1
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Gully K, Berhin A, De Bellis D, Herrfurth C, Feussner I, Nawrath C. The GPAT4/ 6/ 8 clade functions in Arabidopsis root suberization nonredundantly with the GPAT5/7 clade required for suberin lamellae. Proc Natl Acad Sci U S A 2024; 121:e2314570121. [PMID: 38739804 DOI: 10.1073/pnas.2314570121] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2023] [Accepted: 03/28/2024] [Indexed: 05/16/2024] Open
Abstract
Lipid polymers such as cutin and suberin strengthen the diffusion barrier properties of the cell wall in specific cell types and are essential for water relations, mineral nutrition, and stress protection in plants. Land plant-specific glycerol-3-phosphate acyltransferases (GPATs) of different clades are central players in cutin and suberin monomer biosynthesis. Here, we show that the GPAT4/6/8 clade in Arabidopsis thaliana, which is known to mediate cutin formation, is also required for developmentally regulated root suberization, in addition to the established roles of GPAT5/7 in suberization. The GPAT5/7 clade is mainly required for abscisic acid-regulated suberization. In addition, the GPAT5/7 clade is crucial for the formation of the typical lamellated suberin ultrastructure observed by transmission electron microscopy, as distinct amorphous globular polyester structures were deposited in the apoplast of the gpat5 gpat7 double mutant, in contrast to the thinner but still lamellated suberin deposition in the gpat4 gpat6 gpat8 triple mutant. Site-directed mutagenesis revealed that the intrinsic phosphatase activity of GPAT4, GPAT6, and GPAT8, which leads to monoacylglycerol biosynthesis, contributes to suberin formation. GPAT5/7 lack an active phosphatase domain and the amorphous globular polyester structure observed in the gpat5 gpat7 double mutant was partially reverted by treatment with a phosphatase inhibitor or the expression of phosphatase-dead variants of GPAT4/6/8. Thus, GPATs that lack an active phosphatase domain synthetize lysophosphatidic acids that might play a role in the formation of the lamellated structure of suberin. GPATs with active and nonactive phosphatase domains appear to have nonredundant functions and must cooperate to achieve the efficient biosynthesis of correctly structured suberin.
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Affiliation(s)
- Kay Gully
- Department of Plant Molecular Biology, University of Lausanne, Lausanne CH-1015, Switzerland
| | - Alice Berhin
- Department of Plant Molecular Biology, University of Lausanne, Lausanne CH-1015, Switzerland
| | - Damien De Bellis
- Department of Plant Molecular Biology, University of Lausanne, Lausanne CH-1015, Switzerland
- Electron Microscopy Facility, University of Lausanne, Lausanne CH-1015, Switzerland
| | - Cornelia Herrfurth
- Department of Plant Biochemistry, Albrecht-von-Haller-Institute of Plant Sciences, University of Goettingen, Goettingen D-37077, Germany
- Service Unit for Metabolomics and Lipidomics, Goettingen Center for Molecular Biosciences, University of Goettingen, Goettingen D-37077, Germany
| | - Ivo Feussner
- Department of Plant Biochemistry, Albrecht-von-Haller-Institute of Plant Sciences, University of Goettingen, Goettingen D-37077, Germany
- Service Unit for Metabolomics and Lipidomics, Goettingen Center for Molecular Biosciences, University of Goettingen, Goettingen D-37077, Germany
- Department of Plant Biochemistry, Goettingen Center for Molecular Biosciences, University of Goettingen, Goettingen D-37077, Germany
| | - Christiane Nawrath
- Department of Plant Molecular Biology, University of Lausanne, Lausanne CH-1015, Switzerland
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2
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Cantó-Pastor A, Kajala K, Shaar-Moshe L, Manzano C, Timilsena P, De Bellis D, Gray S, Holbein J, Yang H, Mohammad S, Nirmal N, Suresh K, Ursache R, Mason GA, Gouran M, West DA, Borowsky AT, Shackel KA, Sinha N, Bailey-Serres J, Geldner N, Li S, Franke RB, Brady SM. A suberized exodermis is required for tomato drought tolerance. Nat Plants 2024; 10:118-130. [PMID: 38168610 PMCID: PMC10808073 DOI: 10.1038/s41477-023-01567-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/31/2023] [Accepted: 10/23/2023] [Indexed: 01/05/2024]
Abstract
Plant roots integrate environmental signals with development using exquisite spatiotemporal control. This is apparent in the deposition of suberin, an apoplastic diffusion barrier, which regulates flow of water, solutes and gases, and is environmentally plastic. Suberin is considered a hallmark of endodermal differentiation but is absent in the tomato endodermis. Instead, suberin is present in the exodermis, a cell type that is absent in the model organism Arabidopsis thaliana. Here we demonstrate that the suberin regulatory network has the same parts driving suberin production in the tomato exodermis and the Arabidopsis endodermis. Despite this co-option of network components, the network has undergone rewiring to drive distinct spatial expression and with distinct contributions of specific genes. Functional genetic analyses of the tomato MYB92 transcription factor and ASFT enzyme demonstrate the importance of exodermal suberin for a plant water-deficit response and that the exodermal barrier serves an equivalent function to that of the endodermis and can act in its place.
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Affiliation(s)
- Alex Cantó-Pastor
- Department of Plant Biology and Genome Center, University of California, Davis, Davis, CA, USA
| | - Kaisa Kajala
- Department of Plant Biology and Genome Center, University of California, Davis, Davis, CA, USA
- Plant-Environment Signaling, Institute of Environmental Biology, Utrecht University, Utrecht, the Netherlands
| | - Lidor Shaar-Moshe
- Department of Plant Biology and Genome Center, University of California, Davis, Davis, CA, USA
- Department of Evolutionary and Environmental Biology, Faculty of Natural Sciences, Institute of Evolution, University of Haifa, Haifa, Israel
| | - Concepción Manzano
- Department of Plant Biology and Genome Center, University of California, Davis, Davis, CA, USA
| | - Prakash Timilsena
- School of Plant and Environmental Sciences, Virginia Tech, Blacksburg, VA, USA
| | - Damien De Bellis
- Department of Plant Molecular Biology, University of Lausanne, Lausanne, Switzerland
- Electron Microscopy Facility, University of Lausanne, Lausanne, Switzerland
| | - Sharon Gray
- Department of Plant Biology and Genome Center, University of California, Davis, Davis, CA, USA
| | - Julia Holbein
- Institute of Cellular and Molecular Botany, Rheinische Friedrich-Wilhelms-University of Bonn, Bonn, Germany
| | - He Yang
- Department of Plant Biology and Genome Center, University of California, Davis, Davis, CA, USA
| | - Sana Mohammad
- Department of Plant Biology and Genome Center, University of California, Davis, Davis, CA, USA
| | - Niba Nirmal
- Department of Plant Biology and Genome Center, University of California, Davis, Davis, CA, USA
| | - Kiran Suresh
- Institute of Cellular and Molecular Botany, Rheinische Friedrich-Wilhelms-University of Bonn, Bonn, Germany
| | - Robertas Ursache
- Department of Plant Molecular Biology, University of Lausanne, Lausanne, Switzerland
| | - G Alex Mason
- Department of Plant Biology and Genome Center, University of California, Davis, Davis, CA, USA
| | - Mona Gouran
- Department of Plant Biology and Genome Center, University of California, Davis, Davis, CA, USA
| | - Donnelly A West
- Department of Plant Biology, University of California, Davis, Davis, CA, USA
| | - Alexander T Borowsky
- Center for Plant Cell Biology, Department of Botany and Plant Sciences, University of California, Riverside, Riverside, CA, USA
| | - Kenneth A Shackel
- Department of Plant Sciences, University of California, Davis, Davis, CA, USA
| | - Neelima Sinha
- Department of Plant Biology, University of California, Davis, Davis, CA, USA
| | - Julia Bailey-Serres
- Center for Plant Cell Biology, Department of Botany and Plant Sciences, University of California, Riverside, Riverside, CA, USA
| | - Niko Geldner
- Department of Plant Molecular Biology, University of Lausanne, Lausanne, Switzerland
| | - Song Li
- School of Plant and Environmental Sciences, Virginia Tech, Blacksburg, VA, USA
| | - Rochus Benni Franke
- Institute of Cellular and Molecular Botany, Rheinische Friedrich-Wilhelms-University of Bonn, Bonn, Germany
| | - Siobhan M Brady
- Department of Plant Biology and Genome Center, University of California, Davis, Davis, CA, USA.
