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All Journal Jurnal Biologi Udayana Agrikultura AGRIVITA, Journal of Agricultural Science Jurnal Agroekoteknologi Jurnal Agro Padjadjaran Journal of Dentistry Kultivasi Jurnal Agrotek Tropika Jurnal Teknologi Pertanian Andalas AGROLOGIA : Jurnal Ilmu Budidaya Tanaman Soil REns Agro Bali: Agricultural Journal
Diyan Herdiyantoro
Fakultas Pertanian, Universitas Padjadjaran, Bandung
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Computer Science & IT Dentistry Environmental Science Health Professions Immunology & microbiology Medicine & Pharmacology Public Health

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KARAKTERISTIK PERTUMBUHAN DAN WAKTU GENERASI ISOLAT Azotobacter sp. DAN BAKTERI ENDOFITIK ASAL EKOSISTEM LAHAN SAWAH Mieke Rochimi Setiawati; Pujawati Suryatmana; Diyan Herdiyantoro; Zahra Ilmiyati
Jurnal Agroekoteknologi Vol 6, No 1 (2014)
Publisher : Jurusan Agroekoteknologi Fakultas Pertanian Untirta

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (174.49 KB) | DOI: 10.33512/j.agrtek.v6i1.222

Abstract

Azotobacter sp. and N2-fixation endophytic bacteria are microbes that play a role in fixation the N2 from the free air and helps supply of N to plants and can make efficient use of N derived from inorganic fertilizer. N2-fixation microbes utilization in rice fields can reduce the cost of production of rice plants. By studying the characteristics of the two types of beneficial bacteria that is expected to be engineered to enhance the role of these bacteria contribute in supplying N to rice crops. The method used in this study is exploratory and observe the characteristics of growth and generation time of bacteria for 72 hours. The results of this study indicate that the bacterial isolates of Azotobacter sp-1 has the highest population in 48 hours with a total population of 1.58 x107 cfu ml-1 , whereas bacteria Azotobacter sp-2 has the highest population in 60 hours with a total population of 3.12 x106 cfu ml-1 . Both N2-fixation endophytic bacteria populations reached the highest peak in the 60th hour with a total population of N2-fixation endophytic bacteria-1 at 1.12 x 108 cfu ml-1 of N2-fixation endophytic bacteria-2 of 9.4 x 107 cfu ml-1 of both isolates endophytic bacteria showed a similar growth pattern. Azotobacter sp. isolates from rhizosfir of the rice plant have a difference generation time, while the two isolates of N2-fixation endophytic bacteria from tissue of rice plants having the same generation time. Isolates of Azotobacter sp.-1 had the fastest of generation time, capable of generating new cells every 158.66 minutes or every 2.64 hours.
RETARDED GROWTH OF LOWLAND RICE IN SALINE SOIL INOCULATED WITH NITROGEN-FIXER AZOTOBACTER Reginawanti Hindersah; Alia Halimatusy; Benny Joy; Mieke Rochimi Setiawati; Diyan Herdiyantoro
Jurnal Agroekoteknologi Vol 12, No 1 (2020)
Publisher : Jurusan Agroekoteknologi Fakultas Pertanian Untirta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33512/jur.agroekotetek.v12i1.8782

