African Journal of
Biotechnology

  • Abbreviation: Afr. J. Biotechnol.
  • Language: English
  • ISSN: 1684-5315
  • DOI: 10.5897/AJB
  • Start Year: 2002
  • Published Articles: 12172

Full Length Research Paper

Effect of cutting position and indole butyric acid (auxin) concentration on rooting response of Araucaria heterophylla

Abera Tilahun
  • Abera Tilahun
  • Department of Dryland Forestry, Wondo Genet College of Forestry and Natural Resource, Hawassa University, Hawassa, Ethiopia. P. O. Box 128, Shashemene, Ethiopia.
  • Google Scholar
Begashaw Manahlie
  • Begashaw Manahlie
  • Department of Dryland Forestry, Wondo Genet College of Forestry and Natural Resource, Hawassa University, Hawassa, Ethiopia. P. O. Box 128, Shashemene, Ethiopia.
  • Google Scholar
Getachew Abebe
  • Getachew Abebe
  • Department of Dryland Forestry, Wondo Genet College of Forestry and Natural Resource, Hawassa University, Hawassa, Ethiopia. P. O. Box 128, Shashemene, Ethiopia.
  • Google Scholar
Genet Negash
  • Genet Negash
  • Department of Dryland Forestry, Wondo Genet College of Forestry and Natural Resource, Hawassa University, Hawassa, Ethiopia. P. O. Box 128, Shashemene, Ethiopia.
  • Google Scholar


  •  Received: 07 March 2018
  •  Accepted: 29 December 2018
  •  Published: 23 January 2019

Abstract

The effects of cutting position (tip, middle and basal) and concentration of indole butyric acid (IBA) (0, 5, 7.5 and 11 g/L) on root and shoot growth of Araucaria heterophylla were evaluated to develop a method for vegetative propagation for this tree species. Leaf number, number of adventitious roots, root length and survival rates were measured. These parameters were significantly influenced by the interactive effect of cutting position and hormonal concentration. Tip cuttings with the11 g/L IBA treatment showed higher root number, leaf number and root length whereas the other treatment combinations showed no root or shoot growth. Further, plant death was observed for the 5 and 7.5 g/L IBA treatments.

 

Key words: Araucaria heterophylla, cutting position, hormonal concentration, vegetative propagation.