The evolution and diversification of Dicers in plants |
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Authors: | Margis Rogerio Fusaro Adriana F Smith Neil A Curtin Shaun J Watson John M Finnegan E Jean Waterhouse Peter M |
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Institution: | CSIRO Plant Industry, P.O. Box 1600, Canberra, ACT 2601, Australia. |
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Abstract: | Most multicellular organisms regulate developmental transitions by microRNAs, which are generated by an enzyme, Dicer. Insects and fungi have two Dicer-like genes, and many animals have only one, yet the plant, Arabidopsis, has four. Examining the poplar and rice genomes revealed that they contain five and six Dicer-like genes, respectively. Analysis of these genes suggests that plants require a basic set of four Dicer types which were present before the divergence of mono- and dicotyledonous plants ( approximately 200 million years ago), but after the divergence of plants from green algae. A fifth type of Dicer seems to have evolved in monocots. |
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Keywords: | Dicer RNAi Evolution |
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