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Food security dominant driver of plant pathology research in future

05 April 2022 | Story Leonie Bolleurs | Photo Supplied

WJ swart — Prof Wijnand Swart believes a ‘systems level understanding’ of phytobiomes (consisting of plants, their environment, and all their associated organisms) will enable us to produce sufficient crops to meet global demands while minimising negative impacts on our environment.

Plant health is important for the survival of our planet and all its living creatures. Now, imagine an instrument that contains a DNA chip from virtually every known plant pathogen, where one can simply snip off a piece of the infected plant material, slip it into the ‘plant disease tricorder’, and within seconds you have not only a diagnosis of the disease, but all the information about its control too.

According to Prof Wijnand Swart, Professor of Plant Pathology in the Department of Plant Sciences at the University of the Free State (UFS) and President of the Southern African Society for Plant Pathology (SASPP), this concept might be a bit far-fetched, but is a distinct possibility for the not-too-distant future. “Without a doubt …,” he believes.

He was recently a guest on a series of radio talks on plant health in South Africa, hosted by the National Science and Technology Forum (NSTF) in partnership with Plaas/Farm TV (YouTube broadcaster). His talk on the topic, Whither (or wither) Plant Pathology in the next 50 years, was specifically focused on understanding the latest research and dynamics of the discipline in a South African context.

In terms of this futuristic perspective, he says collaboration between plant pathologists and biomedical and aeronautical engineers, nanotechnologists, and computer scientists will aid the development of micro-sensory technologies for the detection of new plant diseases that are relevant to biosecurity, plant disease diagnostics, and epidemiological modelling.

In his discussion, Prof Swart referred to the work of Prof John Lucas, former Head of Plant Pathology and Microbiology at the Rothamsted Research Station in the United Kingdom, who believes that there are three key issues facing plant pathologists in the 21^st century. These are the strengthening of food security while simultaneously safeguarding the health of associated ecosystems and reducing the dependency on natural resources; the creation of pest and disease control systems that are sustainable and not compromised by the evolution of pest and pathogen strains; and the development of suitable crop protection technologies.

Future technologies

Based on the work of Prof Lucas, Prof Swart states that future technologies in plant health will develop in five areas. In the first area, he says DNA-based technologies will greatly increase the speed, sensitivity, and accuracy of pest and pathogen detection and diagnosis.

Also key here, is the integration of nanomaterials into disease management strategies and diagnostics. He says in the past decade, the use of nanotechnology in phytopathology has grown exponentially. According to him, nanotechnology can increase productivity using nano-pesticides and nano-fertilisers, improve soil quality by means of nano-zeolites and hydrogels, stimulate plant growth using nanomaterials, and provide smart monitoring via nano-sensors and wireless communication devices.

Prof Swart says according to Prof Lucas, the second area in which plant health technologies will grow is plant defence and immunity. When induced, plant resistance primes plants to deal with a diversity of biotic and abiotic stresses. Prospects of inducing chemically modulated plant resistance via biological agents (such as engineered microbes), might result in low-cost seed treatments, thereby removing the need for expensive chemical spray regimes.

Technology development in plant health will also become more evident in genetic diversification. Prof Swart believes sequencing the genomes of major crop species and their wild relatives will expand the known gene pool and diversify genetic resources available to plant breeders.

According to him, a new era is beckoning, where the prospect of crop pharmacology based on signal molecules and their receptors will become a reality. It will be based on the development of novel chemistries designed to manipulate specific molecular targets, by either regulating host resistance or disabling the disease-causing processes of pathogens.

The fifth area in which plant health technologies will develop, is ecological approaches to disease control. He says by understanding the ecology of pathogens, our ability to exploit their natural enemies will improve. Ecological approaches to plant disease control will have a significant impact on the introduction of invasive pathogen species, while the effect of climate change will influence the emergence of new plant diseases and epidemics. He strongly believes that it is important to take a holistic approach to understanding how and why plant pathogenesis occurs if we are to manage diseases effectively.

Future challenges

The development of these new technologies is very important, as there are several challenges that plant pathology will face in the future. These include the increasing demand for food to support the growing global population; the decreasing production potential of agriculture due to competition for fertile land; the increased risk of plant disease epidemics resulting from agricultural intensification; the depletion of natural resources; and the influence of climate change on interactions between plants and their pests or pathogens.

Prof Swart believes a ‘systems level understanding’ of phytobiomes (consisting of plants, their environment, and all their associated organisms) will enable us to produce sufficient crops to meet global demands while minimising negative impacts on our environment.

He concludes, saying that plant pathology will evolve as an interdisciplinary science. He adds that future research will focus on new problems that are traditionally seen as outside the core discipline of plant pathology. Furthermore, food security will be a dominant and important driver of plant pathology research, while the impact of climate change on plant diseases will be very significant. Finally, that the adaptive potential of plant and pathogen populations will be one of the most important predictors of the magnitude of climate change effects.

LISTEN: radio interview

News Archive

UFS awards honorary doctorates during its centenary week

2004-10-07

The University of the Free State (UFS) will award 12 honorary doctorates on Thursday 14 October 2004 to a diverse group of outstanding South Africans and international experts.

This will be the last in a group of 18 honorary doctorates that the UFS will be awarding in its centenary year.

The awards comprise of a number of well-known language experts and writers, experts in higher education, first-time awards in community service and development studies, as well as music.

“This reflects quality and also diversity, a spectrum of convictions as well as the recognition of persons who played a major role in changing society in the last couple of decades, “ says Prof Frederick Fourie, Rector and Vice-Chancellor of the UFS.