Abstract

Low-land rice (Oryza sativa L.) cultivation in saline soils face some constraints include nitrogen availability. Saline-resistant nitrogen fixing bacteria Azotobacter are expected to increase supply nitrogen in saline soils. The objectives of the study were to determine the effect of liquid inoculant concentration of two Azotobacter isolates on early vegetative growth of lowland rice grown in potted saline soil.  The greenhouse trial design was a randomized block design with seven treatments and four replications. The treatments were combination of isolates and Azotobacter liquid inoculant concentrations in single and mixed inoculation. The results showed that all plants experienced chlorosis and stunt due to high Electrical Conductivity. Inoculation of different isolates and concentrations did not influence the growth of lowland rice in soil with high EC at the end of experiment. Therefore, neither isolates nor concentration of Azotobacter could improve retarded-growth of lowland rice in saline soil.
PENGARUH PUPUK HAYATI DAN DOSIS AZOTOBACTER SP. DALAM FITOREMEDIASI MENGGUNAKAN TANAMAN RAMI (BOEHMERIA NIVEA L. GAUD) PADA TANAH TERCEMAR HIDROKARBON MINYAK BUMI Gea Anggun Pratiwi; Diyan Herdiyantoro; Pudjawati Suryatmana
Jurnal Teknologi Pertanian Andalas Vol 22, No 1 (2018)
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (521.252 KB) | DOI: 10.25077/jtpa.22.1.13-21.2018

Abstract

Phytoremediation in soil contaminated with petroleum hydrocarbon is a technology to remediate contaminant using plant as nutrient availability facilitator for degrading microbials in the rhizosphere. Phytoremediation can be promoted by biofertilizers containing nitrogen fixer, phosphate solubilizer, and mychorrizal for improving soil fertility, also Azotobacter sp. which produces biosurfactant. The purpose of this research was to determine the effects of biofertilizers and doses of Azotobacter sp. on enhancing of petroleum hydrocarbon biodegradation efficiency, nitrogen fixing bacteria and phosphate solubilizing bacteria population, and total chlorophyll content in ramie leaves. This research was carried out from September 2016 to April 2017 at Laboratory of Soil Biology, Laboratory of Soil Fertility and Plant Nutrition, also Greenhouse and Field Station Faculty of Agriculture Universitas Padjadjaran. This research used factorial randomized complete block design with two factors consisted of biofertilizers (control, nitrogen fixing bacteria, phosphate solubilizing bacteria, phosphate solubilizing fungi, mychorrizal, and biofertilizer consortium) and doses of Azotobacter sp. (control, 1%, and 2%). The results of experiment showed there was an interaction effect between biofertilizer of phosphate solubilizing fungi and 2% dose of Azotobacter sp. on the enhancement of total chlorophyll content in ramie leaves.
Pertumbuhan Tanaman Kacang Tanah (Arachis hypogea L. Merril) Setelah Aplikasi Azotobacter chroococcum Dan Pupuk NPK Dewikusuma Ikhsani; Reginawanti Hindersah; Diyan Herdiyantoro
Agrologia Vol 7, No 1 (2018): Agrologia: Jurnal Ilmu Budidaya Tanaman
Publisher : Faculty of Agriculture, Pattimura University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30598/a.v7i1.351

Abstract

The combination of biological fertilizers and chemical fertilizers can support the concept of sustainable integrated farming and minimize the adverse impacts of chemical fertilizers. Azotobacter sp. is a soil microbe that used as a biological fertilizer because it can fix N and produce phytohormones which are crucial for plant growth. This research aims to study the growth of peanut plants after Azotobacter chroococcum and NPK fertilizer application. This research was conducted on July-November 2016 in field trials of PT. Pupuk Kujang, Cikampek, West Java with a height of 25 m above sea level. The experiments were performed using a randomized block design with three treatments, 2 L / ha Azotobacter chroococcum, 300 kg / ha of NPK and 2 L / ha Azotobacter chroococcum + 150 kg / ha of NPK with four replications. The results showed treatment with a dose of 2 L / ha Azotobacter chroococcum + 150 kg / ha of NPK fertilizer can increase the growth of plant height and root dry weight, whereas treatment with a dose of 300 kg / ha of NPK most improve plant shoot dry weight. Keywords: Azotobacter chroococcum, NPK, Plant Growth. 
Characterization and Potential of Plant Growth-Promoting Rhizobacteria (PGPR) Isolates Capacity Correlating with Their Hydrocarbon Biodegradation Capability Pujawati Suryatmana; Mieke Rochimi Setiawati; Diyan Herdiyantoro; Betty Natalie Fitriatin; Nadia Nuraniya Kamaluddin
AGRIVITA, Journal of Agricultural Science Vol 44, No 3 (2022)
Publisher : Faculty of Agriculture University of Brawijaya in collaboration with PERAGI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17503/agrivita.v41i0.3773

