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Astaxanthin-Producing Microalgae Identification Using 18S rRNA: Isolates from Bangkalan Mangrove Waters and Sowan Tuban Northern Waters, East Java, Indonesia

Journal of Tropical Biodiversity and Biotechnology · Vol. 6 No. 3 (2021)

DOI
10.22146/jtbb.64882
ISSN
2540-9581, 2540-9573
Terbit
2021-10-04
Penerbit
Universitas Gadjah Mada
Bahasa
eng
Lisensi
creativecommons.org/licenses/by-sa/4.0

Abstrak

Microalgae are a group of micro-sized photosynthetic organisms that range from prokaryotic cyanobacteria to eukaryotic algae. Microalgae are widely used as a source of natural food, cosmetic ingredients, food ingredients, and a source of pigments. This study aims to identify species of four microalgae isolates named B1, B2, B3, and S2 from Bangkalan Mangrove Waters and Sowan Tuban Northern Waters, and to determine their astaxanthin pigment concentration under 1 M NaCl. Species identification was carried out through a molecular approach by utilization of an 18S rRNA gene marker. A quantitative test of astaxanthin concentration was carried out by spectrophotometric analysis. Molecular identification results show that isolates B1 and B3 are closely related to Chlorella sp., while isolates B2 and S2 are closely related to Picochlorum maculatum. Moreover, under salinity stress condition of 1 M NaCl shown a significant decrement of astaxanthin production compared to the control treatment. At 1 M NaCl, the astaxanthin content of isolate B1 was 4x10-5 mgL-1, isolate B2 was 2x10-5 mgL-1, isolate B3 was 1x10-5 mgL-1, and isolate S2 was 6x10-6 mgL-1. All in all, isolate S2 has the highest astaxanthin among the other isolates at normal conditions, while under salt stress regime, isolate B1 shown to be the best source for astaxanthin.

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Sumber metadata: OAI-PMH (metadata jurnal) https://jurnal.ugm.ac.id/jtbb/oai, pertama di-harvest 9 Nov 2026, terakhir terlihat 9 Nov 2026.
Metadata asli (oai_dc) 
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	<dc:title xml:lang="en-US">Astaxanthin-Producing Microalgae Identification Using 18S rRNA : Isolates from Bangkalan Mangrove Waters and Sowan Tuban Northern Waters, East Java, Indonesia</dc:title>
	<dc:creator>Ermavitalini, Dini</dc:creator>
	<dc:creator>Rukhmana, Siska Yulia</dc:creator>
	<dc:creator>Meidina, Thalita</dc:creator>
	<dc:creator>Baskoro, Leonardo Pascalis Dimas Cahyo</dc:creator>
	<dc:creator>Saputro, Triono Bagus</dc:creator>
	<dc:creator>Ni’matuzahroh, Ni’matuzahroh</dc:creator>
	<dc:creator>Purnobasuki, Hery</dc:creator>
	<dc:subject xml:lang="en-US">Biology</dc:subject>
	<dc:subject xml:lang="en-US">Astaxanthin, Bangkalan Mangrove Waters, Chlorella sp., Picochlorum maculatum Sowan Tuban Northern Waters</dc:subject>
	<dc:description xml:lang="en-US">Microalgae are a group of micro-sized photosynthetic organisms that range from prokaryotic cyanobacteria to eukaryotic algae. Microalgae are widely used as a source  of natural food, cosmetic ingredients, food ingredients, and a source of pigments. This study aims to identify species of four microalgae isolates named B1, B2, B3, and S2 from Bangkalan Mangrove Waters and Sowan Tuban Northern Waters, and to determine their astaxanthin pigment concentration under 1 M NaCl. Species identification was carried out through a molecular approach by utilization of an 18S rRNA gene marker. A quantitative test of astaxanthin concentration was carried out by spectrophotometric analysis. Molecular identification results show that isolates B1 and B3 are closely related to Chlorella sp., while isolates B2 and S2  are closely related to Picochlorum maculatum. Moreover, under salinity stress condition of 1 M NaCl shown a significant decrement of astaxanthin production compared to the control treatment. At 1 M NaCl, the astaxanthin content of isolate B1 was 4x10-5 mgL-1, isolate B2 was 2x10-5 mgL-1, isolate B3 was 1x10-5 mgL-1, and isolate S2 was 6x10-6 mgL-1. All in all, isolate S2 has the highest astaxanthin among the other isolates at normal conditions, while under salt stress regime, isolate B1 shown to be the best source for astaxanthin. </dc:description>
	<dc:publisher xml:lang="en-US">Universitas Gadjah Mada</dc:publisher>
	<dc:contributor xml:lang="en-US">Ministry of Research Technology and Higher Education of the Republic of Indonesia</dc:contributor>
	<dc:date>2021-10-04</dc:date>
	<dc:type>info:eu-repo/semantics/article</dc:type>
	<dc:type>info:eu-repo/semantics/publishedVersion</dc:type>
	<dc:type xml:lang="en-US"></dc:type>
	<dc:format>application/pdf</dc:format>
	<dc:identifier>https://journal.ugm.ac.id/jtbb/article/view/64882</dc:identifier>
	<dc:identifier>10.22146/jtbb.64882</dc:identifier>
	<dc:source xml:lang="en-US">Journal of Tropical Biodiversity and Biotechnology; Vol 6, No 3 (2021): December; jtbb64882</dc:source>
	<dc:source>2540-9581</dc:source>
	<dc:source>2540-9573</dc:source>
	<dc:language>eng</dc:language>
	<dc:relation>https://journal.ugm.ac.id/jtbb/article/view/64882/32138</dc:relation>
	<dc:relation>https://journal.ugm.ac.id/jtbb/article/downloadSuppFile/64882/16013</dc:relation>
	<dc:relation>https://journal.ugm.ac.id/jtbb/article/downloadSuppFile/64882/16014</dc:relation>
	<dc:coverage xml:lang="en-US">East Java, Indonesia</dc:coverage>
	<dc:coverage xml:lang="en-US"></dc:coverage>
	<dc:coverage xml:lang="en-US"></dc:coverage>
	<dc:rights xml:lang="en-US">Copyright (c) 2021 Journal of Tropical Biodiversity and Biotechnology</dc:rights>
	<dc:rights xml:lang="en-US">http://creativecommons.org/licenses/by-sa/4.0</dc:rights>
</oai_dc:dc>