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All Journal Jurnal Ilmu Pertanian Indonesia Jurnal Fitopatologi Indonesia Jurnal Hortikultura Indonesia (JHI) Journal of Tropical Life Science : International Journal of Theoretical, Experimental, and Applied Life Sciences The Journal of Experimental Life Sciences (JELS) Berkala Ilmiah Pertanian Jurnal Produksi Tanaman Biotropika Journal of Degraded and Mining Lands Management Research Journal of Life Science Jurnal Sumberdaya Alam dan Lingkungan Journal of Tropical Plant Protection AGRIVITA, Journal of Agricultural Science JURNAL HAMA DAN PENYAKIT TUMBUHAN TROPIKA Jurnal Penelitian Pertanian Terapan JPT : JURNAL PROTEKSI TANAMAN (JOURNAL OF PLANT PROTECTION) BUANA SAINS Viabel : Jurnal Ilmiah Ilmu-Ilmu Pertanian Agro Bali: Agricultural Journal Nusantara Science and Technology Proceedings Jurnal HPT (Hama Penyakit Tumbuhan) International Journal of Agriculture System
Luqman Qurata Aini
Departemen Hama Dan Penyakit Tumbuhan Fakultas Pertanian Universitas Brawijaya
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Earth & Planetary Sciences Economics, Econometrics & Finance Engineering Environmental Science Immunology & microbiology Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Mathematics Medicine & Pharmacology Neuroscience Physics

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Virulency of Bacillus subtilis and Trichoderma harzianum Against Sprout Disease Pythium spp. in Cucumber Plants Minal Maimanah; Restu Rizkyta Kusuma; Luqman Qurata Aini
Journal of Tropical Plant Protection Vol. 2 No. 2 (2021)
Publisher : University of Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.jtpp.2021.002.2.1

Abstract

Sprout disease (damping off) is one of the important diseases that attack a variety of horticultural plants. Besides, sprouts disease can also attack seeds that have not germinated (preemergence damping-off). This study aimed to determine and compare the ability of B. subtilis and T. harzianum in controlling the pathogen Pythium spp. in cucumber plants. Phy01CK and Phy01IP isolates were use in the virulency test and inoculation methods of pathogens. The inhibition test between B. subtilis and T. harzianum against Pythium spp. was conducted in the in vitro test. This research was used a randomized block design with 13 treatments and three replications. The results of the antagonist's effect in vitro between T. harzianum and Pythium spp. showed the highest suppressing growth of Pythium spp. which is 70%. B. subtilis, B. subtilis + T. harzianum and fungicides each having a zone of inhibition of 23%, 32% and 46%. In the in vivo tests, the application of biological agents with 3 different times was not affecting the incidence of damping-off disease at 10 days after planting.
Screening of Trichoderma spp. isolates based on antagonism and chitinolytic index against Xylaria sp. Wiwit Wicaksono Jati; Abdul Latief Abadi; Luqman Qurata Aini; Syamsuddin Djauhari
Jurnal Hama dan Penyakit Tumbuhan Tropika Vol. 22 No. 1 (2022): MARCH, JURNAL HAMA DAN PENYAKIT TUMBUHAN TROPIKA: JOURNAL OF TROPICAL PLANT PE
Publisher : Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jhptt.12255-67

