Green revolution: a mutant gibberellin-synthesis gene in rice |
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Authors: | Sasaki A Ashikari M Ueguchi-Tanaka M Itoh H Nishimura A Swapan D Ishiyama K Saito T Kobayashi M Khush G S Kitano H Matsuoka M |
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Institution: | Bioscience Center, Nagoya University, Nagoya 464-8601, Japan. makoto@nuagr1.agr.nagoya-u.ac.jp |
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Abstract: | The chronic food shortage that was feared after the rapid expansion of the world population in the 1960s was averted largely by the development of a high-yielding semi-dwarf variety of rice known as IR8, the so-called rice 'green revolution'. The short stature of IR8 is due to a mutation in the plant's sd1 gene, and here we identify this gene as encoding an oxidase enzyme involved in the biosynthesis of gibberellin, a plant growth hormone. Gibberellin is also implicated in green-revolution varieties of wheat, but the reduced height of those crops is conferred by defects in the hormone's signalling pathway. |
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