Species of Ulva (Ulvophyceae, Chlorophyta) as indicators of salinity

Rybak, Andrzej

doi:10.1016/j.ecolind.2017.10.061

Cited by 49 publications

(36 citation statements)

References 65 publications

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“…Worldwide, U . compressa occurring in brackish environments or in the upper intertidal zone may have adapted to low salinity and high desiccation [7, 12, 55–57]. As shown in previous studies, this species is found in only two sites with an extensive intertidal zone in this study.…”

Section: Discussionsupporting

confidence: 68%

Species composition, diversity, and distribution of the genus Ulva along the coast of Jeju Island, Korea based on molecular phylogenetic analysis

et al. 2019

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Species diversity in the genus Ulva remains understudied worldwide. Using molecular analyses we investigated the species composition, diversity, distribution, and relative frequencies of the genus Ulva along the entire coast of Jeju Island, off the southern tip of Korea. Species identification was performed for 215 samples collected from 23 sites, based on comprehensive phylogenetic and model-based species delimitation analyses using the sequences of two molecular markers, chloroplast elongation factor Tu ( tuf A) and nuclear rDNA internal transcribed spacer (ITS). We identified 193 specimens as nine Ulva species, 14 specimens as Blidingia spp., and eight samples undetermined, based on the combined analysis of tuf A and ITS phylogenies. Two model-based approaches generally supported nine groups of Ulva species. Previously documented species complex, such as U . ohnoi−U . spinulosa and U . procera−U . linza showed discordant relationships between the two phylogenies. The occurrence of U . torta on Jeju Island was first observed, despite its existence on the mainland previously reported. Ulva australis [16 of 23 sites; 34.4% (relative frequency)], U . ohnoi (16; 21.9%), and U . procera (11; 14%) were found to be the predominant species. Our study highlights that molecular analysis is critical for species delimitation in the genus Ulva and provides fundamental information for an understanding of green-tide assemblages on the “biological hotspot” coastal ecosystem, Jeju Island in Korea. This study will also help to monitor and manage local green tides at the areas that are currently encountering rapid climate changes.

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Section: Discussionsupporting

confidence: 68%

Species composition, diversity, and distribution of the genus Ulva along the coast of Jeju Island, Korea based on molecular phylogenetic analysis

et al. 2019

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“…Results from One-way ANOVA and Tukey's multiple comparisons showed that BPA removal efficiency by U. prolifera had no significantly differences (p N 0.05) among salinity variations. As an intertidal species, U. prolifera possessed a wide salinity tolerance (Rybak, 2018). Therefore, salinity variation had no effect on the removal of BPA.…”

Section: Effect Of the Photoperiod And Salinity On Bpa Removalmentioning

confidence: 99%

Phycoremediation of coastal waters contaminated with bisphenol A by green tidal algae Ulva prolifera

Zhang

Lü

et al. 2019

Science of The Total Environment

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New phycoremediation of coastal water with BPA occurred during green tide bloom. • N94% of BPA was removed by the greentidal algae U. prolifera. • BPA removal efficiency has positive relationship with light, nutrient and temperature. • High removal efficiency (N94%) was achieved at environmental relevant concentrations. • BPA concentration in green tide bloom area was much lower than that in adjacent area.

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“…Ulva lactuca termasuk rumput laut hijau yang umum terdapat di pesisir pantai. U. lactuca diketahui memiliki habitat di perairan laut, pantai, dan karang (Rybak, 2018). Bentuk biota ini menyerupai tumbuhan tingkat tinggi, berwarna hijau, dengan helaian daun yang tepinya memiliki bentuk gelombang.…”

Section: Pendahuluanunclassified

Optimasi Hidrolisis Mikrobiologi serta Bioaktivitas Antibakteri, Antioksidan, dan Antikoagulan Hidrolisat Ulva lactuca

