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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 21st 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

Association of Former SRC Presidents – first of its kind
2013-08-19

 

Some of the former SRC presidents who attended the inaugural dinner were, from the left: Roelf Meyer, Bloemfontein Campus 1970; Dr More Chakane, Qwaqwa Campus 1990; vice-chairperson of the AFSP; Dr Anchen Laubscher, first woman president of the Bloemfontein Campus 2003; and Prof Voet du Plessis, Bloemfontein Campus 1967/8.
Photo: Stephen Collett
19 August 2013

The University of the Free State (UFS) made history this weekend with the establishment of its Association of Former SRC Presidents (AFSP) – the first association of its kind after the merging and incorporation of public institutions in 2003–2004.

Twenty-two former SRC presidents attended the inaugural dinner to launch the association on Women's Day, Friday 9 August 2013, and recognised especially the attendance of all four female presidents that previously chaired the SRC. Other guests included former rectors and chairpersons of the UFS Council, as well as chairpersons of the Alumni.

The attending presidents served during the period 1967–2012, either at the former University of the Orange Free State (UOFS), the Qwaqwa Campus of the former University of the North, South Campus of the former Vista University and the University of the Free State.

“Your very personal narratives as former student leaders during the troubled past of our history in South Africa matter most as you design the questions for and purpose of an authentic conversation with student leaders today – this will set your association apart from others," said Rudi Buys, Dean of Student Affairs.

Former SRC president of 1975/6 and now founding member and chairperson of the association, Dr Michiel Strauss, said that this is the opportunity for former student leaders to give back to the younger generation.

“It is true that many middle-aged white South Africans have a deep sense of debt and obligation towards the youth of our country. We owe them an apology for the discrepancies of the past. This apology should be more than just words. Deeds of reconciliation and restitution must be seen.

“As for myself; I was president of the SRC of the then UOFS in the same period in which the biggest part of the youth of South Africa suffered so much in their struggle for freedom in our country.

“In my personal capacity, as well as in my official capacity as SRC president, I did nothing to try and understand and/or co-operate in the struggle of my peers. This fact haunts me until this day.

“The question then for people like me and so many others, is: Where do I invest my time and energy and passion for this country? Where will my contribution make a real difference? There is no better answer to this burning question than to invest in the human resources in our beloved South Africa, and more focused – to invest in the young people.

“There is something meaningful and beautiful happening at the UFS and it is now a leader in academic standards, reconciliation, leadership formation and nation building. I can think of no better place to make my small contribution,” Dr Strauss said.

“As former student leaders, we have a sense of purpose to contribute to the university and there is no better time to start than now. It is my privilege to be part of this great initiative and I look forward to what will be achieved,” said Dr More Chakane, deputy chairperson of AFSP and former SRC president of the Uniqwa Campus of the University of the North in 1990 (now the Qwaqwa Campus of the UFS).

Roelf Meyer, known for the prominent role he played in the negotiations to end apartheid in South Africa and chairperson of the Civil Society Initiative (CSI) of South Africa, said his time as a leader at the university has given him the opportunity to apply and use his skills and experience and share it with the new leaders of the institution. "The UFS is highly regarded because of the exceptional standards and excellence portrayed by its senior leadership. Where I can make a difference, I'll do it with pleasure and pride," he said. Meyer served as SRC president in 1970.

The association met on Saturday 10 August 2013 to adopt its interim constitution and consider operational matters, while also reaching agreement on its core functions in support of its purpose to transfer change leadership skills to incumbent student leaders and mediate meaningful contributions of Alumni to the growth of the university.

“We greatly value the declared intention of AFSP to work with the university to design meaningful and sustainable mentorship programmes to support and guide student leaders on campus, and have pledged our support in this regard,” said Buys.

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