Premium
VANADIUM AS A TRACE ELEMENT IN THE BLUE‐GREEN ALGA, NOSTOC MUSCORUM : INFLUENCE ON NITROGENASE AND NITRATE REDUCTASE
Author(s) -
VAISHAMPAYAN A.
Publication year - 1983
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.1469-8137.1983.tb03468.x
Subject(s) - nitrate reductase , nitrogenase , vanadium , molybdate , molybdenum , chemistry , nitrate , sodium molybdate , sodium nitrate , salinity , vanadate , botany , nitrogen , inorganic chemistry , nuclear chemistry , biology , biochemistry , enzyme , nitrogen fixation , ecology , organic chemistry
S ummary Molybdenum (Mo), a group VI B element (applied in the form of sodium molybdate at a concentration of 0.0177 ppm), is required for the nitrogenase and nitrate reductase activities of Nostoc muscorum and hence for growth on N 2 and NO − 3 . These enzymic activities, as well as the growth of Mo‐containing cultures, are significantly enhanced by the addition of 0.0125 ppm vanadium (V), an element belonging to group V (applied in the form of sodium vanadate). At concentrations above 0.0125 ppm. V addition inhibits nitrogenase and nitrate reductase activities and ultimately leads to a retardation of growth on N 2 and NO − 3 . Molybdenum and/or V has no effect on the growth of N. muscorum with NO − 2 as nitrogen source.