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Analisis Vegetasi di Kawasan Karst Provinsi Gorontalo Ali, Fathur Rahman M.; Katili, Abubakar Sidik; Husain, Ilyas H.; Utina, Ramli; Kandowangko, Novri Y.; Hamidun, Marini Susanti
J-CEKI : Jurnal Cendekia Ilmiah Vol. 4 No. 2: Februari 2025
Publisher : CV. ULIL ALBAB CORP

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56799/jceki.v4i2.8292

Abstract

This study aims to determine the composition of vegetation types in the karst area of Gorontalo province and determine the vegetation structure in the karst area of Gorontalo province. The method used in this study uses the square transect method, the transect line is made perpendicular along 100 m, with the plot size being 20 x 20 m for tree strata, 10 x 10 m for pile strata, and 5 x 5 m for seedling strata, The results of vegetation structure analysis based on the highest INP value for tree-level strata at station I are Leucaena leucocephala species 2.20%, at Ceiba petandra station II 1.24%, and at Muntingia calabura station III 1.72%. At the stake level, the Leucaena leucocephala species had the highest INP value of the three stations, which was 1.81%. For the nursery rate, the highest INP is owned by the Leucaena leucocephala species at 2.10%. Based on the results of the analysis using ordinance charts, stations II and III have almost the same formation pattern so that the graph tends to overlap, while for station I it is very different from stations II and III, for station I it has its own formation pattern compared to stations II and III, and station I is also indicated to have its own characteristics based on habitat conditions and environmental factors.
Antagonistic Ability and Fungicide Tolerance of Rhizosphere Actinomycetes from the Hungayono Karst Ecosystem, Gorontalo Nazifah R Adam; Yuliana Retnowati; Abubakar Sidik Katili; Novri Youla Kandowangko; Wirnangsi D. Uno
Biology, Medicine, & Natural Product Chemistry Vol 15, No 1 (2026)
Publisher : Sunan Kalijaga State Islamic University & Society for Indonesian Biodiversity

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14421/biomedich.2026.151.895-905

Abstract

Actinomycetes show promise as biological control agents, reducing fungicide use in agriculture due to their bioactive compounds and ecological resilience. This study focused on the initial screening and ecological bioprospecting of actinomycetes from the Hungayono karst ecosystem in Gorontalo by determining their antagonistic activity against the pathogenic fungi Fusarium oxysporum and Neocosmospora solani, as well as their tolerance to the fungicides thiram and benomyl. Potential isolates were identified using molecular methods. Samples were collected from three locations. Rhizosphere soil samples were obtained from plant species: Alocasia macrorrhizos, Ficus microcarpa, and Acrostichum aureum L. Antagonistic activity against root-pathogenic fungi and tolerance to fungicides were used as initial screening criteria to assess their potential as biological control agents. This study successfully isolated 9 actinomycete isolates. The results showed that only 33% of the isolates exhibited inhibitory activity, with isolate RzAH-07 showing a moderate inhibition zone (5.22 mm) against Fusarium oxysporum and weak inhibition (4.18 mm) against Neocosmospora solani, while also demonstrating tolerance to the fungicide benomyl up to 1000 ppm. RzAH-07 was selected as the top candidate due to its two key advantages. Phylogenetic analysis based on 16S rRNA gene sequences indicates that RzAH-07 is closely related to the genus Streptomyces, with a similarity percentage ranging from 98.35% to 99.14% based on GenBank data.
Phosphate-Solubilizing and Indole Acetic Acid-Producing Actinomycetes from the Plant Rhizosphere in the Hungayono Karst, Gorontalo Yusriyah Yusriyah; Yuliana Retnowati; Abubakar Sidik Katili; Novri Youla Kandowangko; Wirnangsi D. Uno
Biology, Medicine, & Natural Product Chemistry Vol 15, No 1 (2026)
Publisher : Sunan Kalijaga State Islamic University & Society for Indonesian Biodiversity

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14421/biomedich.2026.151.907-917

