Bypassing genomic imprinting allows seed development

Moritz K. Nowack, Reza Shirzadi, Nico Dissmeyer, Andreas Dolf, Elmar Endl, Paul E. Grini and Arp Schnittger ()
Additional contact information
Moritz K. Nowack: University group at the Max Planck Institute for Plant Breeding Research, Max-Delbrück-Laboratorium, University of Cologne, Carl-von-Linné-Weg 10, D-50829 Cologne, Germany
Reza Shirzadi: University of Oslo, PO Box 1041 Blindern, N-0316 Oslo, Norway
Nico Dissmeyer: University group at the Max Planck Institute for Plant Breeding Research, Max-Delbrück-Laboratorium, University of Cologne, Carl-von-Linné-Weg 10, D-50829 Cologne, Germany
Andreas Dolf: Institute of Molecular Medicine and Experimental Immunology, Sigmund-Freud-Straβe 25, D-53105 Bonn, Germany
Elmar Endl: Institute of Molecular Medicine and Experimental Immunology, Sigmund-Freud-Straβe 25, D-53105 Bonn, Germany
Paul E. Grini: University of Oslo, PO Box 1041 Blindern, N-0316 Oslo, Norway
Arp Schnittger: University group at the Max Planck Institute for Plant Breeding Research, Max-Delbrück-Laboratorium, University of Cologne, Carl-von-Linné-Weg 10, D-50829 Cologne, Germany

Nature, 2007, vol. 447, issue 7142, 312-315

Abstract: The seeds of success One factor in the success of the flowering plants (angiosperms) may be the development of the embryo along with a second fertilization product, the endosperm. Two rival explanations for the evolutionary origin of the endosperm were proposed over a century ago, and have since divided the field of plant development. Nowack et al. present new evidence that favours one of the hypotheses, that of eminent botanist Eduard Strasburger. Seeds from an Arabidopsis mutant containing a maternally derived diploid endosperm, instead of a biparental triploid endosperm, are found able to develop into viable plants. This argues for female reproductive structures as the source for the endosperm, and against a requirement for genomic imprinting, where an allele is expressed dependent on which parent contributes it.

Date: 2007
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DOI: 10.1038/nature05770

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