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3
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Nawkar GM, Legris M, Goyal A, Schmid-Siegert E, Fleury J, Mucciolo A, De Bellis D, Trevisan M, Schueler A, Fankhauser C. Air channels create a directional light signal to regulate hypocotyl phototropism. Science 2023; 382:935-940. [PMID: 37995216 DOI: 10.1126/science.adh9384] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2023] [Accepted: 10/04/2023] [Indexed: 11/25/2023]
Abstract
In plants, light direction is perceived by the phototropin photoreceptors, which trigger directional growth responses known as phototropism. The formation of a phototropin activation gradient across a photosensitive organ initiates this response. However, the optical tissue properties that functionally contribute to phototropism remain unclear. In this work, we show that intercellular air channels limit light transmittance through various organs in several species. Air channels enhance light scattering in Arabidopsis hypocotyls, thereby steepening the light gradient. This is required for an efficient phototropic response in Arabidopsis and Brassica. We identified an embryonically expressed ABC transporter required for the presence of air channels in seedlings and a structure surrounding them. Our work provides insights into intercellular air space development or maintenance and identifies a mechanism of directional light sensing in plants.
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Affiliation(s)
- Ganesh M Nawkar
- Centre for Integrative Genomics, Faculty of Biology and Medicine, Génopode Building, University of Lausanne, 1015 Lausanne, Switzerland
| | - Martina Legris
- Centre for Integrative Genomics, Faculty of Biology and Medicine, Génopode Building, University of Lausanne, 1015 Lausanne, Switzerland
| | - Anupama Goyal
- Centre for Integrative Genomics, Faculty of Biology and Medicine, Génopode Building, University of Lausanne, 1015 Lausanne, Switzerland
| | - Emanuel Schmid-Siegert
- SIB, Swiss Institute for Bioinformatics, University of Lausanne, 1015 Lausanne, Switzerland
| | - Jérémy Fleury
- EPFL Renewable Energies Cluster ENAC, 1015 Lausanne, Switzerland
| | - Antonio Mucciolo
- Electron Microscopy Facility, EMF, Faculty of Biology and Medicine, Biophore Building, University of Lausanne, 1015 Lausanne, Switzerland
| | - Damien De Bellis
- Electron Microscopy Facility, EMF, Faculty of Biology and Medicine, Biophore Building, University of Lausanne, 1015 Lausanne, Switzerland
- Department of Plant Molecular Biology, Faculty of Biology and Medicine, Biophore Building University of Lausanne, 1015 Lausanne, Switzerland
| | - Martine Trevisan
- Centre for Integrative Genomics, Faculty of Biology and Medicine, Génopode Building, University of Lausanne, 1015 Lausanne, Switzerland
| | - Andreas Schueler
- EPFL Renewable Energies Cluster ENAC, 1015 Lausanne, Switzerland
| | - Christian Fankhauser
- Centre for Integrative Genomics, Faculty of Biology and Medicine, Génopode Building, University of Lausanne, 1015 Lausanne, Switzerland
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4
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Moussu S, Lee HK, Haas KT, Broyart C, Rathgeb U, De Bellis D, Levasseur T, Schoenaers S, Fernandez GS, Grossniklaus U, Bonnin E, Hosy E, Vissenberg K, Geldner N, Cathala B, Höfte H, Santiago J. Plant cell wall patterning and expansion mediated by protein-peptide-polysaccharide interaction. Science 2023; 382:719-725. [PMID: 37943924 DOI: 10.1126/science.adi4720] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2023] [Accepted: 09/22/2023] [Indexed: 11/12/2023]
Abstract
Assembly of cell wall polysaccharides into specific patterns is required for plant growth. A complex of RAPID ALKALINIZATION FACTOR 4 (RALF4) and its cell wall-anchored LEUCINE-RICH REPEAT EXTENSIN 8 (LRX8)-interacting protein is crucial for cell wall integrity during pollen tube growth, but its molecular connection with the cell wall is unknown. Here, we show that LRX8-RALF4 complexes adopt a heterotetrametric configuration in vivo, displaying a dendritic distribution. The LRX8-RALF4 complex specifically interacts with demethylesterified pectins in a charge-dependent manner through RALF4's polycationic surface. The LRX8-RALF4-pectin interaction exerts a condensing effect, patterning the cell wall's polymers into a reticulated network essential for wall integrity and expansion. Our work uncovers a dual structural and signaling role for RALF4 in pollen tube growth and in the assembly of complex extracellular polymers.
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Affiliation(s)
- Steven Moussu
- The Plant Signaling Mechanisms Laboratory, Department of Plant Molecular Biology, University of Lausanne, 1015 Lausanne, Switzerland
| | - Hyun Kyung Lee
- The Plant Signaling Mechanisms Laboratory, Department of Plant Molecular Biology, University of Lausanne, 1015 Lausanne, Switzerland
| | - Kalina T Haas
- Université Paris-Saclay, INRAE, AgroParisTech, Institut Jean-Pierre Bourgin (IJPB), 78000 Versailles, France
| | - Caroline Broyart
- The Plant Signaling Mechanisms Laboratory, Department of Plant Molecular Biology, University of Lausanne, 1015 Lausanne, Switzerland
| | - Ursina Rathgeb
- Department of Plant Molecular Biology, University of Lausanne, 1015 Lausanne, Switzerland
| | - Damien De Bellis
- Department of Plant Molecular Biology, University of Lausanne, 1015 Lausanne, Switzerland
- Electron Microscopy Facility, University of Lausanne, 1015 Lausanne, Switzerland
| | | | - Sébastjen Schoenaers
- Université Paris-Saclay, INRAE, AgroParisTech, Institut Jean-Pierre Bourgin (IJPB), 78000 Versailles, France
- Integrated Molecular Plant Physiology Research (IMPRES), Department of Biology, University of Antwerp, 2020 Antwerp, Belgium
| | - Gorka S Fernandez
- Department of Plant and Microbial Biology & Zurich-Basel Plant Science Center, University of Zurich, 8008 Zurich, Switzerland
| | - Ueli Grossniklaus
- Department of Plant and Microbial Biology & Zurich-Basel Plant Science Center, University of Zurich, 8008 Zurich, Switzerland
| | | | - Eric Hosy
- IINS, CNRS UMR5297, University of Bordeaux, 33000 Bordeaux, France
| | - Kris Vissenberg
- Integrated Molecular Plant Physiology Research (IMPRES), Department of Biology, University of Antwerp, 2020 Antwerp, Belgium
- Plant Biochemistry & Biotechnology Lab, Department of Agriculture, Hellenic Mediterranean University, Stavromenos PC 71410, Heraklion, Crete, Greece
| | - Niko Geldner
- Department of Plant Molecular Biology, University of Lausanne, 1015 Lausanne, Switzerland
| | | | - Herman Höfte
- Université Paris-Saclay, INRAE, AgroParisTech, Institut Jean-Pierre Bourgin (IJPB), 78000 Versailles, France
| | - Julia Santiago
- The Plant Signaling Mechanisms Laboratory, Department of Plant Molecular Biology, University of Lausanne, 1015 Lausanne, Switzerland
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5
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Meibom A, Plane F, Cheng T, Grandjean G, Haldimann O, Escrig S, Jensen L, Daraspe J, Mucciolo A, De Bellis D, Rädecker N, Martin-Olmos C, Genoud C, Comment A. Correlated cryo-SEM and CryoNanoSIMS imaging of biological tissue. BMC Biol 2023; 21:126. [PMID: 37280616 DOI: 10.1186/s12915-023-01623-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2022] [Accepted: 05/10/2023] [Indexed: 06/08/2023] Open
Abstract
BACKGROUND The development of nanoscale secondary ion mass spectrometry (NanoSIMS) has revolutionized the study of biological tissues by enabling, e.g., the visualization and quantification of metabolic processes at subcellular length scales. However, the associated sample preparation methods all result in some degree of tissue morphology distortion and loss of soluble compounds. To overcome these limitations an entirely cryogenic sample preparation and imaging workflow is required. RESULTS Here, we report the development of a CryoNanoSIMS instrument that can perform isotope imaging of both positive and negative secondary ions from flat block-face surfaces of vitrified biological tissues with a mass- and image resolution comparable to that of a conventional NanoSIMS. This capability is illustrated with nitrogen isotope as well as trace element mapping of freshwater hydrozoan Green Hydra tissue following uptake of 15N-enriched ammonium. CONCLUSION With a cryo-workflow that includes vitrification by high pressure freezing, cryo-planing of the sample surface, and cryo-SEM imaging, the CryoNanoSIMS enables correlative ultrastructure and isotopic or elemental imaging of biological tissues in their most pristine post-mortem state. This opens new horizons in the study of fundamental processes at the tissue- and (sub)cellular level. TEASER CryoNanoSIMS: subcellular mapping of chemical and isotopic compositions of biological tissues in their most pristine post-mortem state.
