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Journal Article

Arbuscular cell invasion coincides with extracellular vesicles and membrane tubules

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Lo Presti,  Libera
Department of Organismic Interactions, Alumni, Max Planck Institute for Terrestrial Microbiology, Max Planck Society;

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Kahmann,  Regine
Department of Organismic Interactions, Alumni, Max Planck Institute for Terrestrial Microbiology, Max Planck Society;

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Citation

Roth, R., Hillmer, S., Funaya, C., Chiapello, M., Schumacher, K., Lo Presti, L., et al. (2019). Arbuscular cell invasion coincides with extracellular vesicles and membrane tubules. NATURE PLANTS, 5(2), 204-+. doi:10.1038/s41477-019-0365-4.


Cite as: https://hdl.handle.net/21.11116/0000-0008-BF54-3
Abstract
During establishment of arbuscular mycorrhizal symbioses, fungal hyphae
invade root cells producing transient tree-like structures, the
arbuscules, where exchange of photosynthates for soil minerals occurs.
Arbuscule formation and collapse lead to rapid production and
degradation of plant and fungal membranes, their spatiotemporal dynamics
directly influencing nutrient exchange. We determined the
ultra-structural details of both membrane surfaces and the interstitial
apoplastic matrix by transmission electron microscopy tomography during
growth and senescence of Rhizophagus irregularis arbuscules in rice.
Invasive growth of arbuscular hyphae was associated with abundant fungal
membrane tubules (memtubs) and plant peri-arbuscular membrane
evaginations. Similarly, the phylogenetically distant arbuscular
mycorrhizal fungus, Gigaspora rosea, and the fungal maize pathogen,
Ustilago maydis, developed memtubs while invading host cells, revealing
structural commonalities independent of the mutualistic or parasitic
outcome of the interaction. Additionally, extracellular vesicles formed
continuously in the peri-arbuscular interface from arbuscule biogenesis
to senescence, suggesting an involvement in inter-organismic signal and
nutrient exchange throughout the arbuscule lifespan.