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Journal of Biological Sciences

Year: 2016 | Volume: 16 | Issue: 5 | Page No.: 155-166
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Authors

E.T.S. Putra

Issukindarsyah

Taryono

B.H. Purwanto

D. Indradewa

Keywords

Research Article

Induction of Biochemical Resistance of Oil Palm Seedlings to Drought Stress Using Boron and Silicon Applications

E.T.S. Putra, Issukindarsyah, Taryono, B.H. Purwanto and D. Indradewa
Objective: The objectives of the study were to determine (1) The level of biochemical resistance to drought stress on oil palm using boron (B) and silicon (Si) applications and (2) The mechanism of B and Si actions in the induction of biochemical resistance of oil palm seedlings to drought stress. Materials and Methods: Field trial was arranged in the Randomized Complete Block Design (RCBD) factorial using three blocks as replications. The first factor was the dose of B, namely 0.00, 0.17, 0.44, 0.87, 1.31 and 1.75 g per seedling. The second factor was the dose of Si, namely 0.00, 1.15, 2.31, 3.46 and 4.69 g per seedling. The observations were done on the contents of proline and total phenolic compound, total antioxidant, H2O2 activities, dry weight, trunk height and diameter. The data were analysed using analysis of variance (ANOVA) and the means were separated using Duncan’s Multiple Range Test (DMRT) at 5% level. Meanwhile, the optimum dose of B and Si were determined using regression analysis. Results: The accumulations of proline in leaf tissue reach a maximum at 0.81 g of B per seedling. The application of 1.75 g of B per seedling was significantly able to maximize the rate of total phenolic compound accumulation, total antioxidant activity and inhibit H2O2 activity. On the other hand, the application doses of Si that able to maximize the rate of proline accumulation, total phenolic compound and total antioxidant activity were 1.15, 0.73 and 2.82 g per seedling, respectively. Hydrogen peroxide activity begins to compress when the application dose of Si was more than 4.29 g per seedling. Conclusion: The application of B and Si were able to induce biochemical resistance of the oil palm seedlings to drought stress through the accumulations of proline and total phenolic compound, increase of the total antioxidant activity and inhibition of H2O2 activity.
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