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All Journal HAYATI Journal of Biosciences Biology, Medicine, & Natural Product Chemistry Journal of Tropical Biodiversity and Biotechnology Science and Technology Indonesia Biosaintifika: Journal of Biology & Biology Education
Nurhayat, Oktan Dwi
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Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Earth & Planetary Sciences Environmental Science Immunology & microbiology Materials Science & Nanotechnology Medicine & Pharmacology Physics Public Health

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Biodecolorization of Anthraquinone and Azo Dyes by Newly Isolated Indonesian White-Rot Fungi Ramadhan, Kharisma Panji; Anita, Sita Heris; Oktaviani, Maulida; Sari, Fahriya Puspita; Budi Laksana, Raden Permana; Nurhayat, Oktan Dwi; Yuli Yanto, Dede Heri
Biosaintifika: Journal of Biology & Biology Education Vol 13, No 1 (2021): April 2021
Publisher : Department of Biology, Faculty of Mathematics and Sciences, Semarang State University . Ro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/biosaintifika.v13i1.26148

Abstract

Water pollution by dyes represents from dyestuff industry becomes an environmental concern. Finding new isolates capable of decolorizing these dyes is important. The study aimed to assess the new isolates of white-rot fungi (WRF) as decolorizing agent of anthraquinone and azo dyes. Decolorization assay were conducted in Agar plates and liquid medium. During the decolorization, laccase activities produced by the fungal strains were analyzed. Identification of the fungal strains were investigated using molecular DNA analysis. The results showed that isolates M3, H18, and GP1 were able to decolorize anthraquinone and azo dyes in Agar and liquid medium. Based on DNA analysis, isolates M3, H18, and GP1 have the similarity to Trametes sanguinea, Trametes polyzona, and Neofomitella guangxiensis, respectively. Among the fungi, T. polyzona H18 exhibited high decolorization ability (70–90%) to the dyes (100 mg/L) after 96-hours incubation. Laccase activity was fluctuated during the reactions with tendency to increase at the beginning until its peak, then decreased at the end of incubation. This study demonstrated the potential of the new isolates from Indonesia to decolorize anthraquinone and azo dyes. The results of the study can provide an alteranative for bioremediation agents of contaminated water by synthetic dyes.
First Report on Wild Occurrences of Phoenix Mushroom (Pleurotus pulmonarius Fr. Quél.) in Indonesia Putra, Ivan Permana; Nurhayat, Oktan Dwi; Sibero, Mada Triandala; Hermawan, Rudy
Journal of Tropical Biodiversity and Biotechnology Vol 9, No 1 (2024): March
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/jtbb.86455

Abstract

The genus Pleurotus is known as a commercially important mushroom and one of the most well-known cultivated mushrooms worldwide. Of many species of Pleurotus, the phoenix mushroom (P. pulmonarius) is cultivated in many countries, including Indonesia. In Indonesia, the farmers and larger companies usually use commercial strains of phoenix mushroom which they purchased from other countries. To date, there was no prior information regarding wild occurrences of P. pulmonarius in Indonesia. During our regular mushroom hunting in Sukabumi, West Java, Indonesia, some edible wild fruiting bodies of light brown Pleurotus were collected. The current study aimed to determine the taxonomical position of our specimens based on morphological and molecular evidence. The combination of morphological and molecular analysis confirmed our specimens as P. pulnonarius. Morphologically, our specimens were distinguished by the small to medium sized fruiting bodies, pileus light brown, pinkish brown, to pale brown, flabelliform in the beginning to expanding broadly ovoid in maturity, lamellae shortly to deeply decurrent, stipe fleshy, eccentric to lateral, concolorous with lamellae, Basidiospores cylindrical to ellipsoid, basidia clavate to club shaped, basidioles are abundant, oleiferous hyphae common. The BLAST result revealed that our specimens posed a high similarity to P. pulnonarius from several countries as the top hits. The ITS phylogenetic tree placed Pleurotus FIPIA-DEP51 in the same clade of P. pulnonarius with 100% BS value. This study reports for the first time the wild occurences of P. pulmonarius in Indonesia. Future study should be done to characterize the cultures of reported mushroom which can potentially be the local strain for cultivation of P. pulmonarius industry in Indonesia. 
The Unpopular Edible Bolete (Phlebopus portentosus) in Indonesia Putra, Ivan Permana; Nurhayat, Oktan Dwi; Sibero, Mada Triandala; Hermawan, Rudy; Kristanto, Michael Aditya
HAYATI Journal of Biosciences Vol. 31 No. 4 (2024): July 2024
Publisher : Bogor Agricultural University, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.4308/hjb.31.4.663-670

