Journal article
Ageing delays the cellular stages of adventitious root formation in pine
Australian Forestry, Vol.73(1), pp.41-46
2010
Abstract
Vegetative propagation programs internationally are affected by the significant decline of rooting success as trees mature. This study compared the cellular stages of root formation in stem cuttings from 15-week-old (juvenile) and 9-y-old (mature) stock plants of the slash × Caribbean pine hybrid (Pinus elliottii var. elliottii × P. caribaea var. hondurensis). The cellular stages of root formation were the same in both juvenile and mature cuttings, beginning with cell divisions of the vascular cambium forming callus tissue. Within the callus, tracheids differentiated and elongated to form root primordia. Roots in juvenile cuttings developed faster than those in mature cuttings and the juvenile cuttings had a much higher rooting percent at the end of the study (92% and 26% respectively). Cuttings of the two juvenile genotypes had more primary roots (5.5 and 3.3) than the three mature genotypes (0.96, 0.18 and 0.07). The roots of juvenile cuttings were more evenly distributed around the basal circumference when compared with those on cuttings from the mature genotypes. Further work is needed to improve understanding of physiological changes with maturation so that the rooting success and the speed of development in cuttings from mature stock plants can be optimised, hence improving genetic gain.
Details
- Title
- Ageing delays the cellular stages of adventitious root formation in pine
- Authors
- A Rasmussen (Author) - University of QueenslandMark A Hunt (Author) - University of the Sunshine Coast - Faculty of Science, Health and Education
- Publication details
- Australian Forestry, Vol.73(1), pp.41-46
- Publisher
- Institute of Foresters of Australia
- Date published
- 2010
- DOI
- 10.1080/00049158.2010.10676308
- ISSN
- 0004-9158
- Copyright note
- Copyright © 2010 Institute of Foresters of Australia. The published version is reproduced here in accordance with the publisher's copyright policy.
- Organisation Unit
- University of the Sunshine Coast, Queensland
- Language
- English
- Record Identifier
- 99449858402621
- Output Type
- Journal article
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- Domestic collaboration
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- Forestry
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