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Suratman Umar
Jurusan Biologi FMIPA Universitas Lampung
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology

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KARAKTERISTIK HABITUS DAN LINGKUNGAN POHON SARANG SEMUT RANGRANG (Oecophylla smaragdina) DI BANDAR LAMPUNG Dewi Ariska; Suratman Umar; Nismah Nukmal; M. Kanedi
Jurnal Ilmiah Biologi Eksperimen dan Keanekaragaman Hayati (J-BEKH) Vol. 5 No. 2 (2019)
Publisher : Department of Biology Faculty of Mathematics and Natural Sciences Universitas Lampung in collaboration with The Indonesian Association of Biology (PBI) Lampung Branch.

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jbekh.v5i2.49

Abstract

The weaver ant (Oecophylla smaragdina) is a eusocial insect, whose colonic life is highly dependent on the existence of trees. The existence of the weaver ant in natural habitat is now reduced due to the destruction of habitats caused by humans. To preserve the existence of weaver ant in nature needs to be studied bioecology as the purpose of this research is to know the characteristics of habitus and environment of weaver ants nest in Bandar Lampung. The research was conducted in June-October 2017 at the location of yard and plantation, using 50% sample from the sample population, from 20 districts in Bandar Lampung, 10 sub-districts were used as randomly selected research sites. The results showed as many as 15 types of plants used weaver ant for nesting. The most widely planted species of weaver ant is Mangifera sp. with characteristics of slippery surface habitus, sympodial branching, tree height of 3.9 to 11.5 m and an average canopy of> 65%, more nests found in yards (76%) far from urban areas, the percentage of the dominant nest toward the east , which is 41.8% of the total number of 86 nests.
KEMAMPUAN BERBAGAI TINGKATAN STADIUM LARVA KUMBANG Tenebrio molitor L. (COLEOPTERA : TENEBRIONIDAE) DALAM MENGKONSUMSI STYROFOAM (POLYSTYRENE) Deasy Vidya Carolina Manullang; Nismah Nukmal; Suratman Umar
Jurnal Ilmiah Biologi Eksperimen dan Keanekaragaman Hayati (J-BEKH) Vol. 5 No. 1 (2018)
Publisher : Department of Biology Faculty of Mathematics and Natural Sciences Universitas Lampung in collaboration with The Indonesian Association of Biology (PBI) Lampung Branch.

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jbekh.v5i1.56

Abstract

Kumbang Tenebrio molitor atau yang lebih dikenal sebagai ulat hongkong, memiliki nilai ekonomis karena dapat digunakan sebagai pakan ternak maupun obat bagi manusia dan mudah dibudidayakan. Ulat hongkong belum dimanfaatkan secara maksimal, sementara ulat hongkong secara alami memiliki manfaat yang besar sebagai pengurai senyawa organik dan anorganik di alam, dari penelitian terakhir diketahui dapat mengurai styrofoam. Penelitian ini dilaksanakan pada Juli-Agustus 2016 di Laboratorium Zoologi Jurusan Biologi Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Lampung dengan tujuan untuk mengetahui kemampuan berbagai tingkatan stadium larva ulat hongkong dalam mengkonsumsi styrofoam. Penelitian ini menggunakan Rancangan Acak Lengkap (RAL), dengan 10 instar larva ulat hongkong sebagai perlakuan dan 3 kali pengulangan. Data yang diperoleh dianalisis menggunakan Analisis Ragam (ANARA) dan dilanjutkan uji BNT (Beda Nyata Terkecil) pada taraf beda nyata 5% serta dilakukan analisis korelasi antara jumlah styrofoam yang dimakan dengan berat serta panjang ulat hongkong. Hasil analisis ragam menunjukkan bahwa pakan styrofoam mempengaruhi berat dan panjang ulat hongkong, serta lama stadium ulat hongkong (p < 0,05). Hasil analisis korelasi antara berat ulat hongkong dan jumlah pakan yang dimakan menunjukan adanya hubungan positif yang sangat kuat (r = 0,96), dan pada korelasi antara panjang ulat hongkong dan jumlah pakan yang dimakan menunjukkan adanya hubungan postif yang kuat (r = 0,66).
PREVALENSI NEMATODA USUS PADA KAMBING (Capra sp.) DENGAN PEMBERIAN PAKAN HIJAUAN DAN KONSENTRAT DI KELURAHAN SUMBER AGUNG, KECAMATAN KEMILING, BANDAR LAMPUNG Amanda Amalia Putri; Sri Murwani; Suratman Umar
Jurnal Ilmiah Biologi Eksperimen dan Keanekaragaman Hayati (J-BEKH) Vol. 3 No. 1 (2016)
Publisher : Department of Biology Faculty of Mathematics and Natural Sciences Universitas Lampung in collaboration with The Indonesian Association of Biology (PBI) Lampung Branch.