Abstract

Phlebopus portentosus (Berk. and Broome) Boedijn was firstly constructed from the collection of Indonesia in 1951. To date, the subsequent collection of this ectomycorrhizal (ECM) fungi has not been done in Indonesia. In addition, the utilization information of this edible mushroom as food is not popular for the country. The goal of our work was to update the current collection, provide the morphological and molecular data, and promote the utilization of this edible mushroom in Indonesia. Fresh fruiting bodies were evaluated for morphological and molecular evidence. The basidiomata were analysis on the basis of the morphological and molecular evidence. The phylogenetic tree was constructed following the rDNA-ITS 1/2 sequence. P. portentosus was verified by morphological and phylogenetic studies combined. The indigenous people in the research site use this wild edible mushroom for self-consumption and sell it to local market. Phlebopus portentosus BO24626 was solitary to connate, boletoid basidioma, yellowish to greenish brown pileus and stipe, yellowish hymenophore, clavate stipe, club shaped basidia, oval to subglobose basidiospores, cystidia present. The absence of sponge-like tissues and the occurrence of sterigmata distinguished our specimens from the similar morphological species P. spongious. The lack of reddish stipe distinguished our specimen from P. roseus. In addition, the presence of hymenial cystidia delimits our specimens from P. colossus. The inferred phylogenetic tree nested our specimen in the group of P. portentosus (sister to P. spongiosus). The ITS sequence of our specimen is now deposited at GenBank and can be applied to upcoming research of P. portentosus.
The Recent Collection of Climacodon roseomaculatus (Hydnum roseomaculatum Henn. & E. Nyman) from The Type Locality (Indonesia) Putra, Ivan Permana; Nurhayat, Oktan Dwi
Biology, Medicine, & Natural Product Chemistry Vol 13, No 2 (2024)
Publisher : Sunan Kalijaga State Islamic University & Society for Indonesian Biodiversity

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14421/biomedich.2024.132.585-589

Abstract

Climacodon roseomaculatus is a fleshy species of Polyporales with a hydnoid hymenophore. The species’s distribution in Indonesia was reported six times from 1923 to 1961 from West Java and East Java collection to date, there have been no following updates on the collection and occurrence status of C. roseomaculatus in Indonesia. During a fungus foray in 2023, some red to pink basidiomata of Climacodon were spotted in Semarang, Central Java, Indonesia. The current study aimed to determine the taxonomical position of Climacodon BO24632 based on morphological evidence. Fresh materials were used for the investigation of macro- and micromorphological characters. The result showed that Climacodon BO24632 was identified as C. roseomaculatus based on distinctive features of stipe and gleocystidia. Climacodon roseomaculatus BO24632 is closely related to C. sanguineus with blood-red to pink basidiomata, cylindrical spines of hymenophores, and ellipsoid basidiospores. However, the former species lacks a well-developed stipe and has thin to thick-walled gloeocystidia. This study is the first report on the distribution of C. roseomaculatus from Central Java, Indonesia. In addition, the current work is the latest information and herbarium collection of C. roseomaculatus after more than fifty years of hiatus in Indonesia. We expect that the same species also occur in many different locations in Indonesia; thus need a warrant of collections.
Scrutinize the Taxonomical Identity of Green Edible Russula from Sulawesi (Indonesia) Nurhayat, Oktan Dwi; Putra, Ivan Permana; Riffiani, Rini; Taridala, Sitti Aida Adha; Arif, Zulhan
HAYATI Journal of Biosciences Vol. 32 No. 2 (2025): March 2025
Publisher : Bogor Agricultural University, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.4308/hjb.32.2.436-444

Abstract

Russula Pers. (Basidiomycota) is recognized as one of the most widely distributed macrofungi globally. This genus includes several edible species with distinct color variations, such as R. cyanoxantha. However, in Indonesia, knowledge of this species remains limited as colourful mushrooms are often mistakenly considered poisonous. During a fungus expedition in Southeast Sulawesi, we collected a green edible wild mushroom consumed by locals. Our study aimed to verify the taxonomic classification of our specimens through morphological and molecular analysis. The fresh basidiomata were examined based on their macroscopic and microscopic characteristics. Molecular analysis using ITS 1/2 sequences was conducted to construct a phylogenetic tree. Our findings identified the green mushroom as R. cyanoxantha (Schaeff.) Fr. (Synonym: R. lilacina). Morphologically, our specimens can be distinguished from R. virescens by their smooth cap. They differ from R. aeruginea and R. heterophylla by having flexible, persistent gills. Additionally, our R. cyanoxantha specimen BO24636 can be separated from R. dinghuensis and R. subpallidirosea by their forked gills near the stalk. A BLAST comparison revealed a 96% similarity to R. lilacina from Thailand as the closest match. The phylogenetic tree (Maximum Likelihood) placed our specimens within the R. lilacina group (BS value 99%). Our research contributes to the taxonomic understanding of this edible wild green macrofungi in Indonesia, and future studies should explore its nutritional composition.
Decolorization of Synthetic Dyes by Laccase of Phellinus noxius BRB 11 Immobilized with Halloysite Nanotubes Naser, Inda Hastuti N; Kemala, Tetty; Yanto, Dede Heri Yuli; Purwaningsih, Henny; Nurhayat, Oktan Dwi; Ardiati, Fenny Clara; Bakar, N.H.H Abu; Iqbal, Anwar
Science and Technology Indonesia Vol. 10 No. 2 (2025): April
Publisher : Research Center of Inorganic Materials and Coordination Complexes, FMIPA Universitas Sriwijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26554/sti.2025.10.2.644-659

