A comparison of callus induction in 4 Garcinia species

BackgroundThis research is intended to determine suitable types and concentrations of plant growth regulators (PGRs) to induce callus on stem and leaf sections of 4 species of the genus Garcinia, namely, Garcinia mangostana, Garcinia schomburgkiana, Garcinia cowa, and Garcinia celebica. The base medium was MS medium containing 30 g l^-1 sucrose, 0.5 g l^-1 polyvinylpyrrolidone (PVP), and 7 g l^-1 agar, and for the different treatments, PGRs were added to the medium as follows: thidiazuron (TDZ) at concentrations of 0, 0.1, 0.5, 1, and 2 mg l^-1; 6-(3-hydroxybenzylamino) purine (meta-topolin) at concentrations of 0, 0.5, 2.5, and 5 mg l^-1; 4-amino-3,5,6-trichloro-2-pyridinecarboxylic acid (picloram) at concentrations of 0, 0.5, 2.5, and 5 mg l^-1; and 2,4-dichlorophenoxyacetic acid (2,4-D) at concentrations of 0, 0.5, 1, 2, and 4 mg l^-1. The occurrence of callus was observed after 4 weeks.ResultsA maximum of 100% and 93% of G. mangostana leaf explants formed callus in the 0.5 mg l^-1 and 1 mg l^-1 TDZ treatments, respectively, while 100% of G. schomburgkiana stem explants formed callus in the 1 mg l^-1 TDZ treatment and 89% of G. schomburgkiana leaf explants formed callus in the 0.5 mg l^-1 picloram treatment. The highest callus induction rate for G. cowa was 62% in the 1 mg l^-1 TDZ treatment and for G. celebica was 56% in the 0.5 mg l^-1·mT^-1 treatment.ConclusionsFor all 4 species, the greatest amount of large nodular callus was observed in the TDZ treatments. White, friable callus was observed on most of the 2,4-D and picloram treatment groups. Most meta-topolin treatments resulted in minimal callus formation.How to cite: Suwanseree V, Phansiri S, Yapwattanaphun C. A comparison of callus induction in 4 Garcinia species. Electron J Biotechnol 2019;40. https://doi.org/10.1016/j.ejbt.2019.04.006