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jbekh.v3i1.73

Abstract

The Ability of Soil Bacteria from Liwa Botanical Gardens to Produce Indole Acetic Acid Hormone (AIA) Cristina Nugroho Ekowati; Agung Sanjaya; Suratman Umar; Sumardi Sumardi
Jurnal Ilmiah Biologi Eksperimen dan Keanekaragaman Hayati (J-BEKH) Vol. 9 No. 1 (2022): June Edition
Publisher : Department of Biology Faculty of Mathematics and Natural Sciences Universitas Lampung in collaboration with The Indonesian Association of Biology (PBI) Lampung Branch.

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jbekh.v9i1.202

Abstract

Hormon AIA berperan besar dalam memperbesar dan memperpanjang sel, pembelahan sel, khususnya pada daerah ujung tanaman. Bakteri yang memiliki kemampuan dalam menghasilkan hormon AIA diantaranya  Enterobacter sp., Azospirillum sp., Klebsiella sp., Alcaligenes faecalis, Azoarcus sp., Serratia sp., Azotobacter sp., Cyanobacteria, Erwinia herbicola, Pseudomonas sp., Rhizobium, Bradyrhizobium, Agrobacterium tumafaciens. Sintesis AIA ini memerlukan senyawa tambahan berupa triptopan. Namun beberapa bakteri mampu memproduksi AIA tanpa penambahan prekursor. Penelitian ini bertujuan untuk memperoleh isolat bakteri penghasil hormon AIA dari tanah Kebun Raya Liwa. Pada ini diawali dengan isolasi bakteri tanah asal Kebun Raya Liwa, selanjutnya dilakukan uji kemampuan produksi AIA secara kuantitatif tanpa penambahan triptopan. Pengujian produksi AIA secara kualitatif dilakukan dengan menggunakan media Nutrien Broth dengan metode spektrofotometri dengan penambahan reagen salkowsky dan dilakukan pengamatan setelah 72 jam inkubasi. Data yang didapatkan disajikan dalam bentuk tabel. Hasil penelitian didapatkan 9 isolat yang mampu menghasilkan hormon AIA dengan kadar yang berbeda. Isolat penghasil AIA tertinggi yaitu isolat DT1 dengan kadar 114 ppm yang mempunyai karakteristik berbentuk bacil berwarna putih susu dan tidak berspora.     AIA hormone plays a role in enlarging and elongating cells, and cell division, especially at the tip of the plant. Bacteria that have the ability to produce IAA hormones include Enterobacter sp., Azospirillum sp., Klebsiella sp., Alcaligenes faecalis, Azoarcus sp., Serratia sp., Azotobacter sp., Cyanobacteria, Erwinia herbicola, Pseudomonas sp., Rhizobium, Bradyrhizobium, Agrobacterium tumafaciens. The synthesis of AIA requires an additional compound in the form of tryptophan. However, some bacteria can produce AIA without the addition of precursors. The goal of this study was to obtain isolates of AIA hormone-producing bacteria from the soil of the Liwa Botanical Gardens. This begins with the isolation of soil bacteria from the Liwa Botanical Gardens, then a quantitative test of AIA production capability is carried out without the addition of tryptophan. Qualitative testing of AIA production was carried out using Nutrien Broth media with spectrophotometric methods with the addition of Salkowsky reagent and observations were made after 72 hours of incubation. The data obtained are presented in tabular form. The results showed that 9 isolates were able to produce the AIA hormone at different levels. The highest AIA-producing isolate was the DT1 isolate with a concentration of 114 ppm which had the characteristics of a milky white bacillus and no spores.      
The Potential of Soil Bacterial Isolates from Liwa Botanical Gardens, West Lampung as Phosphate Solubilizing Bacteria Cristina Nugroho Ekowati; Rina Shintia; Suratman Umar; Bambang Irawan
Jurnal Ilmiah Biologi Eksperimen dan Keanekaragaman Hayati (J-BEKH) Vol. 9 No. 1 (2022): June Edition
Publisher : Department of Biology Faculty of Mathematics and Natural Sciences Universitas Lampung in collaboration with The Indonesian Association of Biology (PBI) Lampung Branch.

