absorption of inorganic phosphate from 32P-labeled inositol hexaphosphate by Eriophorum vaginatum

A scarcity of available phosphorus often limits plant growth, and organic forms of phosphorus are not generally thought to be important direct sources of phosphate for plants. A dominant arctic tundra plant, Eriophorum vaginatum, is able to hydrolyze and absorb phosphate from a naturally occurring o...

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Bibliographic Details
Published in:Oecologia 1991, Vol.85 (3), p.424-428
Main Authors: Kroehler, C.J, Linkins, A.E
Format: Article
Language:English
Subjects:
Animal and plant ecology
Animal, plant and microbial ecology
Autoecology
Biological and medical sciences
Eriophorum vaginatum
Fundamental and applied biological sciences. Psychology
phosphoric monoester hydrolases
phosphorus
phosphorus cycling
phytic acid
Plants and fungi
roots
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Summary:A scarcity of available phosphorus often limits plant growth, and organic forms of phosphorus are not generally thought to be important direct sources of phosphate for plants. A dominant arctic tundra plant, Eriophorum vaginatum, is able to hydrolyze and absorb phosphate from a naturally occurring organic phosphorus compound at concentrations as low as those found in soil solution and at rates comparable to its ability to absorb inorganic phosphate. Calculations show that in tundra soils, where organic phosphorus is typically the predominant form of phosphorus in soil solution, E. vaginatum's root surface phosphatases may be capable of providing from organic phosphorus up to 69% of the plant's annual phosphorus demand.
ISSN:0029-8549
1432-1939
DOI:10.1007/BF00320620