Resistance of Spirulina platensis to ammonia at high pH values

Shimshon Belkin; Sammy Boussiba

doi:10.1093/oxfordjournals.pcp.a078182

Resistance of Spirulina platensis to ammonia at high pH values

Shimshon Belkin, Sammy Boussiba

The French Associates Institute for Agriculture and Biotechnology of Drylands

Research output: Contribution to journal › Article › peer-review

78 Scopus citations

Abstract

Spirulina platensis is an alkalophilic cyanobacterium, exhibiting optimal growth at pH 9.0 to 10.0. It grows well at pH 11.5 but not at pH 7.0. Unlike many other photosynthetic microorganisms, it is capable of utilizing ammonia³ even at high pH values, and is resistant to the ammonia-mediated uncoupling of photosynthesis. The entry of ammonia into the cells is ΔpH-dependent, and is limited by a relatively high average internal pH. This high pH value appears to be maintained predominantly by a high intrathylakoid pH.

Original language	English
Pages (from-to)	953-958
Number of pages	6
Journal	Plant and Cell Physiology
Volume	32
Issue number	7
DOIs	https://doi.org/10.1093/oxfordjournals.pcp.a078182
State	Published - 1 Jan 1991

Keywords

Ammonia toxicity
Ammonia uptake
PH gradients
Spirulina platensis

ASJC Scopus subject areas

Physiology
Plant Science
Cell Biology

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10.1093/oxfordjournals.pcp.a078182

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title = "Resistance of Spirulina platensis to ammonia at high pH values",

abstract = "Spirulina platensis is an alkalophilic cyanobacterium, exhibiting optimal growth at pH 9.0 to 10.0. It grows well at pH 11.5 but not at pH 7.0. Unlike many other photosynthetic microorganisms, it is capable of utilizing ammonia3 even at high pH values, and is resistant to the ammonia-mediated uncoupling of photosynthesis. The entry of ammonia into the cells is ΔpH-dependent, and is limited by a relatively high average internal pH. This high pH value appears to be maintained predominantly by a high intrathylakoid pH.",

keywords = "Ammonia toxicity, Ammonia uptake, PH gradients, Spirulina platensis",

author = "Shimshon Belkin and Sammy Boussiba",

note = "Funding Information: This research was supported by grant no. 8800175/1 from the U.S.-Israel Binational Science Foundation (BSF), Jerusalem, Israel. The help of R. Milkis is gratefully acknowledged. The authors wish to thank Dr. Z. Luz and his colleagues at the Weizmann Institute of Science, Rehovot, for the use of their ESR spectrometer.",

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doi = "10.1093/oxfordjournals.pcp.a078182",

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N2 - Spirulina platensis is an alkalophilic cyanobacterium, exhibiting optimal growth at pH 9.0 to 10.0. It grows well at pH 11.5 but not at pH 7.0. Unlike many other photosynthetic microorganisms, it is capable of utilizing ammonia3 even at high pH values, and is resistant to the ammonia-mediated uncoupling of photosynthesis. The entry of ammonia into the cells is ΔpH-dependent, and is limited by a relatively high average internal pH. This high pH value appears to be maintained predominantly by a high intrathylakoid pH.

AB - Spirulina platensis is an alkalophilic cyanobacterium, exhibiting optimal growth at pH 9.0 to 10.0. It grows well at pH 11.5 but not at pH 7.0. Unlike many other photosynthetic microorganisms, it is capable of utilizing ammonia3 even at high pH values, and is resistant to the ammonia-mediated uncoupling of photosynthesis. The entry of ammonia into the cells is ΔpH-dependent, and is limited by a relatively high average internal pH. This high pH value appears to be maintained predominantly by a high intrathylakoid pH.

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Resistance of Spirulina platensis to ammonia at high pH values

Abstract

Keywords

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