Looping Network Meetings

#59 December 2, 2024

Monday 15:00 (Paris/Warsaw time)

Corentin Bisot (Vrije Universiteit Amsterdam)

Lipid transport drive bidirectional flows in the plant-mycorrhizal symbiosis

Abstract:
The plant-mycorrhizal symbiosis is fundamental to terrestrial ecosystems and is responsible large flows of nutrients at the planetary scale. In this symbiosis, two distinct organisms are trading phosphorus (P) against energy in the form of carbon (C). Yet, the mechanism behind the bidirectional transport of ressources within their microscopic hyphae has not been entirely elucidated.We imaged transport dynamics of nutrient flows in high resolution in different position of a growing networks. We find that carbon is most probably moving across the network on an oriented network of molecular motor filaments. Our findings also suggest a tight coupling between network growth, internal carbon (lipid) transport dynamics, and bidirectional fluid movement within the network. The movement of lipid in the closed pipe system inherently produces a backflow of cytoplasmic fluid which may be responsible for the movement of phosphorus. Our model provides a possible explanation to the observed proportionality in resource exchange between the two organisms.

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