Abstract

The aim of this research is to find the characteristics of three PGPR isolates—Azospirillum sp., Bacillus sp., and Pseudomonas sp.: First, by profiling their characteristics in a liquid bioremediation system and secondly by measuring their performance as a bioagent in a soil phytoremediation system using ramie plant (Boehmia niviea L.). A Randomized Block Design in triplicate is used: (1) a Nitrogenfree medium with mineral media containing 1% (wt/v) petroleum hydrocarbons; and (2) 1% (wt/v) glucose medium as control. We tested their petroleum-degrading capacity, nitrogenase activity, phytohormones production, and ramie plant growth. The results showed that both Pseudomonas sp. (98.7%, 81.78% degradation efficiency) and Azospirillum sp. (93.80%, 83.70%) were the superior candidate in both systems. They both show reduced but adequate phytohormone production, managing to improve ramie plant growth. Both also showed reduced but sufficient nitrogen fixing capabilities to improve hydrocarbon degradation activity effectively. Meanwhile, Bacillus sp. has the lowest biodegradation capabilities (84.07%; 78.6%) and lowest nitrogenase activity, while failing to improve plant growth. Therefore Bacillus sp. would be more beneficial in a bacterial consortium where its characteristics (high IAA production) can be coupled with other isolates that can offset its lack of phytohormone or nitrogenase activity.
Potential use of PGPR based biofertilizer for improving the nutrient availability in soil and agronomic efficiency of upland rice Rahma Tia Harahap; Diyan Herdiyantoro; Mieke Rochimi Setiawati; Isna Niar Rahmatul Azizah; Tualar Simarmata
Kultivasi Vol 21, No 3 (2022): Jurnal Kultivasi
Publisher : Universitas Padjadjaran

