Plant cell differentiation - Which role for phosphoinositides?
Plant Vascular Development
A central question in plant development is how cells acquire their final fate. An extreme example of cell differentiation is the developmental program that shapes phloem cells as conductive elements. In order to become a long-distance network that distributes photoassimilates and growth regulators throughout the plant body, protophloem cells eliminate their nucleus and the majority of their organelles. Despite the importance of phloem function in plant fitness, very little is known about the underlying molecular mechanisms controlling its differentiation. Thus, our main interest is to identify new factors responsible for the subcellular events occurring during cell differentiation.We will start with the characterization of the new role of a group of lipid signaling compounds, the phosphoinositides (PIs), as phloem regulators. The function of the PIs at the subcellular level will be studied by using cell biology, biochemical and genetic approaches in root protophloem strands of Arabidopsis thaliana. We are particularly interested in building up a PI-related functional network with the aim of understanding not only how these compounds control protophoem differentiation but also how they modulate root architecture.
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- Perception of root-active CLE peptides requires CORYNE function in the phloem vasculature
Hazak, Ora; Brandt, Benjamin; Cattaneo, Pietro; Santiago, J; Rodriguez-Villalon, A; Hothorn, M; Hardtke, CS
EMBO REPORTS, 18 (8): 1367-1381 https://doi.org/10.15252/embr.201643535 AUG 2017
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- Plant Phosphoglycerolipids: The Gatekeepers of Vascular Cell Differentiation
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- Primary root protophloem differentiation requires balanced phosphatidylinositol-4,5-biphosphate levels and systemically affects root branching
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DEVELOPMENT, 142 (8): 1437-1446 APR 15 2015
- Molecular genetic framework for protophloem formation
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PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
111(31): 11551-11556 10.1073/pnas.1407337111 2014