African Journal of
Agricultural Research

  • Abbreviation: Afr. J. Agric. Res.
  • Language: English
  • ISSN: 1991-637X
  • DOI: 10.5897/AJAR
  • Start Year: 2006
  • Published Articles: 6730

Full Length Research Paper

Effect of different plant growth regulators on callus induction in Catalpa bungei

Lin Juan1, Wu Lihua1, Liang jing1 and Wang Junhui2*
1State Key Laboratory of Genetic Engineering, Institute of Plant Biology, School of Life Sciences, Fudan University, Shanghai 200433, China. 2Research Institute of Forestry, Key Laboratory of Tree Breeding and Cultivation, State Forestry Administration, Chinese Academy of Forestry, Beijing 100091, China.
Email: [email protected]

  •  Accepted: 08 September 2010
  •  Published: 04 October 2010


The present study describes a reliable method for callus induction of Catalpabungei plant. Calli were in vitro initiated from leaves, stem and petiole segments using DKW basal media. The effect of combinations of BA (6-benzyl adenine) and NAA (α-naphthalene acetic acid) on callus induction was investigated. It was found that growth regulators and their concentrations have obvious effects on the callus induction, the increment of callus index and callus physical appearance. Moreover, callus was formed at different times among three kinds of explants that is, leaves, stem segment and petiole. The best callus induction capabilities were obtained with low levels of NAA in combinations with BA. However, supplemented medium with high concentrations of NAA led to relatively low callus frequency and the callus obtained turned to brown color. Generally, the highest frequencies of callus formation from leaves, stem and petiole explants were observed in the medium containing 0.05 mg l-1 of NAA and 5.0 mg l-1 of BA. However, petiole is the most potential explant for callus induction.


Key words: Catalpa bungei, tissue culture, plant growth regulators, callus.