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24198/kultivasi.v21i3.40061

Abstract

AbstractPresent study aimed to perform literature review to investigate the current status and potential use of plant growth promoting rhizobacteria (PGPR) for enhancing the soil plant’s health, plant growth and productivity in sustainable ways. The Systematic Literature Review (SLR) methods was applied according to Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) on published scientific literature from 2012-2022. Results revealed that genus diversity of PGPR (Bacillus sp., Serratia sp., Streptomyces sp., Pseudomonas sp., and Burkholderia sp.) produce siderophore and phytohormones such as indole-3-acetic acid (IAA), gibberellin (GAs), auxin, and 1-aminocyclopropane-1-carboxylic acid (ACC) deaminase activity, organic acids, biocontrol agent that contribute to the improvement of nutrient bioavailability (nitrogen fixing, phosphate solubilizing and Fe-uptake). The growth character of rice inoculated with biofertilizer and combined with 50% inorganic fertilizer produced no significant difference with pots that received 100% inorganic fertilizer. These results concluded that PGPR that produced phytohormone and siderophore could be developed as a potential bioagent or biofertilizer to improve the growth character and yield of upland rice (Oryza sativa L.) in dry environmental conditions.Keywords: PGPR producing phytohormone and siderophore, N2-fixer, Biofertilizer, Systematic review AbstrakKajian tinjauan pustaka ini dilakukan untuk menyelidiki status saat ini dan potensi penggunaan rizobakteri pemacu pertumbuhan tanaman (PGPR) untuk meningkatkan kesehatan tanah, pertumbuhan tanaman, dan produktivitas secara berkelanjutan. Metode Systematic Literature Review (SLR) diterapkan sesuai dengan Preferred Reporting Items for Systematic Review and Meta-Analyses (PRISMA) pada literatur ilmiah yang diterbitkan dari 2012-2022. Mesin pencari Google Scholar dan ScienceDirect dengan kata kunci yang tepat digunakan untuk memilih dan mengumpulkan jurnal ilmiah yang terindeks bereputasi dan digunakan sebagai referensi utama database. Hasil penelitian menunjukkan bahwa keragaman genus PGPR (Bacillus sp., Serratia sp., Streptomyces sp., Pseudomonas sp., dan Burkholderia sp.) menghasilkan siderophore dan memproduksi phytohormon seperti indole-3-acetic acid (IAA), giberelin (GAs), auksin, dan 1-aminocyclopropane-1-carboxylic acid (ACC) aktivitas deaminase, asam organik, agen biokontrol yang berkontribusi pada peningkatan bioavailabilitas nutrisi (pengikatan nitrogen, pelarutan fosfat, dan penyerapan Fe). Karakter tumbuh padi yang diinokulasi pupuk hayati dan dikombinasikan dengan pupuk kimia dosis 50% menghasilkan perbedaan yang tidak nyata dengan pot yang menerima pupuk anorganik 100%. Hasil ini menyimpulkan bahwa PGPR penghasil pitohormon dan siderophore dapat dikembangkan sebagai bioagent atau pupuk hayati yang potensial untuk meningkatkan karakter tumbuh dan hasil padi (Oryza sativa L.) gogo pada kondisi lingkungan yang kering.Keywords: PGPR produksi fitohormon dan siderofor, penambat-N2-fixer, biofertilizer, Systematic review
Efektifitas Azotobacter sp. Dan Pseudomonas sp. Pada tanaman sorgum (Shorgum bicolor L.) dalam proses fitoremediasi limbah minyak bumi Pujawati Suryatmana; Mieke Rochimi Setiawati; Nadia Nuraniya Kamaluddin; Diyan Herdiyantoro
Jurnal Agro Vol 9, No 2 (2022)
Publisher : Jurusan Agroteknologi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15575/20146

Abstract

 Interaksi sinergis antara tanaman-bakteri dapat digunakan untuk meningkatkan kinerja fitoremediasi tanah yang terkontaminasi hidrokarbon (HC). Penelitian bertujuan untuk karakterisasi plant growth promoting rhizobacteria: Azotobacter sp. dan Pseudomonas sp. dalam kinerja fitoremediasi limbah minyak bumi menggunakan tanaman sorgum (Sorghum bicolor L.). Penelitian menggunakan rancangan acak kelompok faktorial (RAK-Faktorial) terdiri dari inokulasi Azotobacter sp. sebanyak 0%, 1%, 2%, dan 3% per konsentrasi total petroleum hydrocarbon (TPH), dan inokulasi Pseudomonas sp  0%, 1%, 2%, dan 3% per TPH. Hasil penelitian menunjukkan bahwa tidak ada interaksi antara inokulasi Azotobacter sp. dan Pseudomonas sp. terhadap seluruh variabel respon. Namun, efek mandiri terlihat pada efisiensi biodegradasi HC, yaitu inokulasi Azotobacter sp dosis 3% berbeda secara signifikan dengan kontrol pada fase ke 4 minggu setelah tanam (MST), tetapi tidak signifikan pada fase 14 MST. Inokulasi Pseudomonas sp. tidak memberikan efek yang signifikan antar perlakuan terhadap efisiensi biodegradasi HC pada dua periode pengamatan. Populasi Azotobacter sp. dan Pseudomonas sp. menurun pada periode 4 MST, selanjutnya meningkat  pada periode 14 MST. Pertumbuhan tanaman sorgum mengalami retardasi selama 14 MST. Residu hidrokarbon terakumulasi lebih tinggi di bagian akar daripada di bagian tajuk tanaman. Azotobacter sp. dan Pseudomonas sp. berperan sebagai binding agent yang dapat menghambat serapan hidrokarbon oleh akar sorgum.ABSTRACTThe synergism interaction between plant-bacteria can be used to improve performance of phytoremediation hydrocarbon (HC) contaminated soil. The study aimed to characterize  Azotobacter sp. and Pseudomonas sp. in petroleum phytoremediation performance using sorghum (Sorghum bicolor L). The research used a randomized block design with two factors: Azotobactersp. inoculation 0%, 1%, 2% and 3% per total petroleum hydrocarbon (TPH) concetration, and Pseudomonas sp inoculation:  0%, 1%, 2% and 3% per TPH concentration. The results showed there was no interaction between Azotobacter sp. and Pseudomonas sp. inoculation to each response variable. The independent effect of 3% Azotobacter sp. to biodegradation HC efficiency was significantly different from the control at phase 4 weeks after planting (WAP), but not significantly different at phase 14 WAP. Pseudomonas sp. effect did not show a significantly different between treatments on the hydrocarbon biodegradation efficiency in the two observation periods. Azotobacter sp. and Pseudomonas sp. population decreased at period 4 WAP, then increased at period 14 WAP. The Sorghum growth was retarded during 14 WAP. Hydrocarbon residues accumulated higher in the roots than in shoot. Azotobacter sp. and Pseudomonas sp. act as a binding agent that can inhibit the hydrocarbons uptake by sorghum roots.
Reaksi Hipersensitif Daun Tembakau oleh Isolat Bakteri Pelarut Kalium pada Praformulasi Pupuk Hayati Diyan Herdiyantoro; Mieke Rochimi Setiawati; Tualar Simarmata
Soilrens Vol 20, No 2 (2022)
Publisher : Dept Ilmu Tanah & Sumberdaya Lahan Fakultas Pertanian Universitas Padjadjaran

