Micronutrient uptake and accumulation traits are inherited. Two distinct biotechnological techniques could be used to improve the micronutrient acquisition in crops. One is the use of DNA molecular markers (RFLP, RAPD) as genetic tags for the trait in plant breeding programmes and the second is the introduction of defined genetic material through transgenic technology. In this reviews, we will summarize current knowledge about genes whose products function in uptake, transport and accumulation of micronutrients such as iron, zinc, manganese and copper in plants. Several genes have been identified on the basis of function, via complementation of yeast mutants, or on the basis of sequence similarity, via databases analysis, degenerate PCR. The recent progress in the area of recombinant DNA technologies, is likely to provide us an option to improve micronutrient acquisition.
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