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Affiliation(s)
- Anders Meibom
- Laboratory for Biological Geochemistry, School of Architecture, Civil and Environmental Engineering, École Polytechnique Fédérale de Lausanne (EPFL), Lausanne, CH-1015, Switzerland.
- Center for Advanced Surface Analysis, Institute of Earth Sciences, University of Lausanne, Lausanne, CH-1015, Switzerland.
| | - Florent Plane
- Laboratory for Biological Geochemistry, School of Architecture, Civil and Environmental Engineering, École Polytechnique Fédérale de Lausanne (EPFL), Lausanne, CH-1015, Switzerland
- Center for Advanced Surface Analysis, Institute of Earth Sciences, University of Lausanne, Lausanne, CH-1015, Switzerland
| | - Tian Cheng
- Laboratory for Biological Geochemistry, School of Architecture, Civil and Environmental Engineering, École Polytechnique Fédérale de Lausanne (EPFL), Lausanne, CH-1015, Switzerland
| | - Gilles Grandjean
- Mechanical Workshop, School of Basic Sciences, École Polytechnique Fédérale de Lausanne, Lausanne, CH-1015, Switzerland
| | - Olivier Haldimann
- Mechanical Workshop, School of Basic Sciences, École Polytechnique Fédérale de Lausanne, Lausanne, CH-1015, Switzerland
| | - Stephane Escrig
- Laboratory for Biological Geochemistry, School of Architecture, Civil and Environmental Engineering, École Polytechnique Fédérale de Lausanne (EPFL), Lausanne, CH-1015, Switzerland
| | - Louise Jensen
- Laboratory for Biological Geochemistry, School of Architecture, Civil and Environmental Engineering, École Polytechnique Fédérale de Lausanne (EPFL), Lausanne, CH-1015, Switzerland
| | - Jean Daraspe
- Electron Microscopy Facility, University of Lausanne, Lausanne, CH-1015, Switzerland
| | - Antonio Mucciolo
- Electron Microscopy Facility, University of Lausanne, Lausanne, CH-1015, Switzerland
| | - Damien De Bellis
- Electron Microscopy Facility, University of Lausanne, Lausanne, CH-1015, Switzerland
| | - Nils Rädecker
- Laboratory for Biological Geochemistry, School of Architecture, Civil and Environmental Engineering, École Polytechnique Fédérale de Lausanne (EPFL), Lausanne, CH-1015, Switzerland
| | - Cristina Martin-Olmos
- Laboratory for Biological Geochemistry, School of Architecture, Civil and Environmental Engineering, École Polytechnique Fédérale de Lausanne (EPFL), Lausanne, CH-1015, Switzerland
- Center for Advanced Surface Analysis, Institute of Earth Sciences, University of Lausanne, Lausanne, CH-1015, Switzerland
| | - Christel Genoud
- Electron Microscopy Facility, University of Lausanne, Lausanne, CH-1015, Switzerland
| | - Arnaud Comment
- Institute of Physics, School of Basic Sciences, École Polytechnique Fédérale de Lausanne, Lausanne, CH-1015, Switzerland
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6
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Barbosa ICR, De Bellis D, Flückiger I, Bellani E, Grangé-Guerment M, Hématy K, Geldner N. Directed growth and fusion of membrane-wall microdomains requires CASP-mediated inhibition and displacement of secretory foci. Nat Commun 2023; 14:1626. [PMID: 36959183 PMCID: PMC10036488 DOI: 10.1038/s41467-023-37265-7] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2022] [Accepted: 03/07/2023] [Indexed: 03/25/2023] Open
Abstract
Casparian strips (CS) are aligned bands of lignin-impregnated cell walls, building an extracellular diffusion barrier in roots. Their structure profoundly differs from tight junctions (TJ), analogous structures in animals. Nonetheless, CS membrane domain (CSD) proteins 1-5 (CASP1-5) are homologues of occludins, TJ components. CASP-marked membranes display cell wall (matrix) adhesion and membrane protein exclusion. A full CASP knock-out now reveals CASPs are not needed for localized lignification, since correctly positioned lignin microdomains still form in the mutant. Ultra-structurally, however, these microdomains are disorganized, showing excessive cell wall growth, lack of exclusion zone and matrix adhesion, and impaired exocyst dynamics. Proximity-labelling identifies a Rab-GTPase subfamily, known exocyst activators, as potential CASP-interactors and demonstrate their localization and function at the CSD. We propose that CASP microdomains displace initial secretory foci by excluding vesicle tethering factors, thereby ensuring rapid fusion of microdomains into a membrane-cell wall band that seals the extracellular space.
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Affiliation(s)
- Inês Catarina Ramos Barbosa
- Department of Plant Molecular Biology, Faculty of Biology and Medicine, University of Lausanne, 1015, Lausanne, Switzerland.
| | - Damien De Bellis
- Department of Plant Molecular Biology, Faculty of Biology and Medicine, University of Lausanne, 1015, Lausanne, Switzerland
| | - Isabelle Flückiger
- Department of Plant Molecular Biology, Faculty of Biology and Medicine, University of Lausanne, 1015, Lausanne, Switzerland
| | - Etienne Bellani
- Department of Plant Molecular Biology, Faculty of Biology and Medicine, University of Lausanne, 1015, Lausanne, Switzerland
| | - Mathieu Grangé-Guerment
- Department of Plant Molecular Biology, Faculty of Biology and Medicine, University of Lausanne, 1015, Lausanne, Switzerland
| | - Kian Hématy
- Department of Plant Molecular Biology, Faculty of Biology and Medicine, University of Lausanne, 1015, Lausanne, Switzerland
- Institut Jean-Pierre Bourgin, INRAe, AgroParisTech, Université Paris-Saclay, 78000, Versailles, France
| | - Niko Geldner
- Department of Plant Molecular Biology, Faculty of Biology and Medicine, University of Lausanne, 1015, Lausanne, Switzerland.
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7
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Hématy K, De Bellis D, Wang X, Mähönen AP, Geldner N. Analysis of exocyst function in endodermis reveals its widespread contribution and specificity of action. Plant Physiol 2022; 189:557-566. [PMID: 35099565 PMCID: PMC9157074 DOI: 10.1093/plphys/kiac019] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/02/2021] [Accepted: 12/07/2021] [Indexed: 06/14/2023]
Abstract
The exocyst is the main plasma membrane vesicle-tethering complex in eukaryotes and is composed of eight different subunits. Yet, in plant genomes, many subunits display multiple copies, thought to reflect evolution of complex subtypes with divergent functions. In Arabidopsis thaliana root endodermal cells, the isoform EXO70A1 is required for positioning of CASP1 at the Casparian Strip Domain, but not for its non-targeted secretion to the plasma membrane. Here, we show that exo84b resembles exo70a1 mutants regarding CASP1 mistargeting and secretion of apoplastic proteins, but exo84b additionally affects secretion of other integral plasma membrane proteins. Moreover, conditional, cell-type-specific gene editing of the single-copy core component SEC6 allows visualization of secretion defects in plant cells with a complete lack of exocyst complex function. Our approach opens avenues for deciphering the complexity/diversity of exocyst functions in plant cells and enables analysis of central trafficking components with lethal phenotypes.