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24198/soilrens.v20i2.45266

Abstract

The fruitfulness of biofertilizer application in increasing plant growth and yield is when the formulation uses selected microbial isolates that do not cause disease to plants. Hypersensitivity test is carried out to ensure that the microbial isolates used in the formulation of biofertilizer are not pathogenic to plants. The purpose of this study was to determine the pathogenicity of three selected potassium solubilizing bacteria (KSB) isolates (BPK-DHJ3-3150[17], BPK-DHJ1-4125[2], and BPKDHJ2-5250[16]) isolated from the maize plant rhizosphere on Inceptisols Jatinangor. The research was conducted using a qualitative experimental method that obtained data in the form of visual photos. The three selected KSB isolates were inoculated on tobacco leaves and observed for necrosis symptoms. The experimental results showed that the three selected KSB isolates did not cause a positive hypersensitivity reaction in tobacco leaves, which was indicated by the absence of necrosis symptoms at the leaf location where the KSB isolates were inoculated. The three KSB isolates were nonpathogenic isolates to plants.
Pengaruh Pupuk Hayati Berbasis Azolla terhadap Nitrogen Tanah, Nitrogen Tanaman, Populasi Azotobacter, dan Hasil Tanaman Mentimun Pada Inceptisol Jatinangor Mieke Rochimi Setiawati; Evi Entang Fatimah; Diyan Herdiyantoro; Apong Sandrawati; Uum Umiyati; Pujawati Suryatmana
Soilrens Vol 20, No 2 (2022)
Publisher : Dept Ilmu Tanah & Sumberdaya Lahan Fakultas Pertanian Universitas Padjadjaran

