In vitro Root Induction of Curcuma sumatrana Miq. for The Successful Micropropagation of Sumatran Endemic Turmeric Species

Ma'ruf, Annisa Putri Amalia (2025) In vitro Root Induction of Curcuma sumatrana Miq. for The Successful Micropropagation of Sumatran Endemic Turmeric Species. S1 thesis, Universitas Andalas.

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Abstract

Curcuma sumatrana is an endemic plant species from Sumatra with various potential applications, particularly in the fields of medicine, food, and textiles. Due to its limited distribution in natural habitats and its classification as a vulnerable species by the IUCN, conservation efforts are urgently needed. One promising method is through plant tissue culture. In vitro root induction can enhance the plant’s ability to survive upon reintroduction into natural habitats. This study aimed to evaluate the effects of different concentrations of NAA combined with full- and half-strength Murashige and Skoog (MS) media on root induction of C. sumatrana. The experiment was arranged in a Completely Randomized Design (CRD) in factorial with 8 treatment and 5 replications. The culture media used were full-strength and half-strength MS supplemented with NAA at concentrations of 0, 0.25, 0.5, and 1 mg L⁻¹.The results showed that MS strength (full or half) did not significantly affect any observed parameter. However, NAA treatments at concentrations of 0.25–1 mg L⁻¹ tended to promote better root formation, with 0.25 mg L⁻¹ for leaf development. The longest roots were observed in the combinations of full-strength MS + 0.25 mg L⁻¹ NAA and ½ MS + 0 mg L-1 NAA. The highest survival rate (100%) during acclimatization was achieved under NAA concentrations of 0 and 0.25 mg L⁻¹ in both full- and half- strength MS media, as well as full-strength MS + 1 mg L⁻¹ NAA.

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