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Phosphorus-31 NMR studies of cell wall-associated calcium-phosphates in Ulva lactuca
Department of Plant Physiology, University of Lund, S-220 07 Lund, Sweden.
Linköping University, Department of Medical and Health Sciences, Division of Radiological Sciences. Linköping University, Faculty of Health Sciences. Linköping University, Center for Medical Image Science and Visualization (CMIV). Region Östergötland, Center for Surgery, Orthopaedics and Cancer Treatment, Department of Radiation Physics. Biological Sciences, University of Calgary, Calgary, Alberta, Canada.ORCID iD: 0000-0001-8661-2232
Biological Sciences, University of Calgary, Calgary, Alberta, Canada.
Department of Plant Physiology, University of Lund, S-220 07 Lund, Sweden.
1989 (English)In: Plant Physiology, ISSN 0032-0889, E-ISSN 1532-2548, Vol. 90, no 1, 230-236 p.Article in journal (Refereed) Published
Abstract [en]

Phosphate concentrations in the range 0.1 to 2.0 millimolar induced the formation of extracellular amorphous calcium-phosphates in the cell wall of the marine macro algae Ulva lactuca when they were cultivated in light in seawater at 20°C. A broad resonance representing these compounds as well as resonances for extracellular orthophosphate and polyphosphates could be followed by 31P-nuclear magnetic resonance spectroscopy. The presence of the calcium-phosphate made the cells brittle and it inhibited the growth of the macro algae and caused mortality within 1 week. The formation of the calcium-phosphates was influenced by the external phosphate concentration, the extracellular pH and the nature and concentration of the external nitrogen source. Furthermore, no formation of these compounds was observed when Ulva lactuca was cultivated in the dark, at low temperatures (5°C) or in the presence of 3-(3,4-dichlorophenyl)-1,1-dimethylurea. The complex could be removed through washes with ethylenediaminetetraacetate; this treatment did not alter the intracellular pH or the orthophosphate and polyphosphate pools and it restored growth.

Place, publisher, year, edition, pages
1989. Vol. 90, no 1, 230-236 p.
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Physical Chemistry
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URN: urn:nbn:se:liu:diva-114167DOI: http:/​/​dx.​doi.​org/​10.​1104/​pp.​90.​1.​230OAI: oai:DiVA.org:liu-114167DiVA: diva2:790761
Available from: 2015-02-25 Created: 2015-02-11 Last updated: 2017-12-04Bibliographically approved

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Lundberg, Peter

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Division of Radiological SciencesFaculty of Health SciencesCenter for Medical Image Science and Visualization (CMIV)Department of Radiation Physics
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