Stem Anatomy and Adventitious Root Formation in Cuttings of Angophora, Corymbia and Eucalyptus

Philippa H Bryant; Stephen J Trueman

doi:10.3390/f6041227

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Stem Anatomy and Adventitious Root Formation in Cuttings of Angophora, Corymbia and Eucalyptus

Journal article

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Stem Anatomy and Adventitious Root Formation in Cuttings of Angophora, Corymbia and Eucalyptus

Philippa H Bryant and Stephen J Trueman

Forests, Vol.6(4), pp.1227-1238

2015

DOI: https://doi.org/10.3390/f6041227

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Abstract

auxin

clonal forestry

eucalypts

morphology

nursery

propagation

rooting

tissue culture

Many plantation eucalypts are difficult to propagate from cuttings, and their rooted cuttings often possess very few adventitious roots. We microscopically examined the stem anatomy of cuttings from 12 species of eucalypts and we determined whether adventitious root formation in auxin-treated cuttings of four species was limited to particular positions around the vascular tissue. Most species contained a central pith that was arranged in a four-pointed stellate pattern. The surrounding vascular tissue was also arranged in a stellate pattern near the shoot apex but it developed a more rectangular shape at the outer phloem as the stems enlarged radially. Adventitious roots formed at, or slightly peripheral to, the vascular cambium, and they formed at both the corners and the sides of the rectangular-shaped vascular tissue. The study highlighted that auxin-treated eucalypt cuttings can produce roots at multiple positions around the vascular tissue and so propagation methods can aim to produce more than four adventitious roots per rooted cutting. Higher numbers of adventitious roots could improve the root system symmetry, stability, survival and growth rate of clonal eucalypt trees.

Details

Title: Stem Anatomy and Adventitious Root Formation in Cuttings of Angophora, Corymbia and Eucalyptus
Authors: Philippa H Bryant (Author) - University of the Sunshine Coast - Faculty of Science, Health, Education and Engineering
Stephen J Trueman (Author) - University of the Sunshine Coast - Faculty of Science, Health, Education and Engineering
Publication details: Forests, Vol.6(4), pp.1227-1238
Publisher: MDPI AG
Date published: 2015
DOI: 10.3390/f6041227
ISSN: 1999-4907
Copyright note: Copyright © 2015 by the authors; licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution license (http://creativecommons.org/licenses/by/4.0/).
Organisation Unit: School of Science and Engineering - Legacy; University of the Sunshine Coast, Queensland; GeneCology Research Centre - Legacy
Language: English
Record Identifier: 99449211202621
Output Type: Journal article

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