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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 2,125 Documents

73 74 75 76 77

PENGARUH ATONIK TERHADAP PERTUMBUHAN TUNAS PADA TURUS AKAR SUKUN (ARTOCARPUS ALTILIS (PARKINS.) FOSB.) FACHRUROZI, Z.; HARAHAP, R.
BERITA BIOLOGI Vol 3, No 1 (1985)
Publisher : Research Center for Biology-Indonesian Institute of Sciences

Z. FACHRUROZI & R. HARAHAP 1985. The effect of atonic solutions on the growth of bread fruit (Artocarpus altilis (Park) Fosbere). Berita Biologi 3 (1)12-15, -A study on the application of atonic solution as the stimulating agent on the growth of bread fruit suckers indicated that the solution containing of 250 ppm and 500 ppm respectively are significantly increased the numbers as well as speeded up the growth of the 15 cm length suckers. The possibility to use these solutions on the suckers less than 15 cm length is discussed.

SANDALWOOD AS A COMPONENT OF AGROFORESTRY: EXPLORATION OF PARASITISM AND COMPETITION WITH THE WANULCAS MODEL Noordwijk, Meine van; Wawo, Albert Husein; Lusiana, Betha; Roshetko, Jim
BERITA BIOLOGI Vol 5, No 5 (2001)
Publisher : Research Center for Biology-Indonesian Institute of Sciences

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14203/beritabiologi.v5i5.1462

Sandalwood is an important component of agroforestry systems in the drier Eastern parts of Indonesia, although its value to farmers is still limited by existing policies and regulation of marketing. As a relatively slow growing root parasite, sandalwood will interact with other components in a complex pattern of competition and host-parasite relationships, depending on root distribution and rooting depth of potential hosts. We describe a number of modifications to the generic tree-soil-crop simulation model WaNuLCAS, that allow exploration of the transition between parasitism and competition. The key variable in this transition is the effectiveness of formation of the parasitic link for all situations where roots of the host and parasite occur in the same volume of soil. At low values of this effectiveness competition dominates, at higher values sandalwood will weaken the host, until it effectively kills it, leading to an optimum response of sandalwood to the effectiveness parameter. Unresolved questions in the formulation of the model are the lifespan of parasitized roots and the question whether or not sandalwood will allocate energy resources for maintenance respiration of host roots after the formation of haustoria. The'desk study' reported here was intended to focus subsequent field studies on these unresolved issues.

TIGA SPESIES PERONOSCLEROSPORA PENYEBAB PENYAKIT BULAI JAGUNG DI INDONESIA Rustiani, Ummu S.; Sinaga, Meity S.; Hidayat, Sri Hendrastuti; Wiyono, Suryo
BERITA BIOLOGI Vol 14, No 1 (2015)
Publisher : Research Center for Biology-Indonesian Institute of Sciences

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14203/beritabiologi.v14i1.1860

Downy mildew is very detrimental disease of maize production in Indonesia. Adequate information regarding the identification key based on morphological and morphometric characteristic of the causal fungi of maize downy mildew in Indonesia is limited. Study for detection and identification of morphological, morphometric, and moleculer base is urgently required. Artificial sporulation induction method performed to obtain the morphology of the fungus as a whole.The fungi were morphologically identified as symptomatic maize downy mildew collected from 13 provinces in Indonesia.Three species, namely P. maydis, P.sorghi, and P. philippinensis were identified based on the shape,size, and conidial cell wall thickness, size and number of branching coniodiophores, and long sterigmata.Confirmation by PCR succesfully amplified target DNA of P. maydis, P. sorghi, and P. philippinensis. The identification key of third species of Peronosclerospora accurately to be used in identification of Peronosclerospora causes downy mildew of maize in Indonesia.This identification key is recommended as a method of identification of the causal downy mildew of maize in Indonesia.

