Journal article
Improved Root Formation in Eucalypt Cuttings Following Combined Auxin and Anti-ethylene Treatments
Journal of Plant Sciences, Vol.7(4), pp.138-153
2012
Abstract
Improved vegetative propagation methods are needed for eucalypt hybrids because demand for eucalypt hybrids is often greater than their seed supply and it can be difficult to produce adventitious roots on eucalypt cuttings. This study examined the timing of adventitious root formation in cuttings of two eucalypt hybrids, Corymbia torellianaxCorymbia citriodora and Eucalyptus pellitaxEucalyptus grandis and determined the effects of combining Indole-3-butyric Acid (IBA) with an ethylene inhibitor, 1-methylcyclopropene (MCP) or aminoethoxyvinylglycine (AVG), on rooting, defoliation and death of cuttings. Root initiation commenced within 14 days, well before the main phases of cutting defoliation and death. IBA often increased rooting percentage or the number of adventitious roots per rooted cutting. IBA also increased defoliation and death of Corymbia cuttings in one experiment, but AVG alleviated these effects and increased the percentage of cuttings that formed roots. The combined IBA and MCP or AVG treatments frequently increased cutting production and root system quality. Combining IBA (8 g kg-1) with MCP (400 nl L-1) or AVG (125 mg L-1) raised the number of Corymbia rooted cuttings by 83 and 206%, respectively and the number of Eucalyptus rooted cuttings by 46 and 110%, respectively. These Corymbia plants possessed 2.2 and 2.6 more adventitious roots and the Eucalyptus plants possessed 1.0 and 1.1 more adventitious roots, on average, than untreated cuttings. The rooting percentages obtained with optimal treatments (30-42 and 29-59% for Corymbia and Eucalyptus, respectively) allow hybrid deployment through clonal propagation. The combination of an auxin rooting hormone with an ethylene inhibitor is a novel and effective treatment for improving vegetative propagation of eucalypt hybrids.
Details
- Title
- Improved Root Formation in Eucalypt Cuttings Following Combined Auxin and Anti-ethylene Treatments
- Authors
- Amanda J Kilkenny (Author) - University of the Sunshine Coast - Faculty of Science, Health, Education and EngineeringHelen M Wallace (Author) - University of the Sunshine Coast - Faculty of Science, Health, Education and EngineeringDavid Walton (Author) - University of the Sunshine Coast - Faculty of Science, Health, Education and EngineeringMatthew F Adkins (Author) - AgroFresh Inc.Stephen J Trueman (Author) - University of the Sunshine Coast - Faculty of Science, Health, Education and Engineering
- Publication details
- Journal of Plant Sciences, Vol.7(4), pp.138-153
- Publisher
- Academic Journals Inc.
- Date published
- 2012
- DOI
- 10.3923/jps.2012.138.153
- ISSN
- 1816-4951
- Copyright note
- Copyright © 2012 Academic Journals Inc. Published version of this paper reproduced here in accordance with the copyright policy of the publisher.
- Organisation Unit
- School of Science and Engineering - Legacy; University of the Sunshine Coast, Queensland; GeneCology Research Centre - Legacy
- Language
- English
- Record Identifier
- 99450045402621
- Output Type
- Journal article
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