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Oxidation of coniferyl alcohol by cell wall peroxidases at the expense of indole‐3‐acetic acid and O 2
Author(s) -
Ferrer María A.,
Pedreño María A.,
Muñoz Romualdo,
Barceló A.Ros
Publication year - 1990
Publication title -
febs letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.593
H-Index - 257
eISSN - 1873-3468
pISSN - 0014-5793
DOI - 10.1016/0014-5793(90)80524-m
Subject(s) - coniferyl alcohol , peroxidase , lignin , indole 3 acetic acid , chemistry , cell wall , biochemistry , acetic acid , enzyme , organic chemistry , auxin , gene
The oxidation of coniferyl alcohol (CA), a lignin precursor, by cell wall peroxidases may take place at the expense of indole‐3‐acetic acid (IAA) and O 2 , and in the absence of H 2 O 2 . The peroxidase‐catalyzed oxidation of CA shows an optimum at an IAA concentration of 0.33 mM, while higher IAA concentrations are inhibitory. The observation that the oxidation of CA by cell wall peroxidase at the expense of IAA and O 2 is inhibited by genistein, a putative endogenous inhibitor of lignification in lupin hypocotyls, supports the view that the H 2 O 2 ‐generating system coexists with cell wall peroxidase activities involved in lignification, and that it takes place at the expense of IAA and O 2 .