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TRANSLOCATION AND TRANSFER OF NUTRIENTS IN VESICULAR‐ARBUSCULAR MYCORRHIZAS. III. POLYPHOSPHATE GRANULES AND PHOSPHORUS TRANSLOCATION
Author(s) -
COX G.,
MORAN K. J.,
SANDERS F.,
NOCKOLDS C.,
TINKER P. B.
Publication year - 1980
Publication title -
new phytologist
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.742
H-Index - 244
eISSN - 1469-8137
pISSN - 0028-646X
DOI - 10.1111/j.1469-8137.1980.tb04778.x
Subject(s) - polyphosphate , chromosomal translocation , phosphorus , cytoplasmic streaming , cytoplasm , mycelium , biology , biophysics , nutrient , microanalysis , botany , chemistry , phosphate , microbiology and biotechnology , biochemistry , ecology , organic chemistry , gene
S ummary X‐ray microanalysis has confirmed, and measured, the phosphorus content (0·03 g cm ‐3 ) of cytochemically‐demonstrated polyphosphate granules in onion mycorrhizas. The volume occupied by the granules measured from stereoscopic high‐voltage electron micrographs of thick sections was 0·8 % of the fungal volume, and cytoplasmic streaming rates of the extra‐matrical mycelium in soil measured in the light microscope were around 12·6 cm h ‐1 . From these data a flux rate of about 2·7 × 10 ‐8 mol P cm ‐2 s ‐1 has been calculated, which fulfils the hypothesis that phosphorus is translocated in the fungus by means of the transport of polyphosphate granules by cytoplasmic streaming.