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All Journal ILMU KELAUTAN: Indonesian Journal of Marine Sciences
Agus Trianto
Department of Marine Science, Faculty of Fisheries and Marine Science, Universitas Diponegoro Marine Natural Product Laboratory, Centre for Research and Services, Universitas Diponegoro
Earth & Planetary Sciences

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Molecular Identification and Biotechnological Potential of Cerithidea cingulata-and Lottia scabra Associated Fungi as Extracellular Enzyme Producer and Anti-Vibriosis Agent Agus Trianto; Ocky Karna Radjasa; Subagiyo Subagiyo; Armeilia Ardiva Isabella; Muhammad Syaifudien Bahry; Hartuti Purnaweni; Rignolda Djamaludin; Aiyen Tjoa; Ian Singleton; Darren Mark Evans; Karen Diele
ILMU KELAUTAN: Indonesian Journal of Marine Sciences Vol 28, No 2 (2023): Ilmu Kelautan
Publisher : Marine Science Department Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/ik.ijms.28.2.136-147

Abstract

Mangroves are complex, unique, and dynamic ecosystems that host organisms that have special physiological adaptations to fluctuations in salinity, temperature, and pH. Gastropods have an important role in the mangrove ecosystem for food cycles and webs by helping to provide nutrients and micro-habitats for microbes.  Micro-fungi isolated from mangrove ecosystems are productive sources of enzymes and bioactive compounds such as antibacterial and antifungal. In this study a explored the enzymatic and anti-vibrio activity of fungi associated with the marine gastropod Cerithidea cingulata and Lottia scabra. collected in three mangrove forests in North Sulawesi, Indonesia.  The fungi associated with the specimens were inoculated on malt extract agar (MEA) using the tapping method. Enzymatic and anti-vibrio assays were conducted applying the plug method. Positive effects of the fungal compounds on Vibrio  were indicated by  clear zones formed around the isolates.  A total of 13 fungal species were isolated from C. cingulata (19MB-C5  and 19MBa-A4) and L. scabra (19MT-07 and 19MT-18).  Most fungal isolates have moderate growth rate. The isolate with highest cellulolytic, proteolytic, and anti-vibriosis activity (Vibrio parahaemolyticus, V. harveyi, V. vulnificus, and V. alginolyticus), derived from C. cingulata 19MB-C5 was closely related to Aspergillus niger, as revealed by molecular analysis using the universal primers ITS1 and ITS4 (similarity value 99%).  A. niger 19MB-C5-3 has potential as a bioremediation and anti-vibrio agent that can be applied in aquaculture.
Potential of Marine Sponge-Associated Fungi (Callyspongia sp.) as Textile Dye Biodegradation Agents Erlita Dwi Octaviani; Agus Trianto; Ocky Karna Radjasa; Bambang Yulianto; Agus Sabdono; Erin M. Cauley
ILMU KELAUTAN: Indonesian Journal of Marine Sciences Vol 30, No 4 (2025): Ilmu Kelautan
Publisher : Marine Science Department Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/ik.ijms.30.4.597-612

Abstract

Textile industries generate large volumes of wastewater containing synthetic dyes such as azo, naphthol, and rhodamine B, which are highly resistant to degradation and pose significant environmental risks when discharged into aquatic ecosystems. These dyes can be toxic to aquatic life, disrupt food chains, and cause long-term pollution. This study aimed to evaluate the biodegradation potential of marine fungi isolated from the sponge Callyspongia sp. as a natural and eco-friendly solution for textile dye removal. Two fungal isolates, RA.S12.1 and RA.S12.2, were tested on solid and liquid media with 200 ppm dye concentrations. Isolation involved collecting sponges from marine environments and culturing them on selective media to obtain fungal colonies. Decolorization was assessed through qualitative observations (changes in growth zone color) and quantitative analyses using UV-Vis spectrophotometry to measure absorbance reductions at specific wavelengths, as well as CMYK color measurements to quantify objective color intensity changes. Results indicated that isolate RA.S12.2 achieved the highest decolorization percentage of 64.8% for Azo Mordant Black 17 after 7 days of incubation, while RA.S12.1 reached only 30.1%. Molecular identification via ITS rDNA gene sequencing confirmed both isolates as Penicillium citrinum with 100% homology. These findings suggest that marine-derived P. citrinum holds strong potential as a bioremediation agent for textile dye degradation, offering an environmentally friendly alternative for wastewater treatment in coastal and marine areas impacted by industrial pollution. This approach could provide a sustainable alternative to conventional chemical methods, with broader applications in mitigating global aquatic pollution. Further research is needed to optimize conditions and test at an industrial scale.
Co-Authors Agus Sabdono Aiyen Tjoa Armeilia Ardiva Isabella Bambang Yulianto Darren Mark Evans Erin M. Cauley Erlita Dwi Octaviani Hartuti Purnaweni Ian Singleton Karen Diele Muhammad Syaifudien Bahry Ocky Karna Radjasa Ocky Karna Radjasa Rignolda Djamaludin Subagiyo Subagiyo