Influence of Climate on Soil and Wine Bacterial Diversity on a Vineyard in a Non-traditional Wine Region in Argentina

Frontiers in Microbiology

Liliana C. Semorile¹  Andrea C. Guillade¹  Lucrecia Delfederico¹  Gabriel A. Rivas² 

[1] Laboratorio de Microbiología Molecular, Departamento de Ciencia y Tecnología, Instituto de Microbiología Básica y Aplicada (IMBA), Universidad Nacional de Quilmes (UNQ), Bernal, Argentina;National Scientific and Technical Research Council Argentina (CONICET), Bernal, Argentina;

关键词: climate conditions;    vineyard management;    Malbec wine;    amplicon sequencing;    bacterial diversity;   

DOI  :  10.3389/fmicb.2021.726384

来源: DOAJ

【 摘 要 】

Argentina is the fifth world-wide wine producer, with an area of emerging importance in the Southwest of Buenos Aires Province, where climatic conditions are rather challenging. We studied the variations in soil and wine bacterial diversity through three consecutive vintages, and how climatic conditions affected said diversity. During the years of our study there were two harsh climatic events, a prolonged drought that extended over two vegetative periods, and an unseasonable spring frost in 2017. We found that the bacterial diversity reacted to these climatic events, given that there was a shift in the taxa exclusive to soil and wine, and shared by both, through time. Our results show a core of microorganisms in soil as well as in wine, belonging to different phyla that are conserved across the vintage years. A trend to an enrichment in Actinobacteria was detected in soil samples, whereas a high relative abundance of the Acetobacteraceae family and a scarcity of Lactic Acid Bacteria (LAB) were detected in the wine samples. We believe our results contribute to a better understanding of the impact of climatic conditions on the soil and wine microbiota, and can provide vintners with valuable knowledge for improving their wine production.

【 授权许可】

Unknown