Plant biotechnology developed rapidly, but resulted in extensive discussion of biosafety. The safety of food from transgenic plant and the effect of transgenic plant on ecological systems were the main topics. The impact of transgenic food consists of hypersensitivity and toxicity of crops produced by biotechnology and the safety of antibiotic marker gene. Ecological safety of transgenic plant was concerned in gene drifting, and the resistance of insects to Bt insecticide and the influence on biodiversity. These topics are briefly reviewed in this paper.
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