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jbekh.v9i1.203

Abstract

Tanah Kebun Raya Liwa (KRL) Lampung Barat merupakan tanah jenis laterit yang kandungan unsur hara dan kesuburan tanahnya rendah, sehingga tidak dapat mendukung pertumbuhan tanaman hias yang ada secara optimal. Salah satu unsur hara yang penting dalam menunjang kesuburan dan pertumbuhan tanaman adalah fosfat. Jumlah fosfat terlarut dalam tanah yang dapat dimanfaatkan oleh tanaman sangat sedikit sehingga menyebabkan defisiensi. Bakteri pelarut fosfat asli dibutuhkan untuk memenuhi kebutuhan fosfat bagi tanaman. Tujuan dari penelitian ini adalah untuk mendapatkan isolat bakteri pelarut fosfat yang berpotensi melarutkan fosfat. Penelitian ini dilaksanakan pada bulan Maret sampai Juni 2021 meliputi isolasi bakteri pelarut fosfat dan pengujian potensi pelarutan fosfat pada media pikovskaya padat. Potensi bakteri pelarut fosfat ditentukan berdasarkan nilai Indeks Kelarutan Fosfat (IPF) tertinggi. Hasil isolasi tanah dari Kebun Raya Liwa diperoleh 10 isolat yang mampu melarutkan fosfat dan menghasilkan zona bening. Isolat dengan potensi pelarutan fosfat terbaik adalah isolat C1 dan C3 dengan nilai indeks pelarutan fosfat 2, 6 dan 2.       Liwa Botanical Gardens (KRL) soil, West Lampung is a lateritic soil type nutrient content and low soil fertility, so it can’t support the growth of existing ornamental plants optimally. One of the important nutrients in supporting fertility and plant growth is phosphate. The amount of dissolved phosphate in the soil that can be utilized by plants is very small, causing a deficiency. Indigenous phosphate solubilizing bacteria are needed to meet the needs of phosphate for plants. The purpose of this study was to obtain isolates of phosphate solubilizing bacteria that have the potential to dissolve phosphate. This research was carried out from March to June 2021 covering the isolation of phosphate solubilizing bacteria and testing the potential for dissolving phosphate on solid pikovskaya media. Potential phosphate solubilizing bacteria were determined based on the highest Phosphate Solubility Index (IPF) value. The results of soil isolation from Liwa Botanical Gardens obtained 10 isolates capable of dissolving phosphate and producing a clear zone. Isolates with the best phosphate solubilizing potential were isolates C1 and C3 with phosphate solubilizing index values of 2, 6 and 2.      
Co-Authors Agung Sanjaya Amanda Amalia Putri Bambang Irawan Cristina Nugroho Ekowati Deasy Vidya Carolina Manullang Dewi Ariska M. Kanedi Nismah Nukmal Rina Shintia Sri Murwani Sumardi, Sumardi