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- W4381891623 abstract "In soils of arid and semi-arid regions, nitrogen constitutes one of the most critical elements for plant nutrition. This makes it essential to look for mechanisms or tools that allow improving the nutrition of species of economic importance, without harming the environment. It is known that numerous species of bacteria participate in the biogeochemical cycle of nitrogen and promote its movement through the soil-plant system, thereby acquiring great relevance in plant nutrition. There are numerous antecedents of the response of alfalfa to inoculation with symbiotic fixing bacteria of atmospheric nitrogen, and this knowledge takes on greater importance in the organic production of this crop. The objective of the work was to isolate symbiotic fixing bacteria from atmospheric N2 in alfalfa cultivated in the central Valley of the province of Catamarca, to be used as potential biofertilizers. In a plot of sandy loam soil with little nitrogen availability and no inoculation history in more than 40 years, a random sampling of 60-day alfalfa plants (type RR) with spontaneous nodulation was carried out. The presence of nodules was observed and from them the isolations were made in YEMA culture medium, incubating at 28°C and their cultural characteristics were determined. The preliminary results indicate that in the initial physiological states of the legume the existence of nodules, which manifests the presence of native rhizosphere colonizing rhizobia and with high competitiveness in infection. The cultural characteristics of the isolates obtained show the variability of nodular strains, creamy, fluid, translucent, pink, white colonies were observed, with development times between 24 and 48 hours of rapid growth. Conclusion: Medicago sativa may nodule with rhizobia native to the Central Valley area of the Province of Catamarca, given its compatibility and ecological and biological adaptation, a desirable aspect in the future selection of strains. Knowledge of these symbiotic relationships will allow their integration with other production practices and the development of environmentally safe management techniques, seeking to maximize the productive efficiency of crops" @default.
- W4381891623 created "2023-06-25" @default.
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- W4381891623 date "2023-05-31" @default.
- W4381891623 modified "2023-09-25" @default.
- W4381891623 title "Spontane nodulation of Medicago sativa with native rhizobia of the Central Valley of Catamarca" @default.
- W4381891623 cites W1552429378 @default.
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- W4381891623 doi "https://doi.org/10.15406/jabb.2023.10.00329" @default.
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