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HAYATI Journal of Biosciences

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Published by Institut Pertanian Bogor

ISSN : 19783019 EISSN : 20864094 DOI : -

Core Subject : Science, Agriculture,

Agriculture, Biological Sciences & Forestry Earth & Planetary Sciences

HAYATI Journal of Biosciences (HAYATI J Biosci) publishes articles and short communication in tropical bioscience fields such as development, biotechnology, biodiversity and environmental issues. HAYATI J Biosci covers wide range of all life forms topics including virus, microbes, fungi, plants, animal and human. HAYATI J Biosci has been also indexed/registered in Crossref, DOAJ, CABI, EBSCO, Agricola and ProQuest.

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Articles 1,077 Documents

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Amplified Fragment Length Polymorphism Diversity of Cultivated White Oyster Mushroom Pleurotus ostreatus Muhammad Jusuf
HAYATI Journal of Biosciences Vol. 17 No. 1 (2010): March 2010
Publisher : Bogor Agricultural University, Indonesia

Amplified fragment length Polymorphism (AFLP) analysis was performed to study the genetic diversity of fifteen isolates of white oyster mushroom (Pleurotus ostreatus) originated from different places in Indonesia (Java, Sumatra, Bali, and Kalimantan) and Thailand. The majority of studied isolates originated from commercial mushroom, and some of them were collected from nature. AFLP analysis revealed 202 loci of positive DNA bands. Heterozygosity value showed polymorphisms of the fifteen studied isolates. Correlation and cluster analyses of the isolates showed that isolate from Thailand (BNK isolate), isolate from Bogor (AMD isolate), and isolate from Purwokerto (USX isolate) were distinctly different from the other isolates indicated by positive bands with DNA size greater than 650 bp. Isolate from Kalimantan (BJM isolate) was distinctly different from Java island isolates. Generally there was no correlation of AFLP variability and geographic distribution of commercial strain isolates.

Quality of Epididymal and Ejaculated Sperms of Spotted Buffalo in Dextrose Supplemented Extender . Yulnawati; Muhammad Gunawan; Hera Maheshwari; Muhammad Rizal; . Herdis; Arief Boediono
HAYATI Journal of Biosciences Vol. 17 No. 1 (2010): March 2010
Publisher : Bogor Agricultural University, Indonesia

Quality of epididymal and ejaculated sperms of spotted buffalo in three different extenders (i.e. Andromed, Andromed supplemented with 0.2% dextrose, and Andromed supplemented with 0.4% dextrose) was studied. The results showed that there was no significantly different (P > 0.05) quality of ejaculated and epididymal sperms. The motility percentage of post thawing epididymal and ejaculated sperms was 41-46% and 41-45%, respectively. And percentage of cytoplasmic membrane integrity of the post thawing epididymal and ejaculated sperms was 66-67% and 47-54% respectively. There was also no significant different (P > 0.05) in the percentage of cytoplasmic membrane integrity between the extenders of both ejaculated and epididymal sperms. This result suggested that epididymal sperms were reliable for artificial insemination as good as ejaculated sperms.

Inhibition of Urokinase-Type Plasminogen Activator Expression by Macelignan in Porphyromonas gingivalis Supernatant-Induced Human Oral Epithelial Cells . Yanti
HAYATI Journal of Biosciences Vol. 17 No. 1 (2010): March 2010
Publisher : Bogor Agricultural University, Indonesia

This study was to investigate the effect of macelignan on Porphyromonas gingivalis supernatant-induced uPA expression via regulating mitogen-activated protein kinase (MAPK) and activating protein-1 (AP-1) signaling pathways in human oral epithelial KB cells using casein zymography, Western blotting, reverse transcription-PCR and reporter gene assays. Zymographic analysis of secreted enzymes identified the main caseinolytic band at 54 kDa. Macelignan inhibited the expression of uPA protein and mRNA, as well uPA secretion, in KB cells exposed to P. gingivalis supernatant. Consistent with these findings, macelignan suppressed phosphorylation of p38 and c-Jun N terminal kinase (JNK) in P. gingivalis supernatant-induced KB cells. The levels of c-Fos and phosphorylated c-Jun, which together form AP-1, the transcription factor that is involved in uPA gene expression, were partially reduced by macelignan. Macelignan also blocked P. gingivalis supernatant-induced AP-1 activity in these cells. These results suggest that macelignan decreased P. gingivalis supernatant-induced uPA expression by blocking AP-1 activity, which may be mediated by inhibition of phosphorylation of p38 and JNK in KB cells. Macelignan may potently use for the modulation of periodontal inflammation.

