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  Salty Rice Plant Boosts Harvests

  British scientists are breeding a new generation of rice plants that will be able to grow in soil containing salt water. Their work may enable abandoned farms to become productive once more.

  Tim Flowers and Tony Yeo, from Sussex Universitys School of Biological Sciences,have spent several years researching how crops, such as rice, could be made to grow in water that has become salty.

  The pair have recently begun a three-year programme, funded by the Biotechnology and Biological Sciences Research Council, to establish which genes enable some plants to survive salty conditions. The aim is to breed this capability into crops, starting with rice.

  It is estimated that each year more than 10m hectares of agricultural land are lost because salt gets into the soil and stunts plants. The problem is caused by several factors. In the tropics, mangroves that create swamps and traditionally formed barriers to sea water have been cut down. In the Mediterranean, a series of droughts have caused the water table to drop, allowing sea water to seep in. In Latin America, irrigation often causes problems when water is evaporated by the heat, leaving salt deposits behind.

  Excess salt then enters the plants and prevents them functioning normally. Heavy concentrations of minerals in the plants stop them drawing up the water they need to survive.

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