Abstract

Actinomycetes are soil microorganisms that play a crucial role in nutrient cycles and interactions, particularly in nutrient-limited environments such as karst ecosystems. This study aimed to evaluate the preliminary functional potential of actinomycetes isolated from the plant rhizosphere in the Hungayono karst ecosystem, Gorontalo, as phosphate solubilizers and producers of indole acetic acid (IAA). The study employed a quantitative descriptive approach with soil sampling at a depth of 10–15 cm using purposive sampling. Isolation was performed using the spread plate method on Starch Casein Agar medium, followed by qualitative and quantitative testing of phosphate solubilization and IAA production capabilities. Identification of selected isolates was conducted through 16S rRNA gene-based phylogenetic analysis. The results showed that 11 actinomycete isolates were obtained from 4 host plants, of which two isolates exhibited low-index qualitative phosphate solubilization activity. However, quantitative results indicated that some isolates that did not form clear zones still produced measurable amounts of soluble phosphate, suggesting differences in method sensitivity. The highest phosphate-solubilizing activity was exhibited by isolate RzPO-09. In addition, four isolates were capable of producing IAA at varying levels, with the highest production observed in isolate RzPH-07 at 0.896 ppm. Phylogenetic analysis showed that isolate RzPO-09 (PZ458677) is closely related to the genus Pseudonocardia, while RzPH-07 (PZ458434) is closely related to the genus Streptomyces. Overall, the isolates obtained show initial functional potential; however, further validation is required through optimization of culture conditions, genetic characterization, plant growth tests, and testing both in greenhouses and in the field to ensure their practical feasibility.
AKTIVITAS ANTIBAKTERI ACTINOMYCETES DARI AKAR TANAMAN DI EKOSISTEM KARST GORONTALO, INDONESIA Alfandi Kibu; Yuliana Retnowati; Novri Youla Kandowangko; Wirnangsi Din Uno; Abubakar Sidik Katili; Nurdin
Jurnal Humaniora & Sosial Sains Vol 2 No 1 (2025)
Publisher : Pojok Publisher

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

Abstract

Several pathogenic bacteria such as Staphylococcus aureus, Escherichia, Pseudomonas aeruginosa and other pathogenic bacteria have developed resistance to many marketed antibiotics. Staphylococcus aureus is already resistant to several types of antibiotics such as penicillin, erythromycin, cefoxitin, levofloxacin, and clindamycin, Escherichia is resistant to several antibiotics such as Penicillin G, Cefotaxime, Tetracycline, Ampicillin, and Amoxicillin, Pseudomonas aeruginosa has been resistant to antibiotics that target ribosomes, such as tobramycin and tigecycline. The problem of resistance of several pathogenic bacteria can be overcome by finding new metabolite compounds from Actinomycetes microorganisms that have antibiotic potential by exploring extreme areas, one of which is in the karst area, especially in plant roots. Root sampling was carried out by taking samples + 20 cm on each type of plant found. Isolation of Actinomycetes bacteria was carried out using the plate method. Antibacterial activity testing was carried out using the line method. The morphological form of the spores was seen using a SEM (Scanning Electron Microscope). The results of the study found 2 isolates of isolated plant roots containing Actinomycetes bacteria. 2 isolates showed morphological characteristics of mycelium, oval and round in shape and had various colors. The results of the antibacterial activity test showed that each isolate could inhibit several types of pathogenic bacteria, seen from the clear zone with different diameters and the results of SEM (Scanning Electron Microscopy) showed that 2 isolates had the same character and shape of spores as Actinomycetes, namely the genus Streptomyces.
Symbiotic Efficiency of Arbuscular Mycorrhizal Fungi on the Growth Dynamics and Root Colonization of Waxy Corn (Zea mays L. var. ceratina) Yuniyarti Hulu; Novri Youla Kandowangko; Muhammad Isra; Jusna Ahmad; Yuliana Retnowati; Aisyah Ahmad; Wirnangsih D. Uno; Hayatiningsih Gubali
Journal of Tropical Mycorrhiza Vol. 5 No. 1 (2026): April
Publisher : Asosiasi Mikoriza Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58222/jtm.v5i1.116

Abstract

One of the important food crops in Gorontalo is corn (Zea mays L. var. ceratina), and root health is very important in determining its growth and productivity. This study aims to determine the root shoot-root ratio and root infection of waxy corn plants given arbuscular mycorrhizal fungi as biostimulants. This study was conducted from July to December 2025 using a completely randomized block design (RBD) with four different doses mycorrhizal arbuscular: 0, 10, 20, 30 g /polybag, which were replicated three times and observed periodically over 42 days after planting (DAP). The variables observed were root shoot-root ratio and root infection of plants at 14, 21, 28, 35, and 42 days after planting. The results showed that the application of mycorrhizae with different doses resulted in a root shoot ratio that increased in line with the increasing age of the plant. In contrast, it was interesting to find that in plant root infections, mycorrhizal application appeared to increase until the plants were 28 days after planting, after which it declined. This finding suggests that arbuscular mycorrhizal inoculation given to plants at different doses can impact root health, as indicated by the ratio of root decay to root infection. The symbiosis between mycorrhizae and plants is crucial for the growth of waxy corn.  
Response of Actinomycetes Inoculation to the Growth Rate of waxy Corn (Zea mays var. ceratina) Adelia Salsabila Rahman; Novri Youla Kandowangko; Wirnangsih D. Uno; Yuliana Retnowati; Devi Bunga Pagalla; Hayatiningsih Gubali; Muhammad Isra; Aisyah Ahmad
Journal of Tropical Mycorrhiza Vol. 5 No. 1 (2026): April
Publisher : Asosiasi Mikoriza Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58222/jtm.v5i1.119

