Rhizocaline, Rooting Co-factors, and the Concept of Promoters and Inhibitors of Adventitious Rooting - A Review |
| |
Authors: | WILSON P J; STADEN J VAN |
| |
Institution: | U.N./F.R.D. Research Unit for Plant Growth and Development, Botany Department, University of Natal Box 375, Pietermaritzburg 3200, South Africa |
| |
Abstract: | In many studies, reviewed in this paper, eluates of separatedplant extracts and various known endogenous and exogenous substanceshave promoted or inhibited adventitious rooting when appliedto stem cuttings. Some of the promoters are thought to act inconcert with auxin (the co-factors) and include various phenolics. The mode of action of most rooting promoters and inhibitorsis obscure. There is no good evidence that rhizocaline, theoriginally postulated root-forming hormone, consists of an auxin-phenolicconjugate, and other explanations for the action of phenolicsare not well substantiated. It is suggested that the action of many rooting promoters andinhibitors is mediated by chemical injury. Irrespective of theirchemical identity, sublethal concentrations promote rooting,while higher concentrations are inhibitory. Rhizocaline, co-factors, promoters, inhibitors, adventitious rooting |
| |
Keywords: | |
本文献已被 Oxford 等数据库收录! |
|