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BERITA BIOLOGI

berita_biologi
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Published by Lembaga Ilmu Pengetahuan Indonesia

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Core Subject : Science, Agriculture,

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

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Articles 2,125 Documents

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KOMPOSISI KIMIA MINYAK ATSIRI PADA BEBERAPA TIPE DAUN TEMBAKAU (Nicotiana tabaccum L.) Nurnasari, Elda; Subiyakto, Subiyakto
BERITA BIOLOGI Vol 10, No 5 (2011)
Publisher : Research Center for Biology-Indonesian Institute of Sciences

Steam distilation of tobacco (Nicotiana tabaccum L) from 4 different area, Madura (1160 gram), Temanggung (2000 gram),Bondowoso (3528 gram), and Blitar (950 gram) yielded 2,67x10-2 %, 6,93x10-2 %, 0,8428%, and 0,0632 % essensial oil respectively.The oils then analyzed using GC-MS methods. The results identified 30 components from the Maduraâs tobacco, 11 components from the Temanggungâs tobacco, 67 components from the Bondowosoâs tobacco, and 20 components from the Blitarâs tobacco.The major essential oil compounds was neophytadien.

KOMPOSISI JENIS DAN CADANGAN KARBON DI HUTAN TROPIS DATARAN RENDAH, ULU GADUT, SUMATERA BARAT [Species Composition and Carbon Stock in Tropical Lowland Forest, Ulu Gadut, West Sumatra] Suwardi, Adi Bejo; Mukhtar, Erizal; Syamsuardi, Syamsuardi
BERITA BIOLOGI Vol 12, No 2 (2013)
Publisher : Research Center for Biology-Indonesian Institute of Sciences

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14203/beritabiologi.v12i2.529

Tropical lowland forest is one type of forest ecosystem that dominated most of Sumatra areal and retained carbon terrestrial within.Tropical lowland forest has the highest risk of damage than other forest types. The aimed of study is to determine species composition and carbon stock in tropical lowland forest, Ulu Gadut, West Sumatra. This study was conducted on June to October 2012 at 1 ha Pinang-Pinang permanent plot. Tree biomass was measured by using the non destructive sampling method. All trees with stem diameter at breast height (dbh) = 8 cm were measured diameter and were recorded the species of trees.As much as 852 individuals of trees, which were consisting of 45 families and 155 species with DBH = 8 cm were found in Pinang-Pinang permanent plot. Nephelium juglandifolium Blume, Swintonia schwenckii (T. & B.) Kurz,Syzygium sp.,Microcos florida (Miq.) Burret, Palaquium sp.,Cleistanthus glandulosus Jabl., Hopea dryobalanoides Miq., Mastixia trichotoma Blume, Calophyllum soulattri Burm. f. and Shorea maxiwelliana King were dominant based on -1 -1 Importance Value Index(IVI). Trees biomass and carbon stock in the study site are around 482.75 ton ha and 241.38 ton C ha respectively.

FLUKTUASI AIR DALAM TUMBUHAN (PLANT WATER RELATIONS) DAN STABILITAS TAMAN NASIONAL GUNUNG HALIMUN: KIANAK { CASTANOPSIS ACCUMINATATISSIMA (BL.) DC} Naiola, B Paul; Hoesen, D Siti Hazar
BERITA BIOLOGI Vol 6, No 4 (2003)
Publisher : Research Center for Biology-Indonesian Institute of Sciences

Information on the water relations of tropical plant species are less available,. This paper deals with a study of the water relations of tropical forest tree species, Kianak {Castanopsis Accuminatatissima (Bl.) DS}], a habitant of Gunung Halimun Natinal park. The purpose of this study held in October 2001, is to understand the water relation fluctuations of tropical tree species, especially those grown in a stablie ecosystem such as National Park. Parametes meansured are water potential components incluiding total water potentials. Meansurement were conducted by Pressure Chamber. The results shows that Kianak kept their average total water potentila at -0.48 MPa, while their average Â osmotic potential were held at -1.54 MPa, thus they retained their average cells/tissues turgor pressure at 1.06 MPa. Diurnal water potentials shows no significant flutuations (-0.47 MPa at 10 am,-0.48 MPa at 1 pm and -0.48 MPa at 3 pm), thus no sign of significant water stress. The value of average water potential at turgor loss pint achieved at -1.92 MPa, indicated a phenomenon of moderate drought resistance species. Based on this results, the discussion emphasize the water relations of tripical forest plants and the important of plant water relations information in the managment of National Parks and other reserved biosphere, where plants as a main components. It is suggested to enlarge such this study (incluiding seasonal fluctuations of plant water relations and covering wider forest species), under the light of Natinal park and other biosphere sities managment.