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24198/soilrens.v20i2.45271

Abstract

The low productivity of cucumber plants in Indonesia can be caused by several factors, one of which is fertilization. Fertilization on Inceptisol soil which has a low nitrogen content is needed to increase cucumber crop yields. The use of inorganic fertilizers is limited to avoid environmental pollution, so the use of biofertilizers can be an environmentally friendly option. The purpose of this study was to determine the effect of concentration and interval application of azolla extract based biofertilizer on the total soil N, plant N content, Azotobacter population and cucumber yield. The experiment was carried out from August to November 2021 at the Ciparanje Experimental Garden, Faculty of Agriculture, Padjadjaran University. This experiment used a Completely Randomized Block Design of a combination concentrations (0, 5, 10, 15, 20 mL.L-1) and time of application (1, 2, 3 times). The results showed that the application of azolla extract based biofertilizer with different concentrations and application times had a significant effect on the azotobacter population but had no significant effect on soil nitrogen levels, plant nitrogen concentrations, and cucumber yields. The addition of 20 mL/L 2 times application of azolla-based biofertilizer increased cucumber fruit weight by 35.97% compared to control but did not cause a significant increase in yield
Pengaruh Pupuk Hayati dan Briket Amelioran terhadap Pertumbuhan Tanaman Padi pada Tanah Salin Mieke Rochimi Setiawati; Syifa Nabila Kurnia; Pirda Nurhopipah; Anas Ramdhani; Pujawati Suryatmana; Diyan Herdiyantoro; Tualar Simarmata; Betty Natalie Fitriatin
Jurnal Agroekoteknologi Vol 15, No 1 (2023)
Publisher : Jurusan Agroekoteknologi Fakultas Pertanian Untirta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33512/jur.agroekotetek.v15i1.19763

Abstract

Utilization of saline land as an effort to increase rice productivity is still constrained by the adverse effects of salinity stress. The solution to this effort can be done by utilizing PGPR biofertilizers and applying ameliorant briquettes. The purpose of this study was to evaluate the effect of using biofertilizers and ameliorant briquettes on saline soils with various levels of salinity on the growth of rice plants. This research was conducted at the Ciparanje Jatinangor screen house from September 2022 to January 2023. The research design used was a randomized block design with 12 treatments and 3 replications. The treatment applied was PGPR biofertilizer, ameliorant briquettes, and their combination on saline soil 4 and 8 dS m-1 compared to control (non-saline soil). The results showed that PGPR biofertilizer increased the height of rice plants on saline soils 4 and 8 dS m-1 7 DAP. At 14 DAP, PGPR biofertilizer, ameliorant briquettes, and their combinations did not increase rice plant height, root length and volume, wet weight, and dry weight of rice plants, although the application of biofertilizers, ameliorant briquettes, and their combinations tended to increase wet weight and dry weight of rice plant compared to soil with the same salinity without biofertilizers and ameliorant briquettes.
Co-Authors Ade Setiawan Agung Muhammad Yusuf Akustu, Masako Alia Halimatusy Anas Ramdhani Anne Nurbaity Apong Sandrawati Benny Joy Benny Joy Betty Natalie Fitriatin Dewikusuma Ikhsani Dewikusuma Ikhsani Adhiningtyas Dian E. Kkartiwa Diyah Sri Utami Elin Karlina Emma Trinurani Sofyan Evi Entang Fatimah Fadhilla Oktavianingtyas Trisilvi Frahdian, Tommy Frahdian, Tommy Gea Anggun Pratiwi Halimah, Ummu ‘Azizah Iin Handayani Irwandhi, Irwandhi Isna Niar Rahmatul Azizah Isnaniar Rahmatul Azizah Jajang Sauman Hamdani Khumairah, Fiqriah Hanum Lubis, Ary Satria Mahfud Arifin Maya Damayani Maya Damayanti Mieke Rochimi Setiawati Nadia Nuraniya Kamaluddin Nenny Nurlaeny Noor Istifadah Oviyanti Mulyani Pirda Nurhopipah Pudjawati Suryatmana Pujawati Suryatmana Rahma Tia Harahap Rahma Tia Harahap Reginawanti Hindersah Richard A. Gunawan Rija Sudirja Suryatma, Pujawati Syifa Nabila Kurnia Toto Sunarto Tualar Simarmata Uum Umiyati Veni Takarini Windy Amorita Zahra Ilmiyati Zulia Hasratiningsih, Zulia