Biodiversity of wild Lactococcus lactis and their geo-spatial relationship with the environment
Fecha
2022Autor
Maidana, Mario Maximiliano
Contreras, Félix Ignacio
Vasek, Olga Miriam
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Lactic acid bacteria are distributed in nature, isolating themselves from diverse
ecosystems and presenting a wide metabolic biodiversity. In Corrientes (Argentina),
artisanal cheeses and their specifi c environment are an important source of autochthonous
lactic acid bacteria. The objective of this work was to establish associations between
the phenotypic characteristics of strains of Lactococcus lactis subsp. lactis native from
Corrientes with climatological data of the Province and the characteristics of the soil
and the landscapes. Physiological and biochemical characterization data of Lactococcus
lactis subsp. lactis isolated from the dairy environment and from different localities
of Corrientes will be used. The strains were space-located through Google Earth, fl ood
and drought events were evaluated using Standardized Precipitation Evapotranspiration
Index, and soil composition data (A and Bt horizons) in the study areas were obtained
from the experimental station National Institute of Agricultural Technology - Corrientes.
A statistical analysis was applied to these results (Infostat Software, Di Rienzo et al.
2008). The resulting consists in three conglomerates, differentiating strains from soils
coming from “fl ooded landscapes” and those from “sandy hills landscape”. The analysis
by main components highlighted the preference of strains from fl ooded landscapes by a
saline-alkaline environment, affecting during periods of drought, and strains from sandy
hills landscape by a low medium in salts and acid soil, directly during period of high
humidity resulting from previous fl oods.
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