PENGARUH SINAR GAMMA PADA BENIH MANGGIS (Gardnia mangostana L.) [Effects of Gamma Rays on Mangosteen (Garcinia mangostana L.) Seeds] Hutabarat, Dameria
BERITA BIOLOGI Vol 5, No 1 (2000)
Publisher : Research Center for Biology-Indonesian Institute of Sciences

Mangosteen seeds were irradiated with gamma rays from Co dosages 2.5 Gy, 5 Gy, 7.5 Gy, 10 Gy, 20 Gy, 40 Gy and 60 Gy. The germination rates of irradiated seeds were reduced by an average of 20 % at 20 Gy, 67 % at 40 Gy and no seed germination at 60 Gy.The effects of the treatment on the survival of irradiated seeds were observed.Gamma rays at low dosage (2.5 Gy) was stimulating to seedling growth. The best dosages for inducing variation were around 10 - 20 Gy;variation induced by the treatment included total leaves number and seedling height.

KANDUNGAN SELENIUM DALAM HERBA TERSELEKSI DARI DAERAH VULKANIS DAN AKTIVITAS GLUTATION PEROKSIDASE SERTA PENGARUHNYATERHADAPPENYUSUTAN SELMODEL Saccharomyces cerevisiae JB3505 Rahaju, Sri Hartin
BERITA BIOLOGI Vol 9, No 4 (2009)
Publisher : Research Center for Biology-Indonesian Institute of Sciences

An exploration of selenium containing herbs was carried out in the Kerinci -Sumatera, Toraja highland-Sulawesi and Rinjani-Lombok. The herbs were sampled according to their morfofisiological characters and local etnopharmalogical information.The analitical parameters were the selenium and selenomethionine content as measured by AAS and GC respectively, gluthathione peroxidase as measured biochemically dan cell model shrinkage observation to reveal the selenium containing extract effect on celluler development. The result indicates the diversity of both content and functional selenium compounds in the selected herbs.The relatively high selenium content herbs such as A Ilium sativuin 1NHR had hingher gluthathione peroxidase and hence its antioxidant activity.However the relatively lower selenium content of Physalis angulata 33NHR was able to induce more cell model shrinkage. The phenomenon of relation among selenium based selenoamino acid, antioxidant and cell shrinkage potential need to be futher studied on these selected herbs.

GONADAL DEVELOPMENT AND SPAWNING FREQUENCY OF TILAPIA (Oreochromis niloticus) THAT FEEDED BY VITAMIN E SUPPLEMENTATION [Perkembangan Gonad dan Performa Pemijahan Induk Ikan Nila (Oreochromis Niloticus) yang diberi Pakan dengan Penambahan Vitamin E Suplementasi] Pamungkas, Wahyu; Tahapari, Evi; Darmawan, Jadmiko
BERITA BIOLOGI Vol 13, No 3 (2014)
Publisher : Research Center for Biology-Indonesian Institute of Sciences

Vitamin E merupakan salah satu mikronutrien penting yang berpengaruh terhadap performa reproduksi ikan. Penelitian penambahan vitamin E dalam pakan induk ikan nila (Oreochromis niloticus) bertujuan untuk mengetahui pengaruh vitamin E terhadap perkembangan gonad dan performa pemijahan induk ikan nila. Pakan uji yang digunakan adalah pakan formula dengan kadar protein 35% dan lemak 10% ditambahkan vitamin E (tingkat kemurnian 50%) dengan dosis A) 0, B) 75, C) 150, D) 225, E) 300 and F) 375 mg/kg pakan (kontrol). Induk ikan nila umur 6-7 bulan sebanyak 180 ekor dipelihara dalam 6 jaring ukuran 3x3x1,5m yang diletakkan dalam kolam 6000 m2 dengan kedalaman air 80 cm. Masing-masing jaring diisi dengan 20 ekor induk betina dan 10 ekor induk jantan dan dipelihara selama 13 minggu pada bulan September sampai dengan November 2011. Hasil penelitian menunjukkan bahwa penambahan vitamin E pada pakan induk ikan nila memberikan nilai indeks gonad somatik lebih tinggi dibandingkan yang kontrol. Penambahan vitamin E sebanyak 225 mg/kg pakan memberikan nilai persentase induk matang gonad yang tertinggi (80%) dan frekuensi pemijahan yang terbanyak yaitu 22 kali selama masa pemeliharaan 13 minggu. Berdasarkan hasil penelitian yang diperoleh dapat disimpulkan bahwa penambahan vitamin E sebanyak 225 mg/kg pakan dapat meningkatkan perkembangan gonad, jumlah induk betina yang matang gonad, persentase total pemijahan dan frekuensi pemijahan pada induk ikan nila.

Impatiens Arriensii (Zoll.) T. Shimizu (BALSAMINACEAE) JENIS ENDEMIK DARIPULAU MADURA Utami, Nanda
BERITA BIOLOGI Vol 5, No 2 (2000)
Publisher : Research Center for Biology-Indonesian Institute of Sciences

Impatiens arriensii (Zoll.) T.Shimizu is endemic to Madura island. This species is confined only to certain locations on this island.It is remarkable in having four locular ovary with the fusing together of all four lateral petals.The populations of I.arriensii in Madura island was found to be extinct in 1999, (presumably) due to the habitat disturbance.Detailed description and illustration are provided.

