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Journal of Tropical Biodiversity and Biotechnology

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Published by Universitas Gadjah Mada

ISSN : 25409573 EISSN : 25409581 DOI : -

Core Subject : Science, Agriculture, Social,

Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Environmental Science Immunology & microbiology

Journal of Tropical Biodiversity and Biotechnology (JTBB) is an authoritative source of information concerned with the advancement of tropical biology studies in the Southeast Asia Region. It publishes original scientific work related to a diverse range of fields in tropical biodiversity, functional biology, and biotechnology.

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Articles 5 Documents

Search results for , issue "Vol 2, No 2 (2017): December" : 5 Documents clear

Kandungan Fenolik, Flavonoid dan Aktivitas Antioksidan Ekstrak Daun Paku Laut (Acrostichum aureum L.) Fertil dan Steril di Kawasan Mangrove Kulon Progo, Yogyakarta Naovi Nur Fadia Hanin; Rarastoeti Pratiwi
Journal of Tropical Biodiversity and Biotechnology Vol 2, No 2 (2017): December
Publisher : Universitas Gadjah Mada

Sea Fern (Acrostichum aureum L.), which typically grows in mangrove ecosystem, has two distinguished leaves which are fertile leaves (rich in spores) and sterile leaves (no spores). Those leaves are known rich in phenolic compounds. Flavonoids, moreover, which belong to class of phenolic compound, have antioxidant activity. This study aims were to analyze the phenolic content, flavonoid content, and antioxidant activity of fertile leaves, sterile leaves, and spores of sea fern which grow in mangrove ecosystem that is located in Kulon Progo, Yogyakarta. Leaf and spore samples were extracted using ethanol solvent. Then, total content of phenol and flavonoid were measured by spectrophotometry, while the antioxidant activity was measured by DPPH method. The results showed that the phenolic content of fertilized leaves and sterile leaves did not show a significant difference. In other hand, the spores sample showed highest both of flavonoids content (2.32 mg/mL) and the antioxidant activity with the IC50 value was 23.25 ppm. Thus, the ethanolic extracts of spores of sea fern sterile leaves showed the highest flavonoid content and could be categorized as a very strong antioxidant.

Flower-Insect Visitor Interaction: Study Case on Rhododendron inundatum Sleumer in Bali Botanic Garden Farid Kuswantoro
Journal of Tropical Biodiversity and Biotechnology Vol 2, No 2 (2017): December
Publisher : Universitas Gadjah Mada

The Rhododendron-insect relationship was quite well studied in the northern hemisphere. However, information on the flower-insect relationship of the Indonesian Rhododendron was limited. This study aims to find the interaction between Rhododendron inundatum Sleumer collected in Bali Botanic Garden and its flower-visiting insect. The study was conducted by observing insect visitation to the flower of R. inundatum for 1 hour a day and repeated for nine days. Data analysis was conducted by calculating the Visitation Rate (VR) of each visitor taxa to determine its frequency. Study result showed that R. inundatum in Bali Botanic Garden was visited mainly by Chrysopa sp., as well as members of the Vespidae, Curculionidae, Muscidae, Drosophilidae, and Tephritidae. The result of this study was dissimilar with the previous study of white-flowered Rhododendron, which was mainly visited by moths.

Potensi Aktinomisetes Asal Tanah Perakaran Mangrove Segara Anakan Cilacap Sebagai Penghasil Antifungi Terhadap Yeast Patogen Candida albicans Rifqi Aulia Akbar; Dini Ryandini; Dyah Fitri Kusharyati
Journal of Tropical Biodiversity and Biotechnology Vol 2, No 2 (2017): December
Publisher : Universitas Gadjah Mada

Isolation of actinomycetes has been done from mangrove soil sample of Segara Anakan Cilacap. This research aimed to know the potency of actinomycetes as an antifungal producer, and to measure antifungal activity produced by actinomycetes based on diameter zone inhibition and to know the characteristic of the bioactive compound with Thin Layer Chromatography method. The result of the study has been isolated 24 actinomycetes isolates, 15 of them had potential as an antifungal producer, which inhibited the growth of Candida albicans. Period of fermentation significantly affected to the activity of the antifungal compound. The highest inhibitory zone was formed by an antifungal extract from actinomycetes C with a range zone 19.7 mm in length at 14th days fermentation, which was extracted with ethyl acetate solvent (1: 1 v / v). The characteristic of a bioactive compound of the actinomycetes C ha s a Rf value 0.5 in the solvent n-butanol, acetic acid and water (3: 2: 1 v / v / v).

The Effect Of Cadmium on Sperm Quality and Fertilization Of Cyprinus carpio L. Alfiah Hayati; Khusnita Giarti; Yuli Winarsih; Muhammad Hilman Fuadil Amin
Journal of Tropical Biodiversity and Biotechnology Vol 2, No 2 (2017): December
Publisher : Universitas Gadjah Mada

The objective of the study was to determine the effect of cadmium on sperm quality and fertilization of C. carpio L. Sperm and eggs were collected by abdomen striping from the mature testis and ovary of C. carpio L. This study used one control and four treatment groups of variation on the cadmium concentration (0, 50, 100, 150, and 200 ppm) with eight replications. Sperm motility (mass motility, mass motility duration, and individual motility duration) and viability were measured after three to four seconds of incubation in the water. The percentage of fertility success was calculated by observing embryo development after the eggs were mixed with sperm and incubated in the water for 72 hours. The success of the fertilization process was indicated by a color change of the egg that darkens after successful fertilization, and white-milk if failed. The data were analyzed using analysis of variance (α = 0.05). The results of this study indicate that exposure of 50 ppm cadmium and control group shown success in term of sperm quality (motility and viability) and fertilization, but at 100 ppm or more decreased the sperm quality and fertilization rate. It can be concluded that cadmium exposure decreases sperm quality and fertility at 100 ppm or higher concentrations.

Variasi Morfologis Udang Galah (Macrobrachium rosenbergii de Man, 1879) Hasil Inbreeding dan Outbreeding Populasi Probolinggo dan Mahakam Nurul Suwartiningsih; T. Trijoko; Niken Satuti Nur Handayani
Journal of Tropical Biodiversity and Biotechnology Vol 2, No 2 (2017): December
Publisher : Universitas Gadjah Mada

Indonesia has high biodiversity, one of them is the diversity of giant freshwater prawn (Macrobrachium rosenbergii de Man, 1879). The giant freshwater prawn was easy to reproduce and has high nutritional value. This study was conducted to determine the morphological variation of inbreed and outbreed of Probolinggo and Mahakam (Mama, Gogo, Goma, and Mago) populations that was developed in Unit Kerja Budidaya Air Payau Balai Budidaya Udang Galah (UKBAP BBUG) Samas as a basic for seed selection. Research of morphological variation carried out by observing 12 morphological characters, four meristic characters and 52 morphometric characters in four populations. Analysis of basic morphometric characters using a statistical program to determine the linear regression and the significance of parameters. Analysis of morphological characters using a statistical program to make dendrogram showing the similarity of four populations. The result of morphometry shows that the ratio of cephalothorax and abdomen of Mago and Goma is lower than Mama and Gogo. When viewed from the ratio of the carapace and rostrum length, Mago produces the longest rostrum. So, when only carapace length is compared to abdomen length, Mago showed the greatest value. Gogo has the highest ratio of cephalothorax and abdomen, while Mago has the highest ratio of carapace and abdomen among populations. Morphological data analysis showed that Gogo and Goma had reached 76% similarity, Goma and Mama have a similarity of 68% while Mago has 52% similarity with another three populations.

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