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Project description

Cell polarity and division orientation in development

Cells are organised along body and tissue axes in multicellular organisms. Only a few polarly localised proteins are known in plants, and molecular mechanisms of polarity establishment or division orientation are elusive. The EU-funded DIRNDL project capitalises on the previously developed Arabidopsis embryo model to study cell polarity and division orientation. Recent efforts identified a novel family of deeply conserved polar plant proteins that share a structural domain with key animal polarity regulators. The researchers will analyse the genetics and functions of the polar proteins and regulators in Arabidopsis and liverwort Marchantia to identify conserved components. The final goal is to establish a cell-based system for de novo polarity engineering, using the regulators identified in the project.

Objective

Cells in multicellular organisms organise along body and tissue axes. Cellular processes, such as division plane orientation, must be aligned with these polarity axes to generate functional 3-dimensional morphology, particularly in plants, where cell walls prevent cell migration. While some polarly localized plant proteins are known, molecular mechanisms of polarity establishment or its translation to division orientation are elusive, in part because regulators in animals and fungi appear to be missing from plant genomes. Cell polarity is first established in the embryo, but this has long been an intractable experimental model. My team has developed the genetic, cell biological and biochemical tools that now render the early Arabidopsis embryo an exquisite model for studying cell polarity and oriented division. Recent efforts already led to the unexpected identification of a novel family of deeply conserved polar plant proteins that share a structural domain with key animal polarity regulators. In the DIRNDL project, we will capitalize upon our unique position and foundational results, and use complementary approaches to discover the plant cell polarity and division orientation system. Firstly, we will address the function of the newly identified conserved polarity proteins, and determine mechanistic convergence of polarity regulators across multicellular kingdoms. Furthermore, we will use proteomic approaches to systematically identify polar proteins, and a genetic approach to identify regulators of polarity and division orientation, essential for embryogenesis. We will functionally analyse polar proteins and regulators both in Arabidopsis and the liverwort Marchantia to help prioritize conserved components, and to facilitate genetic analysis of protein function. Finally, we will use a cell-based system for engineering polarity de novo using the regulators identified in the project, and thus reveal the mechanisms that provide direction in plant development.

Fields of science (EuroSciVoc)

Keywords

Programme(s)

Topic(s)

Funding Scheme

ERC-ADG - Advanced Grant

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Call for proposal

(opens in new window) ERC-2018-ADG

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Host institution

WAGENINGEN UNIVERSITY
Net EU contribution
€ 2 500 000,00
Address
DROEVENDAALSESTEEG 4
6708 PB Wageningen
Netherlands
Region
Oost-Nederland Gelderland Veluwe
Activity type
Higher or Secondary Education Establishments
Links
Total cost
€ 2 500 000,00

Beneficiaries (1)