Putri

Hardjito

Santoso

2020

JPBKP

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Ulvan dalam hidrolisat Ulva lactuca merupakan senyawa bioaktif yang potensial di bidang biofarmakologi. Proses hidrolisis untuk memperoleh golongan senyawa ini dapat dilakukan secara kimiawi atau mikrobiologi. Proses mikrobiologi merupakan teknik yang potensial karena lebih mudah dan berbiaya rendah dibanding metode kimiawi. Namun, penelitian yang menggunakan teknik hidrolisis mikrobiologi masih sangat terbatas, terutama terhadap U. lactuca. Oleh karena itu, optimasi diperlukan agar mendapatkan teknik dengan hasil rendemen hidrolisat yang maksimal. Penelitian ini bertujuan untuk melakukan optimasi proses hidrolisis secara mikrobiologi dan menelaah aktivitas biologis ekstrak hidrolisatnya. Proses hidrolisis mikrobiologi dilakukan dengan teknik padat dan cair menggunakan kapang endofit dari tanaman Enhalus dan isolat bakteri laut dari rumput laut Eucheuma cottonii. Teknik mikrobiologis ini juga dibandingkan dengan teknik kimiawi (HCl). Optimasi dilakukan terhadap variabel durasi waktu (3, 6, 9, dan 12 hari) hidrolisis. Hasil penelitian menunjukkan bahwa rendemen metode hidrolisis cair menggunakan bantuan kapang endofit dari tanaman Enhalus (51,67%) dan isolat bakteri laut dari rumput laut E. cottonii (52,67%), lebih tinggi dan berbeda secara signifikan (p<0,05) dibandingkan teknik kimiawi (37,02%). Waktu hidrolisis terbaik yang ditemukan adalah selama tiga hari. Sementara itu, karakterisasi bioaktivitas menunjukkan bahwa hidrolisat U. lactuca memiliki potensi sebagai bahan aktif antikoagulan, tanpa adanya aktivitas sebagai antioksidan (IC50>200 ppm) maupun antibakteri (menghambat 36% Staphylococcus aureus dan Pseudomonas aeroginosa).ABSTRACTThe Ulvan in Ulva lactuca hydrolysate is a potential bioactive compound in the biopharmacology field. The hydrolysis process to obtain this class of compounds can be done in various ways, both chemically and microbiologically. The microbiological process is a potential technique because it is easier and cheaper than the chemical method. However, studies conducted with the microbiology hydrolysis technique are still very limited, especially for U. lactuca. Thus, optimation is needed to reveal an appropriate technique that produces the maximum yield. This study aimed to optimize the microbiological hydrolysis process and identify the biological activity of the hydrolyzed extract. The microbiological hydrolysis process was performed by solid and liquid techniques using microbial endophytic fungi from Enhalus plants and marine bacteria isolated from Eucheuma cottonii. The microbiology technique was compared with chemical techniques (HCl). Optimization was also carried out on the variable of hydrolysis duration (3, 6, 9, and 12 days). The results showed that yield of liquid hydrolysis method using the microbial endophytic fungi from Enhalus plants (51.67%) and marine bacteria isolated from E. cottonii (52.67%), were higher and significantly different (p<0.05) than that of chemical techniques (37.02%). Moreover, the best hydrolysis duration was found in three days. Meanwhile, bioactivity testing showed that the hydrolysate was a potent anticoagulant agent, but not prospective as antioxidant (IC50>200 ppm) or antibacterial agent (36% Staphylococcus aureus and Pseudomonas aeroginosa inhibition).

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Species of Ulva (Ulvophyceae, Chlorophyta) as indicators of salinity

Cited by 49 publications

References 65 publications

Species composition, diversity, and distribution of the genus Ulva along the coast of Jeju Island, Korea based on molecular phylogenetic analysis

Species composition, diversity, and distribution of the genus Ulva along the coast of Jeju Island, Korea based on molecular phylogenetic analysis

Phycoremediation of coastal waters contaminated with bisphenol A by green tidal algae Ulva prolifera

Optimasi Hidrolisis Mikrobiologi serta Bioaktivitas Antibakteri, Antioksidan, dan Antikoagulan Hidrolisat Ulva lactuca

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