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- doi: 10.1038/s41477-021-00862-9
- issn: 2055-0278
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Root formation Formation of roots Units of inheritance Units of heredity Polymers--Synthesis Synthesis of polymers Polymerisation Polymers and polymerization Soil Mould, Vegetable Vegetable mold Earth (Soils) Mold, Vegetable Plants--Roots Plant roots Proteids Service of process Service of papers Abuse of process Process Vegetable kingdom Plantae Plant kingdom Vegetation Wildlife Flora Lignins Soluble ferments Ferments Biocatalysts Horse-drawn vehicle driving Driving, Horse-drawn vehicle Driving Gases--Diffusion Liquids--Diffusion Synthesis, Biological Biological synthesis Shape Forms (Shapes) broadcastingCiter ce document
R. Ursache et al., « GDSL-domain proteins have key roles in suberin polymerization and degradation. », Serveur académique Lausannois, ID : 10.1038/s41477-021-00862-9
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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.