in biennial conferences and supervised plant breeding students working on plant disease projects. 

Prof Herselman contributes to plant breeding in Southern Africa by training and mentoring the plant breeders of the future. “As a lecturer of fourth-year and honours Plant Breeding students, as well as supervisor and promoter of master’s and doctoral students, I am in the fortunate position to teach and mentor my students in one of the newest fields of plant breeding, namely marker-assisted plant breeding. All future plant breeders need this knowledge to make a success of their breeding programmes. Our students are the future plant breeders who will provide food to the nation,” she says. 

"As a plant pathologist, I am privileged to have been able to contribute to the quest for disease resistance in crop improvement and to have been recognised for it.” – Prof Zakkie Pretorius
The highest honour
Prof Pretorius view recognition by the industry – in this case, the plant breeding fraternity – as the highest honour for someone working in agricultural science. “As a plant pathologist, I am privileged to have been able to contribute to the quest for disease resistance in crop improvement and to have been recognised for it. I am also extremely grateful to colleagues and co-workers who have contributed over many years to the establishment of a productive and influential research group at the UFS,” he says.

Prof Herselman shares this sentiment. She says: “It means so much to me to know that I have made a difference and an impact on my students’ lives. It is a privilege to have the opportunity to work with under- and postgraduate students and to see them grow.”

She continues: “We strive to send out well-rounded students who can make a difference in the workplace and the community. This award means that I have succeeded in this goal, even though I do my work because I am passionate about it and not to receive recognition.”

Fight against fungal disease continues
Prof Pretorius continues to be involved in studies on host plant resistance and pathogenic variability. 

As a molecular plant breeder, Prof Herselman is pushing on with research focusing on the development of wheat lines with improved disease resistance. The work that she is doing makes a difference on both national and international level. “As part of my current research programme, we have made rust- and Fusarium head blight-resistant wheat lines available to South African breeding companies for use in their breeding programmes. The lines developed at the UFS will in a small way contribute towards the fight against fungal diseases in South Africa, thus securing the yield and livelihoods of farmers and consumers,” she says.

Her master’s and doctoral students who have completed their studies, also take the knowledge they gained at the UFS back to their countries and workplaces where they ultimately add value, especially contributing towards the fight against hunger. 

"“We strive to send out well-rounded students who can make a difference in the workplace and the community. This award means that I have succeeded in this goal, even though I do my work because I am passionate about it and not to receive recognition.” – Prof Liezel Herselman

News Archive

Dr Charlotte Boucher and Lindi Heyns examine possible anti-microbial activity in the skin of Western olive toad species
2014-12-22

 

Researchers Lindi Heyns and Dr Charlotte Boucher are working together on an interdisciplinary project between the Departments of Zoology and Entomology and Veterinary Biotechnology at the University of the Free State (UFS). The focus of their research is on the preliminary biochemical description of skin secretions in some South African toads.

The project forms part of an Honours study executed by Dwayne Pike under Heyns’ supervision. He is co-supervised by Dr Boucher who is assisting with the biochemical and microbiological assays.

Dr Boucher said, “Amphibians are characterised by the presence of cutaneous glands spread over the skin. There are two types of glands, namely mucous and granular (poison), located on the inner surface of the epidermis. Mucous glands are widely dispersed over the skin, while granular glands can be grouped and enlarged in specific regions. Mucous glands are generally associated with maintenance of humidity and cutaneous respiration, whereas granular glands function in chemical defence against predators and/or microbial infection. Studies indicate that the compounds produced by the granular glands belong to numerous chemical classes with diverse pharmacological activities.”

The products secreted by granular glands are rich in low molecular weight constituents of varied molecular types, including proteins, peptides and toxins. These secretions make the toad foul-tasting to predators and even toxic to other frog species. In addition, amphibians offer an attractive source of novel antimicrobials. Studies indicate that as a response to inhabiting microorganism-rich environments they synthesise and secrete a diverse array of antimicrobial peptides (AMPs) as an innate form of defence. Extensive research by various other research groups has been carried out on antimicrobial peptides of the genus Rana; however, hardly any studies have investigated the antimicrobial activity of African frog species.

The focus of this preliminary project is to determine the protein composition of the glandular secretions of the Western olive toad (Amietophrynus poweri), using biochemical tests, such as SDS-PAGE also known as protein gel electrophoresis combined with mass-spectrometry used to identify unknown peptides and proteins. This will give us an overview of the composition of the glandular secretions. Furthermore, we are also looking at microbiological tests, which include assays that test for possible anti-microbial activity against various bacterial and fungal species.

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