Abstract

Waxy corn (Zea mays var. ceratina) is an important food crop whose growth and productivity are strongly influenced by nutrient availability and soil microbial activity. The use of Actinomycetes as a biological biostimulant has gained attention due to its potential to enhance plant growth in an environmentally sustainable manner. This study aimed to evaluate the response of waxy corn growth rate to different doses of Actinomycetes inoculation. The experiment was conducted from July to December 2025 using a Randomized Block Design (RBD) consisting of three treatments: without Actinomycetes application (PA0), 5 g Actinomycetes (PA1), and 10 g Actinomycetes (PA2), with three replications for each treatment. Plant growth observations were performed at 14, 21, 28, 35, and 42 days after planting (DAP). Growth rate was determined based on the increase in plant dry biomass over each observation interval. The results showed that Actinomycetes inoculation affected the growth rate of waxy corn. The PA2 treatment consistently exhibited higher and more stable growth rates compared with PA0 and PA1 throughout the observation period. The enhanced growth performance was likely associated with the role of Actinomycetes in improving nutrient availability and stimulating vegetative development. In conclusion, the application of 10 g Actinomycetes demonstrated the greatest potential to increase the growth rate of waxy corn and may serve as an effective biological biostimulant for sustainable crop production.
Antagonistic Ability and Fungicide Tolerance of Actinomycetes from the Rhizosphere of Maize (Zea mays L.) Plants in Gorontalo Danial Mohamad; Yuliana Retnowati; Novri Youla Kandowangko; Abubakar Sidik Katili; Wirnangsi Din Uno
Biology, Medicine, & Natural Product Chemistry Vol 15, No 1 (2026)
Publisher : Sunan Kalijaga State Islamic University & Society for Indonesian Biodiversity

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14421/biomedich.2026.151.1193-1201

Abstract

Actinomycetes are a group of microbes that live in the rhizosphere of plants and play an important role in soil microbial dynamics. This study aims to describe the antagonistic ability against pathogenic molds and tolerance to fungicides in actinomycetes from the rhizosphere of maize plants in Gorontalo. This research is descriptive uses a quantitative approach and employs a purposive sampling technique. Rhizosphere soil samples were collected from maize fields in the hilly area of Bontula Village, Asparaga District, Gorontalo Regency. The results showed the presence of 7 actinomycetes isolates with different morphological characteristics, namely RFZm-PG, RFZm-PLG, RFZm-PW, RFZm-PB, RFZm-PR, RFZm-PY, and RFZm-PO. Antagonistic tests showed that four isolates (RFZm-PB, RFZm-PG, RFZm-PLG, RFZm-PW) inhibited the growth of Fusarium oxysporum and Neocosmospora solani with an inhibition percentages of 66.38%-89%. The fungicide tolerance test showed that the seven isolates were tolerant to thiram, dimethomorph and benomyl, with the highest inhibitory effect by thiram. Isolates RFZm-PG and RFZm-PLG had the highest tolerance up to 500 ppm, while other isolates were tolerant only up to 400 ppm. Molecular analysis showed that RFZm-PG belongs to the genus Streptomyces (100% similarity with Streptomyces enissocaesilis), while RFZm-PLG belongs to Nocardiopsis (100% similarity with Nocardiopsis synnemataformans).
Distribution and Abundance of Actinomycetes in the Rhizosphere Soil of The Hungayono Karst Ecosystem, Gorontalo Apriliyanti Mohulaingo; Yuliana Retnowati; Abubakar Sidik Katili; Ani M. Hasan; Novri Youla Kandowangko
Biology, Medicine, & Natural Product Chemistry Vol 15, No 1 (2026)
Publisher : Sunan Kalijaga State Islamic University & Society for Indonesian Biodiversity