TINJAUAN KEANEKARAGAMAN MOLUSKA AIR TAWAR DI BEBERAPA SITU DI DAS CILIWUNG - CISADANE Marwoto, Ristiyanti M.; Isnaningsih, Nur R.
BERITA BIOLOGI Vol 13, No 2 (2014)
Publisher : Research Center for Biology-Indonesian Institute of Sciences

The freshwater molluscs (snails and bivalves) can be found in many type of water course either flowing or stagnant water. Some of them have survived living in bad condition such as polluted water. There are 199 situ (small lakes) in Jabodetabek (Jakarta, Bogor, Depok, Tangerang, Bekasi) have been reported but only 20 % were in good condition, even 12% have dissapeared that caused by silting up of the situ. The aim of the study was to evaluate the diversity of the molluscs as well as to know the condition of on 36 situ along Ciliwung River and Cisadane River. Based on the collected samples, there were 13 species of snails and three species of bivalves. The freshwater snails Filopaludina javanica, Melanoides tuberculata, Pomacea canaliculata always occur in these situ but the bivalves Anodonta woodiana, Pilsbryoconcha exilis and Corbicula javanica only occur in situ Ciranji and Kemuning along Cisadane and Ciliwung rivers, respectively. The decreasing of the mollusc diversity was about 38% in Ciliwung River and 73% in Cisadane River, caused by polluted and silting up of the situ .

PENYERBUKAN PADA SAGU (METROXYLON SAGU) UTAMI, NANDA
BERITA BIOLOGI Vol 3, No 5 (1986)
Publisher : Research Center for Biology-Indonesian Institute of Sciences

NANDA UTAMI. 1986.Pollination in Metroxylon sagu. Berita biologi 3(5): 229 - 231. Inflorescence morphology, flowering biology and insect visitors of sago palm (Metroxylon sagu Rottb.) were observed in Pandeglang, West Java.Sago palm is monoceous plant and self pollinated. However, insect visitors appear to play an important role for fruit setting.It was showed that the number of fruits setting in isolated inflorescence was smaller than in unisolated inflorescence.Some insect visitors recorded were Apis indica, Trigona iridipennis Ryghium haemorrhoidale.and Drosophylla melanogaster

SERANGGA PENGUNJUNG KACANG PANJANG (VIGNA UNGUICULATA) RAHAYUNINGSIH, Y.; NOERDJITO, W.A.; ADISOEMARTO, S.; ASWARI, P.
BERITA BIOLOGI Vol 2, No 9&10 (1984)
Publisher : Research Center for Biology-Indonesian Institute of Sciences

Sekalipun kacang panjang (Vigna unguiculata} meiupakan tanaman sayuran penting,hal ikhwal serangga pengunjungnya, baik yang menguntungkan maupun yang merugikan, belum banyak diungkapkan (Kalshoven et al. 1951). Keterangan mengenai keanekaragaman jenis serangga pengunjung,hubungan tingkat umui tanaman dengan jenis serangga pengunjung, bagian tanaman yang dikunjungi serta peranan dan fungsi masing-masing jenis, pengaruh musim terhadap kehadiran serangga pengunjung kacang panjang belum banyak dipelajari.Oleh karena itu, penanganan terhadap serangga yang berpengaruh langsung atau tidak langsung terhadap kehidupan kacang panjang belum dapat dilakukan dengan pasti. Di negara lain seperti Nigeria (Singh 1975; Ayoade 1975) dan Tanzania (Kayumbo 1975) penelitian hama kacang panjang sudah agak lanjut.untuk melengkapi data biologi serangga pengunjung kacang panjang di Indonesia serangkaian penelitian yang dilaporkan berikut ini telah dilakukan.

Then Ieyer Chromatography Suatu tjara terachir analisa chromatographis Lubis, Ischak
BERITA BIOLOGI Vol 1, No 2 (1968)
Publisher : Research Center for Biology-Indonesian Institute of Sciences

Kemadjuan2 jang ditjapai dalam pengetahuan kimia dewasa ini banjak dirintis oleh.kemadjuan2 jang diperoleh dalam metode2 analisis,Salah satu metode2 tersebut adalah analisa chromatographis janji besar peranannja dalam usaha2 pernisahan dan pemurnian senjawa alami.