Abstract

Sugarcane disease disturbance is one of the limiting factors in achieving high productivity. Xylaria sp. has become endemic to sugarcane plantations in Lampung and South Sumatra. The intensity of disease attacks in Indonesia by 25% and 26% can reduce sugar production 12.3 and 15.4%, respectively. Losses due to disease attacks are greater in ratoons because plant cane sugarcane which is attacked by this disease, in ratoon stage, there will be a decrease in the number of shoots. The aim of this study was to obtain isolates of Trichoderma spp. which have antagonistic abilities and have chitinase enzymes so that they are effectively used as biological agents against Xylaria sp. The research method of antagonist test used dual culture test and qualitative test of chitin substrate was used to assess the chitinolytic index of four isolates of Trichoderma spp. The parameters were the inhibition of Trichoderma spp. isolates and the chitinolytic index of the four isolates moreover the value of the chitinase enzyme activity of the selected isolates. Mechanism of antagonist T10 are competition, antibiosis and mycoparasitism. The results showed that the Indonesian Sugar Research Institute (ISRI) T10 isolate could be used as a biological agent against Xylaria sp. The isolate had an inhibitory ability 73.33% with a chitinolytic index value 1.15 and the activity value of the chitinase enzyme crude extraction at a dilution 10-1 was 10.99 units/mL.
The Effectiveness Comparison Between Application of Indigenous Arbuscular Mycorrhizal Fungal Community and Stenotrophomonas maltophilia to Suppress Fusarium Wilt Incidence on Local Garlic Plant (Lumbu Hijau) Rifani Rusiana Dewi; Syarifah Maulidya Rahmah; Ardiyan Taruna; Luqman Qurata Aini; Ito Fernando; Abdul Latief Abadi; Muhammad Akhid Syib’li
AGRIVITA, Journal of Agricultural Science Vol 45, No 1 (2023)
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.v45i1.3970

Abstract

Wilt disease caused by Fusarium oxysporum is one of the most serious plant diseases in the world. There is no effective contol for. This study investigated the potential of arbuscular mycorrhizal and bacterial antagonists to control F. oxysporum through in vitro and in vivo studies. In this study, the antagonistic bacteria Stenotrophomonas maltophilia was isolated from mycorrhizal propagation media. Antagonist bacteria S. maltophilia showed antagonistic ability against F. oxysporum with an inhibition zone of 17.9 cm. Antagonistic bacteria and mycorrhizae used in this study significantly reduced the incidence of fusarium wilt in in vivo experiments. It was found that mycorrhizal and S. maltophilia inoculation showed disease incidence rates at 40% and 47.6%. While in the control treatment the incidence of disease reached 90.3%. The biocontrol agents of S. maltophilia and mycorrhizae have a promising prospective strategy to protect garlic plants. These results are expected to provide new insights for sustainable crop protection systems.
Screening of Rhizosphere Bacteria from Clove (Syzygium aromaticum) in Tidore Island as Plant Growth Promoting Rhizobacteria Ismat Ishak; Tri Ardyati; Luqman Qurata Aini
The Journal of Experimental Life Science Vol. 8 No. 3 (2018)
Publisher : Postgraduate School, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1176.245 KB) | DOI: 10.21776/ub.jels.2018.008.03.04

Abstract

Tidore Island in North Maluku Province is one of the clove (Syzygium aromaticum) producing regions. Clove plant fertility is maintained even though it is not given organic and inorganic fertilizers, it also keeps the fertility of the soil and the environment as a whole. Therefore, this study aims to explore bacteria in the rhizosphere of the clove trees planted in Tidore island as biofertilizer agents of Indol-3-Acetic Acid (IAA) production, phosphate solubilization, and ammonium production. Bacteria were isolated from the rhizosphere of clove trees. Screening of the isolates was done according to qualitative and quantitative methods. Data collection of the qualitative method were based on medium color changes for each variable while that the quantitative method (i.e. the concentrations of produced IAA, solubilized phosphate, and produced ammonium) were obtained based on spectrophotometry. The results obtained 110 bacterial isolates. Nineteen bacteria were potential as biofertilizer agents, of which isolate R11, R8P, and A1N showed the highest in IAA production (8.71 μgL-1), phosphate solubilization (8.37 μgL-1), and ammonium production (11.71 μgL-1), respectively. The three isolates respectively have similarities to the genus of Enterobacter, Burkholderia, and Stenotrophomonas. Keywords: Biofertilizer, Clove, Rhizobacteria, Rhizosphere.
POTENTIAL ENTOMOPATHOGENIC BACTERIA ISOLATED FROM EXTREME CONDITION AREA SIDOARJO MUD, INDONESIA AGAINST Spodoptera litura FAB (LEPIDOPTERA: NOCTUIDAE) Tita Widjayanti; Luqman Qurata Aini; Restu Rizkyta Kusuma; Istiqomah Istiqomah
BUANA SAINS Vol 23, No 1 (2023)
Publisher : Universitas Tribhuwana Tunggadewi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33366/bs.v23i1.4554

