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BERITA BIOLOGI

berita_biologi
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Published by Lembaga Ilmu Pengetahuan Indonesia

ISSN : - EISSN : - DOI : -

Core Subject : Science, Agriculture,

Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology

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Articles 40 Documents

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Search results for , issue "Vol 9, No 6 (2009)" : 40 Documents clear

UPAYA DOMESTIKASI TANGKASI(Tarsius spectrum) MELALUI OPTIMALISASI PEMBERIAN PAKAN SECARA GRADUAL DAL AM PENANGKARAN Kiroh, Hengki J
BERITA BIOLOGI Vol 9, No 6 (2009)
Publisher : Research Center for Biology-Indonesian Institute of Sciences

This research was conducted to change natural feeding behavior of Tarsius (Tarsius spectrum) using fresh life insect into fresh meal material as new introducing feeding material by gradually optimal feeding system in wire netting pen.This research was focused on preference of Tarsius into fresh meal as new introducing feeding material and nutrient consumption.Result showed that Tarsius was able to be interested in different fresh meal as new introducing feeding material within relatively short time and to be adaptable on different nutrient consumption. Therefore, it can be concluded that (1) domesticating process of Tarsius was able to change their natural feeding behavior using fresh life insects into fresh meal material as new introducing feeding within 27 day; (2) Average nutrient consumption of Tarsius for new introducing feeding varied one to each other in wire netting pen.

PENGARUH NAUNGAN TERHADAP PERTUMBUHAN BIBIT PULAI {Alstonia scholaris (L.) R.Br) Juhaeti, Titi
BERITA BIOLOGI Vol 9, No 6 (2009)
Publisher : Research Center for Biology-Indonesian Institute of Sciences

Pulai {Alstonia scholaris (L.) R.Br famili Apocynaceae} is one of the prospective plants due to its multipurpose such as for construction, medicine and handicraft. It is known that pulai can be propagated by seed, cutting or grafting. To have the best performance of seedling in the nursery, we have to study many aspects. One of that aspect is shading tolerance of pulai seedling. This research was conducted to study the effect of 0, 25, 50 and 75% shading on the growth of pulai seedling. The result showed that the best growth of pulai seedlings is on the 0% shading. But in 25-50% shading the growth of pulai seedling are still in good performance, while in 75% of shading the growth have been decreased.

PERFORMA BAKTERIPADATANAH TERCEMAR PESTISIDA Rahmansyah, Maman; Sulistinah, Nunik
BERITA BIOLOGI Vol 9, No 6 (2009)
Publisher : Research Center for Biology-Indonesian Institute of Sciences

Preliminary study on bacterial survive in soil containing pesticide has been carried out. Soil samples collected from Lembang and Dieng. The soil deprive from agriculture area that intensively using pesticide, and compared to other samples gathered from forest soil. All samples examined for total bacteria, denitrification bacteria, phosphate solubilizing bacteria, soil induce respiration, urease and phosphatase activities. Pattern of whole parameters in each soil sample configured similarly, but the value performed differently in the same parameters. Total bacterial population in soil samples also inspected after the samples amended with some certain pesticides. Survival bacteria subjected to media amended with insecticide (Propoxur, Diazinon, and Chlorpyrifos), and herbicides (Bromacil and 2,4-D), and correlation of bacterial growth between sample location were varied. Bacterial degrading pesticide particularly isolated from the soil samples containing 1000 ppm Curzate (fungiside) and 500 ppm 2,4-D.The isolates then cultured in the medium containing insecticide and herbicide, and the response on growth observed in 7 days incubation. Bacterial perform were meaningful to reference of soil degrading pesticide residue in agriculture soil; and it would make representative reference in an effort to use bacteria throughout biofertilizer improvement.