Diversity and Effectiveness of Insect Pollinators of Jatropha curcas L. (Euphorbiaceae) Puji Rianti; Bambang Suryobroto; Tri Atmowidi
HAYATI Journal of Biosciences Vol. 17 No. 1 (2010): March 2010
Publisher : Bogor Agricultural University, Indonesia

Seed of Jatropha curcas (Euphorbiaceae) is currently established as the source for biofuel Therefore, it is important to understand the diversity insects that pollinated J. curcas inflorescence yellow flowers. We also aimed to study the pollination effects on fruit set on J. curcas. Scan sampling method were carried out to explore the insect pollinators diversity from 07.00 up to 17.00 h in every 15 minutes. Visiting frequency of pollinators insects were observed by using focal sampling. Those information together with flowering periods, flower nectar volumes, and environmental factors were used as the basic data to determine the effectiveness of insect pollination both in covered and uncovered of seed set plants. Results showed that nine species of insect pollinators were from three order (Hymenoptera, Lepidotera, and Diptera) pollinated J. curcas. Four species of Hymenoptera i.e. Prenolepis, Apis dorsata, Xylocopa confusa, and Apis cerana showed the highest abundances. The highest abundance and species richness of pollinators occurred at 08.00-10.15 and 15.00-17.15 h. Bees of X. confusa, A. cerana, and A. dorsata of Apidae are effective as insect pollinators in J. curcas plantations, due to high visited frequencies. The insect pollinators also increased fruits and seeds set of J. curcas in the uncovered experiment plants. Thereby, enhancement the three pollinator insects as part of crop management have to be considered by farmers.

Fecal Steroid Profile of Female Javan Gibbons (Hylobates moloch) Maintained in Pairing-Typed Cage Hera Maheshwari; Luthfiralda Sjahfirdi; Pudji Astuti; Bambang Purwantara; Hadi Sukardi Alikodra; Dondin Sajuthi; Reviany Widjajakusuma
HAYATI Journal of Biosciences Vol. 17 No. 1 (2010): March 2010
Publisher : Bogor Agricultural University, Indonesia

Estrone conjugate (E1C) and pregnanediol glucuronide (PdG) were predominant steroid metabolites of estrogen and progesterone in feces of most primates and could be used to evaluate ovarian function. These metabolites were determined along with records of genital swelling throughout 3-4 months period from three female Javan Gibbons (Hylobates moloch) maintained in pairing-typed cage at Schmutzer Primate Center, Jakarta (Ullah) and at Taman Margasatwa Taman Sari, Bandung (Donna and Citah). Following methanolic extraction of lyophilized fecal powder, samples were analyzed using enzyme linked immunosorbent assay (ELISA) for E1C and PdG. In all of the three females observed, both hormone profiles did not indicate any regular cycle of ovarian function even though genital swellings were sometimes observed. In one female (Donna) the hormone patterns showed clear signs of cycle irregularities with extended luteal phase of 40 days and erratic pattern of follicular phase. Of the other two females, no ovarian cycle was found. The data indicate that the fecal steroids analysis is a practical and valuable diagnostic tool for providing reliable information on ovarian function in Javan Gibbon. Factors affected reproductive hormonal profile should be taken in consideration in trying to achieve success in captive breeding program for this species.

Single Strand Conformation Polymorphism Method for Initial Detection DNA Sequences Homogeneity Topik Hidayat; Adi Pancoro
HAYATI Journal of Biosciences Vol. 17 No. 1 (2010): March 2010
Publisher : Bogor Agricultural University, Indonesia

In molecular phylogenetic study, homogeneity of DNA sequences is a prerequisite before putting it into practice. Internal transcribed spacer (ITS) region of nuclear ribosomal DNA (nrDNA) has been common in phylogenetic study, but a homogenous sequence is often difficult to obtain. Here we use single-stranded conformation polymorphism (SSCP) method to detect homogeneity for nine pooled amplified products of ITS region. Our results suggested that SSCP method has been applicable in detection homogeneity of ITS region prior to using it in sequencing processes.

