Rooting and shoot growth of juvenile one-node leafy stem cuttings of T. africana were investigated after treatment with auxins Indol-3 butyric acid (IBA), α-naphthalene acetic acid (NAA) and IBA/NAA (1:1) all at four concentration levels (50ppm, 100ppm, 150ppm and 200ppm) including the auxin-free control (0ppm) and the leaf size effect. Rooting percentages varied among the three auxins, concentrations and even leaf size. Maximum rooting percentages were observed in full and half leaf cuttings treated with 200ppm IBA and half leaf cuttings treated with 150ppm IBA/NAA. The best auxin for root formation on T. africana stem cuttings was IBA/NAA (1:1) at a concentration of 200ppm. However, root elongation was best achieved by IBA at a concentration of 150ppm, with significant enhancement by full leaf cuttings. Contrary to rooting, shoot growth was enhanced by lower concentrations of auxins. It was also observed that shoot growth rate was highest in cuttings treated with IBA, with full leaf growing better than half leaf. Therefore, it was concluded that macro-propagation of T. africana stem cuttings can be obtained with the application of IBA or IBA/NAA.We present a new approach for front propagation at which the interface moves from a superconducting to normal region in a superconducting sample. Using the time dependent Ginzburg-Landau (TDGL) equations we study the interface propagation by constructing the exact solution for order parameter.

Keywords: auxins, rooting, concentration levels, leaf size, T. africana, stem cuttings

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