Article
Plant Sciences
Ni-Ni Win, Takeaki Hanyuda, Aki Kato, Hiromori Shimabukuro, Masayuki Uchimura, Hiroshi Kawai, Mutsunori Tokeshi
Summary: The taxonomic status and species diversity of the brown algal genus Padina were assessed based on DNA sequences and morpho-anatomy, revealing the presence of four distinct new species. The phylogenetic analyses provided insights into the biogeographic characteristics of Padina, with species in the Pacific Ocean showing shared distributions. Molecular time trees indicated an estimated divergence time for the genus Padina in the mid-Cretaceous.
JOURNAL OF PHYCOLOGY
(2021)
Article
Plant Sciences
Lan-Anh T. Tran, Quinten Bafort, Frederique Steen, Amelia Gomez Garreta, Sofie D'Hondt, Kathy Ann Miller, Sofie Vranken, Ante Zuljevic, Jennifer E. Smith, Olivier De Clerck
Summary: This study reports the presence of Dictyota cyanoloma in southern California, which is supported by genetic sequences and microsatellite markers. The Californian specimens show close affinity with European populations. The distribution of this species in southern California stretches from San Diego Bay to Santa Catalina Island and Long Beach Harbor, with shipping identified as a likely transport mechanism.
JOURNAL OF PHYCOLOGY
(2021)
Article
Multidisciplinary Sciences
Hiroshi Kawai, Takeaki Hanyuda
Summary: A new genus and species of brown algae, Setoutiphycus delamareoides gen. & sp. nov., was described in this study. This species, similar to Delamarea but distinct in certain aspects, was found in the Seto Inland Sea. It is suggested that the species may have survived in refugia in southern Japan during the last glacial maximums, rather than evolving within the Seto Inland Sea itself.
SCIENTIFIC REPORTS
(2021)
Article
Plant Sciences
Christophe Vieira, Olivier De Clerck, Antoine De Ramon N'Yeurt, Sofie D'hondt, Laurent Millet, Myung Sook Kim, Claude Payri, Mayalen Zubia
Summary: In this study, we used an integrative taxonomic approach to re-evaluate the diversity of Lobophora. Our findings show that French Polynesia has at least 37 Lobophora species, with over half of them being endemic. French Polynesia shares a high biogeographic affinity with the Melanesian Islands and has connections to the western Indian Ocean and the Atlantic. We propose that Lobophora species in French Polynesia mainly evolved from colonizers originating from the Central Indo-Pacific, resulting in high endemism in remote archipelagos.
EUROPEAN JOURNAL OF PHYCOLOGY
(2023)
Article
Ecology
Christophe Vieira, Frederique Steen, Sofie D'hondt, Quinten Bafort, Lennert Tyberghein, Cindy Fernandez-Garcia, Brian Wysor, Ana Tronholm, Lydiane Mattio, Claude Payri, Hiroshi Kawai, Gary Saunders, Frederik Leliaert, Heroen Verbruggen, Olivier De Clerck
Summary: Using Dictyotales as a model, this study investigates the historical biogeographical and diversification patterns of brown seaweeds. Results show that Dictyotales originated in the Middle Jurassic and reached peak diversity in the Central Indo-Pacific. Diversification rates were generally higher in tropical regions, with different clades driven by different processes.
JOURNAL OF BIOGEOGRAPHY
(2021)
Article
Biotechnology & Applied Microbiology
Marwa Drira, Jamila Ben Mohamed, Hajer Ben Hlima, Faiez Hentati, Philippe Michaud, Slim Abdelkafi, Imen Fendri
Summary: The use of P. pavonica extracts positively impacts plant growth, enhancing plant tolerance to salinity and improving reactive oxygen species scavenging ability.
ALGAL RESEARCH-BIOMASS BIOFUELS AND BIOPRODUCTS
(2021)
Article
Plant Sciences
Valerie Kwan, Zhi Ting Yip, Jenny Fong, Danwei Huang
Summary: This study assessed the diversity and phylogeny of the brown macroalgal genus Lobophora in Singapore, revealing four species including three formally described ones and one undescribed putative species. These findings replace the previous record of an Atlantic species in Singapore and suggest that there may be more species to be discovered in the biodiverse region of Southeast Asia.