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14421/biomedich.2026.151.1363-1371

Abstract

Karst ecosystems have unique environmental conditions that can influence the presence of soil microorganisms, including Actinomycetes in the rhizosphere. This study aimed to determine the distribution and abundance of Actinomycetes in the rhizosphere soil of plants in the Hungayono karst ecosystem, Gorontalo. This study employed a quantitative descriptive method with an exploratory approach. Rhizosphere soil samples were collected from several plant species at three observation points: the lower, middle, and upper parts of the karst area. Actinomycetes were isolated using Starch Casein Agar, while their abundance was determined using the Total Plate Count method and expressed in CFU/g of soil. The results showed that actinomycetes were found at all observation points, with abundances ranging from 2 × 103 to 3 × 105 CFU/g. The highest abundances were found in the rhizosphere of Calamus spp., Anthocephalus macrophyllus, and Ficus microcarpa, while the lowest abundances were found in the rhizosphere of Alocasia macrorrhizos. The Actinomycetes isolates obtained exhibited morphological variation based on mycelium color and colony shape. These findings indicate that the distribution and abundance of Actinomycetes in the rhizosphere soil of the Hungayono karst ecosystem vary among plant species and observation sites. The plant rhizosphere in this karst ecosystem functions as a microhabitat that supports the presence of Actinomycetes and is relevant to studies of karst soil microbiology.
Konseptual Teoritis dan Implementasi Praktis Multimedia Interaktif dalam Pembelajaran Pendidikan Agama Kristen Sahat Patar Lumban Gaol; Hamzah B. Uno; Novri Y Kandowangko; Nina Lamatenggo
Jurnal Kewarganegaraan Vol 6 No 2 (2022): Desember 2022
Publisher : UNIVERSITAS PGRI YOGYAKARTA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31316/jk.v6i2.4016

Abstract

AbstrakSemangat belajar yang tinggi peserta didik berasal dari seorang guru yang mampu menciptakan iklim pembelajaran bermakna, berkualitas dan inovatif, yang mampu menarik perhatian peserta didik. Peserta didik akan terkesan dan termotivasi apabila pembelajaran dikemas melalui media interaktif. Peserta didik sudah lumrah dengan teknologi dan lebih tertarik dengan kemajuan teknologi jaman sekarang. Seorang guru yang berkompeten harus peka dan melihat kondisi perkembangan zaman masa kini, perlu mengevaluasi metode mengajar yang diterapkan. Teknologi sudah marak di dunia pendidikan dimanapun di seluruh dunia. Peran teknologi multimedia mendukung efektifnya pembelajaran dan peserta didik menjadi lebih bersemangat untuk terlibat dalam proses pembelajaran. Teknologi multimedia dimanfaatkan sebagai sarana untuk menciptakan dan mengembangkan pembelajaran. Pengajaran akan lebih menarik perhatian peserta didik, dapat mengoptimalkan hasil belajar yang maksimal. Pelajaran akan lebih jelas maknanya sehingga mudah dipahami. Dan peserta didik menguasai tujuan dari pembelajaran. Metode mengajar guru akan lebih bervariasi dan peserta didik dapat mengamati, menikmati, dan mengembangkan hasil dari informasi yang didapat. Peserta didik, mendapat pengalaman belajar yang berkesan. Informasi yang diterima dapat diingat lebih lama jika seorang guru mampu dengan tepat dalam pemanfaatan teknologi khususnya multimedia interaktif dalam pembelajaran pendidikan agama kristen.Kata Kunci: Multimedia, Pendidikan Agama Kristen
Pemberdayaan Masyarakat Desa Bihe, Kabupaten Gorontalo melalui Diversifikasi Kelapa Menjadi Virgin Coconut Oil dan Cocopeat Novri Youla Kandowangko; Muchtar Ahmad; Mustamin Ibrahim; Febriyanti
Agrokreatif: Jurnal Ilmiah Pengabdian kepada Masyarakat Vol. 10 No. 2 (2024): Agrokreatif Jurnal Ilmiah Pengabdian Kepada Masyarakat
Publisher : Institut Pertanian Bogor

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29244/agrokreatif.10.2.175-182

