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De Jesus Vieira Teixeira, Cristovão

Nom
De Jesus Vieira Teixeira, Cristovão
Affiliation principale
Fonction
Doctorant.e
Identifiants
https://libra.unine.ch/handle/123456789/33272
_
0000-0003-3984-5513

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  • Publication
    Accès libre
    An atlas of Brachypodium distachyon lateral root development
    (2024)
    De Jesus Vieira Teixeira, Cristovão 
    ;
    Kevin Bellande
    ;
    Alja van der Schuren
    ;
    Devin O'Connor
    ;
    Christian S. Hardtke
    ;
    Vermeer, Joop 
    The root system of plants is a vital part for successful development and adaptation to different soil types and environments. A major determinant of the shape of a plant root system is the formation of lateral roots, allowing for expansion of the root system. Arabidopsis thaliana, with its simple root anatomy, has been extensively studied to reveal the genetic program underlying root branching. However, to get a more general understanding of lateral root development, comparative studies in species with a more complex root anatomy are required. Here, by combining optimized clearing methods and histology, we describe an atlas of lateral root development in Brachypodium distachyon, a wild, temperate grass species. We show that lateral roots initiate from enlarged phloem pole pericycle cells and that the overlying endodermis reactivates its cell cycle and eventually forms the root cap. In addition, auxin signaling reported by the DR5 reporter was not detected in the phloem pole pericycle cells or young primordia. In contrast, auxin signaling was activated in the overlying cortical cell layers, including the exodermis. Thus, Brachypodium is a valuable model to investigate how signaling pathways and cellular responses have been repurposed to facilitate lateral root organogenesis.
  • Publication
    Accès libre
    GDSL-domain proteins have key roles in suberin polymerization and degradation
    (2021-3-8)
    Ursache, Robertas
    ;
    De Jesus Vieira Teixeira, Cristovão 
    ;
    Dénervaud Tendon, Valérie
    ;
    Gully, Kay
    ;
    De Bellis, Damien
    ;
    Schmid-Siegert, Emanuel
    ;
    Grube Andersen, Toni
    ;
    Shekhar, Vinay
    ;
    Calderon, Sandra
    ;
    Pradervand, Sylvain
    ;
    Nawrath, Christiane
    ;
    Geldner, Niko
    ;
    Vermeer, Joop 
    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.