UJI AKTIFITAS ENZIM SELULASE DAN LIGNINASE DARI BEBERAPA JAMUR DAN POTENSINYA SEBAGAI PENDUKUNG PERTUMBUHAN TANAMAN TERONG (Solarium melongena) Subowo, YB
BERITA BIOLOGI Vol 10, No 1 (2010)
Publisher : Research Center for Biology-Indonesian Institute of Sciences

The objective of this study was to obtain effective and beneficial microorganism specially fungi, which are able to stimulate and increase eggplant growth. Four lignocellulolytic fungi {Mucor sp. M13T, Aspergillus sp. M2P, Penicillium sp.M3P1, Penicillium sp. R 7.S and mixture of them) were evaluated for their ability to promote plant growth through provision of availability of soluble carbon finally stimulate beneficial microbial growth, and thus promoting eggplant growth. Aspergillus sp. M2P having cellulolytic activity (0.0612 U/ml) and Penicillium sp. M3P1 having ligninase capacity showing different plant growth stimulation on character and yield coefficient. Penicillium sp. M3P1 more effective to increase plant growth than that of control.While Aspergillus sp. M2P was less effective compared to Penicillium sp. M3P1. Therefore,we recommended using Penicillium sp. M3P1 as plant growth promoter for eggplant.

ISOLASI GEN SITRAT SINTASE BAKTERI Pseudomonas aerugenosa PS2 DARI RIZOSFER POHON KRUING (Dipterocarpus sp.) UNTUK MODEL KONSTRUKSI METABOLISME SEL MIKROALGA BERKARBOHIDRAT RENDAH Susilaningsih, Dwi; Umoro, Asahedi; Ochieng, Fredrick Onyango; Widyaningrum, Dian Noverita; Susanti, Hani; Susilo, Hadi; Swastika, I Nengah; Widyastuti, Utut
BERITA BIOLOGI Vol 18, No 2 (2019)
Publisher : Research Center for Biology-Indonesian Institute of Sciences

Pseudomonas has the potential ability for production of citrate synthase synthesis. Pseudomonas aeruginosa could synthesize the enzyme of citrate synthase which is most likely compatible with microalgae cell. Pseudomonas aerugenosa can be found in the rhizosphere of Kruing (Dipterocarpus sp., Dipterocarpaceae). This bacteria is commonly used in agriculture purposes because it is able to synthesize organic acid such as citric acid. These organic acids are synthesized from a reaction between oxaloacetate and acetyl CoA, catalyzed by citrate synthase (CS) in the tricarboxylic acid cycle (TCA). Rhizosphere as microbial sources was obtained from Kruing (Dipterocarpus sp.), which was collected from ?Carita? Research Forest, Pandeglang, Banten, West Java. Citrate synthase gene-specific primers were designed based on citrate synthase gene sequences as depicted in Genbank. The isolation and amplification showed that citrate synthase can be detected and purified from Pseudomonas aeruginosa target and it consists of 1600 bp and encodes 509 amino acids. Based on BLAST (Basic Local Alignment Search Tool) analysis, CS genes that were successfully isolated had 92 % similarity with Pseudomonas aeruginosa type II citrate synthase. This CS gene is expected to be expressed in microalgae metabolism to divert the metabolism of carbohydrate formation into fatty acids.

PENGEMBANGAN TEKNOLOGI PANEN HUJAN DAN ALIRAN PERMUKAAN UNTUK MENEKAN RESIKO KEKERINGAN DAN MENINGKATKAN PRODUKTIVITAS LAHAN (Studi kasus di Sub DAS Bunder, Kabupaten Gunungkidul, Provinsi DIY) Irianto, Gatot; Pujilestari, Nurwindah
BERITA BIOLOGI Vol 6, No 3 (2002)
Publisher : Research Center for Biology-Indonesian Institute of Sciences

Limited water supply on dry season at dry terrain,cause plantation index and plant productivity low. Mean while yearly water volume are potentially enough for twice plant even more if they manage well. Because of that reason using and developing water resource by rainfall and run off harvesting technology, increasing productivity and maintain dry terrain farm operations system at watershed system are approximation strategy needed to put into practice. That strategy can put into practice through hydrologist characteristic modification at river flow area with escalating capacity and capability watershed distribution to minimalist inundation risk and dried out at dry season. Research result at sub watershed Bunder, Wonosari, DIY by way of building two level dam at river bed (hydrology network) can producing 11.6% (channel reservoir 1) and 18.4% (channel reservoir 2) surface flow from existing river-bed and this result can supply water irrigation at least 3 times in planting season rice-secondary crop- secondary crop). If cropping pattern change to rice-rice-secondary crop then run off harvest need to increase become 100% at upper subwatershed (channel reservoir 1) and 19% at lower subwatershed, with condition at MK 1.irrigation area that can be plant with rice only 0.19 ha and the rest of it can be plant with peanut. Rice productivity at rice field are 2.4 ton/ha.

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