Abstract
Different types and concentrations of plant growth regulators were tested in order to obtain the best callus and cell suspension culture growth conditions of Rollinia mucosa (Jacq.) Baill. (Annonaceae). Picloram was shown to be the most efficient for induction and production of friable calluses, independent of the concentration used. Cellular morphology and viability, fresh and dry weights, pH and medium sugar concentration were determined for cell suspension cultures. Dissimilation curves were used for the characterization of the growth of cell suspension cultures. Picloram provided the most rapid growth and produced the highest biomass, with little variation in morphology (differentiated cells). It also provided the highest dissimilation, when compared with cell suspension cultures maintained in media with 2,4-D or NAA + BA + GA3. Stable cell suspension cultures can be established in MS medium supplemented with 20.8 μM picloram.
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