Abstract

Biological control by using entomopathogenic bacteria shows potential to be developed as an alternative technique to control Spodoptera litura. Bacteria that can live in extreme environments are reported to have high efficiency and the ability to survive in various environmental conditions, such as in the area of Sidoarjo mud. Related to the issue, this research aimed to find out bacteria that can survive in extreme conditions and are potentially entomopathogenic to control S. litura. The study was conducted from January until July 2021 in the Sidoarjo mud area and laboratory of Biological Control, Faculty of Agriculture, University of Brawijaya. The research was conducted using methods including consist of a sampling of Sidoarjo hot mud, isolation, and screening of bacteria that is potential as entomopathogenic bacteria, bioassay of mortality S. litura, development of larvae and pupal using Completely Randomized Design with 11 treatments and 4 replications, and molecular identification by 16S rRNA. Data for mortality and development of larvae and pupal were submitted to variance analysis, followed in comparison to the averages of the Duncan test at a 5% level of significance. The results showed that 43 colony bacteria from Sidoarjo hot mud have been successfully isolated and obtained 9 isolates selected as entomopathogenic bacteria against S. litura with a percentage of mortality larvae reached 60%. Moreover, bacteria have the potential to inhibit the development of larvae and pupal S. litura. Molecular identification showed that potential isolates are Bacillus subtilis strain 15A-B92, Bacillus thuringiensis strain GTG-29, and Bacillus anthracis strain BA1035.
The effect of halotolerant bacteria isolated from saline soil on the growth and yield of maize in saline soil Nurul Aini; Wiwin Sumiya Dwi Yamika; Nindi Kurniasari; Agung Nugroho; Luqman Qurata Aini
Journal of Degraded and Mining Lands Management Vol 10, No 3 (2023)
Publisher : Brawijaya University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15243/jdmlm.2023.103.4341

Abstract

Salinity is a common problem of abiotic stress in the world. Salinity stress causes yield loss in cultivated crops, such as maize. The yield of maize exposed to salinity stress can be increased with the application of some beneficial microorganisms. Three isolates of halotolerant bacteria from saline fields can potentially be used as biostimulants (plant growth-promoting rhizobacteria). A field experiment to study the effect of halotolerant bacteria isolates application on the growth and yield of maize (Zea mays L.) in saline soil was arranged in a randomized block design with a combination of isolate types and frequency applications, and it was repeated three times. In this study, four bacterial strains used were SN13 (Streptomyces sp.), SN22 (Bacillus megaterium), SN23 (Bacillus sp.) and SN26 (Bacillus aryabhattai) isolated from the soil of saline-prone regions of Lamongan, in coastal East Java, Indonesia. Results indicated that an application of halotolerant bacteria was able to improve the yield and nutrient uptake of maize in saline soil. However, the application of halotolerant bacteria significantly improved leaf total chlorophyll content (105.94%), plant dry weight (56.14%), Grain weight per cob (108.11%) and had a positive trend in increasing N uptake (61.19%), and Na uptake (73.09%) compared to control. It is concluded that the application of halotolerant bacteria is able to alleviate the salinity stress of maize in saline soil.
In vitro evaluation of the effect of combined indigenous antagonistic bacteria against Fusarium oxysporum Gallyndra Fatkhu Dinata; Luqman Qurata Aini; Abdul Latief Abadi
International Journal of Agriculture System VOLUME 11 ISSUE 1, JUNE 2023
Publisher : Hasanuddin University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20956/ijas.v11i1.4330

