Journal article
Relationships between indole-3-butyric acid, photoinhibition and adventitious rooting of Corymbia torelliana, C. citriodora and F1 hybrid cuttings
Tree and Forestry Science and Biotechnology, Vol.2, pp.26-33
2008
Abstract
Rooted cuttings propagation is widely used for maximising tree yield, quality and uniformity in conjunction with clonal selection. Some eucalypt species are deployed as rooted cuttings but many eucalypts, such as the spotted gums (e.g. Corymbia citriodora), are considered too difficult-to-root to be produced as cuttings. This study examined IBA effects on photoinhibition, root formation, mortality, and root and shoot development of cuttings of C. torelliana, C. citriodora and their widely-planted F1 hybrids. IBA had little or no effect on photoinhibition but it had strong, dose-dependent effects on root formation and mortality. IBA frequently increased primary root number of rooted cuttings but it did not increase total root weight, length, surface area or volume, possibly because the highest dose (8 g IBA/kg powder) caused leaf abscission and sometimes reduced leaf area (by 55-79%) or shoot dry weight (by 40-58%). An intermediate dose (3 g IBA/kg powder) most consistently improved root formation with little or no effect on mortality or shoot development. Across the F1 hybrid families, this treatment increased the number of rooted cuttings by 72-121% and more than doubled the number of primary roots per rooted cutting (from 1.1-1.7 roots to 3.5-4.1 roots). This simple treatment will facilitate commercial multiplication of superior individuals or selected families of C. torelliana × C. citriodora through a vegetative propagation system.
Details
- Title
- Relationships between indole-3-butyric acid, photoinhibition and adventitious rooting of Corymbia torelliana, C. citriodora and F1 hybrid cuttings
- Authors
- Stephen J Trueman (Author) - University of the Sunshine Coast - Faculty of Science, Health and EducationD M Richardson (Author) - Department of Primary Industries and Fisheries
- Publication details
- Tree and Forestry Science and Biotechnology, Vol.2, pp.26-33
- Publisher
- Global Science Books, Ltd.
- Date published
- 2008
- ISSN
- 1752-3753
- Copyright note
- Copyright © 2008 Global Science Books, Ltd. The published version is reproduced here in accordance with the publisher's copyright policy.
- Organisation Unit
- School of Science and Engineering - Legacy; University of the Sunshine Coast, Queensland; GeneCology Research Centre - Legacy
- Language
- English
- Record Identifier
- 99449751702621
- Output Type
- Journal article
Metrics
100 File views/ downloads
906 Record Views