Effects of IBA on rooting characteristics and changes in the relevant oxidases during rooting of Scaevola crassifolia

Present study investigated the effects of IBA on Scaevola crassifolia rooting and relevant oxidases. The dynamics of activity of peroxidase (POD), super oxide dismutase (SOD), catalase (CAT), polyphenol oxidase (PPO) and indole acetic acid oxidase (IAAO) during rooting were studied with random block experiment. The results showed that rooting type of S. crassifolia was the phloem. When its cutting was treated by IBA at a suitable concentration, rooting rate and the quality of root system could be significantly enhanced. Activity of related oxidative enzyme of S. crassifolia varied regularly during the cutting. The activity of POD and SOD and PPO increased gradually after cutting and reached a peak during the formation of root system and then decreased gradually. The activity of CAT and IAAO showed a trend in which it decreased firstly and then increased and reached a minimum value during the formation of root system.