BIOLOGI BIJI GEWANG {Corypha utan Lamarck): KERAGAMAN KANDUNGAN EMBRIO, KIMIA DAN PERANAN MIKROBA DALAM PROSES PERKECAMBAHAN BIJI Naiola, BP; Nurhidayaf, N
BERITA BIOLOGI Vol 9, No 6 (2009)
Publisher : Research Center for Biology-Indonesian Institute of Sciences

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14203/beritabiologi.v9i6.855

A laboratory study in 2007 on seed physiology of gewang/talipot palm {Corypha utan Lamarck) - by splitting down the seeds by liquid nitrogen technique, revealed that not all seeds - only 20% - bearing mature embryos. Those embryos are highly protected by robust endocarp and endosperm. A further study was done to reconfirm the previous result, found that seed bearing embryo from 3 different ecotypes of gewang in East Nusa Tenggara (NTT) shows a relatively high diversity in seed bearing embryo originated from different ecotypes, ranging from 16 to 57%. Embryolessness seeds is assumed as due to the antagonistic interaction between GA, (gibberellic acid) and ABA (abscisic acid) during embryogenesis. Chemical content of seeds also shows relatively high in carbohaydrate and protein, while lipids were relatively low. Microbes identified as Fusarium and Bacillus was found in the surface of endocarp; Fusarium shows a more capability to decompose the endocarp of gewang seeds, thus allowed imbibition process, which lead to seed germination. Although Fusarium known as a soil borne disease for plants, their roles in endocarp/testa decomposition is important and needed by gewang to proceed seed germination. While the coming seedling of gewang may develop probably an internal resistance against Fusarium.

NEGATIVE IMPACT OF FOREST DEGRADATION TO HERPETOFAUNA SPECIES RICHNESS IN KERINCISEBLAT NATIONAL PARK, SUMATRA [Dampak Negatif dari Degradasi Hutan Terhadap Kekayaan Jenis Herpetofauna di Taman Nasional Kerinci Seblat, Sumatra] Kurniati, Hellen
BERITA BIOLOGI Vol 9, No 6 (2009)
Publisher : Research Center for Biology-Indonesian Institute of Sciences

Habitat loss and fragmentation are among the largest threats to herpetofauna diversity in tropical rain forest areas, including the rain forest in Kerinci Seblat National Park (KSNP). To measure the rate of negative impact to the herpetofauna population,fifteen survey sites with several degree of habitat disturbance were selected. Based on cluster analysis,15 survey sites were grouped into five distinct clusters, included low elevation forest group, high elevation group, swamp group, disturbed forest group and cultivated land group. Calculation of linier regression for four major (low elevation forest group, high elevation group, disturbed forest group and cultivated land group groups) showed that the rate of locally biodiversity losses were high (R2 > 0.7).

PERAN PEMUPUKAN POSFOR DALAM PERTUMBUHAN TANAMAN JAGUNG (Zea mays L.) DI TANAH REGOSOL DAN LATOSOL FahmF, Arifin; Syamsudin, Syamsudin; Utami, Sri Nuryani H; Radjagukguk, Bostang
BERITA BIOLOGI Vol 9, No 6 (2009)
Publisher : Research Center for Biology-Indonesian Institute of Sciences

Phosphorus (P) is an essential element for plants, deficiency and excess of P in soil will limit plant growth. It is required toÂ applicate P fertilizer in appropriate dosage for promoting plant growth on the soil with different properties. The purpose ofÂ experiment was to study the respon of maize (Zea mays L.) for phosphorus fertilization on Regosol and Latosol soils. A glassÂ house experiment was conducted to study maize response on P fertilizer application in Regosol and Latosol soils. The treatmentÂ 1was 0, 112, 336, 1008, 3024 and 9072 kg superfosfat ha . P fertilizer tend to increase the biomass of maize but exceed of PÂ fertilizer reduced maize biomass. The optimum fertilization and vailability of P for plant affected by soil properties.

Stappia aggregata Gl DAN Alteromonas sp.G2 BAKTERIPENDEGRADASI PHENANTRENE YANG DIISOLASIDARI LINGKUNGAN LAUT Supriyati, Dyah
BERITA BIOLOGI Vol 9, No 6 (2009)
Publisher : Research Center for Biology-Indonesian Institute of Sciences

Stappia aggregata Gl and Alteromonas sp. G2 are marine bacteria isolated from Kepulauan Seribu waters, Jakarta. These bacteria were isolated using ONR7a media, and forming clear zone surrounding grown colonies after 48 hours, and able to grow on phenantrene as the sole carbon sources. After 4 hours incubation phnenantrene was degraded, and almost 12 hours about 60% of phenantrene was converted. The two strains performed similar biodegradation pattern, but different in growth characteristic.Bacteria Stappia aggregata Gl and Alteromonas sp. G2 grew optimum at 30Â°C, pH 8 and 3% salinity.

