Seasonal dynamics of arbuscular mycorrhizal fungal community associated with Sarcandra glabra under Cunninghamia lanceolata plantation
This study documented the seasonal variation of arbuscular mycorrhizal fungal(AMF)community associated with Sarcandra glabra planted under Cunninghamia lanceolata forest stand.By quantifying the mycorrhizal colonization rate,fungal hyphal density in rhizosphere soil,diversity of AMF,as well as the rhizosphere soil properties,we analyzed the potential effects of soil properties on AMF community structure's seasonal dynamics.We identified 440 OTUs in the roots of S.glabra,including 14 genera and 9 families of AMF.Glomus was the dominant genus.The relative abundance of Glomus was highest in January and September,reaching up to 99%.Meanwhile,the mycorrhizal colonization was higher in January and September than in other months,and the hyphal density in the rhizosphere soil was the highest in September.Soil total phosphorus,total potassium,available phosphorus,available potassium,and soil water content were the main factors affecting the structure of AMF community in roots of S.glabra,with the effects of total phosphorus and water content being significant(P<0.05).