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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

Multidisciplinary conference on TB control

2003-09-22

Theme: Tuberculosis control: a multidisciplinary approach to research, policy and practice Venue: CR Swart Auditorium, University of the Free State Campus, Bloemfontein Date: 11 and 12 November 2003 Time: 11 November, 19:00-20:30 AND 12 November 08:30-17:00

Tuesday, 11 November - 19:00-20:30 (registration from 18:30) and Wednesday, 12 November - 08:30-17:00 (registration from 07:30)

The Honourable MEC for Health in the Free State will officially open the Conference on the evening of 11 November, while Prof Frederick Fourie (Vice-Chancellor and Rector of the University of the Free State) will attend to the welcoming. In addition, Prof Françoise Portaels (Institute of Tropical Medicine, Belgium) and Dr Refiloe Matji (National Department of Health, South Africa) will respectively present a global and a South African perspective on TB. The majority of the presentations will follow on 12 November.

Main thrust of Conference

The main thrust of the Conference is to disseminate both research results and policy/managerial matters relevant to TB and TB control, and to facilitate discourse among researchers and health policy makers/managers/practitioners in the field of TB control. Presenters of papers, as well as delegates are, therefore, drawn from both academic/research institutions, and from health service sectors involved in TB control in all provinces and in neighbouring countries.

Topics of presentations

A variety of topics will be dealt with during presentations, such as: New challenges in the global control of MDR-TB New strategies and policies on MDR-TB in South Africa A South African perspective on TB control A provincial perspective on implementing the national TB control policy

The role of the public district hospital in TB control Tuberculosis control through DOTS Case detection strategies

TB in children Hospital to clinic: is this the missing link? Patient compliance with DOT for TB Challenges for effective health communications in a multicultural context

The economics of TB Frequency of multiple infections with M. tuberculosis in pulmonary TB patients HIV/AIDS and TB, etc.

Speakers

Among the speakers will be Dr Victor Litlhakanyane (Head of Health: Free State); Prof Françoise Portaels and Dr Leen Rigouts (Institute of Tropical Medicine, Belgium); Dr Reliloe Matji (Director: NTBC Programme); Ntsiki Jolingana (Director: HIV, AIDS, TB and Communicable Diseases, Free State) and Annatjie Peters (Free State TB Coordinator); Dr Karin Weyer (Medical Research Council); Profs Herman Meulemans, Diana De Graeve, Luc Pauwels and Christiane Timmerman (University of Anwerp, Belgium); Dr Lara Fairall (UCT Lung Institute, University of Cape Town); Prof Frikkie Booysen (Department of Economics, University of the Free State); Christo Heunis, Ega Janse van Rensburg-Bonthuyzen, Zacheus Matebesi and Kobus Meyer (CHSR&D); Dr Mary Ednington (School of Public Health, Wits); Dr Carmen Báez and Sabine Verkuijl (ISDS); Anneke Van der Spoel-Van Dijk (Medical Microbiology, University of the Free State).

Costs

There will be no registration fees. However, delegates are expected to arrange their own transport and accommodation, or arrange for sponsorships themselves.

Contact details in case of inquiries and confirmation:

Postal Address: The Director, CHSR&D, PO Box 339, University of the Free State, Bloemfontein, 9300 Fax: 051 448 0370 Tel: 051 401 2181 OR 051 401 3256 E-mail: vrensh@mail.ufs.ac.za (Dingie van Rensburg) OR neljc@mail.ufs.ac.za (Ohna Nel)

PLEASE, CONFIRM YOUR ATTENDANCE AS SOON AS POSSIBLE, BUT AT THE LATEST BEFORE 25 OCTOBER 2003 ? BY TELEPHONE, FAX OR E-MAIL.

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