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Affiliation(s)
- Kian Hématy
- Department of Plant Molecular Biology, University of Lausanne, Lausanne 1015, Switzerland
- Institut Jean-Pierre Bourgin, INRAe, AgroParisTech, Université Paris-Saclay, 78000 Versailles, France
| | - Damien De Bellis
- Department of Plant Molecular Biology, University of Lausanne, Lausanne 1015, Switzerland
- Electron Microscopy Facility, University of Lausanne, Lausanne 1015, Switzerland
| | - Xin Wang
- Institute of Biotechnology, HiLIFE, University of Helsinki, Helsinki 00014, Finland
- Faculty of Biological and Environmental Sciences and Viikki Plant Science Centre, Organismal and Evolutionary Biology Research Programme, University of Helsinki, Helsinki 00014, Finland
| | - Ari Pekka Mähönen
- Institute of Biotechnology, HiLIFE, University of Helsinki, Helsinki 00014, Finland
- Faculty of Biological and Environmental Sciences and Viikki Plant Science Centre, Organismal and Evolutionary Biology Research Programme, University of Helsinki, Helsinki 00014, Finland
| | - Niko Geldner
- Department of Plant Molecular Biology, University of Lausanne, Lausanne 1015, Switzerland
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8
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De Bellis D, Kalmbach L, Marhavy P, Daraspe J, Geldner N, Barberon M. Extracellular vesiculo-tubular structures associated with suberin deposition in plant cell walls. Nat Commun 2022; 13:1489. [PMID: 35304458 PMCID: PMC8933581 DOI: 10.1038/s41467-022-29110-0] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2021] [Accepted: 02/25/2022] [Indexed: 12/21/2022] Open
Abstract
Suberin is a fundamental plant biopolymer, found in protective tissues, such as seed coats, exodermis and endodermis of roots. Suberin is deposited in most suberizing cells in the form of lamellae just outside of the plasma membrane, below the primary cell wall. How monomeric suberin precursors, thought to be synthesized at the endoplasmic reticulum, are transported outside of the cell, for polymerization into suberin lamellae has remained obscure. Using electron-microscopy, we observed large numbers of extracellular vesiculo-tubular structures (EVs) to accumulate specifically in suberizing cells, in both chemically and cryo-fixed samples. EV presence correlates perfectly with root suberization and we could block suberin deposition and vesicle accumulation by affecting early, as well as late steps in the secretory pathway. Whereas many previous reports have described EVs in the context of biotic interactions, our results suggest a developmental role for extracellular vesicles in the formation of a major cell wall polymer. Suberizing plant cells export suberin monomers outside of the cell to form a hydrophobic barrier. Here the authors propose a role for extracellular vesiculo-tubular structures in the deposition of suberin monomers.
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Affiliation(s)
- Damien De Bellis
- Department of Plant Molecular Biology, DBMV, UNIL-Sorge, University of Lausanne, 1015, Lausanne, Switzerland.,Electron Microscopy Facility, University of Lausanne, 1015, Lausanne, Switzerland
| | - Lothar Kalmbach
- Department of Plant Molecular Biology, DBMV, UNIL-Sorge, University of Lausanne, 1015, Lausanne, Switzerland.,Sainsbury Laboratory University Cambridge, CB2 1LR, Cambridge, United Kingdom
| | - Peter Marhavy
- Department of Plant Molecular Biology, DBMV, UNIL-Sorge, University of Lausanne, 1015, Lausanne, Switzerland.,Department of Forest Genetics and Plant Physiology, 90736, Umeå, Sweden
| | - Jean Daraspe
- Electron Microscopy Facility, University of Lausanne, 1015, Lausanne, Switzerland
| | - Niko Geldner
- Department of Plant Molecular Biology, DBMV, UNIL-Sorge, University of Lausanne, 1015, Lausanne, Switzerland.
| | - Marie Barberon
- Department of Plant Molecular Biology, DBMV, UNIL-Sorge, University of Lausanne, 1015, Lausanne, Switzerland. .,Department of Botany and Plant Biology, University of Geneva, 1211, Geneva, Switzerland.
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9
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Kolbeck A, Marhavý P, De Bellis D, Li B, Kamiya T, Fujiwara T, Kalmbach L, Geldner N. CASP microdomain formation requires cross cell wall stabilization of domains and non-cell autonomous action of LOTR1. eLife 2022; 11:69602. [PMID: 35029147 PMCID: PMC8794472 DOI: 10.7554/elife.69602] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2021] [Accepted: 01/13/2022] [Indexed: 11/24/2022] Open
Abstract
Efficient uptake of nutrients in both animal and plant cells requires tissue-spanning diffusion barriers separating inner tissues from the outer lumen/soil. However, we poorly understand how such contiguous three-dimensional superstructures are formed in plants. Here, we show that correct establishment of the plant Casparian Strip (CS) network relies on local neighbor communication. We show that positioning of Casparian Strip membrane domains (CSDs) is tightly coordinated between neighbors in wild-type and that restriction of domain formation involves the putative extracellular protease LOTR1. Impaired domain restriction in lotr1 leads to fully functional CSDs at ectopic positions, forming ‘half strips’. LOTR1 action in the endodermis requires its expression in the stele. LOTR1 endodermal expression cannot complement, while cortex expression causes a dominant-negative phenotype. Our findings establish LOTR1 as a crucial player in CSD positioning acting in a directional, non-cell-autonomous manner to restrict and coordinate CS positioning.
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Affiliation(s)
- Andreas Kolbeck
- Department of Plant Molecular Biology, University of Lausanne, Lausanne, Switzerland
| | - Peter Marhavý
- Department of Plant Molecular Biology, University of Lausanne, Lausanne, Switzerland
| | - Damien De Bellis
- Department of Plant Molecular Biology, University of Lausanne, Lausanne, Switzerland
| | - Baohai Li
- Department of Applied Biological Chemistry, University of Tokyo, Tokyo, Japan
| | - Takehiro Kamiya
- Department of Applied Biological Chemistry, University of Tokyo, Tokyo, Japan
| | - Toru Fujiwara
- Department of Applied Biological Chemistry, University of Tokyo, Tokyo, Japan
| | - Lothar Kalmbach
- Department of Plant Molecular Biology, University of Lausanne, Lausanne, Switzerland
| | - Niko Geldner
- Department of Plant Molecular Biology, University of Lausanne, Lausanne, Switzerland
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10
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Philippe G, De Bellis D, Rose JKC, Nawrath C. Trafficking Processes and Secretion Pathways Underlying the Formation of Plant Cuticles. Front Plant Sci 2022; 12:786874. [PMID: 35069645 PMCID: PMC8769167 DOI: 10.3389/fpls.2021.786874] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/30/2021] [Accepted: 11/10/2021] [Indexed: 05/10/2023]
Abstract
Cuticles are specialized cell wall structures that form at the surface of terrestrial plant organs. They are largely comprised lipidic compounds and are deposited in the apoplast, external to the polysaccharide-rich primary wall, creating a barrier to diffusion of water and solutes, as well as to environmental factors. The predominant cuticle component is cutin, a polyester that is assembled as a complex matrix, within and on the surface of which aliphatic and aromatic wax molecules accumulate, further modifying its properties. To reach the point of cuticle assembly the different acyl lipid-containing components are first exported from the cell across the plasma membrane and then traffic across the polysaccharide wall. The export of cutin precursors and waxes from the cell is known to involve plasma membrane-localized ATP-binding cassette (ABC) transporters; however, other secretion mechanisms may also contribute. Indeed, extracellular vesiculo-tubular structures have recently been reported in Arabidopsis thaliana (Arabidopsis) to be associated with the deposition of suberin, a polyester that is structurally closely related to cutin. Intriguingly, similar membranous structures have been observed in leaves and petals of Arabidopsis, although in lower numbers, but no close association with cutin formation has been identified. The possibility of multiple export mechanisms for cuticular components acting in parallel will be discussed, together with proposals for how cuticle precursors may traverse the polysaccharide cell wall before their assimilation into the cuticle macromolecular architecture.