Abstract

Halloysite nanotubes (HNTs) have been proposed as promising supports for enzyme immobilization. Developing an effective technique for enzyme immobilization on HNTs is crucial for their practical application. In this study, we present a method for immobilizing laccase enzymes on HNTs using various amino acids as green cross-linkers for eco-friendly decolorization of synthetic dye. The modified HNTs were characterized using FT-IR, FE-SEM, and HR-TEM analyses. Furthermore, the effects of various parameters—including pH (ranging from 3 to 8), temperature (30-70°C), toxicity, and reusability—on the activity of both free and immobilized laccase were investigated. The results indicated that glycine (Gly) provided the most effective support for laccase immobilization on HNTs. The modified HNTs/Gly-Lac achieved an immobilization yield of 98.45% and successfully decolorized 94.60% of Acid Blue 129 (AB129) within 2 h. The successful immobilization of laccase onto functionalized HNTs was confirmed through FT-IR, FE-SEM, and HR-TEM analyses. Morphological observations of HNTs/Gly for laccase immobilization showed a thickened and roughened appearance with a thin, light gray layer on the outer surface. Additionally, the presence of an imine (-C=N-) bond peak and a peak at 1410 cm-1, corresponding to the (-NH) bond, suggested successful covalent immobilization. The toxicity analysis revealed a reduction in the toxicity of laccase after immobilization onto modified HNTs. A reusability assessment conducted over five cycles demonstrated that decolorization efficiency remained above 45%. These findings suggest that HNTs/GlyLac could serve as an effective material for textile dye wastewater treatment.
Taxonomic Study and Bioprospecting Indonesian Termitomyces eurrhizus Ayu, Siti Maulyda; Mahardhika, Wahyu Aji; Putra, Ivan Permana; Nurhayat, Oktan Dwi
Biology, Medicine, & Natural Product Chemistry Vol 14, No 1 (2025)
Publisher : Sunan Kalijaga State Islamic University & Society for Indonesian Biodiversity

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14421/biomedich.2025.141.289-297

Abstract

Termitomyces are known as wild edible mushrooms that are commonly consumed in Africa and Asia. T. eurrhizus can be easily found in many areas in Indonesia. However, the recent collection and proper documentation of this species has not been done in Indonesia. In addition, the potential utilization of this species needs to be revealed. This research aims to identify, investigate the proximate value, and test the antibacterial activity of T. eurrhizus. The exploration was carried out at the IPB University campus forest using an opportunistic sampling method. Fresh basidiomata were used for morphological identification. Proximate analysis was done following AOAC method. Mushroom extract was subjected to antibacterial test against Enteropathogenic Escherichia coli. Our specimen was identified as T. eurrhizus based on pileus characters (macroscopically) and spore features under an electron microscope (microscopically). The proximate result showed that the moisture content was 13,70 %, the ash 13,66 %, total fat content 2,05 %, total protein content 27,73 % and fiber content 8,49 %. The investigated antibacterial was evaluated based on size of antibacterial zone for concentration 200 mg/ml extract (3,5 mm), 100 mg/ml (6,5 mm), 50 mg/ml (3,83 mm), 25 mg/ml (2,5 mm), and 12.5 mg/ml 6,33 mm. Our result showed the potential utilization of T. eurrhizus as nutraceutical food and antibacterial. Further research is expected to collaborate with various cultivation or product development fields.
Co-Authors Ardiati, Fenny Clara Ayu, Siti Maulyda Bakar, N.H.H Abu Budi Laksana, Raden Permana Dede Heri Yuli YANTO Fahriya Puspita Sari Henny Purwaningsih Iqbal, Anwar Ivan Permana Putra Kristanto, Michael Aditya Mahardhika, Wahyu Aji Naser, Inda Hastuti N Oktaviani, Maulida Ramadhan, Kharisma Panji Rini Riffiani Rudy Hermawan Sibero, Mada Triandala Sita Heris Anita Taridala, Sitti Aida Adha Tetty Kemala