Abstract
Arbuscular mycorrhizal fungi (AMF) are key organisms in viticultural ecosystems as they provide many ecosystem services to soils and plants. Data about AMF community dynamics over time are relatively scarce and at short time scales. Many factors such as the soil, climate, and agricultural practices could modify the dynamics and functions of microbial communities. However, the effects on microbial communities of plant phenology and changes in plant physiology over time largely have been overlooked. We analyzed the diversity of AMF in three geographically close vineyards with similar soil parameters for 2years. The plots differed in grapevine age (11, 36, and110years), but had the same soil management practice (horse tillage). Diversity analyses revealed a difference in the composition of AMF communities between the soil and grapevine roots and among roots of grapevines of different ages. This underlines AMF adaptation to physiological changes in the host which can explain the development of different AMF communities. The dynamics of AMF communities can highlight their resilience to environmental changes and agricultural practices.
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