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Affiliation(s)
- Glenn Philippe
- Plant Biology Section, School of Integrative Plant Science, Cornell University, Ithaca, NY, United States
| | - Damien De Bellis
- Department of Plant Molecular Biology, University of Lausanne, Lausanne, Switzerland
- Electron Microscopy Facility, University of Lausanne, Lausanne, Switzerland
| | - Jocelyn K. C. Rose
- Plant Biology Section, School of Integrative Plant Science, Cornell University, Ithaca, NY, United States
| | - Christiane Nawrath
- Department of Plant Molecular Biology, University of Lausanne, Lausanne, Switzerland
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11
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Elejalde-Palmett C, Martinez San Segundo I, Garroum I, Charrier L, De Bellis D, Mucciolo A, Guerault A, Liu J, Zeisler-Diehl V, Aharoni A, Schreiber L, Bakan B, Clausen MH, Geisler M, Nawrath C. ABCG transporters export cutin precursors for the formation of the plant cuticle. Curr Biol 2021; 31:2111-2123.e9. [PMID: 33756108 DOI: 10.1016/j.cub.2021.02.056] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2020] [Revised: 01/14/2021] [Accepted: 02/25/2021] [Indexed: 02/07/2023]
Abstract
The plant cuticle is deposited on the surface of primary plant organs, such as leaves, fruits, and floral organs, forming a diffusion barrier and protecting the plant against various abiotic and biotic stresses. Cutin, the structural polyester of the plant cuticle, is synthesized in the apoplast. Plasma-membrane-localized ATP-binding cassette (ABC) transporters of the G family have been hypothesized to export cutin precursors. Here, we characterize SlABCG42 of tomato representing an ortholog of AtABCG32 in Arabidopsis. SlABCG42 expression in Arabidopsis complements the cuticular deficiencies of the Arabidopsis pec1/abcg32 mutant. RNAi-dependent downregulation of both tomato genes encoding proteins highly homologous to AtABCG32 (SlABCG36 and SlABCG42) leads to reduced cutin deposition and formation of a thinner cuticle in tomato fruits. By using a tobacco (Nicotiana benthamiana) protoplast system, we show that AtABCG32 and SlABCG42 have an export activity for 10,16-dihydroxy hexadecanoyl-2-glycerol, a cutin precursor in vivo. Interestingly, also free ω-hydroxy hexadecanoic acid as well as hexadecanedioic acid were exported, furthering the research on the identification of cutin precursors in vivo and the respective mechanisms of their integration into the cutin polymer.
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Affiliation(s)
| | - Ignacio Martinez San Segundo
- Center for Nanomedicine and Theranostics, Department of Chemistry, Technical University of Denmark, 2800 Kgs. Lyngby, Denmark
| | - Imène Garroum
- Department of Plant Molecular Biology, University of Lausanne, 1015 Lausanne, Switzerland
| | - Laurence Charrier
- Department of Biology, University of Fribourg, 1700 Fribourg, Switzerland
| | - Damien De Bellis
- Department of Plant Molecular Biology, University of Lausanne, 1015 Lausanne, Switzerland; Electron Microscopy Facility, University of Lausanne, 1015 Lausanne, Switzerland
| | - Antonio Mucciolo
- Electron Microscopy Facility, University of Lausanne, 1015 Lausanne, Switzerland
| | - Aurore Guerault
- Department of Plant Molecular Biology, University of Lausanne, 1015 Lausanne, Switzerland
| | - Jie Liu
- Department of Biology, University of Fribourg, 1700 Fribourg, Switzerland
| | | | - Asaph Aharoni
- Department of Plant Sciences, Weizmann Institute of Science, Rehovot 7610001, Israel
| | - Lukas Schreiber
- Institute of Cellular and Molecular Botany, University of Bonn, 53115 Bonn, Germany
| | - Bénédicte Bakan
- INRAE, Biopolymers Interactions Assemblies UR1268, 44316 Nantes Cedex 3, France
| | - Mads H Clausen
- Center for Nanomedicine and Theranostics, Department of Chemistry, Technical University of Denmark, 2800 Kgs. Lyngby, Denmark
| | - Markus Geisler
- Department of Biology, University of Fribourg, 1700 Fribourg, Switzerland
| | - Christiane Nawrath
- Department of Plant Molecular Biology, University of Lausanne, 1015 Lausanne, Switzerland.
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12
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Ursache R, De Jesus Vieira Teixeira C, Dénervaud Tendon V, Gully K, De Bellis D, Schmid-Siegert E, Grube Andersen T, Shekhar V, Calderon S, Pradervand S, Nawrath C, Geldner N, Vermeer JEM. GDSL-domain proteins have key roles in suberin polymerization and degradation. Nat Plants 2021; 7:353-364. [PMID: 33686223 PMCID: PMC7610369 DOI: 10.1038/s41477-021-00862-9] [Citation(s) in RCA: 63] [Impact Index Per Article: 21.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/17/2020] [Accepted: 01/25/2021] [Indexed: 05/19/2023]
Abstract
Plant roots acquire nutrients and water while managing interactions with the soil microbiota. The root endodermis provides an extracellular diffusion barrier through a network of lignified cell walls called Casparian strips, supported by subsequent formation of suberin lamellae. Whereas lignification is thought to be irreversible, suberin lamellae display plasticity, which is crucial for root adaptative responses. Although suberin is a major plant polymer, fundamental aspects of its biosynthesis and turnover have remained obscure. Plants shape their root system via lateral root formation, an auxin-induced process requiring local breaking and re-sealing of endodermal lignin and suberin barriers. Here, we show that differentiated endodermal cells have a specific, auxin-mediated transcriptional response dominated by cell wall remodelling genes. We identified two sets of auxin-regulated GDSL lipases. One is required for suberin synthesis, while the other can drive suberin degradation. These enzymes have key roles in suberization, driving root suberin plasticity.
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Affiliation(s)
- Robertas Ursache
- Department of Plant Molecular Biology, University of Lausanne, Lausanne, Switzerland.
| | | | | | - Kay Gully
- Department of Plant Molecular Biology, University of Lausanne, Lausanne, Switzerland
| | - Damien De Bellis
- Department of Plant Molecular Biology, University of Lausanne, Lausanne, Switzerland
- Electron Microscopy Facility, University of Lausanne, Lausanne, Switzerland
| | - Emanuel Schmid-Siegert
- Vital-IT Competence Center, Swiss Institute of Bioinformatics, Lausanne, Switzerland
- NGSAI, Epalinges, Switzerland
| | - Tonni Grube Andersen
- Department of Plant Molecular Biology, University of Lausanne, Lausanne, Switzerland
- Max Planck Institute for Plant Breeding Research, Cologne, Germany
| | - Vinay Shekhar
- Laboratory of Cell and Molecular Biology, Institute of Biology, University of Neuchâtel, Neuchâtel, Switzerland
- Department of Plant and Microbial Biology & Zurich-Basel Plant Science Centre, University of Zurich, Zurich, Switzerland
| | - Sandra Calderon
- Vital-IT Competence Center, Swiss Institute of Bioinformatics, Lausanne, Switzerland
- Genomic Technologies Facility, University of Lausanne, Lausanne, Switzerland
| | - Sylvain Pradervand
- Vital-IT Competence Center, Swiss Institute of Bioinformatics, Lausanne, Switzerland
- Genomic Technologies Facility, University of Lausanne, Lausanne, Switzerland
| | - Christiane Nawrath
- Department of Plant Molecular Biology, University of Lausanne, Lausanne, Switzerland
| | - Niko Geldner
- Department of Plant Molecular Biology, University of Lausanne, Lausanne, Switzerland.
| | - Joop E M Vermeer
- Laboratory of Cell and Molecular Biology, Institute of Biology, University of Neuchâtel, Neuchâtel, Switzerland.
- Department of Plant and Microbial Biology & Zurich-Basel Plant Science Centre, University of Zurich, Zurich, Switzerland.
