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Nature Genetics 38, 63–67 (1 January 2006) | doi:10.1038/ng1694

A positive signal from the fertilization of the egg cell sets off endosperm proliferation in angiosperm embryogenesis

Moritz K Nowack , Paul E Grini , Marc J Jakoby , Marcel Lafos , Csaba Koncz & Arp Schnittger