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Figure 8 | BMC Microbiology

Figure 8

From: Fungal-associated NO is involved in the regulation of oxidative stress during rehydration in lichen symbiosis

Figure 8

Schematic representation of the findings of the present work on the functional relation of nitric oxide (NO) with oxidative stress during rehydration of Ramalina farinacea in the context of current knowledge. Rehydration induces the functional reconstitution of electron chains, the most relevant being chloroplast photosynthesis and mitochondrial oxidative phosphorilation. During the process of reconstitution, membrane molecular architecture is not optimal and an elevated electron leaking from electron chains occurs. Electron leaking causes a burst of intracellular ROS. Nitric oxide is released mainly from mycobiont medular hyphae (NO production by photobionts has not been confirmed in the lichen but is likely). A decrease in lipid peroxidation of lichen thalli coincides with the peak of NO-endproductos. NO participates in chlorophyll photoprotection and stabilization during rehydration

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