Article
Plant Sciences
Javier Carmona Jimenez, Angela Caro Borrero, Itzel Becerra-Absalon, Elvira Perona Urizar, Kenia Marquez Santamaria, Pilar Mateo Ortega
Summary: This study describes two new Nostoc species, N. montejanii and N. tlalocii, based on a polyphasic approach that combines morphological, ecological, and genetic characteristics. The two new species showed clear differences in their habitat preferences and possesses distinct morphological features. The 16S rRNA gene sequences and phylogenetic analyses revealed their close relationship to the Nostoc genus.
JOURNAL OF PHYCOLOGY
(2023)
Article
Plant Sciences
Glenn B. McGregor, Barbara C. Sendall, Yuko Niiyama, Akihiro Tuji, Anusuya Willis
Summary: The true branching characteristic is known only in two cyanobacteria, Umezakia natans and Dolichospermum brachiatum. This study evaluated the phylogeny of Umezakia natans and its relationship to Chrysosporum ovalisporum, suggesting that they should be classified in the same genus.
JOURNAL OF PHYCOLOGY
(2023)
Article
Biodiversity Conservation
Shuheng Li, Denghang Yu, Hang Zhang, Renhui Li, Fangfang Cai
Summary: A new algal species, Cartusia hunanesis sp. nov., was discovered in a stream in Hunan, China. Two strains (ZJJ02 and ZJJ03) were studied using morphology, ecology, and molecular data (16S rRNA gene and ITS region). Compared to the type species Cartusia fontana, C. hunanesis has only one trichome in the sheath and large granules near the cross wall. Phylogenetic analysis based on the 16S rRNA gene revealed that the investigated strains of C. hunanesis are closely related to C. fontana. Additionally, Cartusia was found to cluster with members of the family Oculatellaceae, including the genera Pegethrix and Elainella. The ITS region of C. hunanesis showed significant differences in secondary structure compared to C. fontana, indicating that it is a novel species.
Article
Plant Sciences
Forrest W. Lefler, David E. Berthold, H. Dail Laughinghouse
Summary: The study focused on sampling and studying benthic cyanobacterial mats from select locations in South Florida, revealing new cyanobacterial taxa, such as the new genus Affixifilum and new species A. floridanum and N. biscaynensis.
JOURNAL OF PHYCOLOGY
(2021)
Article
Biodiversity Conservation
Denis Davydov, Anna Vilnet, Irina Novakovskaya, Elena Patova
Summary: The strains of Drouetiella species from a terrestrial biotope in the Arctic and Subarctic areas of European Russia were isolated and characterized using an integrative approach. The study showed the morphological plasticity of Drouetiella species and identified a new taxon. The analysis of 16S-23S ITS rRNA sequences revealed differences in length and nucleotide composition, affecting the hypothetical secondary structures of certain helices.
Article
Biodiversity Conservation
Wei Chen, Shuyin Li, Yuanzhao Xu, Ruozhen Geng, Gaofei Song, Peiming Ma
Summary: A coccoid-like cyanobacterium isolated from Caohai Lake in China was characterized and named Cyanodorina ovale based on morphological, electron microscopic, and molecular phylogenetic analyses.
Article
Biodiversity Conservation
Naresh Kumar, Aniket Saraf, Sagarika Pal, Prashant Singh
Summary: In this study, two cyanobacterial strains KUT1-PS and 18C-PS from India were characterized using a polyphasic approach. The morphological characterization indicated that both strains belonged to the genus Cylindrospermum. Phylogenetic analyses at the genus and species levels provided evidence that strain 18C-PS is a representative of Cylindrospermum badium, while strain KUT1-PS is a novel species referred to as Cylindrospermum solincola sp. nov. This study emphasizes the importance of comparing newly sequenced strains with established species for taxonomic interpretations.
Article
Biodiversity Conservation
Maria Christodoulou, Matti Wahlsten, Kaarina Sivonen
Summary: Cyanobacteria found in both aquatic and terrestrial environments have been extensively studied in Finland, but the diversity of terrestrial rock-inhabiting cyanobacteria is often ignored. In this study, two Pseudanabaena-like cyanobacterial strains were isolated and characterized using a polyphasic approach. Phylogenetic analyses using both 16S rRNA gene and 16S-23S ITS region revealed better resolution of species relationships, and based on these analyses, two new species were described. The study also highlighted the need for taxonomic revision in the poorly studied cyanobacterial genus Pseudanabaena.