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13
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Nguyen NNT, Clua J, Vetal PV, Vuarambon DJ, De Bellis D, Pervent M, Lepetit M, Udvardi M, Valentine AJ, Poirier Y. PHO1 family members transport phosphate from infected nodule cells to bacteroids in Medicago truncatula. Plant Physiol 2021; 185:196-209. [PMID: 33631809 PMCID: PMC8133656 DOI: 10.1093/plphys/kiaa016] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/24/2020] [Accepted: 10/14/2020] [Indexed: 05/20/2023]
Abstract
Legumes play an important role in the soil nitrogen availability via symbiotic nitrogen fixation (SNF). Phosphate (Pi) deficiency severely impacts SNF because of the high Pi requirement of symbiosis. Whereas PHT1 transporters are involved in Pi uptake into nodules, it is unknown how Pi is transferred from the plant infected cells to nitrogen-fixing bacteroids. We hypothesized that Medicago truncatula genes homologous to Arabidopsis PHO1, encoding a vascular apoplastic Pi exporter, are involved in Pi transfer to bacteroids. Among the seven MtPHO1 genes present in M. truncatula, we found that two genes, namely MtPHO1.1 and MtPHO1.2, were broadly expressed across the various nodule zones in addition to the root vascular system. Expressions of MtPHO1.1 and MtPHO1.2 in Nicotiana benthamiana mediated specific Pi export. Plants with nodule-specific downregulation of both MtPHO1.1 and MtPHO1.2 were generated by RNA interference (RNAi) to examine their roles in nodule Pi homeostasis. Nodules of RNAi plants had lower Pi content and a three-fold reduction in SNF, resulting in reduced shoot growth. Whereas the rate of 33Pi uptake into nodules of RNAi plants was similar to control, transfer of 33Pi from nodule cells into bacteroids was reduced and bacteroids activated their Pi-deficiency response. Our results implicate plant MtPHO1 genes in bacteroid Pi homeostasis and SNF via the transfer of Pi from nodule infected cells to bacteroids.
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Affiliation(s)
- Nga N T Nguyen
- Department of Plant Molecular Biology, Biophore Building, University of Lausanne, Lausanne 1015, Switzerland
| | - Joaquin Clua
- Department of Plant Molecular Biology, Biophore Building, University of Lausanne, Lausanne 1015, Switzerland
| | - Pallavi V Vetal
- Department of Plant Molecular Biology, Biophore Building, University of Lausanne, Lausanne 1015, Switzerland
| | - Dominique Jacques Vuarambon
- Department of Plant Molecular Biology, Biophore Building, University of Lausanne, Lausanne 1015, Switzerland
| | - Damien De Bellis
- Department of Plant Molecular Biology, Biophore Building, University of Lausanne, Lausanne 1015, Switzerland
- Electron Microscopy Facility, Biophore Building, University of Lausanne, Lausanne 1015, Switzerland
| | - Marjorie Pervent
- Laboratoire des Symbioses Tropicales et Méditerranéennes UMR 1342 INRAE-IRD-CIRAD-UM-Montpellier SupAgro, Montpellier, France
| | - Marc Lepetit
- Laboratoire des Symbioses Tropicales et Méditerranéennes UMR 1342 INRAE-IRD-CIRAD-UM-Montpellier SupAgro, Montpellier, France
| | - Michael Udvardi
- The Noble Research Institute, 2510 Sam Noble Parkway, Ardmore, OK, USA
| | - Alexander J Valentine
- Botany & Zoology Department, University of Stellenbosch, Matieland 7602, South Africa
| | - Yves Poirier
- Department of Plant Molecular Biology, Biophore Building, University of Lausanne, Lausanne 1015, Switzerland
- Author for communication:
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14
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Fujita S, De Bellis D, Edel KH, Köster P, Andersen TG, Schmid-Siegert E, Dénervaud Tendon V, Pfister A, Marhavý P, Ursache R, Doblas VG, Barberon M, Daraspe J, Creff A, Ingram G, Kudla J, Geldner N. SCHENGEN receptor module drives localized ROS production and lignification in plant roots. EMBO J 2020; 39:e103894. [PMID: 32187732 PMCID: PMC7196915 DOI: 10.15252/embj.2019103894] [Citation(s) in RCA: 62] [Impact Index Per Article: 15.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2019] [Revised: 02/21/2020] [Accepted: 02/26/2020] [Indexed: 12/15/2022] Open
Abstract
Production of reactive oxygen species (ROS) by NADPH oxidases (NOXs) impacts many processes in animals and plants, and many plant receptor pathways involve rapid, NOX‐dependent increases of ROS. Yet, their general reactivity has made it challenging to pinpoint the precise role and immediate molecular action of ROS. A well‐understood ROS action in plants is to provide the co‐substrate for lignin peroxidases in the cell wall. Lignin can be deposited with exquisite spatial control, but the underlying mechanisms have remained elusive. Here, we establish a kinase signaling relay that exerts direct, spatial control over ROS production and lignification within the cell wall. We show that polar localization of a single kinase component is crucial for pathway function. Our data indicate that an intersection of more broadly localized components allows for micrometer‐scale precision of lignification and that this system is triggered through initiation of ROS production as a critical peroxidase co‐substrate.
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Affiliation(s)
- Satoshi Fujita
- Department of Plant Molecular Biology, Biophore, University of Lausanne, Lausanne, Switzerland
| | - Damien De Bellis
- Department of Plant Molecular Biology, Biophore, University of Lausanne, Lausanne, Switzerland.,Electron Microscopy Facility, University of Lausanne, Lausanne, Switzerland
| | - Kai H Edel
- Institut für Biologie und Biotechnologie der Pflanzen, Westfälische Wilhelms-Universität Münster, Münster, Germany
| | - Philipp Köster
- Institut für Biologie und Biotechnologie der Pflanzen, Westfälische Wilhelms-Universität Münster, Münster, Germany
| | - Tonni Grube Andersen
- Department of Plant Molecular Biology, Biophore, University of Lausanne, Lausanne, Switzerland
| | | | | | - Alexandre Pfister
- Department of Plant Molecular Biology, Biophore, University of Lausanne, Lausanne, Switzerland
| | - Peter Marhavý
- Department of Plant Molecular Biology, Biophore, University of Lausanne, Lausanne, Switzerland
| | - Robertas Ursache
- Department of Plant Molecular Biology, Biophore, University of Lausanne, Lausanne, Switzerland
| | - Verónica G Doblas
- Department of Plant Molecular Biology, Biophore, University of Lausanne, Lausanne, Switzerland
| | - Marie Barberon
- Department of Plant Molecular Biology, Biophore, University of Lausanne, Lausanne, Switzerland
| | - Jean Daraspe
- Electron Microscopy Facility, University of Lausanne, Lausanne, Switzerland
| | - Audrey Creff
- Laboratoire Reproduction et Développement des Plantes, Université de Lyon, ENS de Lyon, CNRS, INRAE, Lyon, France
| | - Gwyneth Ingram
- Laboratoire Reproduction et Développement des Plantes, Université de Lyon, ENS de Lyon, CNRS, INRAE, Lyon, France
| | - Jörg Kudla
- Institut für Biologie und Biotechnologie der Pflanzen, Westfälische Wilhelms-Universität Münster, Münster, Germany
| | - Niko Geldner
- Department of Plant Molecular Biology, Biophore, University of Lausanne, Lausanne, Switzerland
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15
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Keppner A, Maric D, Sergi C, Ansermet C, De Bellis D, Kratschmar DV, Canonica J, Klusonova P, Fenton RA, Odermatt A, Crambert G, Hoogewijs D, Hummler E. Deletion of the serine protease CAP2/Tmprss4 leads to dysregulated renal water handling upon dietary potassium depletion. Sci Rep 2019; 9:19540. [PMID: 31863073 PMCID: PMC6925205 DOI: 10.1038/s41598-019-55995-x] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2019] [Accepted: 12/04/2019] [Indexed: 01/09/2023] Open
Abstract
The kidney needs to adapt daily to variable dietary K+ contents via various mechanisms including diuretic, acid-base and hormonal changes that are still not fully understood. In this study, we demonstrate that following a K+-deficient diet in wildtype mice, the serine protease CAP2/Tmprss4 is upregulated in connecting tubule and cortical collecting duct and also localizes to the medulla and transitional epithelium of the papilla and minor calyx. Male CAP2/Tmprss4 knockout mice display altered water handling and urine osmolality, enhanced vasopressin response leading to upregulated adenylate cyclase 6 expression and cAMP overproduction, and subsequently greater aquaporin 2 (AQP2) and Na+-K+-2Cl− cotransporter 2 (NKCC2) expression following K+-deficient diet. Urinary acidification coincides with significantly increased H+,K+-ATPase type 2 (HKA2) mRNA and protein expression, and decreased calcium and phosphate excretion. This is accompanied by increased glucocorticoid receptor (GR) protein levels and reduced 11β-hydroxysteroid dehydrogenase 2 activity in knockout mice. Strikingly, genetic nephron-specific deletion of GR leads to the mirrored phenotype of CAP2/Tmprss4 knockouts, including increased water intake and urine output, urinary alkalinisation, downregulation of HKA2, AQP2 and NKCC2. Collectively, our data unveil a novel role of the serine protease CAP2/Tmprss4 and GR on renal water handling upon dietary K+ depletion.