Article
Biotechnology & Applied Microbiology
Jose Avila-Peltroche, Boo Yeon Won, Tae Oh Cho
Summary: This study reports the successful isolation and regeneration of protoplasts from P. fascia using commercial enzymes. The production of protoplasts was enhanced by adjusting osmolarity, chelation pre-treatment, and short incubation time. Antibiotics and temperature did not significantly affect the regeneration and morphological development of the protoplasts.
JOURNAL OF APPLIED PHYCOLOGY
(2022)
Article
Plant Sciences
Ilaria Pagana, Genny Marroccia, Giuliana Marletta, Giuseppina Alongi
Summary: This study expands knowledge on the distribution and biodiversity of the genus Padina in Sicily and the Mediterranean Sea through the examination of samples and herbarium specimens.
Article
Biotechnology & Applied Microbiology
Benoit Paix, Christophe Vieira, Philippe Potin, Catherine Leblanc, Olivier De Clerck, Jean-Francois Briand, Gerald Culioli
Summary: Marine macroalgae and their microbiota form functional units with diverse interactions, influenced by environment, host taxonomy, and surface metabolome. This study found clear differences between Mediterranean and Brittany seaweeds, potentially due to environmental variations in different geographical areas.
ALGAL RESEARCH-BIOMASS BIOFUELS AND BIOPRODUCTS
(2021)
Article
Plant Sciences
Ni-Ni-Win, Mya-Kyawt-Wai, Paul John L. Geraldino, Lawrence M. Liao, Chaw-Thiri P. P. Aye, Ni NiMar, Takeaki Hanyuda, Hiroshi Kawai, Mutsunori Tokeshi
Summary: This study investigates the taxonomy, species diversity, and geographical distribution of the marine brown algal genus Padina in tropical South-East Asian waters. It reveals two new species from Myanmar and new distributional records for four Padina species, indicating elevated species diversity in central Indo-Pacific waters.
EUROPEAN JOURNAL OF PHYCOLOGY
(2022)
Article
Limnology
Zhongmin Sun, Minh Dong Dao, Quoc Toan Tran, Duc Tien Dam
Summary: A new species Lobophora tsengii is described from Bach Long Vy (Bailongwei) Island, Haiphong Province, Vietnam, with morphological similarities to plants from Hainan Island, China. Molecular phylogenetic analyses show that the specimens from the island form a clade separated from other Lobophora species.
JOURNAL OF OCEANOLOGY AND LIMNOLOGY
(2021)
Article
Microbiology
Jessica Melanie Wong Chin, Daneshwar Puchooa, Theeshan Bahorun, Vidushi S. Neergheen, Aadil Ahmad Aullybux, Girish Beedessee, Nadeem Nazurally, Abdulwahed Fahad Alrefaei, Rajesh Jeewon
Summary: Marine fungi associated with sponges and brown algae in Mauritius were analyzed using Illumina sequencing, revealing unknown fungal diversity in these organisms. The study found that the sponge Biemna sp. and the brown algae Turbinaria conoides had the highest fungal diversity. The location of sampling did not significantly influence the fungal diversity.
FRONTIERS IN MICROBIOLOGY
(2022)
Article
Agriculture, Dairy & Animal Science
Najmeh Sheikhzadeh, Ehsan Ahmadifar, Mehdi Soltani, Hossein Tayefi-Nasrabadi, Shalaleh Mousavi, Mohammed A. E. Naiel
Summary: This study found that feeding Padina australis can promote the growth and general health of common carp. Feeding common carp with Padina australis ethyl acetate extract for 8 weeks improved their growth performance, digestive enzyme activity, immune response, and disease resistance to Aeromonas hydrophila infection.
Article
Biotechnology & Applied Microbiology
Priya Prakash Sharma, V Baskaran
Summary: The study demonstrated that the isolated fucoxanthin, polysaccharides, and total lipids from Indian brown algae have potential anti-obesity and antioxidant effects, reducing obesity and lipid levels induced by high-fat diet, and regulating adipogenesis and thermogenesis through multiple signaling pathways.
ALGAL RESEARCH-BIOMASS BIOFUELS AND BIOPRODUCTS
(2021)
Article
Plant Sciences
Conxi Rodriguez-Prieto, Olivier De Clerck, Michael D. Guiry, Showe-Mei Lin
Summary: The classification of the genera Grateloupia, Phyllymenia, and Prionitis remains controversial and relies on the anatomy of female reproductive structures and phylogenetic reconstructions. A new species of Prionitis was discovered in Taiwan, revealing common characteristics of female reproductive structures among related species and supporting a monophyletic relationship based on combined rbcL and LSU rDNA sequence analyses. Further reinvestigation into the female reproductive structures of Grateloupia sensu lato species closely related to Prionitis and Phyllymenia is needed for resolving the systematics of the Halymeniaceae.
