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Benatar, Gilang Vaza
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Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Immunology & microbiology

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The Viability of Indigenous Rhizosphere Fungi of Kirinyuh (Chromolaena odorata) as a Biofungicide for Controlling Anthracnose in Red Chili (Capsicum annuum L.) Aji, Aji; Sidiq, Roni Maulana; Agustin, Gina Sonia; Sari, Serly Marsita; Hamdayani, Annisa; Benatar, Gilang Vaza
Jurnal Biologi Tropis Vol. 25 No. 2 (2025): April-Juni
Publisher : Biology Education Study Program, Faculty of Teacher Training and Education, University of Mataram, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jbt.v25i2.8576

Abstract

Anthracnose disease caused by Colletotrichum spp. has reduced red chili production in Indonesia, thus requiring control measures that can suppress anthracnose in a more environmentally friendly manner. This research aims to explore the potential of rhizosphere fungi from kirinyuh as a biological agent in controlling anthracnose disease in red chili peppers. (Capsicum annuum L.). Isolates found in the rhizosphere of kirinyuh were identified and then tested for hypersensitivity, in vitro, and in vivo. Eleven rhizosphere fungal isolates from kirinyuh were suspected to belong to the genera Penicillium, Blastomyces, Sepedonium, Aspergillus, Tricladium, and Rhizoctonia, and did not show pathogenicity traits on plants based on hypersensitivity tests. The results of in vitro tests show that the isolate with code CRKF can suppress the growth of Colletotrichum by up to 46%. Meanwhile, in in vivo tests, the CRKA isolate (Penicillium) was able to reduce the intensity of attacks by 13%, the CRKH isolate effectively reduced fruit shrinkage, and the CRKI isolate was proven to slow down the incubation period by up to 4 HSI.
Binding Affinity of Potato, Cassava, and Purple Yam Phytochemicals to Fusarium Proteins: Insights from Molecular Docking Benatar, Gilang Vaza; Hakim, Abdul; Anisah, Siti Nur; Sidiq, Roni Maulan; Tarigan, Rafif Naufal Assadel
Jurnal Biologi Tropis Vol. 25 No. 4 (2025): in Progress
Publisher : Biology Education Study Program, Faculty of Teacher Training and Education, University of Mataram, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jbt.v25i4.10096

Abstract

Fusarium species are destructive plant pathogens responsible for severe crop losses thereby posing a critical threat to global food security. Sustainable strategies to control Fusarium-induced diseases are urgently needed due to limitations of synthetic fungicides. This study investigated the interaction of phytochemicals from potato (Solanum tuberosum), cassava (Manihot esculenta), and purple yam (Dioscorea alata) with three Fusarium proteins: LaeA, Pep2, and VeA. Protein structures were modeled and validated using stereochemical analyses, followed by molecular docking with representative metabolites, including pyrogallol, cyclogallipharaol, scopoletin, linamarin, cyanidin-3-glucoside, and peonidin-3-glucoside. Docking results showed that potato metabolites exhibited moderate binding activity, cassava metabolites displayed broader inhibitory potential, and purple yam anthocyanins demonstrated the strongest affinities (–6.7 to –7.4 kcal/mol) through multiple hydrogen bonds, hydrophobic contacts, and electrostatic interactions. Among the targets, Pep2 showed consistently stable interactions, while LaeA and VeA exhibited greater flexibility but remained responsive to anthocyanins. These findings highlight the potential of edible crop-derived phytochemicals, particularly anthocyanins and scopoletin, as eco-friendly antifungal agents. The structural basis provided here supports future experimental validation and the development of sustainable crop protection strategies.
Molecular Mechanism of Trichoderma harzianum Secondary Metabolites in Inhibiting Cellulase Protein of Colletotrichum capsici Benatar, Gilang Vaza; Nurhayati, Yeyet; Ridwan, Nur Fathurahman; Aisyah, Aisyah
Jurnal Biologi Tropis Vol. 25 No. 1 (2025): Januari - Maret
Publisher : Biology Education Study Program, Faculty of Teacher Training and Education, University of Mataram, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jbt.v25i1.8475

Abstract

Fungal diseases in agriculture pose significant challenges to food security, necessitating sustainable biocontrol solutions. Trichoderma harzianum, a biocontrol agent, exhibits potent antifungal properties through its secondary metabolites. This study investigates the inhibitory mechanism of T. harzianum metabolites on the cellulase protein of Colletotrichum capsici, the causative agent of chili anthracnose, using molecular docking and dynamics simulations. The cellulase protein, crucial for plant cell wall degradation, was modeled through homology techniques, and its interactions with T, harzianum metabolites—cyanuric chloride, palmitinic acid, and massoia lactone—were analyzed. Massoia lactone demonstrated the highest inhibitory potential, with stable binding interactions confirmed through molecular dynamics. These findings provide insights into developing environmentally sustainable antifungal strategies. Further research is recommended to optimize the application of T. harzianum metabolites as biopesticides.
Co-Authors Abdul Hakim Agustin, Gina Sonia Aisyah Aisyah Aji, Aji Anisah, Siti Nur Hamdayani, Annisa Nurhayati, Yeyet Ridwan, Nur Fathurahman Sari, Serly Marsita Sidiq, Roni Maulan Sidiq, Roni Maulana Tarigan, Rafif Naufal Assadel