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Articles by Anizan Isahak
Total Records ( 2 ) for Anizan Isahak
  Che Radziah Che Mohd Zain , Ahsan A. Kadhimi , Arshad Naji Alhasnawi , Anizan Isahak , Azhar Mohamad , Febri Doni and Wan Mohtar Wan Yusoff
  Background and Objective: Aromatic rice MRQ74, known as Maswangi is an important rice variety in Malaysia. However, drought tolerance is essential for the growth of MRQ74. This study was conducted by exposing naked seeds to acute gamma radiation to induce callus embryogenesis. Methodology: A dose response experiment was performed at the Nuclear Malaysia Agency to expose the naked MRQ74 seeds to 350 Gy; these seeds were cultured to produce callus on Murashige and Skoog (MS) media supplemented with 2,4-D, (1.0, 2.0 or 3.0 mg L–1) and Kin (0.1 and 0.2 mg L–1) for 4 weeks. Under the optimized conditions in media and regeneration, the callus was introduced to drought stress with 1.5, 3, 4.5, 6 and 7% PEG (MW 6000). Results: The most efficient response to callusing was found at 3 mg L–1 2,4-D and 0.1 mg L–1 kinetin. Shoot and root formation were respectively optimized in MS+3.0 mg L–1 (BAP)+0.1 mg L–1 (NAA) and MS+1.0 mg L–1 (IBA)+0.1 mg L–1 2,4-D. The highest fresh weight of callus and increase in proline enzyme concentrations were obtained through acute gamma radiation at 7% PEG strength. Conclusion: This study successfully establishes a novel potential mutant line as an improved drought-tolerant MRQ74 variant. Further research should be conducted to investigate the nutrient properties and yield of this novel mutant.
  Abdullahi Ahmed Chinade , Chamhuri Siwar , Shaharuddin Mohamed Ismail and Anizan Isahak
  Carbon sequestration in forest soils is considered important for mitigation of carbon dioxide from the atmosphere and for improving forest health and land productivity. The measurement of soil carbon stock is also necessary for carbon inventory and calibration of carbon simulation models. Mitigation of carbon dioxide (CO2) (the main Green-House Gas (GHG)) in the atmosphere can be accomplished by either reducing its emission or by sequestering it in biomass and in soil. Malaysia’s large forested area, estimated at 17.7 M ha, offers an opportunity for carbon sequestration in soil. The forest ecosystem of Peninsular Malaysia alone, is reported to contain 23.48 Million tonnes of Carbon (or 86.17M to CO2 equivalent) and a carbon sequestration potential of 4 tonnes of carbon ha-1 year-1. However, this estimate excludes soil carbon stock despite the fact that the soil carbon component accounts for 36-46% of the total carbon in the forest ecosystem. This study reviews the opportunities and challenges facing carbon sequestration in Malaysian forest soils.
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