Article
Plant Sciences
Shamil R. Abdullin, Arthur Yu Nikulin, Veronika B. Bagmet, Vyacheslav Yu Nikulin, Andrey A. Gontcharov
Summary: A new coccoid cyanobacterium, Aliterella vladivostokensis, was described from an urban aerophytic habitat in Vladivostok, Russia, using a polyphasic approach. Despite high morphological similarity with A. antarctica, differences in 16S-23S internal transcribed spacer sequences and unique mutations allowed the establishment of a new species.
Article
Microbiology
Sagarika Pal, Aniket Saraf, Naresh Kumar, Arush Singh, Utkarsh Talukdar, Niraj Kohar, Prashant Singh
Summary: In this study, a novel cyanobacterial genus, Johanseniella gen. nov., was isolated from Tripura, Northeast India. The taxonomic status of the strain URH-6-PS was found to be distinct from the genus Cylindrospermum, and the results indicated the need for revision of the Clade I taxonomy. The establishment of a new genus provides valuable insights into the taxonomic complexities surrounding the genus Cylindrospermum.
FEMS MICROBIOLOGY LETTERS
(2022)
Article
Microbiology
Joseph R. Petrone, Paula Rios Glusberger, Christian D. George, Patricia L. Milletich, Angelica P. Ahrens, Luiz Fernando Wurdig Roesch, Eric W. Triplett
Summary: Despite the availability of third-generation sequencing technologies, Illumina sequencing is still widely used in modern bacterial ecology studies for phylogenetic classification. Nanopore sequencing has now become a leading method for performing differential bacterial abundance analysis due to its ease, cost, and portability. A pipeline called RESCUE was developed to sequence bacterial rrn operons and improve taxonomic resolution, and it was shown to accurately classify species and resolve errors caused by short reads.
FRONTIERS IN MICROBIOLOGY
(2023)
Article
Plant Sciences
Glenn B. McGregor, Barbara C. Sendall
Summary: Phenotypic plasticity in cyanobacteria provides adaptive strategies to cope with environmental changes, manifesting in morphological, physiological, or behavioral responses. Determining if variable phenotypes are evolved via adaptive genetic change is a key challenge in research.
Article
Biology
Hamieh Goshtasbi, Ehsan Atazadeh, Ali Movafeghi
Summary: Instability of morphological and physiological characteristics under different environmental conditions can lead to misidentification of cyanobacteria. This study successfully identified three cyanobacteria species from an Iranian wetland using morphological, molecular, and biochemical data. The results confirmed the effectiveness of molecular markers and biochemical parameters in reliable identification of cyanobacteria.
Article
Entomology
Roland Bamou, Adama Zan Diarra, Marie Paul Audrey Mayi, Borel Djiappi-Tchamen, Christophe Antonio-Nkondjio, Philippe Parola
Summary: Wolbachia bacteria, which can change host biology and suppress vector population, were found in 8 out of 22 mosquito species collected in Cameroon. Main vectors of diseases like dengue and malaria were not infected, while other species like C. moucheti showed relatively high infection rates. Further characterization of the Wolbachia strains is warranted.
Article
Plant Sciences
Sandeep Chakraborty, Veerabadhran Maruthanayagam, Anushree Achari, Arnab Pramanik, Parasuraman Jaisankar, Joydeep Mukherjee
Summary: The study isolated two novel cyanobacteria, AP3 and AP3b, with AP3b being established as a new mono-specific genus named Aerofilum fasciculatum, and AP3 identified as the second novel species under the genus Euryhalinema, referred to as Euryhalinema pallustris. These two cyanobacteria showed significant individual differences and uniqueness in 16S rRNA phylogeny data and folding patterns of semi-conservative structures.
