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All Journal Biosaintifika: Journal of Biology & Biology Education Asian Journal of Agriculture
Amalia Indah Prihantini, Amalia Indah
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Agriculture, Biological Sciences & Forestry

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Various antioxidant assays of agarwood extracts (Gyrinops versteegii) from West Lombok, West Nusa Tenggara, Indonesia PRIHANTINI, AMALIA INDAH; RIZQIANI, KANTI DEWI
Asian Journal of Agriculture Vol 3 No 01 (2019)
Publisher : Society for Indonesian Biodiversity & Universitas Mulawarman, Samarinda, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13057/asianjagric/g03101

Abstract

Abstract. Prihantini AI, Rizqiani K. 2019. Various antioxidant assays of agarwood extracts (Gyrinops versteegii) from West Lombok, West Nusa Tenggara, Indonesia. Asian J Agric 3: 1-5. However, the species have not been widely explored as a source of natural products in particular antioxidant agents, which protect cells from damage caused by free radicals. The present study was aimed to evaluate antioxidant activities of agarwood extracts from West Nusa Tenggara using various antioxidant assays. The antioxidant activity of leaf, fruit and fruit bark extracts were investigated based on DPPH radicals scavenging activity, reducing power, and β-carotene bleaching assays. The total phenolic content was also investigated. The result showed that leaf extract revealed the strongest antioxidant activity on all assays performed such as DPPH radicals scavenging activity (IC50 22.13±0.71 μg/mL); reducing power (251.85±0.03 mg QE/g dry extract); and β-carotene bleaching activity (IC50 24.23±2.60 μg/mL). The total phenolic content (TPC) in the leaf was higher (184.90±0.76 mg GAE/g dry extract) than fruit bark and bark extracts. The high content of phenolic compounds in G. versteegii leaves indicated that these compounds might contribute to the antioxidant activities. In conclusion, these findings showed that G. versteegii leaves are potential for development as an antioxidant source.
The Best Inoculation Technique Applied on Gyrinops versteegii Tree Trunk Wahyuni, Resti; Prihantini, Amalia Indah
Biosaintifika: Journal of Biology & Biology Education Vol 12, No 2 (2020): August 2020
Publisher : Department of Biology, Faculty of Mathematics and Sciences, Semarang State University . Ro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/biosaintifika.v12i2.25128

Abstract

Agarwood is a non-timber forest product having high economic value, however, its population in nature is getting decrease. Gyrinops versteegii, an agarwood-producing plant, has been listed in Appendix II CITES, therefore, exploitation of the agarwood in nature must be reduced. An effort to reduce the agarwood exploitation the nature is by agarwood cultivation including cultivation of agarwood-producing plant and agarwood inoculation. Some of agarwood inoculation methods are simpori and implant techniques. Simpori is a modified inoculation method using porous nail and Fusarium solani, meanwhile implant technique uses drill and pieces of wood that is soaked in F. solani spores. The present study aimed to determine the best inoculation technique applied to G. versteegii tree trunk at 4 to 5m height, comparing simpori and implant techniques. This study used completely randomizes design with two treatments (simpori and implant techniques). The result showed that the averages yield of production agarwood produced by simpori and implant techniques are 0.66 and 0.64%, respectively. Based on SNI 7631:2011, the visual quality of the produced agarwood belongs to kemedangan TG.C. In conclusion, both simpori and implant technique produced agarwood in similar quality and quantity at six months inoculation, however, simpori is more practical for application in the field. This study provides additional data about agarwood produced by simpori and implant technique and give the alternative methods for agarwood farmers producing their agarwood themselves.
Co-Authors Resti Wahyuni RIZQIANI, KANTI DEWI