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SALT UPTAKE AND RESPIRATION OF EXCISED BEECH MYCORRHIZAS
Author(s) -
HARLEY J. L.
Publication year - 1981
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.1469-8137.1981.tb03203.x
Subject(s) - beech , ammonium , respiration , phosphate , ammonium phosphate , chemistry , salt (chemistry) , botany , zoology , biology , biochemistry , organic chemistry , fertilizer
SUMMARY When excised beech mycorrhizas aged in aerated water absorb ammonium from NH 4 C1 solutions in the presence of low concentrations of 32 P‐labelled KH 2 PO 4 , the incorporation of 32 P in the tissues during a 2‐min period was greater than when ammonium was not supplied. At the same time, the respiratory rate was also greatly increased. The destination of the phosphate incorporated was similar whether ammonium was present or not. The results are consistent with the view that the respiratory rate of aged beech mycorrhizas is limited by the rate of phosphate turnover and the availability of phosphate acceptors, and that the absorption of ammonium increases this turnover.