ArticleThe New phytologist2022
Laccaria bicolor pectin methylesterases are involved in ectomycorrhiza development with Populus tremula × Populus tremuloides.
Article in The New phytologist, 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 8 papers.
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8 citing papers in PubMed, 21 citations in OpenAlex.
- Molecular mechanisms modulating beneficial plant root-microbe interactions: What's common?Plant communications · 2026Review
- Comparative transcriptomics uncovers poplar and fungal genetic determinants of ectomycorrhizal compatibility.The Plant journal : for cell and molecular biology · 2025Article
- Ectomycorrhizal symbiosis evolved independently and by convergent gene duplication in rosid lineages.The New phytologist · 2025Article
- Morphological and molecular development of Terfezia claveryi ectendomycorrhizae exhibits three well-defined stages.Mycorrhiza · 2025Article
- Differential Strategies of Ectomycorrhizal Development betweenJournal of fungi (Basel, Switzerland) · 2024Article
- Salivary carbonic anhydrase II in winged aphid morph facilitates plant infection by viruses.Proceedings of the National Academy of Sciences of the United States of America · 2023Article
- Morphological and Transcriptional Characteristics of the Symbiotic Interaction betweenJournal of fungi (Basel, Switzerland) · 2022Article
- Fluorogenic properties of 4-dimethylaminocinnamaldehyde (DMACA) enable high resolution imaging of cell-wall-bound proanthocyanidins in plant root tissues.Frontiers in plant science · 2022Article
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Authors and funding
8 authors at 3 institutions in 2 countries.
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No grant is acknowledged in the PubMed record.
Abstract
The development of ectomycorrhizal (ECM) symbioses between soil fungi and tree roots requires modification of root cell walls. The pectin-mediated adhesion between adjacent root cells loosens to accommodate fungal hyphae in the Hartig net, facilitating nutrient exchange between partners. We investigated the role of fungal pectin modifying enzymes in Laccaria bicolor for ECM formation with Populus tremula × Populus tremuloides. We combine transcriptomics of cell-wall-related enzymes in both partners during ECM formation, immunolocalisation of pectin (Homogalacturonan, HG) epitopes in different methylesterification states, pectin methylesterase (PME) activity assays and functional analyses of transgenic L. bicolor to uncover pectin modification mechanisms and the requirement of fungal pectin methylesterases (LbPMEs) for ECM formation. Immunolocalisation identified remodelling of pectin towards de-esterified HG during ECM formation, which was accompanied by increased LbPME1 expression and PME activity. Overexpression or RNAi of the ECM-induced LbPME1 in transgenic L. bicolor lines led to reduced ECM formation. Hartig Nets formed with LbPME1 RNAi lines were shallower, whereas those formed with LbPME1 overexpressors were deeper. This suggests that LbPME1 plays a role in ECM formation potentially through HG de-esterification, which initiates loosening of adjacent root cells to facilitate Hartig net formation.
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