Masters of symmetry

 作者:米懈原     |      日期:2019-03-07 02:20:08
BOTANISTS studying mutant snapdragon plants have found a master gene that normally makes leaves and petals asymmetrical. The same gene may control symmetry in other plants, such as the begonia. Enrico Coen and his colleagues at the John Innes Centre in Norwich, Norfolk, found that the normal gene—dubbed dichotoma—causes asymmetry in snapdragon petals. In mutant snapdragons lacking a functional dichotoma gene, the petals were symmetrical. “In plants, it’s the first known gene controlling organ symmetry,” says Coen, whose results appear in Cell (vol 99,