In vitro regeneration of plantlets from nodal explants of Aristolochia saccata and Aristolochia cathcartii

Bhaskar Sarma, Bhaben Tanti


In vitro propagation of Aristolochia saccata and A. cathcartii were carried out using nodal explant. In both the plants, nodal explants showed direct somatic embryogenesis when cultured on MS medium using various concentrations of BAP (1.0-4.0) and 2iP (1.0-4.0) separately or in combination with low concentration (0.5 and 1.0 mg l-1) of auxin (NAA). It was observed that BAP in combination with NAA was more effective for shoot induction than the hormones used separately. Among different combinations of NAA and BAP, 3.0 mg/l BAP + 1.0 mg/l NAA showed better response in case of A. saccata of about 96%, whereas, in A. cathcartii, the best response was achieved in 4.0 mg/l BAP + 0.5 mg/l NAA after 28 day of culture and 88.3% explants showed proliferation in this combination. The auxins NAA and IBA were used singly to induce rooting from in vitro raised shoot lets. A range of concentration was tested (0.1, 0.5, 0.8 and 1.0 mg/l) for rooting. In the present study 1/2 strength MS basal medium and the two different auxins (NAA and IBA) were tried, the maximum results on rooting were obtained on half strength with IBA (0.5 mg/l) then NAA.


Aristolochia saccata; A. cathcartii; In vitro regeneration; Nodal culture; MS medium

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