title: Clonal propagation of Callistemon by tissue culture techniques.
abstract: Callus development in Callistemon viminalis was readily achieved when axillary buds derived from nodal tissue were placed in a medium containing macro- and micro-nutrients, sucrose (0.06 M), inositol (300 μM), nicotinic acid (20 μM), pyridoxine hydrochloride (3 μM), thiamine hydrochloride (2 μM), riboflavin (10 μM), cytokinins (5 μM) and auxins (0.1 μM). The presence of benzylaminopurine (5 μM) and p-chlorophenoxyacetic acid (0.1 μM) promoted the most vigorous callus development and sprout formation. Rooting of nodal material was rare but occurred readily following the transference of sprouts developed on callus to a basal medium containing sucrose and salts. Root initiation was stimulated, however, by the presence of auxins. Chlorophenoxyacetic acid while stimulating root initiation repressed root growth. Indole butyric acid stimulated both root initiation and shoot growth at concentrations of 0.005 to 0.1 μM. The treatment of choice for rooting and shoot growth was the addition of indole butyric acid at a concentration of 0.01 μM.
authors.affiliation: Department of Botany, James Cook University, 4811, Townsville, Australia.
authors.forename: W A
authors.initials: WA
authors.lastname: Shipton