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Cellular stages of root formation, root system quality and survival of Pinus elliottii var. elliottii x P. caribaea var. hondurensis cuttings in different temperature environments.

Rasmussen, A. and Smith, T.E. and Hunt, M.A. (2009) Cellular stages of root formation, root system quality and survival of Pinus elliottii var. elliottii x P. caribaea var. hondurensis cuttings in different temperature environments. New Forests, 38 (3). pp. 285-294.

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Article Link(s): http://dx.doi.org/10.1007/s11056-009-9147-6

Publisher URL: http://www.springerlink.com

Abstract

Time to first root in cuttings varies under different environmental conditions and understanding these differences is critical for optimizing propagation of commercial forestry species. Temperature environment (15, 25, 30 or 35 +/- A 2A degrees C) had no effect on the cellular stages in root formation of the Slash x Caribbean Pine hybrid over 16 weeks as determined by histology. Initially callus cells formed in the cortex, then tracheids developed and formed primordia leading to external roots. However, speed of development followed a growth curve with the fastest development occurring at 25A degrees C and slowest at 15A degrees C with rooting percentages at week 12 of 80 and 0% respectively. Cutting survival was good in the three cooler temperature regimes (> 80%) but reduced to 59% at 35A degrees C. Root formation appeared to be dependant on the initiation of tracheids because all un-rooted cuttings had callus tissue but no tracheids, irrespective of temperature treatment and clone.

Item Type:Article
Corporate Creators:DEEDI, QPIF
Additional Information:© Springer Science+Business Media B.V.
Keywords:Propagation; stem anatomy; root anatomy; callus; cuttings; cortex; abiotic; Pinus; axillary bud growth; auxin treatment; propagation temperature; shoot development.
Subjects:Forestry > Sylviculture
Science > Botany
Deposited On:09 Apr 2010 03:29
Last Modified:29 Sep 2010 01:36

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