Africa: Tea Research Key to a Growing Industry

Pelly Malebe's research on helping plants withstand drought is personal as well as scientific. She grew up in South Africa's drought-prone northern province of Limpopo, where crop failures are frequent.
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If the affected crop is food for family consumption, the result can be hunger. If it is a crop for trade or export, the loss of earnings can also mean too little food on the family table, as well as threatening commercial farmers, both large and small.
As a doctoral student at the University of Pretoria, Malebe is studying the drought-survival mechanisms of tea plants under stress – and has identified a DNA marker for those plants more able to withstand drought. "This can be used to identify suitable drought-tolerant cultivars to benefit the commercial tea industry," she says.

In effect, Malebe has found a shortcut that suggests that a particular tea plant will tolerate drought conditions, without having to wait to see if and how the plant grows. Happily, the drought-tolerant plants can adapt to excess moisture, which means they can survive rainy weather as well.
RISE
Malebe's research is supported by RISE, the Regional Initiative in Science and Education, aimed at building capacity for science research and teaching in African universities. Funded by the Carnegie Corporation of New York, a charitable foundation, RISE works through a series of thematic networks, including Sabina, which stands for the Southern African Biochemistry and Informatics for Natural Products Network.
Sabina members include the Tea Research Foundation of Central Africa and the universities of Malawi, Namibia and Dar es Salaam [Tanzania], as well as South Africa's universities of the Witwatersrand and Pretoria. South Africa's Council for Scientific and Industrial Research also participates.
Biochemistry Professor Zeno Apostolides, founder of the University of Pretoria's Tea Research Laboratory, is a Sabina faculty advisor supervising three PhD students, including Malebe and fellow researcher Nicholas Mphangwe.
Plant breeder
Before he was accepted into the Sabina programme, Mphangwe had been working as a plant breeder for the Tea Research Foundation in his home country of Malawi, where tea provides about 30 percent of the country's foreign exchange and about five percent of the world's tea crop.
Since one of Rise's goals is to enhance scientific skills among scientists in mid-career, Mphangwe was able to take leave from his job to become part of the Sabina programme. In the lab, he is probing genetic markers to identify cultivars more adaptable to African growing conditions and more resistant to drought, insects, diseases and low temperatures.

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