Abstract

This study aimed to evaluate the potential of combined indigenous antagonistic bacteria against Fusarium oxysporum f.sp. cepae by in vitro. These bacteria were originated from coffee plant litter in UB Forest and already known their ability as a single biocontrol against F. oxysporum. The research was conducted at the Plant Disease Laboratory, Department of Plant Pests and Diseases, Brawijaya University. The methods consisted of isolate preparation, pathogenicity test and in vitro antagonistic test using a modified multiple culture method. The study was conducted with eight treatments and four replications.  Based on this study, there were four best treatments in inhibiting the mycelia growth of F. oxysporum more than 50% compared to the control. The highest inhibitory was Bacillus mycoides and Alcaligenes faecalis which were able to inhibit F. oxysporum up to 67,46%. This study proves the potential of a new combination of indigenous antagonistic bacteria to inhibit fusarium wilt disease.
Diversity of Culturable Bacterial Gut Microbiome of Oryctes rhinoceros Larvae and Their Potency as Source of Protease and Lipase Enzymes Luqman Qurata Aini; Fibrianti Shinta Dewi; Irisa Trianti; Ito Fernando; Yogo Setiawan
AGRIVITA Journal of Agricultural Science Vol 45, No 3 (2023)
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.v45i3.4316

Abstract

Oryctes rhinoceros is an important pest of various coconut and palm species. Studies on the bacterial gut microbiome of O. rhinoceros larvae and their potential use as producers of industrial enzymes are still limited. This study aims to examine the diversity and abundance of culturable bacterial microbiome in the gut of O. rhinoceros and their potential to produce protease and lipase. This study consisted of several stages, i.e., collection of O. rhinoceros larvae from coconut plantations; isolation of culturable bacteria from larval gut; protease and lipase enzyme activity assays; and partial characterization of culturable gut bacteria in terms of morphology, physiology, and biochemistry. There were seven bacteria that were isolated from the gut of O. rhinoceros, which were differentiated by their morphotype. The seven bacterial isolates also showed variations in physiological, and biochemical characteristics, and the larval guts were dominated by Gram-positive bacteria. The Shannon diversity index was 1.33, evenness was 0.682, richness was 7, and the abundance of each type of bacteria varied between 2x105 and 9.1x1010. Bacteria UBOG1, UBOG3, and UBOG5 were able to produce protease, but all seven bacteria were unable to produce lipase. Thus, bacterial isolates UBOG1, UBOG3, and UBOG5 are potential to be used in industry.
POTENSI BAKTERI Bacillus subtilis DAN Pseudomonas fluorescens DALAM MENGINDUKSI KETAHANAN TANAMAN TOMAT TERHADAP PENYAKIT LAYU FUSARIUM: THE POTENTIAL OF Bacillus subtilis AND Pseudomonas fluorescens BACTERIA IN INDUCTING THE RESISTANCE OF TOMATO PLANTS AGAINST FUSARIUM WILT DISEASE Taruna, Ardiyan; Aini, Luqman Qurata; Syib’li, Muhammad Akhid
Jurnal HPT (Hama Penyakit Tumbuhan) Vol. 12 No. 2 (2024)
Publisher : Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.jurnalhpt.2024.012.2.5

Abstract

Tanaman tomat merupakan salah satu jenis tanaman hortikultura yang banyak digemari oleh masyarakat Indonesia. Buah tomat banyak digunakan sebagai bahan bumbu masakan. Akan tetapi, terdapat faktor pembatas dalam produksi buah tomat, yakni adanya penyakit layu fusarium yang disebabkan oleh patogen Fusarium oxysporum. Pengendalian hayati menggunakan bakteri Plant Growth Promoting Rhizobacteria (PGPR) seperti Bacillus subtilis dan Pseudomonas fluorescens dapat menjadi solusi pengendalian yang aman. Penelitian ini bertujuan untuk mengetahui pengaruh pemberian bakteri PGPR dalam meningkatkan pertumbuhan dan meningkatkan ketahanan tanaman melalui mekanisme induksi ketahanan. Berdasarkan hasil penelitian aplikasi bakteri B. subtilis dan P. fluorescens memiliki kemampuan dalam melarutkan fosfat, serta meningkatkan pertumbuhan tanaman tomat meliputi tinggi tanaman dan jumlah daun yang lebih baik dibandingkan kontrol. Aplikasi bakteri baik secara tunggal maupun konsorsium juga dapat menghambat kejadian penyakit layu fusarium dengan nilai insidensi kejadian terendah pada aplikasi bakteri konsorsium yaitu 27.50%. Akan tetapi aplikasi kedua bakteri tersebut tidak menunjukkan pengaruh yang nyata dalam meningkatkan indikator dari ketahanan induksi, yakni kandungan total fenolik dan aktivitas enzim Phenylalanine Ammonia Lyase (PAL).
UJI POTENSI JAMUR PENGHASIL IAA SEBAGAI PENGENDALI HAYATI PATOGEN LAYU Fusarium oxysporum PADA TANAMAN CABAI: INVESTIGATING THE POTENTIAL OF IAA-PRODUCING FUNGUS AS A BIOLOGICAL CONTROL OF FUSARIUM WILT ON CHILI Khoirunisa, Fenti Rahma; Sektiono, Antok Wahyu; Djauhari, Syamsuddin; Aini, Luqman Qurata
Jurnal HPT (Hama Penyakit Tumbuhan) Vol. 12 No. 1 (2024)
Publisher : Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.jurnalhpt.2024.012.1.3

