Université de Neuchâtel

Calcitic nanofibres in soils and caves : a putative fungal contribution to carbonatogenesis

Bindschedler, Saskia ; Millière, L ; Cailleau, G ; Job, Daniel ; Verrechia, Eric P

In: Geological Society, London, Special Publications, 2010, vol. 336, no. 1, p. 225-238

The origin of soil mineralized nanofibres remains controversial. It is attributed to either biogenic factors or physicochemical processes. Scanning electron microscope and transmission electron microscope observations show that nanofibres could originate from the breakdown of fungal hyphae, especially its cell wall. It is hypothesized that during the decay of organic matter, cell wall...

Université de Neuchâtel

Gains of Bacterial Flagellar Motility in a Fungal World

Pion, Martin ; Bshary, Redouan ; Bindschedler, Saskia ; Filippidou, Sevasti ; Wick, Lukas Y ; Job, Daniel ; Junier, Pilar

In: Applied and Environmental Microbiology, 2013, vol. 79, no. 22, p. 6862-6867

The maintenance of energetically costly flagella by bacteria in non-water-saturated media, such as soil, still presents an evolutionary conundrum. Potential explanations have focused on rare flooding events allowing dispersal. Such scenarios, however, overlook bacterial dispersal along mycelia as a possible transport mechanism in soils. The hypothesis tested in this study is that dispersal along...

Université de Neuchâtel

Bacterial farming by the fungus Morchella crassipes

Pion, Martin ; Spangenberg, Jorge E ; Simon, Anaele ; Bindschedler, Saskia ; Flury, Coralie ; Chatelain, Auriel ; Bshary, Redouan ; Job, Daniel ; Junier, Pilar

In: Proceedings of the Royal Society B: Biological Sciences, 2013, vol. 280, no. 1173, p. 20132242

The interactions between bacteria and fungi, the main actors of the soil microbiome, remain poorly studied. Here, we show that the saprotrophic and ectomycorrhizal soil fungus Morchella crassipes acts as a bacterial farmer of Pseudomonas putida, which serves as a model soil bacterium. Farming by M. crassipes consists of bacterial dispersal, bacterial rearing with fungal...