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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

New guidelines to increase diversity in student residences at the UFS
2007-06-08

As from 2008, the University of the Free State (UFS) will implement new policy guidelines for student residences so as to increase diversity on the Main Campus of the UFS in Bloemfontein.

These new policy guidelines were approved by the Council of the UFS today (Friday 8 June 2007) after consultations with a range of stakeholders, especially students currently in residences, student leaders and student organisations, with inputs received from alumni and parents as well.

According to a statement by the Chairperson of the UFS Council, Judge Faan Hancke, and the Rector and Vice-Chancellor of the UFS, Prof. Frederick Fourie, the guidelines are based on an educational rationale with a definite educational objective.

“What the UFS seeks to do with these new policy guidelines, is to overcome the racial divides of the past and equip students in residences with the knowledge and skills to understand people from other cultures, appreciate other languages and to respect differences in religion but also economic background,” Judge Hancke and Prof. Fourie said in their statement.

“This will give students in UFS residences a distinct advantage over many other work seekers in South Africa, because the workplace today is a very diverse place with people of many backgrounds,” Judge Hancke and Prof. Fourie said in their statement.
They said the UFS wanted to establish a new model of residence life in which students will voluntarily embrace diversity and learn about diversity so as to add value to their educational experience in a residence.

In the late 1990s the UFS made the first attempt to integrate its residences which led to violent clashes between white and black students. A compromise agreement was reached based on freedom of association but this has over the years led to the current situation of largely white and largely black residences.

To support students during the implementation of the new policy guidelines, the management of the UFS will establish several mechanisms and programmes for students to empower them, to build their capacity and to facilitate a smooth transition to a new model of student life in the residences.

Judge Hancke and Prof. Fourie said the decision is another important milestone in the ongoing transformation of the UFS and in the provision of quality higher education for all UFS students, and that the decision had been taken in the best interests of the students.

“This is a very carefully managed transition to bring about a non-racial character to our student residences in line with the Constitution and the ethos of a democratic South Africa,” Judge Hancke and Prof. Fourie said.

How the new policy will work in practice

As from 2008, the new policy aims to bring about an important shift in the way first-years are placed in a residence. From 2008 first-year students are to be placed to achieve a minimum diversity level of 30% in each junior residence.

In senior residences a mix of approximately 50-50 will be the goal from 2008.
Residences will be responsible for placing 50% of first-years, which gives them the scope to increase diversity. The university’s accommodation service will place the other 50%. All these placements must occur in accordance with the educational rationale and the related diversity objective.

If a residence cannot reach the diversity objectives, the university will use the 50% of placements that it controls to achieve sufficient diversity in a particular residence.

Support mechanisms for students

According to Dr Ezekiel Moraka, Vice-Rector: Student Affairs, students in the residences will not be left on their own to deal with the issues of diversity. The management of the UFS has identified several important areas where the process may need support, especially in the early stages of implementation. Students and student leadership will be involved in the further design and finalisation of the implementation details.

These areas where support will be finalised are the following:

  • Providing properly trained and qualified personnel (such as live-in wardens, residence heads etc.) to supervise the implementation of the policy on a 24-hour basis;
  • Ongoing orientation workshops for all students in residences to deal with diversity in a mature way;
  • Support to deal with language issues, including interpreting services so that language rights of all students can be respected; and
  • Assistance with the review of residence governance, administrative and other procedures that have been used in residences up to now.

“There can therefore be no doubt that the management is committed to the well-supported and successful implementation of this new policy and to giving the best possible education to all our students,” Judge Hancke and Prof Fourie said.

Media release
Issued by: Lacea Loader
Assistant Director: Media Liaison
Tel: 051 401 2584
Cell: 083 645 2454
E-mail: loaderl.stg@ufs.ac.za
8 June 2007
 

 
 

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