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Indole-3-butyric acid accelerates adventitious root formation and impedes shoot growth of Pinus elliottii var. elliottii × P. caribaea var. hondurensis cuttings

Hunt, M. A., Trueman, S. J. and Rasmussen, A. (2011) Indole-3-butyric acid accelerates adventitious root formation and impedes shoot growth of Pinus elliottii var. elliottii × P. caribaea var. hondurensis cuttings. New Forests, 41 (3). pp. 349-360. ISSN 01694286 (ISSN)

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Article Link(s): http://doi.org/10.1007/s11056-010-9227-7

Publisher URL: http://www.scopus.com/inward/record.url?eid=2-s2.0-79956153020&partnerID=40&md5=407734351c72bfa7fb372cf71ca687ae

Abstract

Many plantation tree species are cloned to achieve the growth, disease resistance and wood quality characteristics required for a successful economic venture. However, clonal propagation is limited by declines in adventitious root formation with increasing stock plant age. We examined the effects of immediate or delayed IBA application on adventitious root formation and subsequent root and shoot development of cuttings harvested from 8-year-old clonal hedge plants of Pinus elliottii var. elliottii × P. caribaea var. hondurensis. IBA applied at the time of setting accelerated root formation, elevating the percentage of cuttings with roots at 13 weeks post-setting from 45 to 78% and from 83 to 93% for a low- and a high-rooting clone, respectively. Final rooting percentages for the same treatments and clones (78 and 85%, and 88 and 100%, respectively, at 20 weeks post-setting) were not significantly affected by IBA application. IBA increased the root:shoot ratio of rooted cuttings by decreasing shoot weight compared with untreated cuttings, without affecting root weight, root length, root surface area or root volume. IBA was only effective when applied at the time of setting. A simple IBA treatment for cuttings from 8-year-old clonal hedges, by accelerating root production, has potential for reducing nursery costs and increasing the root system quality of containerised pine cuttings. © 2010 Springer Science+Business Media B.V.

Item Type:Article
Keywords:Auxin Callus Plant growth regulators Propagation Root growth Shoot growth Butyric acid Cloning Fatty acids Fences Forestry Plants (botany) Value engineering clonal growth coniferous tree cost-benefit analysis growth regulator inhibitor plantation forestry root system root-shoot ratio Auxins Clones Plants Resistance Pinus elliottii var. elliottii
Subjects:Science > Botany
Plant culture > Propagation
Forestry > Research. Experimentation
Forestry > Forestry management
Deposited On:27 Mar 2019 22:16
Last Modified:27 Mar 2019 22:16

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