Article Per Year (5 Year)
p-Index From 2020 - 2025
1.048
P-Index
This Author published in this journals
All Journal HAYATI Journal of Biosciences Jurnal Agronomi Indonesia (Indonesian Journal of Agronomy) Jurnal Fitopatologi Indonesia Jurnal Ilmu Pertanian Jurnal Natur Indonesia Jurnal Ilmu Pertanian KULTIVAR AGROEKOTEKNOLOGI Kultivasi jurnal Ilmu Pertanian (Agricultural Science) PERTANIAN TROPIK Makara Journal of Science
Luthfi Aziz Mahmud Siregar
Universitas Sumatera Utara
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Earth & Planetary Sciences Economics, Econometrics & Finance Medicine & Pharmacology

Published : 44 Documents Claim Missing Document
Claim Missing Document
Check
Articles

Found 44 Documents
Search

 1   2   3   4   5 
PENGARUH KASEIN HIDROLISAT DAN INTENSITAS CAHAYA TERHADAP PRODUKSI BIOMASSA DAN ALKALOID CANTHINONE DI DALAM KULTUR SUSPENSI SEL PASAK BUMI (Eurycoma longifolia Jack) Siregar, Luthfi Aziz Mahmud; Keng, Chan Chan; Lim, Boey Peng
Makara Journal of Science Vol. 14, No. 1
Publisher : UI Scholars Hub

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Effects of Casein Hydrolisate and Light Intensity on Production of Biomass and Canthinone Alkaloid in Cell Suspension Cultures of Pasak Bumi (Eurycoma longifolia Jack). A study on the effect of several concentrations of casein hydrolysate and light intensity to produce biomass and canthinone alkaloid in cell suspension culture of Pasak Bumi (Eurycoma longifolia Jack) was conducted. The research was an experimental study with block random design non factorial. For study of casein hydrolysate was used 8 (eight) of concentration treatments, i.e. 0.00, 0.10, 0.25, 0.50, 0.75, 1.00, 2.00, dan 5.00% (w/v). Beside for study of different light intensity effect was used five of light intensity, i.e. 0, 190, 290, 585, and 1525 lux. The results showed that addition 0.1–2.0% (w/v) of casein hydrolysate into culture medium did not show the effect on production of cell biomass compare with without casein hydrolysate. Total of alkaloid produce increased two fold in the culture medium containing 0.1% casein hydrolysate. The medium with addition 5% casein hydrolysate significantly decrease of increased fresh weight, dry weight and total of alkaloid compare with medium without or additions of casein hydrolysate at 0.1–2.0% concentration. Besides, the modifications on light intensity (0–1525 lux) did not effect the production of cell biomass in culture medium, but the place of E. longifolia Jack cell suspension culture at light of 1525 lux was found have to stimulate increased the total of 9- methoxycanthin-6-one in cells.
Potensi Dark Septate Endophyte Isolat Sumatera Utara terhadap Ganoderma boninense Penyebab Busuk Pangkal Batang Kelapa Sawit: Potential of Dark Septate Endophytes North Sumatra Isolates Against Ganoderma boninense the Pathogen of Basal Stem Rot of Oil Palm Firdani, Citra; Lisnawita; Siregar, Luthfi Aziz Mahmud
Jurnal Fitopatologi Indonesia Vol 20 No 3 (2024): Mei 2024
Publisher : The Indonesian Phytopathological Society (Perhimpunan Fitopatologi Indonesia)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14692/jfi.20.3.154-164

Abstract

Penyakit busuk pangkal batang yang disebabkan oleh Ganoderma boninense menyebabkan kerusakan signifikan pada perkebunan kelapa sawit di Asia Tenggara, termasuk di Indonesia. Penggunaan fungisida kimia yang intensif terhadap Ganoderma dapat berdampak negatif terhadap lingkungan, kesehatan, dan terganggunya keseimbangan ekologi. Aplikasi mikrob sebagai agens hayati menggunakan cendawan endofit antagonis, salah satunya dark septate endophyte (DSE) berpotensi sebagai pengendalian Ganoderma. Penelitian ini bertujuan mendapatkan isolat DSE lokal Sumatera Utara dari areal endemik Ganoderma yang berpotensi untuk mengendalikan G. boninense. Eksplorasi cendawan DSE dilakukan pada areal dengan insidensi Ganoderma moderat (5%-30%) di Kecamatan Galang, Kabupaten Deli Serdang dan pengujian dilakukan secara in vitro. Hasil penelitian didapat lima isolat cendawan DSE, yaitu isolat II 3 A CM, Gelap A, II 4 CM, II 3 A CC, dan abu-abu. Kemampuan daya hambat terhadap perkembangan G. boninense secara in vitro dari yang paling tinggi berturut-turut adalah isolat Gelap A (100%), abu-abu (90.87%), II 3 A CC (82.83%), II 3 A CM (82.23%), dan II 4 CM (74.88%) pada 7 hari setelah inokulasi. Temuan ini merupakan data awal akan potensi cendawan DSE sebagai agens hayati G. boninense dan merupakan laporan pertama untuk cendawan DSE asal tanaman kelapa sawit di Sumatera Utara.
In vitro The Role of Paclobutrazol in Potato Seed Production (Solanum tuberosum L) cultivar Granola Kembang Early Generation (G0) In Vitro: Potato Purba, Hans Samuel; Hot Setiado; Siregar, Luthfi A. M.
Jurnal Pertanian Tropik Vol. 8 No. 1 (2021): JURNAL ONLINE PERTANIAN TROPIK
Publisher : Talenta Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (697.546 KB) | DOI: 10.32734/jopt.v8i1.5891

