Ferrer M A, Pedreño M A, Muñoz R, Barceló A R
Department of Plant Biology (Plant Physiology), University of Murcia, Spain.
FEBS Lett. 1990 Dec 10;276(1-2):127-30. doi: 10.1016/0014-5793(90)80524-m.
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 O2, and in the absence of H2O2. 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 O2 is inhibited by genistein, a putative endogenous inhibitor of lignification in lupin hypocotyls, supports the view that the H2O2-generating system coexists with cell wall peroxidase activities involved in lignification, and that it takes place at the expense of IAA and O2.
木质素前体松柏醇（CA）被细胞壁过氧化物酶氧化可能以吲哚 - 3 - 乙酸（IAA）和O₂为代价发生，且无需过氧化氢（H₂O₂）。CA的过氧化物酶催化氧化在IAA浓度为0.33 mM时显示出最佳效果，而较高的IAA浓度具有抑制作用。染料木黄酮是羽扇豆下胚轴中假定的木质化内源性抑制剂，它抑制了以IAA和O₂为代价的细胞壁过氧化物酶对CA的氧化，这一观察结果支持了以下观点：产生H₂O₂的系统与参与木质化的细胞壁过氧化物酶活性共存，并且它以IAA和O₂为代价发生。