SELEKSI JAMUR PATOGEN SERANGGA Beauveria spp. SERTA UJI PATOGENISITASNYA PADA SERANGGA INANG-WALANG (Leptocorisa acuta) [Selection of Enthomopathogenic Fungi Beauveria spp. and their Pathogenicity Test Against Insect Host-Rice Stink Bug (Leptocorisa acuta)] Wartono, Wartono; Nirmalasari, Cyntia; Suryadi, Yadi
BERITA BIOLOGI Vol 15, No 2 (2016)
Publisher : Research Center for Biology-Indonesian Institute of Sciences

Rice-stink bug (Leptocorisa acuta Thumb) that attack rice crop often causing heavy damage of panicle of rice as well as decreasing either quantity or quality of grain after harvest. The objective of this research was to select 14 entomopatogenic fungi of Beauveria spp. isolates, collected from rice stink bug (L. acuta) and their pathogenicity assay to insect host L. acuta. We also aimed to study diversity of Beuveria spp. which was isolated from insect host from Situgede, Bogor. The research was conducted at Laboratory, and Green house of Center for Agricultural Biotechnology and Genetic Resources Research and Development, Bogor, in 2014. Result of the study showed that isolates from Situgede Bogor were sucessfully isolated Â as Beauveria spp. based on Koch Postulat assay. Â The identified fourteen isolates were morphologically confirmed as Beauveria spp. The pathogenicity test was indicated by symptoms and mortality of rice stink bug after inoculation with these entomopathogenic fungi. The Beuveria isolates Stgd2(14)1, Stgd6(14)1, Stgd7(14)2, Stgd8(14)2, and Stgd0113 were the most virulent isolates. Stgd2(14)1 provided the fastest time to kill L. acuta with LT50 values of 6.9 days. The 13 isolates of Beauveria were well amplified by ITS primers. However, no diversity was found among isolates, presumably due its narrow host range tested.Â

TOLERANSI SENGON BUTO (Enterolobium cyclocarpum Griseb) YANG DITANAM PADA MEDIA LIMBAH TAILING TERCEMAR SIANIDA DENGAN PERLAKUAN PUPUK Syarif, Fauzia
BERITA BIOLOGI Vol 9, No 1 (2008)
Publisher : Research Center for Biology-Indonesian Institute of Sciences

Sengon buto (Enterolobium cyclocarpum Griseb) is one of the potential plant species for land reclamation and possibly for phytoremediation because of its fast growing even on poor soil, and its ability to fertilize soil through nitrogen fixation. For phytoremediation purpose we need fast growing plant with high ability to absorp target contaminant. Fertilization is needed to improve plant growth. This experiment was carried out to study the tolerance of sengon buto (Enterolobium cyclocarpum Griseb) grown on cyanide contaminated tailing media on various level of NPK fertilizer.The sengon buto seed were planted in the tailing of gold mine media mixed with compost (4:1) in pots. Various levels of NPK fertilizer were applied i.e. 0, 2, 4, 6, 8 g/pot at 2 and 2.5 month after planting (MAP).The plant were harvested at 6 MAP. The result showed that NPK fertilizer increase plant growth at level 2 of 2 g/pot, however the value of the increment was not significantly different with control plant (0 g/pot). Cyanide content of NPK treated plants were higher than the untreated plants. The highest value of shoot/root cyanide content ratio was on the NPK untreated plants (4.34) followed by 2 g/pot treatment (3.59). It is means that sengon buto is potential for phytoremediation of tailing of gold mining.

PENELITIAN EKOLOGI HUT AN LAHAN PAMAH DI BARITO ULU, KALIMANTAN TENGAH: II. SERASAH DAN KANDUNGAN HARANYA [Ecological Studies of Lowland Forest in Barito Ulu, Central Kalimantan: II. Litterfall and Nutritional Content] Mirmanto, Edi
BERITA BIOLOGI Vol 4, No 5 (1999)
Publisher : Research Center for Biology-Indonesian Institute of Sciences

A study on litterfall and their nutrient content has been conducted in the Barito Ulu research station, Central Kalimantan. Five plots of 50m x 50m were established to describe the forest structure and floristic composition. In each plot 10 of 1m x 1m litter-traps were emplaced on 25-28 April 1994, and litterfaii (ieaves, branches, flowers+fruits and miscellaneous) was collected twice at the mid and the end of month from May 1994 until May 1995. The litterfall chemical analyses were made for sampbs collected in May, June, July 1994 (dry season) and November and December 1994 and January 1995 (wet season). The mean annual total litterfall in the five plots was 8,4 t ha yr< (range 7,3-9,5). The total litterfall was highest in October 1994 coinciding with the later part of dry season. The litterfall mineral-element concentrations and accession were below or within the range reported for other tropical forests. On the basis of Vitousek litter nutrient concentration hypothesis phosphorus tended to be more efficiently used than nitrogen. This means that growth of forest would be expected to be more limited by phosphorus. However the results of fertilization experiment in this forest suggested that primary production of forest might be more limited by nitrogen. This is a new information that primary production of lowland tropical forest was also limited by nitrogen. The results in detail of the fertilization experiment will be published separately.

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