Callus Induction from Various Organs of Dragon Fruit, Apple and Tomato on some Mediums

Background and Objective: Dragon fruit (Hylocereus spp.), apple (Malus sylvestris Mill.) and tomato (Solanum lycopersicum L.) are high potential sources of antioxidant compounds such as phenolics. The compounds have the capability of protecting cells and tissues against free radicals. Secondary metabolite produced by callus cell culture from plant organs also acts as a source of antioxidants. This study aimed to determine the optimal ratio of sucrose and 2,4-D in Murashige and Skoog (MS) medium for callus induction from different plant organ explants. With all of characteristic, callus can be used further for the development of natural cell regeneration agent. Methodology: This study was conducted using analytical technique. Suitable explants were obtained. They were developed in various concentrations of combination between MS medium and 2,4-D. Callus growth, including their weight and surface was then measured and analyzed by using one-way analysis of variance (ANOVA). Results: Callus was able to grow from its explants in 5-7 days after induction process. They were clear in color and had friable texture. The highest value of fresh weight of dragon fruit callus was obtained through MS supplemented with 1 μL L¹ 2,4-D and 30 g sucrose. However, apple and tomato callus induction and growth maintenance reached optimal medium on MS supplemented with 30 g sucrose and 2 μL L¹ 2,4-D. Conclusion: Callus of apple, dragon fruit and tomato was maintained upon MS supplemented with 30-40 g sucrose and 1-2 μL L¹ 2,4-D for optimum induction and growth. The optimization of growth medium will give advantages for further development of natural cell regeneration agent.

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