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Affiliation(s)
- Anna Keppner
- Department of Pharmacology and Toxicology, University of Lausanne, Lausanne, Switzerland.,Department of Medicine/Physiology, University of Fribourg, Fribourg, Switzerland.,National Center of Competence in Research Kidney Control of Homeostasis (NCCR Kidney.CH), University of Lausanne, Lausanne, Switzerland
| | - Darko Maric
- Department of Pharmacology and Toxicology, University of Lausanne, Lausanne, Switzerland.,Department of Medicine/Physiology, University of Fribourg, Fribourg, Switzerland.,National Center of Competence in Research Kidney Control of Homeostasis (NCCR Kidney.CH), University of Lausanne, Lausanne, Switzerland
| | - Chloé Sergi
- Department of Pharmacology and Toxicology, University of Lausanne, Lausanne, Switzerland
| | - Camille Ansermet
- Department of Pharmacology and Toxicology, University of Lausanne, Lausanne, Switzerland
| | - Damien De Bellis
- Department of Pharmacology and Toxicology, University of Lausanne, Lausanne, Switzerland.,Electron Microscopy Facility, University of Lausanne, Lausanne, Switzerland.,Department of Plant Molecular Biology, University of Lausanne, Lausanne, Switzerland
| | - Denise V Kratschmar
- Department of Pharmaceutical Sciences, University of Basel, Basel, Switzerland.,National Center of Competence in Research Kidney Control of Homeostasis (NCCR Kidney.CH), University of Lausanne, Lausanne, Switzerland
| | - Jérémie Canonica
- Department of Pharmacology and Toxicology, University of Lausanne, Lausanne, Switzerland.,National Center of Competence in Research Kidney Control of Homeostasis (NCCR Kidney.CH), University of Lausanne, Lausanne, Switzerland.,Ophthalmic Hospital Jules Gonin, University of Lausanne, Lausanne, Switzerland
| | - Petra Klusonova
- Department of Pharmaceutical Sciences, University of Basel, Basel, Switzerland.,National Center of Competence in Research Kidney Control of Homeostasis (NCCR Kidney.CH), University of Lausanne, Lausanne, Switzerland
| | - Robert A Fenton
- Department of Biomedicine, Aarhus University, Aarhus, Denmark
| | - Alex Odermatt
- Department of Pharmaceutical Sciences, University of Basel, Basel, Switzerland.,National Center of Competence in Research Kidney Control of Homeostasis (NCCR Kidney.CH), University of Lausanne, Lausanne, Switzerland
| | | | - David Hoogewijs
- Department of Medicine/Physiology, University of Fribourg, Fribourg, Switzerland.,National Center of Competence in Research Kidney Control of Homeostasis (NCCR Kidney.CH), University of Lausanne, Lausanne, Switzerland
| | - Edith Hummler
- Department of Pharmacology and Toxicology, University of Lausanne, Lausanne, Switzerland. .,National Center of Competence in Research Kidney Control of Homeostasis (NCCR Kidney.CH), University of Lausanne, Lausanne, Switzerland.
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16
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Kalmbach L, Hématy K, De Bellis D, Barberon M, Fujita S, Ursache R, Daraspe J, Geldner N. Transient cell-specific EXO70A1 activity in the CASP domain and Casparian strip localization. Nat Plants 2017; 3:17058. [PMID: 28436943 DOI: 10.1038/nplants.2017.58] [Citation(s) in RCA: 64] [Impact Index Per Article: 9.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/12/2017] [Accepted: 03/24/2017] [Indexed: 06/07/2023]
Abstract
In a striking case of evolutionary convergence, polarized cell layers with ring-like diffusion barriers have evolved in both plant and animal lineages independently. In plants, ring-like Casparian strips become localized by the CASPARIAN STRIP MEMBRANE DOMAIN PROTEINS (CASPs). The mechanism of this striking localization, however, has remained enigmatic. Here we present a genetic screen aimed at isolating determinants of CASP localization. One of the mutants, lord of the rings 2 (lotr2)/exo70a1, displays dramatic de-localization of CASPs into randomly localized microdomains. EXO70A1 is a subunit of the exocyst complex, a central component of secretion in eukaryotes. Irradiation of EXO70 subunit genes in plants has suggested specialization of this conserved complex. Intriguingly, lotr2/exo70a1 does neither affect secretion of the CASPs, nor that of other membrane proteins in the endodermis, thus separating exocyst activity in localization from a general defect in secretion. Our results establish EXO70A1 as a central player in Casparian strip formation, generating a transient positional information that will be translated into a precisely localized cell wall modification.
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Affiliation(s)
- Lothar Kalmbach
- Department of Plant Molecular Biology, University of Lausanne, Biophore Building, UNIL-Sorge, 1015 Lausanne, Switzerland
| | - Kian Hématy
- Department of Plant Molecular Biology, University of Lausanne, Biophore Building, UNIL-Sorge, 1015 Lausanne, Switzerland
- Institut Jean-Pierre Bourgin, INRA, AgroParisTech, CNRS, Université Paris-Saclay, 78000 Versailles, France
| | - Damien De Bellis
- Department of Plant Molecular Biology, University of Lausanne, Biophore Building, UNIL-Sorge, 1015 Lausanne, Switzerland
- Electron Microscopy Facility, University of Lausanne, Biophore Building, UNIL-Sorge, 1015 Lausanne, Switzerland
| | - Marie Barberon
- Department of Plant Molecular Biology, University of Lausanne, Biophore Building, UNIL-Sorge, 1015 Lausanne, Switzerland
| | - Satoshi Fujita
- Department of Plant Molecular Biology, University of Lausanne, Biophore Building, UNIL-Sorge, 1015 Lausanne, Switzerland
| | - Robertas Ursache
- Department of Plant Molecular Biology, University of Lausanne, Biophore Building, UNIL-Sorge, 1015 Lausanne, Switzerland
| | - Jean Daraspe
- Electron Microscopy Facility, University of Lausanne, Biophore Building, UNIL-Sorge, 1015 Lausanne, Switzerland
| | - Niko Geldner
- Department of Plant Molecular Biology, University of Lausanne, Biophore Building, UNIL-Sorge, 1015 Lausanne, Switzerland
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17
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Mazurek S, Garroum I, Daraspe J, De Bellis D, Olsson V, Mucciolo A, Butenko MA, Humbel BM, Nawrath C. Connecting the Molecular Structure of Cutin to Ultrastructure and Physical Properties of the Cuticle in Petals of Arabidopsis. Plant Physiol 2017; 173:1146-1163. [PMID: 27994007 PMCID: PMC5291042 DOI: 10.1104/pp.16.01637] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/21/2016] [Accepted: 12/13/2016] [Indexed: 05/19/2023]
Abstract
The plant cuticle is laid down at the cell wall surface of epidermal cells in a wide variety of structures, but the functional significance of this architectural diversity is not yet understood. Here, the structure-function relationship of the petal cuticle of Arabidopsis (Arabidopsis thaliana) was investigated. Applying Fourier transform infrared microspectroscopy, the cutin mutants long-chain acyl-coenzyme A synthetase2 (lacs2), permeable cuticle1 (pec1), cyp77a6, glycerol-3-phosphate acyltransferase6 (gpat6), and defective in cuticular ridges (dcr) were grouped in three separate classes based on quantitative differences in the ν(C=O) and ν(C-H) band vibrations. These were associated mainly with the quantity of 10,16-dihydroxy hexadecanoic acid, a monomer of the cuticle polyester, cutin. These spectral features were linked to three different types of cuticle organization: a normal cuticle with nanoridges (lacs2 and pec1 mutants); a broad translucent cuticle (cyp77a6 and dcr mutants); and an electron-opaque multilayered cuticle (gpat6 mutant). The latter two types did not have typical nanoridges. Transmission electron microscopy revealed considerable variations in cuticle thickness in the dcr mutant. Different double mutant combinations showed that a low amount of C16 monomers in cutin leads to the appearance of an electron-translucent layer adjacent to the cuticle proper, which is independent of DCR action. We concluded that DCR is not only essential for incorporating 10,16-dihydroxy C16:0 into cutin but also plays a crucial role in the organization of the cuticle, independent of cutin composition. Further characterization of the mutant petals suggested that nanoridge formation and conical cell shape may contribute to the reduction of physical adhesion forces between petals and other floral organs during floral development.
