Balasimha, D.Subramonian, N.2014-07-262014-07-261983Indian J.Expt.Biol. 1983 v-21 p-65-68http://hdl.handle.net/123456789/4413Effects of phenolic substances, o- and p-hydroxybenzoic acid (o- and p-HBA) were studied as synergists of indole-3-butyric acid (IBA) in rooting of single node cuttings of cacao. There was marked enhancement in rhizogenesis by p-HBA + IBA combination. The total pcroxidase and isoperoxidase activities were higher before rooting started and this declined enormously with onset of rooting. In rooting cuttings, the peroxidase activity was higher in treated cuttings as compared to controls. During rhizogenesis the auxin protector activity was higher in rooted than in non-rooted cuttings. The results are discussed in view of the regulatory role of peroxidases and auxin protectors. and auxin-phenol synneigism during rhizogenesis.enArticle