Preparation and characterization of the tissue culture of spruce (Picea excelsa Link)

The paper describes isolation and partial characterization of the tissue culture of the common spruce (Picea excelsa Link). The tissue culture was grown on the medium ofHarvey (1967) modified by increasing the concentration of 2,4-dichlorophenoxyacetic acid (2,4-D) to l mg l^?1 and by omitting the tyrosine. By selective 10-month subculturing the tissue culture was obtained possessing relatively stable properties and giving good yields of biomass. The tissue of the callus was of yellowish colour, compact and homogenous. The obtained tissue culture was characterized by its growth curve and by following the O₂ consumption during the growth.