胚胎来源肽信号引导拟南芥胚乳极性建立

Audrey Creff1†, Jack Rhodes2†, Camille Salaün3, Julien Larive1, Vincent Bayle1, Maialen Garmendia-Calvo2, Emma Turley2‡, Tatsuya Nobori2, Duarte D. Figueiredo3, Benoit Landrein1, Cyril Zipfel2,4*, Gwyneth Ingram1* Angiosperm seed formation requires the coordinated development of the products of double fertilization—the embryo and the endosperm. The endosperm mediates efficient nutrient transfer from surrounding maternal tissues to the developing embryo. This function requires a polarized tissue organization, which manifests as early polar gene expression and polar cellularization dynamics. We show that the receptor kinase HAIKU2 (IKU2) acts in coordination with the transcription factor WRKY10/MINISEED3 (MINI3) to ensure robust endosperm polarity establishment through the activity of the homeodomain transcription factors WUSCHEL-RELATED HOMEOBOX 8 (WOX8) and WOX9. …