Abstract

Bihe Village is one of the villages in Asparaga District, Gorontalo Regency, which is a center for coconut production. The abundant potential of coconut plants has yet to be utilized optimally by the people of Bihe village. Coconuts are only produced as copra, or coconuts are sold whole, without processing. Coconut plants have many derivative products, such as virgin coconut oil (VCO) and coconut peat. This problem prompted the implementation of socialization, training, and assistance in making VCO and Cocopeat for the Bihe village community. The aim is to increase the community's insight and skills regarding the diversification of coconut products so that they can provide additional income, which can improve the economy in Bihe Village. The training method is the Participatory Action Research (PRA) method, which involves the active role of the Bihe village community. The stages carried out are analysis of the actual conditions of society, planning, action, observation, and reflection. This method is carried out to provide an understanding of a) the weaknesses they have, b) the community's desire to overcome their shortcomings and weaknesses, c) together with the community to develop strategies and methods to solve the problem, and d) help the community overcome, solve, and find a way out. Forty participants attended this training and mentoring. After implementing the empowerment program, the post-test results showed that 62.5% of the community gave an excellent assessment, and 37.5% gave a good assessment of the usefulness of this activity program. Furthermore, 72.5% of participants were motivated to open a new coconut commodity business.
Co-Authors Abubakar Sidik Katili Abubakar Sidik Katili Adelia Salsabila Rahman Adila Nindhaulhasanah Adju, Fitria Y.Hs. Ahaya, Cindi Ahmad Hidayat Ahmad, Aisyah Aisyah Ahmad Aisyah Ahmad Akbar, Muh Nur Alfandi Kibu Ali, Fathur Rahman M. Andi Pratiwi Andi Pratiwi Ani Hasan, Ani Ani M. Hasan Apriliyanti Mohulaingo Aryati Abdul Aryati Abdul Bakari, Iswanto Bambang Mamangkay Bulowe, Yuniarty R Chairunnisa Lamangantjo Citra Leonita Matalauni Cono, Titi Hawanda Metania Dali, Ira K. Dama, Dewi Rahayu Damopolii, Insar Danial Mohamad Devi Bunga Pagalla Devi Bunga Pagalla Dewi Wahyuni K. Baderan Djafar, Fitri Yani Djuna Lamondo Dwinanto, Arif Elawati, Elawati Elsi Gogou Elya Nusantari Fadlia Dunggio Fathur Rahman M. Ali Fatmariani Abdul Wahab Febriyanti Febriyanti febriyanti febriyanti Febriyanti Febriyanti Febriyanti Febriyanti Frida Maryati Yusuf GIAT SURYATMANA Gintulangi, Sabriana Oktaviana Gogou, Elsi Hamzah B Uno Hartono D. Mamu Hayatiningsih Gubali Husain, Holiyana Husain, Ilyas H. Ilyas Husain Indri Meliyani Bouta Indriati Husain Ishak, Rafli Isima , Lindawaty Iswanto Bakari Jan Hendriek Nunaki Jusna Ahmad Kadita P. Latif Keley, Umar Keley, Umar Labuga, Falerins ladoma, wafiq aziza m. Lamatenggo, Nina Lindawaty Isima Magfirahtul Jannah Margaretha Solang Marini Susanti Hamidun Masra Latjompoh Mega Rosalita Ekaputri Koni Miftahul F. Adudu Miftahul Fikriyah Adudu Muchtar Ahmad Muh. Nur Akbar Muhammad Isra Mukhlisulfatih Latief Mustamin Ibrahim Mustaqimah, Nur Mutmainah Mutmainah Nazifah R Adam Nazwa S. Lamante NENNY NURLAENY Nurdin Nuryanti Rumalolas Pagala, Devi Bunga Pakaya, Melisa Patta Sija Potutu, Bayu S. Putri, Tarissa Eka Rahman, Iyam Rahwilin Van Gobel Ramli Utina Rampi Yusuf Rianjani, Devi Tutut Rianjani, Devi Tutut Rinna Amelia Polihito Risna A. Onu Rizal Suleman Rizaldi Mokodompit ROBERT DJONGGI MARULI SIMANUNGKALIT Rosely, Meilin S. Y. Sahat Patar Lumban Gaol Saifullah Mamonto Suwarni Karim Syafar, Sitti Zaenab Tadidik, Ulfaida H. Timbola, Muh Kirad Ui, Maryam Walangadi, Farhana Rahmatia Widyawati S. Isima Wilinda A. Datau Wirnangsi Din Uno Wirnangsih D. Uno Yelsi Patiung Yuliana Nurdian Toini Yuliana Retnowati Yumna Binti Abud Alamri Yuniyarti Hulu Yusrin Anton Puluhulawa Yusriyah Yusriyah Zuliyanto Zakaria Zusriadi, Brenda Febrina