Embryogenesis of flowering plants is initiated by polarization of the zygote, a prerequisite for correct axis formation in the embryo. Zygote polarity and the decision between embryonic and non-embryonic development in the daughter cells is controlled by a MITOGEN-ACTIVATING PROTEIN (MAP) kinase signaling pathway including the MAPKK kinase YODA (YDA). Upstream of YDA act two members of the BRASINOSTEROID SIGNALING KINASE (BSK) family, BSK1 and BSK2. These membrane-associated proteins serve as signaling relay linking receptor kinase complexes with intracellular signaling cascades. The receptor kinases acting upstream of BSK1 and BSK2 in the zygote, however, have so far not been identified. Instead, YDA can in part be activated by the non-canonical BSK family member SHORT SUSPENSOR (SSP) that is contributed by the sperm cell during fertilization. Here, we show that the receptor kinase ERECTA plays a crucial role in zygote polarization as maternally contributed part of the embryonic YDA pathway. SSP on the other hand provides an independent, paternal input to YDA activation, outlining a Y-shaped pathway. We conclude that two independent parental contributions initiate zygote polarization and control suspensor formation and embryonic development.
- Downloaded 380 times
- Download rankings, all-time:
- Site-wide: 88,413
- In plant biology: 2,326
- Year to date:
- Site-wide: 52,945
- Since beginning of last month:
- Site-wide: 52,945
Downloads over time
Distribution of downloads per paper, site-wide
- 27 Nov 2020: The website and API now include results pulled from medRxiv as well as bioRxiv.
- 18 Dec 2019: We're pleased to announce PanLingua, a new tool that enables you to search for machine-translated bioRxiv preprints using more than 100 different languages.
- 21 May 2019: PLOS Biology has published a community page about Rxivist.org and its design.
- 10 May 2019: The paper analyzing the Rxivist dataset has been published at eLife.
- 1 Mar 2019: We now have summary statistics about bioRxiv downloads and submissions.
- 8 Feb 2019: Data from Altmetric is now available on the Rxivist details page for every preprint. Look for the "donut" under the download metrics.
- 30 Jan 2019: preLights has featured the Rxivist preprint and written about our findings.
- 22 Jan 2019: Nature just published an article about Rxivist and our data.
- 13 Jan 2019: The Rxivist preprint is live!