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Indole‐3‐Acetic Acid (IAA) Oxidation by Leghemoglobin form Soybean
Author(s) -
PUPPO ALAIN,
RIGAUD JEAN
Publication year - 1975
Publication title -
physiologia plantarum
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.351
H-Index - 146
eISSN - 1399-3054
pISSN - 0031-9317
DOI - 10.1111/j.1399-3054.1975.tb03889.x
Subject(s) - leghemoglobin , chemistry , ferric , indole 3 acetic acid , biochemistry , sephadex , catabolism , acetic acid , heme , ammonium sulfate , paracoccus denitrificans , hemeprotein , hemin , chromatography , organic chemistry , auxin , metabolism , enzyme , nitrogen , nitrogen fixation , root nodule , gene
Leghemoglobin from nudules of soybean prepated by ammonium sulfate frationation appeared to be able to destroy substantial quantities of IAA, Degradation still occurred in purified leghemoglobin preparations isolated by G‐100 Sephadex chromatography. Nicotinic acid and acetate affecting the conformation of leghemoglobin both inhibited IAA oxidation by this hemoprotein. The ferric form was found to be the most active in this catabolism. This oxication, related to the psedudoperocidase activity of leghemoghlobin, is undoubtedly restricted in vivo by the very low level of the ferric form present in efficient nodules.