AKTIVITAS FOSFATASE TANAH DILINGKUNGAN BENTANG HUTAN ALAMI DAN NON-ALAMI Suliasih, Suliasih; Rahmansyah, Maman
BERITA BIOLOGI Vol 9, No 6 (2009)
Publisher : Research Center for Biology-Indonesian Institute of Sciences

The spatial dispersal of acid and alkaline phosphates activity in forest soils appears to be controlled by position in the landscape and its soil microbial density. Soil bacteria expressively produced significant level of acid phosphatase in the investigation.The variety of acid phosphatase activity (8.25-37.55 />-nitrophenol.g"soil.h") noted higher and followed by alkaline (0.78-7.15 p-nitrophenol.g-soil.h" ), correspondingly. Acid and alkaline phosphates were exist in both of soil of natural as well as for non-natural forest soil landscape, with the value (po/o=0.6210) of correlation are 0.6889 and 0.6532, respectively. Phosphate Solubilizing Bacteria (PSB) average density in natural forest soil equivalent to 0.61xl0Ã colony forming unit (cfu) and total bacteria is 160xl0 cfu, while the PSB in non-natural forest soil is 7.75xl0 cfu and total bacteria is 48.25x10 cfu. Concerning to the forest environment as soil bacteria inhabitants of PSB, there were significantly difference of PSB population in natural and non-natural landscape forest. Forest environment is negatively affect the soil enzymes activities under Pinus maritima and Caliandra calothyrsus as the lowest activities, and to the highest ones under the Schima wallichii and Eucalyptus saligna vegetation.

PENGARUH MINYAK ATSIRI SERAI (Andropogon citratus DC.) TERHADAP BAKTERI YANG DIISOLASIDARISAPI MASTITIS SUBKLINIS Poeloengan, Masniari
BERITA BIOLOGI Vol 9, No 6 (2009)
Publisher : Research Center for Biology-Indonesian Institute of Sciences

This study was done to determine the antibacterial properties of water extract and volatile oil of lemon grass (Andropogon citratus DC).Bacteria isolates used in this study were obtained from subclinical mastitis ridden cows and had been identified as Staphylococcus aureus, S. epidermidis, Streptococcus agalactiae and E. coli. The concentrations of water extract and volatile oil used for the test were %, 25%, 12,5% and 6,25%. The antibacterial used was done by paperdisk diffusion method on Mueller Hinton Agar (MHA). The result showed that water extract did not have any antibacterial effect to 4 bacteria isolates., while volatile oil of lemon grass did inhibit the growth of 4 bacteria isolates.Increasing concentration of volatile oil resulted in increasing zone of bacteria growth inhibition.

PENGGUNAAN PACLOBUTRAZOLDAN ABA DAL AM PERBANYAKAN X NENAS SIMADU MELALUI KULTUR IN VITRO Purnamaningsih, Ragapadmi; Mariska, Ika; Supriati, Yati
BERITA BIOLOGI Vol 9, No 6 (2009)
Publisher : Research Center for Biology-Indonesian Institute of Sciences

Pineapple (Ananas comosus L. Merr.), represents an important crop in Subang. Somaclonal variation is one of the problem to develop pineapple, especially Simadu variety. Probability to conduct Simadu progeny from the mother plant is very low (5%).Its caused by chimeric of the somatic cells that form meristem.In vitro culture is the alternative method to solve the problem by using the meristem cells from Simadu fruit as explant. Unfortunately, genetic diversity has been observed in many spesies during tissue culture.This phenomenon is usually termed somaclonal variation. Many studies on pineapple demonstrsted that some in vitro propagated materials differ from the source materials from which they are derived.To minimize genetic variability, the use of growth inhibitor such as paclobutazol and absisic acid hopefully would gave the important role in genetic stability. The aim of the research is to multiply Simadu pineapple by using tissue culture technic. In vitro shoot induce from crown of the Simadu fruit until get the sterile shoots. Combination of kinetin (0-5 ppm) with paclobutrazol ( 0-0.1 ppm) or ABA (0-1 ppm) was used in the multiplication stage. Result showed that there are no interaction between kinetin and paclobutrazol or ABA, but there is influence of the single factor. Kinetin increase leave number but decrease plant height and root number. Paclobutrazol increase shoot and leave number, but decrease plant height and root number. There is no influence of ABA to plant height, shoot and root number but decreased leaves number.

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