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Scientists from the University of Stellenbosch have teamed up with Danish biotechnology firm Aresa to test a genetically engineered tobacco plant that turns red when it grows near land mines, offering hope of a cheap way to help clear fields in post-conflict zones. [...] Field trials are already under way in Serbia, and researchers from Stellenbosch have applied to the registrar of the Genetically Modified Organisms Act for permission to conduct similar research. Scientists want to assess how the genetically engineered tobacco responds to drought and extreme temperatures, Kempen said.