The awards can be grouped in the following categories:

Language and literature:

Mr Karel Schoeman (D Litt (hc)) – well-known Afrikaans author and former student of the UFS. Some of the awards he has received include the Hertzog prize for prose (1970, 1986 and 1995), the CNA prize (1972 and 1994), the Old Mutual prize (1985 and 1991), the SABC prize for best television drama in 1990, the M Net book prize in 1997 and the State President award (former President Nelson Mandela: Order for Excellent Service – silver) in 1999. It is an honor for the UFS to have this gifted and creative person among its former students. This conferment is a fitting recognition of his status as leading South African writer.

Ms Antjie Krog (D Litt (hc)) – well-known South African poet and former student of the UFS. Her popularity as poet is evident in her piercing honesty and unequalled power of expression. Some of the awards she has received include the Eugéne Marais prize in 1973, the Rapport prize in 1987, the Hertzog prize in 1990 and the RAU prize in 2000. Her writing has been translated into seven languages. She has also received numerous honors for her involvement in and journalistic documentation of the Truth and Reconciliation Commission’s (TRC) proceedings. It is therefore an exceptional privilege for her alma mater to honor her with an honorary doctorate.

Prof Jaap Steyn (D Litt (et phil) (hc)) – recently, Prof Steyn again distinguished himself as biographer whose thorough research is apparent in the published biographies of illustrious writers such as NP van Wyk Louw and MER. The numerous awards, among which the Stals prize from the South African Academy of Science and Art for the Van Wyk publication, are a matter of record. He conducted the research for this great prize-winning work as honorary professor at the UFS.

Prof Jakes Gerwel (D Phil (hc)) – Chancellor of the University of Rhodes and Director of Naspers, Old Mutual, Gold Fields and Brimstone. His doctoral thesis was published in The Netherlands under the title Literatuur en apartheid. Konsepsies van “gekleurdes” in die Afrikaanse roman tot 1948 (1983). He received an honorary doctorate from Clark College ( Atlanta), the City University of New York and Missouri in the USA, the University of the Western Cape, the University of Cape Town, the University of Natal, Rhodes University, the University of Stellenbosch and the University of the Witwatersrand. He is also outstanding professor in the Humanities at the University of the Western Cape, honorary professor in the Humanities at the University of Pretoria, and was the chairman of the Human Sciences Research Council (HSRC).

Development Studies:

Dr Frederick van Zyl Slabbert (D Phil (hc)) – for his academic achievements, his endeavors for bringing about a peaceful transition in South Africa and his demonstration of the social investment role of the corporate sector. Dr Van Zyl Slabbert has received honorary degrees from the University of Natal and the Simon Fraser University in Canada. He has published seven books and various academic articles.

Community Service:

Prof Robert G Bringle (D Phil (hc)) – from the Indiana University-Purdue University Indianapolis (IUPUI) in the USA. He is currently Chancellor’s Professor of Psychology and Philanthropic Studies at the IUPUI and also Director of the IUPUI’s Centre for Service Learning. He is honored for his exceptional contribution to several of the UFS’s community service projects as well as his role in the advancement of a multi- and inter-disciplinary approach to academic development and the integration of service learning within the faculties of the UFS. He has also made a valuable contribution to the conceptual framework of the UFS’s unique community service policy and more recently to the advancement of a research culture regarding community service.

Higher education:

Dr Khotso Mokhele (D Phil (hc)), President of the National Research Foundation (NRF) is honored for his contribution to the South African higher education sector. He has also made a substantial contribution to the development of the research capacity of universities and technikons in South Africa. Dr Mokhele was born in Bloemfontein and matriculated at the Moroka High School in Thaba Nchu.

Prof Saleem Badat (D Phil (hc)), the Chief Executive Officer of the Council on Higher Education (CHE). Prof Badat has devoted himself to transforming and building South African higher education, and has constantly challenged the higher education sector to retain the moral basis of higher education and tackle its challenges with intellectual honesty, ingenuity, creativity and courage. He is honored for his intellectual leadership in the development of a equitable, just and quality higher education system in South Africa.

Law:

Prof HA (Boelie) Wessels (D Legum (hc)) – for his contribution to the fields of Roman Law, Legal History at the UFS. He is currently a part-time lecturer at the UFS’s Faculty of Law.

Medicine:

Prof CJC Nel (D Phil (hc) Posthumous) – for the way in which he strived for the advancement of excellent medical education in the country. Prof Nel also did pioneering work in the field of transformation in higher education. Under his guidance the School of Medicine at the UFS became one of the first medical schools to adopt a parallel-medium system of instruction.

Music:

Prof Leo Quayle (D Mus (hc)) – for the significant contributions he has made to the development of music – not only in Bloemfontein, but also on national level and abroad. His initiative, enthusiasm and dedication contributed to the eventual founding of the Free State Musicon, as well as the first symphony orchestra and the first string quartet in Bloemfontein. Prof Quayle is a former head of the Department of Music at the UFS.

Prof Jack de Wet (D Mus (hc)) – well-known for his exceptional contribution to violin tuition in South Africa. As pedagogue of international stature, he still moulds violinists who compete at national and international level. At an advanced stage of his career, he still actively conveys his knowledge, experience and distinctive insight in his field of speciality to yet another new generation of young violin teachers. Today the symphony orchestras in Bloemfontein and Port Elizabeth also stand on the foundations laid by him.

Media release
Issued by: Lacea Loader
Media Representative
Tel: (051) 401-2584
Cell: 083 645 2454
E-mail: loaderl.stg@mail.uovs.ac.za
7 October 2004

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