Abstract

The aim of the research was to determine the best paclobutrazol treatment to obtain superior quality seed potato cultivars. The research was conducted at the Tissue Culture Laboratory of Horticulture Technical Centre Service Unit, Gedung Johor, Medan, North Sumatra, Indonesia from January 2020 to March 2020. The complete randomized design with a single factor, 4 treatments, and 6 replications was used in this research. The results showed that the concentration of paclobutrazol affected the number of leaves, the shoots length, the number of shots, the number of nodes, the number of internodes, the stem diameter, and the percentage of roots formed but not significantly affected the number of roots. The M2 treatment, MS + 9 ppm paclobutrazol, showed the best treatment with an average plantlet performance value of 7.33 and the plantlets showed the compact morphology with larger stem diameter and smaller thick dark green leaves.
Microbial phosphate solubilization mechanisms in P solubilizing in andisol Marpaung, Agustina Erlinda; Sabrina, Tengku; Rauf, Abdul; Susilowati, Dwi Ningsih; Siregar, Luthfi Aziz Mahmud
Kultivasi Vol 23, No 2 (2024): Jurnal Kultivasi
Publisher : Universitas Padjadjaran

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24198/kultivasi.v23i2.52749

Abstract

Phosphate (P) nutrient plays a significant role in plant growth and yield. P is an essential element that plays an important role in photosynthesis and root development. Phosphate nutrient availability is deficient in some soil types due to retention, such as in Andisol soil types. High phosphate retention in Andisol soil types causes P nutrients to be unavailable to plants and can reduce crop yields. The availability of P in Andisol soils can be done, among others, by applying phosphate solubilizing microbes. Phosphate solubilizing microorganisms are soil microorganisms consisting of bacteria and fungi that can mineralize organic P, dissolve inorganic P minerals, and store large amounts of P to make it available to plants. This literature review aims to determine the mechanism of phosphate-solubilizing microbes in P dissolution in Andisol soil. The methods used in this systematic review are collecting data through the internet and utilizing recognized sources such as Science Direct, Research Gate, Google Scholar, and Web of Science. Content analysis was performed on the collected data, and the results were organized into thematic categories. Furthermore, the findings are presented descriptively with the help of tables to facilitate understanding. Since phosphate-solubilizing microorganisms can dissolve P in the soil through chemical and biological mechanisms, it can be concluded that phosphate-solubilizing microorganisms also have an important role in the soil P cycle. The implications of this literature review are to understand the retention of P nutrients in Andisols and how the dissolution mechanism works, as well as the use of microbes as a solution to increase phosphate dissolution so that it is available to plants.
Co-Authors Abd. Rasyid Syamsuri Abdul Rauf Agus Pernando Simanjuntak Asima napitupulu Asma Ul Husna Ayu Oshin Yap Sinaga Beatrix Blandina BOEY PENG LIM Boey Peng-Lim CHAN LAI KENG Chan Lai-Keng Chandri Lidya Putri Nasution Diana Sofia Hanafiah DWI NINGSIH SUSILOWATI Dyanne Gisella P. Tambak Elseria Siburian Emmy Harso Kardhinata Emmy Rosita Erni Royani Harahap Eva Sartini Bayu Eva Sartini Bayu Firdani, Citra Fristy Rebecca Hasianta Sitohang Hanipah Tanjung Hapsoh Hasmawi Hasyim2 Hasmawi Hasyim2 Heri Hidayat Hilda Mei Yeni Harahap Hot Setiado Hot Setiado Hot Setiado I.M. Revandi Damanik Imam, muhammad Ira Tiarma Sari Damanik Julita Julita Keng, Chan Chan Khairunnisa Lubis Khairunnisa Lubis Lambok Turnip Larosa Harahap Lili Herawati Siregar Linda Tri Wira Astuti Lisa Lisa Mawarni Lisnawita Lita Adelia Lollie A. P. Putri Agustina P Putri Lollie Agustina P Putri Lollie Agustina P. Putri Lollie Agustina P. Putri Lollie Agustina P. Putri Lollie Agustina P. Putri Mahyuddin Dalimunte Marpaung, Agustina Erlinda Milani, Ayu Mona Faronika1 Mona Faronika1 Mutia Rahmah Nazriah pratiwi Nella Angelina Simanjuntak Nina Unzila Angkat nuraminah nasution Permata Sari Harahap Purba, Hans Samuel Putri Hasanah Jumroh Retno Diah Setiowati Revandy Iskandar Muda Damanik Riski Aulia Risma Damayanti Rosmayati Rosmayati Rosmayati Rosmayati Rosmayati Rosmayati Rozaliana Rozaliana Siti Aminah Sopa Putri Tanjung Tengku Sabrina Triningsih Triningsih Ulfa Ridha Andini Utri Patma1 Utri Patma1 Yoppi Operasisco Gabesius Yusuf Husni Yusuf Husni