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25 March 2022 | Story Leonie Bolleurs | Photo Charl Devenish
Prof Liezel Herselman Inuagural Lecture
At the inaugural lecture were from the left: Prof Danie Vermeulen, Dean of the Faculty of Natural and Agricultural Sciences, Prof Liezel Herselman, Dr Adré Minnaar-Ontong, Senior Lecturer in the Department of Plant Sciences and Subject Head of Plant Breeding, and Dr Molapo Qhobela, Vice-Rector: Institutional Change, Strategic Partnerships and Societal Impact.

Prof Liezel Herselman, Academic Head of the Department of Plant Sciences at the University of the Free State (UFS),) delivered her inaugural lecture on the Bloemfontein Campus this week (24 March 2022). The theme of the lecture was the ongoing battle against destructive cereal killers. 

With 28 years of extensive experience as a researcher, her work focuses on marker-assisted disease resistance breeding in wheat within a South African context. When she joined the UFS in 2004, Prof Herselman decided to apply her research expertise in marker-assisted breeding to the problems faced by wheat producers in the Free State and Northern Cape. The Free State is one of the major dryland wheat production areas in South Africa, while irrigation wheat is produced along the major rivers in the Northern Cape. 

Protection against fungal diseases

Concentrating specifically on Fusarium head blight (or wheat scab) and three rust diseases – leaf rust, stem rust, and stripe rust – she has done work to provide wheat plants with ‘tools’ to protect themselves against these fungal diseases.

According to Prof Herselman, there are many genes available in different wheat genotypes and related grass species that provide excellent protection against various races of these diseases. “Some of these genes provide protection or resistance from the seedling stage, while others provide resistance at the adult plant stage. We are thus aiming to combine as many of these genes as possible into a single wheat cultivar, without compromising yield and bread-making quality.”

She says the genes are combined by making crosses between resistant and susceptible cultivars or lines. Conventionally, through a time-consuming process, the incorporation of these genes is tested in the greenhouse and field by infecting plants with the disease to see which plants are resistant and which are not.

They can, however, follow the transfer of these genes to newly developed lines by applying molecular markers. Prof Herselman explains: “A molecular marker is a genomic fragment linked to the gene, which we can follow in the offspring we create from the crosses using different DNA techniques in the laboratory. This enables us to select new wheat lines that contain the highest number of resistance genes. The identified best lines are then used in further crosses and/or released as pre-breeding lines to commercial wheat breeding companies.”

Impact on food security

Her research has an impact on society by providing food security to both commercial and small-scale producers, as well as the end users of wheat (people buying bread and other wheat products). As researcher, it is also important for her to send out students to the workplace who can continue with this task in future.

Prof Herselman believes that when cultivars with fungal-disease tolerance or resistance are released and used by producers, it not only reduces the cost of spraying against diseases, but also increases yields by protecting the crop against fungal diseases. “We live in a world where the population is increasing daily, but land available for agriculture is not increasing and some areas are even lost due to urban development. Increasing yield in available production areas will thus have a positive impact on food security,” she says.

Besides contributing to the country’s food security, she takes pleasure in every aspect of her work. Although she misses the hands-on part of the work as academic head of the department and getting her hands dirty, she still enjoys managing the different research projects (from the conceptualisation phase to data analysis and publishing of results). The part she loves the most is to see the growth in her postgraduate students – from the moment they enter the laboratory for the first time until the day they walk out of the laboratory with their degrees. 

“It adds purpose to my life knowing that I have made a difference in a student’s life and equipped him or her with the necessary tools to be successful in the marketplace. Being able to share your knowledge is a gift, but with that gift comes a lot of responsibility as well. I am, however, up for the challenge,” concludes Prof Herselman. 

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Nat Nakasa the inspiration behind UFS academic’s PhD thesis
2017-01-09

 Description: 001 Dr Willemien Marais Tags: 001 Dr Willemien Marais

Photo: Supplied

“I’m interested in alternative ways of approaching things, so I wanted to look at how journalism can be used in an unconventional way to contribute to a developing society.”

This is why Dr Willemien Marais, a lecturer in the Department of Communication Science at the University of the Free State (UFS), decided to title her thesis: Nat Nakasa as existential journalist, describing a form of journalism that places emphasis on the individual’s experiences.

“Existentialism is a philosophy that provides scope for an individual approach to life, and I like Nat Nakasa’s writing because of his excellent sense of humour despite his horrific circumstances as a black journalist during apartheid,” she says.

A practical approach to writing

Dr Marais analysed Nat Nakasa’s approach to journalism through articles he wrote in the early 1960s. She searched for relevant themes of existentialist philosophy in Nakasa’s work in order to prove that he could be read as an existential journalist.

She mentions that in terms of contemporary relevance, Nakasa’s approach to journalism suggests that existentialism could provide the journalist with a practical approach to writing, especially for those journalists working in developing societies.

“The relevance of this approach lies in the fact that any society is always between things – the old and the new – which might require the journalist to operate outside the boundaries of conventional journalism.”

This study was qualitative in nature because of the interpretation required. She mentions that it was basically one of many possible interpretations of Nakasa’s work; with this one using existentialism as a lens.

An intellectually stimulating thesis

Dr Marais quotes French existentialist Jean-Paul Sartre, who said that interpreting someone’s work, especially someone who was no longer alive, was open to “thousands of shimmering, iridescent, relevant meanings”, and her research represents one of these possible meanings of Nakasa’s work as a journalist.

When asked how long she had worked on her thesis, Dr Marais simply answered “too long!” She mentions that her thesis was initially more of an intellectual exercise. Whereas the actual act of writing took about four months, she spent many years thinking about the topic. “Now that all is said and done, I realise I had to grow into the topic. It took me a while to realise that true understanding does not come overnight!”

Dr Marais mentions that other than herself and the work of Nat Nakasa, there were no other roleplayers involved. “For many, many years it was just Nat Nakasa and I. It was frustrating and exhilarating all at the same time.”

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