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Cellular stages of root formation, root system quality and survival of Pinus elliottii var. elliottii × P. caribaea var. hondurensis cuttings in different temperature environments
journal contribution
posted on 2023-05-18, 12:43 authored by Rasmussen, A, Smith, TE, Mark HuntMark HuntTime 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 ± 2°C) had no effect on the cellular stages in root formation of the Slash × 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 25°C and slowest at 15°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 35°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.
History
Publication title
New ForestsVolume
38Pagination
285-294ISSN
0169-4286Department/School
School of Natural SciencesPublisher
Kluwer Academic PublPlace of publication
Van Godewijckstraat 30, Dordrecht, Netherlands, 3311 GzRights statement
Copyright 2009 Springer Science+Business Media B.VRepository Status
- Restricted