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Affiliation(s)
- Sylwester Mazurek
- University of Lausanne, Department of Plant Molecular Biology (S.M., I.G., C.N.) and Electron Microscopy Facility (J.D., D.D.B., A.M., B.M.H.), CH-1015 Lausanne, Switzerland
- University of Wroclaw, Department of Chemistry, 50-383 Wroclaw, Poland (S.M.); and
- University of Oslo, Department of Biosciences, Section for Evolutionary Genetics, 0371 Oslo, Norway (V.O., M.A.B.)
| | - Imène Garroum
- University of Lausanne, Department of Plant Molecular Biology (S.M., I.G., C.N.) and Electron Microscopy Facility (J.D., D.D.B., A.M., B.M.H.), CH-1015 Lausanne, Switzerland
- University of Wroclaw, Department of Chemistry, 50-383 Wroclaw, Poland (S.M.); and
- University of Oslo, Department of Biosciences, Section for Evolutionary Genetics, 0371 Oslo, Norway (V.O., M.A.B.)
| | - Jean Daraspe
- University of Lausanne, Department of Plant Molecular Biology (S.M., I.G., C.N.) and Electron Microscopy Facility (J.D., D.D.B., A.M., B.M.H.), CH-1015 Lausanne, Switzerland
- University of Wroclaw, Department of Chemistry, 50-383 Wroclaw, Poland (S.M.); and
- University of Oslo, Department of Biosciences, Section for Evolutionary Genetics, 0371 Oslo, Norway (V.O., M.A.B.)
| | - Damien De Bellis
- University of Lausanne, Department of Plant Molecular Biology (S.M., I.G., C.N.) and Electron Microscopy Facility (J.D., D.D.B., A.M., B.M.H.), CH-1015 Lausanne, Switzerland
- University of Wroclaw, Department of Chemistry, 50-383 Wroclaw, Poland (S.M.); and
- University of Oslo, Department of Biosciences, Section for Evolutionary Genetics, 0371 Oslo, Norway (V.O., M.A.B.)
| | - Vilde Olsson
- University of Lausanne, Department of Plant Molecular Biology (S.M., I.G., C.N.) and Electron Microscopy Facility (J.D., D.D.B., A.M., B.M.H.), CH-1015 Lausanne, Switzerland
- University of Wroclaw, Department of Chemistry, 50-383 Wroclaw, Poland (S.M.); and
- University of Oslo, Department of Biosciences, Section for Evolutionary Genetics, 0371 Oslo, Norway (V.O., M.A.B.)
| | - Antonio Mucciolo
- University of Lausanne, Department of Plant Molecular Biology (S.M., I.G., C.N.) and Electron Microscopy Facility (J.D., D.D.B., A.M., B.M.H.), CH-1015 Lausanne, Switzerland
- University of Wroclaw, Department of Chemistry, 50-383 Wroclaw, Poland (S.M.); and
- University of Oslo, Department of Biosciences, Section for Evolutionary Genetics, 0371 Oslo, Norway (V.O., M.A.B.)
| | - Melinka A Butenko
- University of Lausanne, Department of Plant Molecular Biology (S.M., I.G., C.N.) and Electron Microscopy Facility (J.D., D.D.B., A.M., B.M.H.), CH-1015 Lausanne, Switzerland
- University of Wroclaw, Department of Chemistry, 50-383 Wroclaw, Poland (S.M.); and
- University of Oslo, Department of Biosciences, Section for Evolutionary Genetics, 0371 Oslo, Norway (V.O., M.A.B.)
| | - Bruno M Humbel
- University of Lausanne, Department of Plant Molecular Biology (S.M., I.G., C.N.) and Electron Microscopy Facility (J.D., D.D.B., A.M., B.M.H.), CH-1015 Lausanne, Switzerland
- University of Wroclaw, Department of Chemistry, 50-383 Wroclaw, Poland (S.M.); and
- University of Oslo, Department of Biosciences, Section for Evolutionary Genetics, 0371 Oslo, Norway (V.O., M.A.B.)
| | - Christiane Nawrath
- University of Lausanne, Department of Plant Molecular Biology (S.M., I.G., C.N.) and Electron Microscopy Facility (J.D., D.D.B., A.M., B.M.H.), CH-1015 Lausanne, Switzerland;
- University of Wroclaw, Department of Chemistry, 50-383 Wroclaw, Poland (S.M.); and
- University of Oslo, Department of Biosciences, Section for Evolutionary Genetics, 0371 Oslo, Norway (V.O., M.A.B.)
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18
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Barberon M, Vermeer JEM, De Bellis D, Wang P, Naseer S, Andersen TG, Humbel BM, Nawrath C, Takano J, Salt DE, Geldner N. Adaptation of Root Function by Nutrient-Induced Plasticity of Endodermal Differentiation. Cell 2016; 164:447-59. [PMID: 26777403 DOI: 10.1016/j.cell.2015.12.021] [Citation(s) in RCA: 274] [Impact Index Per Article: 34.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2015] [Revised: 10/16/2015] [Accepted: 11/26/2015] [Indexed: 10/22/2022]
Abstract
Plant roots forage the soil for minerals whose concentrations can be orders of magnitude away from those required for plant cell function. Selective uptake in multicellular organisms critically requires epithelia with extracellular diffusion barriers. In plants, such a barrier is provided by the endodermis and its Casparian strips--cell wall impregnations analogous to animal tight and adherens junctions. Interestingly, the endodermis undergoes secondary differentiation, becoming coated with hydrophobic suberin, presumably switching from an actively absorbing to a protective epithelium. Here, we show that suberization responds to a wide range of nutrient stresses, mediated by the stress hormones abscisic acid and ethylene. We reveal a striking ability of the root to not only regulate synthesis of suberin, but also selectively degrade it in response to ethylene. Finally, we demonstrate that changes in suberization constitute physiologically relevant, adaptive responses, pointing to a pivotal role of the endodermal membrane in nutrient homeostasis.
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Affiliation(s)
- Marie Barberon
- Department of Plant Molecular Biology, University of Lausanne, 1015 Lausanne, Switzerland.
| | | | - Damien De Bellis
- Department of Plant Molecular Biology, University of Lausanne, 1015 Lausanne, Switzerland; Electron Microscopy Facility, University of Lausanne, 1015 Lausanne, Switzerland
| | - Peng Wang
- Institute of Biological and Environmental Sciences, University of Aberdeen, Aberdeen AB24 3UU, UK
| | - Sadaf Naseer
- Department of Plant Molecular Biology, University of Lausanne, 1015 Lausanne, Switzerland
| | - Tonni Grube Andersen
- Department of Plant Molecular Biology, University of Lausanne, 1015 Lausanne, Switzerland
| | - Bruno Martin Humbel
- Electron Microscopy Facility, University of Lausanne, 1015 Lausanne, Switzerland
| | - Christiane Nawrath
- Department of Plant Molecular Biology, University of Lausanne, 1015 Lausanne, Switzerland
| | - Junpei Takano
- Research Faculty of Agriculture, Hokkaido University, Sapporo 060-8589, Japan
| | - David Edward Salt
- Institute of Biological and Environmental Sciences, University of Aberdeen, Aberdeen AB24 3UU, UK
| | - Niko Geldner
- Department of Plant Molecular Biology, University of Lausanne, 1015 Lausanne, Switzerland.
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