IAA-peroxidase relation in the microsporocytes and anther wall during successive stages of meiosis in Larix europaea L.

Abstract

During anther meiosis in <em>Larix europaea</em> considerable variations in the level of peroxidase activity and endogenous auxin content occur both in the microsporocytes and in the anther wall. However, the IAA-peroxidase relations are different in each of these two parts of the anther. In the anther wall characterized by the occurrence of anodic isoperoxidases, the changes in peroxidae activity show a positive correlation with those in endogenous auxin content. In the microsporocytes containing almost only cathodic asoperoxidases the levels of endogenous auxin content and peroxidase activity show a reverse correlation. Thus a preponderance of isoperoxidases showing IAA-oxidase properties occur only in the microsporocytes. These results suggest the important role of the IAA=peroxidase system in the mechanism of differentiation of cells undergoing anther meiosis.