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Micropropagation of Sumatra Benzoin is potential to provide good-quality seed for future preservation of the forest and improve the incense sap production. The production of Styrax plants is currently limited by the availability of seed. This research demonstrated the micropropagation of Sumatra Benzoin (Styrax benzoin Dryander), producing good-quality saplings that could be used for obtaining nontimber forest products. Elite mother plant was selected and used as a source of explants. Identification of healthy trees was carried out based on the phenotype criteria, and the selection of a mother plant was performed through information on the quality and quantity production of incense sap. Micropropagation started from callus induction in young leaves followed by subculture to obtain regeneration of shoots and roots. The combination of NAA and BAP in the culture media greatly affected the growth and development of callus, shoots, and roots. The use of 3 mg/L NAA and 3 mg/L NAA rendered the heaviest calli. Shoots were regenerated with 0.5 mg/L NAA and 3.0 mg/L BAP, and the highest growth of roots was obtained by using of 3.0 mg/ NAA without BAP. This research reports the first in vitro propagation technique for Styrax benzoin. Further research is underway to obtain very good-quality plant saplings to be used for forest conservation and to increase the production of incense sap as a nontimber forest commodity.

Plant Regeneration through Callus Cultures from Leaf Explant of Sumatra Benzoin (Styrax benzoin)