JOURNAL OF PHYCOLOGY
(2022)
Article
Plant Sciences
Frederik Leliaert, Emily L. A. Kelly, Jan Janouskovec, Michael D. Fox, Maggie D. Johnson, Farran M. Redfern, Taati Eria, Andreas F. Haas, Enric Sala, Stuart A. Sandin, Jennifer E. Smith
Summary: A new marine green alga, Brilliantia kiribatiensis gen. et sp. nov., has been discovered in the coral reefs of the Southern Line Islands in the Pacific Ocean. This new alga belongs to the Boodleaceae family in the Cladophorales order. It has a unique structure of upright, unbranched, single-celled filaments attached to the substratum, and is largely restricted to the Southern Line Islands, with some observations on neighboring islands as well.
JOURNAL OF PHYCOLOGY
(2022)
Article
Plant Sciences
Christophe Vieira, Olivier De Clerck, Antoine De Ramon N'Yeurt, Sofie D'hondt, Laurent Millet, Myung Sook Kim, Claude Payri, Mayalen Zubia
Summary: In this study, we used an integrative taxonomic approach to re-evaluate the diversity of Lobophora. Our findings show that French Polynesia has at least 37 Lobophora species, with over half of them being endemic. French Polynesia shares a high biogeographic affinity with the Melanesian Islands and has connections to the western Indian Ocean and the Atlantic. We propose that Lobophora species in French Polynesia mainly evolved from colonizers originating from the Central Indo-Pacific, resulting in high endemism in remote archipelagos.
EUROPEAN JOURNAL OF PHYCOLOGY
(2023)
Article
Plant Sciences
Razy Hoffman, Olivier De Clerck, Frederik Leliaert
Summary: We provide an account of two newly recorded non-indigenous tropical seaweed species, Siphonocladus tropicus and Caulerpa integerrima, found in the Levantine Mediterranean Sea. Morphological and molecular evidence supports the reports, which also indicate the possible origin and pathways of introduction for these species.
EUROPEAN JOURNAL OF PHYCOLOGY
(2023)
Article
Marine & Freshwater Biology
Lan-Anh T Tran, Frederik Leliaert, Christophe Vieira, Tien V Tran, Tu V Nguyen, Tien D Dam, Olivier De Clerck
Summary: The species diversity of Ulva in Vietnam was investigated using genetic markers, resulting in the identification of 19 species. Seven species were recorded for the first time in Vietnam, and some genetic clusters could not be matched with species names. The study also found that the species composition in Vietnam is similar to adjacent countries and highlights the importance of molecular data in assessing Ulva diversity. Additionally, the research suggests that there may be undiscovered diversity in tropical regions.
PHYCOLOGICAL RESEARCH
(2023)
Article
Evolutionary Biology
Quinten Bafort, Tian Wu, Annelore Natran, Olivier De Clerck, Yves Van de Peer
Summary: The immediate effects of plant polyploidization contribute to polyploid establishment through morphological, physiological, developmental, and phenological changes. However, studies on the relationship between the immediate effects of whole-genome duplication and the environment are limited but suggest that stressful conditions can alter these effects. In this study, a common garden experiment on the greater duckweed Spirodela polyrhiza was conducted to test whether the immediate effects of WGD can facilitate tetraploid duckweed establishment under two environmental stressors. The results indicate that WGD can confer a fitness advantage under stressful conditions, and the effects of the environment on ploidy-induced changes are strain-specific.
Article
Plant Sciences
Ponprom Pisuttimarn, Ana Rita Giraldes Simoes, Fernanda Satori Petrongari, Rosangela Simao-Bianchini, Juliana Cruz Jardim Barbosa, Ine De Man, Luiz Henrique Martins Fonseca, Steven B. Janssens, Sujit B. Patil, Vinod B. Shimpale, Pimwadee Pornpongrungrueng, Frederik Leliaert, Lars W. Chatrou
Summary: Distimake vitifolius comb. nov. (Convolvulaceae) is reclassified from Camonea vitifolia based on molecular, morphological and palynological data. The occurrence of hexazonocolpate pollen in both Distimake and Camonea is found to be the result of convergent evolution. This reclassification demonstrates the importance of reciprocal interpretation of different sources of evidence in systematic studies.
