Effect of Paclobutrazol on the Growth of Cassava (Rayong 86-13) under Tissue Culture for Greenhouses Transplanting
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Abstract
The objective of this experiment is to effects of paclobutrazol on the growth of cassava (Rayong 86-13) under tissue culture for seedling preparation, as well as the growth after transplantation to the greenhouse at the Rayong Field Crops Research Center. This experiment was designed as a CRD with 4 replications. The experimental factors were 5 levels of paclobutrazol (PBZ) concentrations: 0, 4, 8, 12, and 16 ppm. It was found that when cassava seedlings were grown in medium supplemented with paclobutrazol (PBZ) for 14 days and then grown in normal root induction medium. The average percentage of seedling survival at 7 days after transplantation at paclobutrazol (PBZ) concentrations of 0, 4, 8, 12, and 16 ppm were 100, 94, 92, 86, and 83 percent, respectively, but there was not significantly difference . When the height was 56 days of transplantation, the method that not previously treated with PBZ had the highest height, which was 3.98 centimeters, and when transplanted into a greenhouse from 14-56 days after transplanting. The PBZ concentrations of 4 and 8 ppm gave the highest height growth, with the heights at 56 days after transplanting being 8.98 and 8.89 cm, respectively. At 90 days, the samples were weighed fresh and dry (tree and root parts). It was found that all treatments were not significantly different. Therefore, adding paclobutrazol at a concentration of 4 ppm to the root induction medium for 14 days before transplanting into the normal root induction medium will enhance the growth of seedlings in the greenhouse.
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