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Plant Sciences graduate contributes technique to manage stem rust

08 October 2020 | Story Leonie Bolleurs | Photo Supplied

Dr Cornel Bender received her PhD qualification at the virtual graduation ceremonies in October. The title of her thesis is: Stem rust resistance in South African wheat and triticale.

The rapid distribution of disease-causing organisms such as Ug99, a wheat stem-rust pathotype, pointed out just how vulnerable global cereal production is to disease outbreaks.

These cereals include wheat, barley, rye, oats, triticale, rice, maize, and millet and are one of the most important food sources for human consumption.

According to Dr Cornel Bender, the projected world population of 10 billion in 2057 requires a growth of more than 40% in cereal production. Wheat is grown on more hectares than any other cereal and is one of the most important sources of calories for humans. However, the growth rate of wheat yields has declined from the 1960s to the 1990s. Therefore, it is essential to increase global wheat production.

“With the regular appearance of more aggressive stem rust pathotypes in South Africa, there is a constant need to discover new sources of resistance, understand the genetic base of presently deployed sources in wheat, triticale and barley cultivars, and to manipulate the deployment of resistant sources through a more sustainable approach,” says Dr Bender.

Her PhD thesis, titled: Stem rust resistance in South African wheat and triticale, includes various fundamental aspects for the effective management of stem rust in South Africa.

Dr Bender is a Professional Officer in the Division of Plant Pathology in the Department of Plant Sciences, who received her PhD at the virtual graduation ceremonies in October.

Innovative and cost effective

Her promotors, Prof Zakkie Pretorius, Research Fellow, and Dr Willem Boshoff, Senior Lecturer in the Department of Plant Sciences, believe that she used an innovative approach to develop a cost-effective phenotyping method to select for more durable resistance types in a controlled greenhouse environment.

“In the past, results obtained from field trials used to assess adult plants for stem-rust resistance, were often influenced by abiotic factors, were seasonable in nature, expensive, and time consuming; therefore, the development of a dependable greenhouse screening system provides an important additional instrument for rust research,” says Dr Bender.

She adds that the greenhouse technique is used worldwide to screen for adult plant resistance and contribute to save time and money.

Broadening our knowledge

“Inheritance studies were undertaken to determine the genetic base of stem-rust resistance in selected South African wheat and triticale cultivars (developed from wheat/rye crosses) through seedling analysis as well as greenhouse and fieldwork,” she says.

Dr Bender believes the use and development of different resistance screening methods, the elucidation of host genetics, as well as the use of histological and microscopic methods to study early resistance responses, broaden our knowledge and understanding of stem-rust resistance in South African wheat and triticale cultivars.

Ultimately, rust researchers, grain producers, and also the general public – through access to their daily bread – will benefit from her study.

News Archive

UFS sets trend for higher education institutions

2005-09-21

The University of the Free State (UFS) offers more service-learning courses than any other higher education institution in the country and has the highest number of students enrolled for these service-learning courses.

This was the research findings on higher education institutions conducted between 2001 and 2004 by the Joint Education Trust (JET) into service-learning courses. These are courses which seek to integrate service to the community into the academic core of higher education institutions.

The results of this research indicated that the UFS is one of the few higher education institutions in South Africa that have made progress in integrating community engagement into the mainstream academy.

According to the findings 2 233 students at the UFS participated in service-learning courses supported by JET, while 858 students at the University of Transkei (UNITRA), 636 students at the University of the Western Cape (UWC) and only 600 students at the University of the Witwatersrand (WITS) participated in service-learning courses.

In total there were 6 930 students participating in service learning courses supported by the JET at 10 institutions throughout the country.

The research also found that out of a total of 182 service-learning courses supported by JET countrywide, the UFS had the highest number of such courses at 42, followed by WITS with 28, the University of Kwazulu Natal with 26, UWC 24 and UNITRA with 22.

Nationally, most of the service-learning courses at higher education institutions are offered in the human sciences (62), followed by health sciences (37), education (26), agriculture (14), and economic sciences (11).

According to leading academics, service-learning is a credit-bearing, educational exercise in which students participate in an organised service activity that meets identified community needs and helps the student to gain a deeper understanding of course content and a sense of civic responsibility.

Reacting to the research findings, the Rector and Vice-chancellor of the UFS, Prof Frederick Fourie, said the university feels strongly that there should be integration of service-learning into the academic core of the institution.

“Through service-learning modules the UFS can give expression to its role of service to the community as an institution of higher learning, producing quality graduates who understand the communities in which they will have to function for the rest of their lives,” Prof Fourie said.

According to Mr Jo Lazarus, the project manager of the Community-Higher Education – Service Partnership (CHESP), which falls under the JET, a number of institutions have identified community engagement as a strategic priority and have allocated significant resources from their central budget towards its implementation.

Mr Lazarus said most students have an overwhelmingly positive attitude towards service learning.

“A large percentage of students surveyed indicated that their service-learning course helped to improve their relationship skills, leadership skills and project planning abilities. As significant is the fact that these courses also benefited them in terms of their awareness of cultural differences and opened their eyes about their own cultural stereotypes,” said Mr Lazarus.

“The key challenge still hampering the integration of service-learning as a core function of academic activity is that some institutions still see service-learning as an add-on, and nice-to-have activity,” he said.

According to Mr Lazarus higher education must demonstrate social responsibility and commitment to the common good by making available expertise and infrastructure for service-learning as a form of community engagement.

Media release
Issued by:  Lacea Loader
   Media Representative
   Tel: (051) 401-2584
   Cell: 083 645 2454
   E-mail: loaderl.stg@mail.uovs.ac.za
   20 September 2005

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