Tuber of Amorphophallus paeoniifolius (Dennst.) Nicolson (Araceae), known as suweg, has been reported having low Glycemic Index. Therefore it has potential to be developed as a functional food. However, limited supply of propagation material of suweg has been one of the constraints in developing suweg as functional food. Suweg can be propagated using conventional methods using seed, tuber, rachis, as well modern method such as tissue culture. Study on rooting stimulation in suweg rachises cutting using plant growth regulator Naphthalene Acetic Acid (NAA) was carried out in Bogor Botanic Garden’s nursery. The purpose of this study was to find the best source of rachises cutting as well as the best dose of NAA which will gives the best effect of the seedlings. The treatment was laid out in factorial design with a Completely Randomized Design (CRD) comprises of two factors. The First factor was NAA dose which consisted of four levels: 0 ppm (control), 10 ppm, 20 ppm and 30 ppm. The Second factor was the rachises cutting which consisted of R1, R2 and R3. Parameters assessed were rachises cutting survival percentage, number of roots, root length, plant height, leaflets length, leaflets width, leaf diameter, petiole diameter and tuber diameter. The results showed that treatment combinations were not significantly different for all parameters. The best result for rachises cutting was shown by R2 treated with 20 ppm NAA which had survival percentage more than 80% at 16 weeks after planting. R1 and R3 showed 60% –70% of survival percentage at16 weeks after planting, respectively.
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