Abstract. Sibero MT, Pribadi R, Larasati SJH, Calabon MS, Sabdono A, Subagiyo S, Frederick EH. 2021. Diversity of sponge-associated fungi from a mangrove forest in Kemujan Island, Karimunjawa National Park, Indonesia. Biodiversitas 22: 5695-5605. Plenty of studies have reported interesting biological properties and bioactive compounds from sponge-associated fungi in Indonesia. However, only a few studies consider their biodiversity. Most of the studies collected the sponge from the coral reef ecosystem and barely reported from the mangrove ecosystem. This study aimed to discover the biodiversity of sponge-associated fungi from a mangrove ecosystem using a DNA barcoding approach. Five mangrove-associated sponges were collected from a tidal mangrove forest in Kemujan Island, Karimunjawa National Park, Indonesia. In total, we isolated 56 sponge-associated fungi, which consisted of seven genera in the phylum Ascomycota (77.78%), one genus in the phylum Basidiomycota (11.11%), and one genus in the phylum Mucoromycota (11.11%). Trichoderma (n: 15, 26.79%), Aspergillus (n: 13, 23.21%) and Fusarium (n: 12, 21.45%) were the top three dominant genera. In addition, based on the association of fungi to its sponge hosts, Aspergillus, Aureobasidium, Fusarium, and Trichoderma are sponge-generalists; Absidia and Pestalotiopsis are sponge-associates; while Lasiodiplodia, Montagnula, and Wallemia are sponge-specialist.
Spons merupakan organisme yang memiliki pori-pori dan termasuk kedalam filum Porifera. Hewan ini merupakan filter feeders dimana spons menyaring makanannya masuk kedalam rongga tubuhnya, sehingga spons dapan memakan partikel organik algae, dan mikroba, termasuk kapang. Kapang merupakan mikroorganisme eukariotik dari kingdom fungi, multiseluler, menghasilkan miselium tanpa pembentukan badan buah. Kapang dapat berfungsi sebagai penjaga keseimbangan ekosistem di perairan. Tujuan dari penelitian ini adalah mengidentifikasi dua isolat kapang yang telah diisolasi dari inang spons di ekosistem mangrove dengan menggunakan DNA barcoding. Metode dalam penelitian ini yaitu peremajaan isolat, karakterisasi morfologi yaitu warna koloni, tekstur, reverse, exudates, sclerotia, bentuk konidia, konidiofor, spora, dan septa. Identifikasi molekuler dari ekstraksi DNA, amplifikasi, elektroforesis, visualisasi DNA, sekuens dan BLAST. Optimasi suhu annealing dilakukan pada amplifikasi DNA. Berdasarkan identifikasi molekuler dengan menggunakan primer universal ITS1 5' TCCGTAGGTGAACCTGCGG 3' dan ITS4 5' TCCTCCGCTTATTGATATGC 3' dan persamaan homologi, isolat MKMS 2.1 merupakan Trichoderma reesei (100%) dan PKMS 2.2 merupakan spesies Fusarium solani (99,81%). A sponge is an organism that has pores and belongs to the Porifera phylum. These animals are filter feeders where the sponge filters its food into the body cavity, so the sponge can eat organic algae particles, and microbes, including fungi. Mold is a eukaryotic microorganism from Fungi kingdom, multicellular, that forms mycelium without fruiting body formation. Mold has an important role in balancing the environmental quality in an ecosystem. The purpose of this study was to identify two molds that had been isolated from sponge in the mangrove ecosystem using DNA barcoding. The study was conducted in April-October 2019 in Laboratory of Tropical Marine Biotechnology using the experimental laboratory method. The methods in this research were isolation refreshment, morphological characterization which were consisted of colony color, texture, reverse, exudates, sclerotia, conidia, conidiophores, spores, and septa. Molecular identification consisted of DNA extraction, amplification, electrophoresis, DNA visualization, sequences and BLAST. Annealing temperature optimization is carried out on DNA amplification. Based on molecular identification using universal primers ITS1 5 'TCCGTAGGTGAACCTGCGG 3' and ITS4 5 'TCCTCCGCTTATTGATATGC 3' and homological equations, MKMS 2.1 isolates were identified as Trichoderma reesei (100%) and PKMS 2.2 were identified as Fusarium solani (99.81%).
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