<http://biology.plosjournals.org/perlserv/?request=get-document&doi=10.1371/journal.pbio.0060308> *The Maternally Expressed WRKY Transcription Factor /TTG2/ Controls Lethality in Interploidy Crosses of /Arabidopsis/* Brian P. Dilkes, Melissa Spielman, Renate Weizbauer, Brian Watson, Diana Burkart-Waco, Rod J. Scott, and Luca Comai Hybrid lethality in crosses between diploids and tetraploids, plants with whole genome duplication, is determined by an epidermal regulator expressed in the maternal tissue that envelops the seed. Full-text <http://biology.plosjournals.org/perlserv/?request=get-document&doi=10.1371/journal.pbio.0060308> | Author Summary <http://biology.plosjournals.org/perlserv/?request=get-document&doi=10.1371/journal.pbio.0060308#special> | Screen PDF (768K) <http://biology.plosjournals.org/perlserv/?request=get-pdf&file=10.1371_journal.pbio.0060308-S.pdf>