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Control of matric water potential (ψm) in immobilised cultures of cyanobacteria (1984)

Potts, Malcolm ; Bowman, Mark A. ; Morrison, Nancy S.

Oxford, UK : Blackwell Publishing Ltd

FEMS microbiology letters 24 (1984), S. 0

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ISSN: 1574-6968

Source: Blackwell Publishing Journal Backfiles 1879-2005

Topics: Biology

Notes: Abstract Three simple methods are described that permit cells of cyanobacteria, immobilised on filter supports, to be subjected to matric water stress that leads to a downshift in nitrogenase activity. In Nostoc commune, a desiccation-tolerant form, nitrogenase activity is more sensitive to water stress than the intracellular ATP pool. When it is dried rapidly to −99.5 MPa, nitrogenase activity ceases within 30 min while the ATP pool is maintained at 16.07 pmol ATP ·μg protein−1. During short-term incubation, decreasing ψm from −0.10 to −23.1 MPa may result in an increased rate of CO2 uptake.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1111/j.1574-6968.1984.tb01303.x

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