Effect of Mamordica charantia L. Powder on Antioxidant Superoxide Dismutase in Liver and Kidney of Diabetic Rats TUTIK WRESDIYATI; TEGUH SURANTA SINULINGGA; YOLI ZULFANEDI
HAYATI Journal of Biosciences Vol. 17 No. 2 (2010): June 2010
Publisher : Bogor Agricultural University, Indonesia

The status of antioxidant superoxide dismutase (SOD) was reported decreased in the liver tissues of diabetic experimental Macaca fascicularis. This study observed effect of Mamordica charantia on the status of SOD in the liver and kidney of diabetic experimental rats. The SOD was localized using immunohistochemical technique. Male Wistar rats of negative control and diabetes mellitus (DM) group treated with 5 and 10% of M. charantia powder for 28 days. The DM condition was achieved by alloxan (110 mg/kg BW) induction. Charantia powder increased the status of antioxidant SOD in the liver and kidney of diabetic experimental rats. Aplication of M. charantia powder 10% gave better results than that of 5%. The results suggested that M. charantia powder can increase the status of antioxidant in the oxidative stress condition, such as diabetes mellitus.

Cloning of araA Gene Encoding L-Arabinose Isomerase from Marine Geobacillus stearothermophilus Isolated from Tanjung Api, Poso, Indonesia DEWI FITRIANI; BUDI SAKSONO
HAYATI Journal of Biosciences Vol. 17 No. 2 (2010): June 2010
Publisher : Bogor Agricultural University, Indonesia

L-arabinose isomerase is an enzyme converting D-galactose to D-tagatose. D-tagatose is a potential sweetener-sucrose substitute which has low calorie. This research was to clone and sequence araA gene from marine bacterial strain Geobacillus stearothermophilus isolated from Tanjung Api Poso Indonesia. The amplified araA gene consisted of 1494 bp nucleotides encoding 497 amino acids. DNA alignment analysis showed that the gene had high homology with that of G. stearothermophilus T6. The enzyme had optimum activity at high temperature and alkalin condition.

Partial Purification of Antimicrobial Compounds Isolated from Mycelia of Tropical Lentinus cladopus LC4 LISDAR IDWAN SUDIRMAN
HAYATI Journal of Biosciences Vol. 17 No. 2 (2010): June 2010
Publisher : Bogor Agricultural University, Indonesia

Lentinus cladopus LC4 produced at least eight antimicrobial compounds (ACs) which are active against plant and human pathogens. Three ACs in its crude mycelial were extracted with methanol and partial purification was carried out with silicic acid column chromatography and by thin layer chromatography (PTLC). The antimicrobial activity was tested by paper disc method and antibiographic method. The chromatography purification eluted with dichloromethane containing 5% methanol gave one active fraction (FII). This fraction which was active against X. campestris pv. glycines and showing two inhibition zones against Bacillus subtilis on bioautographic plates with the Rfs 0.8 and 0.7. FI and FIII fractions eluted with dichloromethane containing 0 and 10% methanol performed one inhibition zone with Rfs 0.8 and 0.7 respectively. However, their activities were lower than that of FII fraction. The PLTC purification gave one separate fraction with Rf value of 0.73 and it was active against X. campestris pv. glycines. The compound of Rf 0.73 fraction should be further studied using TLC and HPLC to obtain the pure substance for molecule characterization.

Morphological Characteristics of Ectomycorrhizas on Merbau [Intsia bijuga (Colebr.) O. Kuntze] JULIUS DWI NUGROHO; IRDIKA MANSUR; AGUS PURWITO; ENDANG SUHENDANG
HAYATI Journal of Biosciences Vol. 17 No. 2 (2010): June 2010
Publisher : Bogor Agricultural University, Indonesia

Merbau [Intsia bijuga (Colebr.) O. Kuntze] is one of valuable timber tree in south-east Asia which has been known having ectomycorrhizae (EcM) though being ignored. Identification of the ectomycorrizae is prime important for being basis of further studies. This study investigated the EcM fungi associated with Merbau by using both sporocarp morphology and EcM morphotypes. Morphological characters of sporocarps and basidiocarps of the fungi and EcM morphotypes obtained from seedlings and trees from natural and plantation stands of merbau, as well as from nurseries were compared to the description of those resulted from baiting method. Only one species of ectomycorrhizal fungus was found associated with merbau [Intsia bijuga (Colebr.) Kuntze] which has not been described yet. The fungus formed mycorrhizae with monopodial pinnate branching. The fungus was identified belonging to the genus of Scleroderma. The fungus was more common to occur beneath merbau seedlings than trees. The sporocarps may be yielded under greenhouse condition and could be cultured in MMN agar media, thus it facilitates to the production of inoculums used for further studies.

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