Abstract

Pemanfaatan mikroba antagonis sebagai agens pengendali hayati penyakit tumbuhan telah banyak dilakukan. Diketahui beberapa jamur antagonis mampu menghasilkan hormon Indole Acetic Acid (IAA) sehingga memiliki peranan yang lengkap dalam menunjang pertumbuhan tanaman karena dapat bertindak sebagai bioprotectant dan biofertilizer. Saat ini berbagai upaya untuk meningkatkan efektifitas pengendalian dengan agens hayati terus dilakukan guna mendapatkan cara pengendalian hayati yang efektif dan efisien sehingga memiliki daya tarik bagi pelaku budidaya pertanian. Penelitian ini bertujuan untuk mengetahui potensi jamur penghasil IAA dalam meningkatkan pertumbuhan tanaman serta menghambat patogen Fusarium oxysporum pada tanaman cabai. Penelitian ini menggunakan rancangan acak lengkap (RAL) dengan 4 perlakuan dan 5 kali ulangan. Hasil penelitian ini didapatkan kedelapan isolat jamur memiliki daya hambat lebih dari 60% dan persentase daya hambat tertinggi pada hari ketujuh terdapat pada isolat jamur G sebesar 80,89%. Sedangkan hasil uji IAA secara kualitatif menggunakan reagen Salkowski dari kedelapan isolat jamur didapatkan dua isolat jamur yang mengalami perubahan warna menjadi merah muda yaitu isolat jamur AMR dan AR dengan konsentrasi masing-masing sebesar 22,29 ppm dan 11,65 ppm. Penelitian yang dilakukan di Rumah Kaca didapatkan hasil bahwa perlakuan P1 pada 7 MST efektif untuk meningkatkan tinggi tanaman dan perlakuan P2 pada 7 MST efektif menambah jumlah daun tanaman cabai rawit. Selain itu, semua perlakuan jamur antagonis berpotensi sebagai agens hayati dengan perlakuan P3 memiliki intensitas penyakit terendah pada 7 MST sebesar 10%.
Co-Authors Abd Latif Abadi Abd Latif Abadi Abdul Cholil Abdul Cholil Abdul Karim Fanani Abdul Latief Abadi Abdul Latief Abadi Abdul Latief Abadi Achmad Noerkhaerin Putra Achmad Roekhan Adi Setiawan Agung Nugroho Agung Wahyu Susilo Aini Nurul Aini, Febrilia Nur Akhmad Rizali Albert Fernando Sitorus Alda Dwi Aprilia Alfi Inayati Aminudin Afandhi Aminudin Afandhi Anastasya, Nabilla Alya Andhy Handoko Andhy Handoko Anton Muhibuddin Apriyani, Aliffia Nuraita Ardiyan Taruna Arifah, Fitri Ariffin Noor Sugiharto Arifin Noor Sugiharto Aris Budiman Asnawi Asnawi Asparita, Yulia Dwi Auliya Zendhabad Aulya Retno Setyari Aulya Retno Setyari Bayu Setyawan, Bayu Berliana, Sonia Bogi Diyansah Bosha, Mohammed Cindy Diah Ayu Fitriana Cokorda Javandira Cokorda Javandira Daniel Happy Putra Dayanti, Ayu Ike Dewi, Fibrianti Shinta