BOTANICAL JOURNAL OF THE LINNEAN SOCIETY
(2023)
Article
Plant Sciences
Soria Delva, Camino Fernandez de la Hoz, Quinten Bafort, Sofie D'hondt, Soha Shabaka, Sarah Hamdy Rashedy, Alison R. Sherwood, Tamar Guy-Haim, Alvaro Israel, Olivier De Clerck
Summary: In this study, we investigate the introduction of Dictyota acutiloba in the Mediterranean Sea and provided an updated distribution of this species, which was believed to be limited to the Pacific Ocean. Genetic analysis and ecological niche models confirmed the presence of D. acutiloba in Indo-Pacific regions and along the Israeli coastline in the southeastern Mediterranean Sea. The close genetic relationship between introduced specimens and those from the Red Sea suggests an introduction through the Suez Canal. The further spread of D. acutiloba in the eastern Mediterranean is likely, with possible extension into the western Mediterranean Sea, depending on climate change scenarios.
EUROPEAN JOURNAL OF PHYCOLOGY
(2023)
Article
Plant Sciences
Jonas Blomme, Thomas Wichard, Thomas B. Jacobs, Olivier De Clerck
Summary: Green seaweeds, particularly Ulva species, have various morphologies and ecological roles, making them important for research in carbon assimilation, bacteria interactions, life cycle, and economic benefits. Ulva mutabilis/compressa is suggested as a model species and the article highlights available molecular data and tools for further research. Exciting developments in other Ulva species are also discussed.
JOURNAL OF PHYCOLOGY
(2023)
Article
Environmental Sciences
Soria Delva, Bernard De Baets, Jan M. Baetens, Olivier De Clerck, Willem Stock
Summary: This study investigated whether the thermal tolerance of the brown seaweed Dictyota dichotoma can be enhanced by adding bacteria from its natural environment. The results showed that bacterial supplementation did not affect the growth of the seaweed over the full thermal gradient, suggesting that ecological bacterial rescue may not play a role in mitigating the effects of ocean warming on this brown seaweed.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Environmental Sciences
Francesco Paolo Mancuso, Kathryn Lee Morrissey, Olivier De Clerck, Laura Airoldi
Summary: Warming and nutrient enrichment have significant effects on the physiology and survival of foundation species in both aquatic and terrestrial ecosystems. However, the mechanisms underlying these effects and the role of microbial communities have been overlooked in experiments. This study examined the impacts of air warming and nutrient enrichment on a seaweed species and its associated bacterial communities. The results showed that the two stressors had additive, antagonistic, and synergistic interactions on the abundance of bacterial taxa, and they mainly affected metabolic pathways associated with seaweed disease, degradation of cell-wall polymers, and algicidal processes. These findings highlight the dysregulation of seaweed microbiomes by warming and nutrient enrichment, providing a potential mechanism for their ongoing loss.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Biology
Christophe Vieira, Myung Sook Kim, Antoine De Ramon N'Yeurt, Claude Payri, Sofie D'Hondt, Olivier De Clerck, Mayalen Zubia
Summary: This study utilized DNA barcoding to revise the species diversity of French Polynesian marine flora, resulting in the identification of a total of 702 species, including 119 Chlorophyta, 169 Cyanobacteria, 92 Ochrophyta, 320 Rhodophyta, and 2 seagrass species. This research also provides a valuable DNA barcode reference library for identification purposes and future taxonomic and conservation studies.
Article
Food Science & Technology
Marie Willocx, Iris Van der Beeten, Pieter Asselman, Lynn Delgat, Wim Baert, Steven B. Janssens, Frederik Leliaert, Jean-Francois Picron, Celine Vanhee
Summary: High value commodities like spices often face contaminations of both chemical and biological origin. Current methods for quality control and safety monitoring suffer from limitations. Two independent studies found contaminations in cumin and green anise spice seeds that exceeded the threshold value established by the European Union. These studies used DNA metabarcoding to identify the predominant contamination from the Hello-tropium genus. However, the use of DNA-based identification remains controversial. Our research demonstrates that a combinatory approach of microscopy, chemical analysis, and DNA barcoding can provide qualitative and quantitative information on the contaminants in spice seeds. The presence of a small number of Heliotropium sp. seeds is enough to surpass the threshold value, highlighting the importance of weed control.
FOOD CHEMISTRY: MOLECULAR SCIENCES
(2022)