Vegetative propagation of Almaciga [Agathis dammara (Lamb.) L.C. Rich]
1994
Palaypayon, C.A.M.
On shoot formation, treatment with 250 ppm IBA + 250 ppm NAA yielded the highest number of cuttings (15). Control ranked next (7 cuttings); then treatments with 500 and 1250 ppm NAA (6 cuttings each), followed by 1250 ppm IBA (4 cuttings), 500 ppm IBA (3 cuttings) and the least was Hormex (2 cuttings). Based on the results obtained, a combination of IBA and NAA at 250 ppm level of concentration could be a better treatment to enhance root formation as evidenced by the formation of callus at the base of the cuttings. In the second experiment, two levels of the rooting hormones, 250 and 500 ppm IBA and NAA were used as treatments. Aside from rooting hormone, two other factors: misting and chamber were used to determine their effects on the propagation of almaciga cuttings. Results showed that rooting hormone, chamber and misting significantly increased survival and callus formation of almaciga cuttings. Among the nine treatments, namely: Control (T1), 250 ppm NAA (T2), 500 ppm NAA (T3), 250 ppm IBA (T4), 250 ppm IBA + 250 ppm NAA (T5), 250 ppm IBA + 500 ppm (T6), 500 ppm IBA (T7), 500 ppm IBA + 250 ppm NAA (T8), and 500 ppm IBA + 500 ppm NAA (T9), T1 yielded the most number of cuttings that survived after four months (18 or 24 percent), followed by T3 (7 or 9 percent), T2 (6 or 8 percent), and T4, T5 and T6 (1 or 1 percent). The rest (T7, T8 and T9) had no cuttings that survived. The Duncan's Multiple Range Test (DMRT) showed that the control significantly increased the survival and callus formation on almaciga cuttings. Survival and callus formation or initiation took place after 4 months in the rooting bed. These results were due to the effect of chamber, misting and rooting hormones
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