Dian Eka Kusumawati Dianti, Sylvia Dianti, Sylvia Herli Dinata, Gallyndra Fatkhu Diyana Lestari Dwi Wulandari Dyah Ayu Kusuma Wardani Eka Kartini Eriyanto Yusnawan Eriyanto Yusnawan Fibrianti Shinta Dewi Firdausi, Wita Galuh Setyanto Pradana Galuh Setyanto Pradana Ganestya Indina Sari Ganestya Indina Sari Hagus Tarno Hapsari, Femita Hasanah, Ifa Maulidah Husna Fikriya Baroroh I Made Indra Agastya Ichsan Firmansyah Imam Chanif Imam Chanif, Imam Indah Anita Sari Irisa Trianti Irisa Trianti Ismat Ishak Istiqomah Istiqomah Istiqomah, Istiqomah Ito Fernando Ito, Satoshi Iva Dewi Lestariningsih, Iva Dewi Izza, Junda Fauzul Karuniawan Puji Wicaksono Kestrilia Rega Prilianti Khoirun Enisa Maharina Khoirun Enisa Maharina Khoirunisa, Fenti Rahma Kusuma, Restu Rizkyta Liliek Sulistyowati Lilis Suryani Ma'alifah, Nur Maharina, Khoirun Enisa Minal Maimanah Mintarto Martosudiro Mochammad Syamsul Hadi Mochammad Syamsul Hadi Muhammad Akhid Syib’li Muhammad Akhid Syibli Muhammad Febriansyah Muhidin, Ahmad Nava Karina Nindi Kurniasari Novia Dwirani Novie Utami Asputri Nugroho Sulistyo Putro Nugroho Sulistyo Putro Nur Azizah Nurul Aini Nurul Aini Nurul Aini Nurul Aini Oktaviani, Rahmania Pamungkas, Bayu Aji Paramyta Nila Permanasari, Paramyta Nila Prabowo, Matheus Randy Prillianti, Kestrillia Rega Puput Wahyuningsih Rachmi Masnilah Rahmadani, Pradina Rahman, Fakih Nur Ramadhan, Varotama Putra Ramadhani, Fatchuliani Safitri Rania, Khansa Diva Ratri Kusuma Devi Ratri Kusuma Devi Rida Iswati Rifani Rusiana Dewi Rina Rachmawati Rina Rachmawati Roekhan, Achmad Rudin, Sofyan Sudirman Saitama, Akbar Sallygresya Theodora Dwifelita Matondang Santoso, Verisca Agil Winanda Sektiono, Antok Wahyu Serdani, Army Dita Setyono Yudo Tyasmoro Sheila Desi Kharisma Sheila Desi Kharisma Silfiani, Intan Siska Irhamnawati Pulogu Soemarno Soemarno Suharjono Sukmarani, Elok Syamsuddin Djauhari Syamsul Arifin Syarifah Maulidya Rahmah Syib'li, Muhammad Akhid Syibli, Muhammad Akhi Syib`li, Muhammad Akhid Syib’li, Muhammad Akhid Taruna, Ardiyan Tatiek Wardiyati Theresia Rani Kartika Ayu Tita Widjayanti Toto Himawan Toto Himawan Tri Ardiyati Tri Ardiyati Tri Ardyati Trisnawati, Luh Putu Adi Tutung Hadi Astono Tutung Hadiastono Tutung Hadiastono Udayana, Cicik Uma Khumairoh Wardiyati, Tatiek Wita Firdausi Wiwik Jatnika Wiwin Sumiya Dwi Yamika Wiwin Sumiya Dwi Yamika Wiwin Sumiya Dwi Yamika Wiwit Wicaksono Jati Yani Kurniawan, Yani Yogo Setiawan Zainudin Zainudin Zainudin Zainudin Zainul Abidin