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Bactéries hétérotrophes aérobies prélevées devant le delta du rhône. I- estimation quantitative des populations et d#x00E9;termination

✍ Scribed by B. R. Berland; D. J. Bonin; J.-P. Durbec; S. Y. Maestrini

Publisher
Springer
Year
1975
Tongue
English
Weight
868 KB
Volume
47
Category
Article
ISSN
1573-5141

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✦ Synopsis

A bacterial population has been sampled in front of the Rh6ne outlet in the Mediterranean Sea. Quantitative estimations of cells density show important variations resulting from river outflow; data ranged from 5 x 10 3 to 1,7 x l0 s cells/ml.

Standard taxinomic methods are used to assign tentative genera. Most of the bacteria are Gram negative sporeless rods, especially those which are motile.

The strains belong to the genera Pseudomonus-Xanthomonas (49°/o), Achromobazter-Alcaligenes (13%), Flavobacterium (13%), Bacillus, Micrococcus, Proteus, Vibrio ; a few remain unknown or are not bacteria but yeasts.

Many strains hold proteolytic activity potential; on the contrary carbohydrates are scarcely assimilated.

In spite of the influence of river waters, 50% of the strains are obviously from marine origin.

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Bactéries hétérotrophes aérobies prélevé
Bactéries hétérotrophes aérobies prélevés devant le delta du rhône. IV. Besoins en vitamines et liberation de ces substances
✍ B. R. Berland; D. J. Bonin; J. P. Durbec; S. Y. Maestrini 📂 Article 📅 1976 🏛 Springer 🌐 English ⚖ 472 KB

Aerobic heterotrophic bacteria isolated in front of the Rhbne outlet. IV. Requirements and production of vitamins. The authors have isolated 232 bacteria, belonging to the usual genera found in sea water, from eutrophic surface sea water and studied their vitamin requirements with special attention