Physiological Effects of Salinity on a Marine Diazotrophic Bacterium Associated with the Seagrass Halodule wrightii

Autor:	S. S. Hayasaka, T. R. Davidson
Rok vydání:	1992
Předmět:	biology Halodule wrightii Nitrogenase Plant Science Aquatic Science biology.organism_classification Salinity Seagrass Botany Osmotic pressure Seawater Diazotroph Turbidity Ecology Evolution Behavior and Systematics
Zdroj:	botm. 35:173-180
ISSN:	1437-4323 0006-8055
DOI:	10.1515/botm.1992.35.3.173
Popis:	A marine diazotrophic bacterium, KP-2, was unable to grow below 5‰ salinity and had optimal salinities for growth at 20-30‰ and 20-50‰, respectively, in nitrogen-free and fixed-nitrogen media. A primary requirement of seawater for this bacterium was to maintain cell integrity. Ions of Mg ++ plus Na + or K + were required for culture to maintain maximum turbidity and prevent release of 260 μm absorbing material. At salinities of 30-50‰, growth was significantly inhibited in a nitrogen-free medium but not in a fixed-nitrogen medium. Whole-cell nitrogenase activity also was inhibited above 30‰ salinity (...)
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::58dd689bd20a126e6e8e3dd93dbe4308 https://doi.org/10.1515/botm.1992.35.3.173 Zobrazit plný text záznamu