Article
Plant Sciences
Sandra C. Akagham, Jeffrey R. Johansen, Dike Nwankwo, Kedong Yin
Article
Plant Sciences
Laura Gonzalez-Resendiz, Jeffrey R. Johansen, Hilda Leon-Tijera, Leon Sanchez, Claudia Segal-Kischinevzky, Viviana Escobar-Sanchez, Marcia Morales
JOURNAL OF PHYCOLOGY
(2019)
Article
Plant Sciences
Nicole Pietrasiak, Karina Osorio-Santos, Sergei Shalygin, Michael P. Martin, Jeffrey R. Johansen
JOURNAL OF PHYCOLOGY
(2019)
Article
Plant Sciences
Sergei Shalygin, Regina R. Shalygina, Vera V. Redkina, Cory B. Gargas, Jeffrey R. Johansen
Article
Plant Sciences
Melaku Mesfin, Jeffrey R. Johansen, Nicole Pietrasiak, Lauren M. Baldarelli
Article
Plant Sciences
Jiri Komarek, Jeffrey R. Johansen, Jan Smarda, Otakar Strunecky
Article
Plant Sciences
Nicole Pietrasiak, Sharon Reeve, Karina Osorio-Santos, David A. Lipson, Jeffrey R. Johansen
Summary: Cyanobacteria are vital components of dryland soils and the newly described genus Trichotorquatus is based on four new species isolated from various regions in California, USA and Chile. These species are morphologically distinct but phylogenetically closely related, with potential for further differentiation using molecular data. The study highlights the challenge of recognizing diversity in this cryptic genus due to the presence of multiple ribosomal operons.
JOURNAL OF PHYCOLOGY
(2021)
Article
Plant Sciences
Jeffrey R. Johansen, Laura Gonzalez-Resendiz, Viviana Escobar-Sanchez, Claudia Segal-Kischinevzky, Jose Martinez-Yerena, Joaquin Hernandez-Sanchez, Gabriela Hernandez-Perez, Hilda Leon-Tejera
Summary: A number of heterocytous, tapering cyanobacteria in the Rivulariaceae family have been observed on the Atlantic and Pacific coasts, with new species characterized and described from the coasts of Mexico. Genetic separation based on the 16S-23S ITS region was pronounced. Despite the addition of new species, Nunduva and Kyrtuthrix remain morphologically and phylogenetically separate.
JOURNAL OF PHYCOLOGY
(2021)
Article
Microbiology
Ryan D. Ward, Jason E. Stajich, Jeffrey R. Johansen, Marcel Huntemann, Alicia Clum, Brian Foster, Bryce Foster, Simon Roux, Krishnaveni Palaniappan, Neha Varghese, Supratim Mukherjee, T. B. K. Reddy, Chris Daum, Alex Copeland, I-M A. Chen, Natalia N. Ivanova, Nikos C. Kyrpides, Nicole Shapiro, Emiley A. Eloe-Fadrosh, Nicole Pietrasiak
Summary: Metagenomes of 50 terrestrial cyanobacterial cultures have been constructed to support phylogenomic studies of evolutionary relationships and gene content among these unique algae and their aquatic relatives.
MICROBIOLOGY RESOURCE ANNOUNCEMENTS
(2021)
Article
Marine & Freshwater Biology
I-Shuo Huang, Nicole Pietrasiak, Christopher J. Gobler, Jeffrey R. Johansen, JoAnn M. Burkholder, Sue D'Antonio, Paul Zimba
Summary: Cyanobacterial blooms have been on the rise due to climate change and human activities, leading to the accumulation of bioactive compounds that can impact human health and the environment. This study analyzed bioactive metabolites in 71 genera of cyanobacteria from different habitats, revealing varying patterns of metabolite production among freshwater, marine, and terrestrial genera. The findings provide valuable insights for environmental management and highlight the toxin potential of terrestrial cyanobacteria.
Article
Plant Sciences
Amber O. Brown, Caitlin S. Romanis, Petr Dvorak, Amanda J. Foss, Quincy A. Gibson, Chelsea D. Villanueva, Wendy N. Durden, Alyssa D. Garvey, Phillip Jenkins, Petr Hasler, Jeffrey R. Johansen, Brett A. Neilan, Dale A. Casamatta
Summary: Two cyanobacterial strains collected from St. Johns River in Jacksonville, Florida, were identified as a new species, Komarekiella delphini-convector, with similar 16S rRNA gene sequences. However, there is controversy over their toxin-producing potential, and further analysis is needed to determine their pathogenicity.
Article
Plant Sciences
Lauren M. Baldarelli, Nicole Pietrasiak, Karina Osorio-Santos, Jeffrey R. Johansen
Summary: This study described two new Mojavia species from the Atacama Desert in Chile and the Mojave Desert in the USA, which strengthened Mojavia's position as a sister genus to Nostoc. The two new species exhibited unique morphological and ecological characteristics, as well as clear differences from Nostoc.
JOURNAL OF PHYCOLOGY
(2022)
Article
Biodiversity Conservation
Lira A. Gaysina, Jeffrey R. Johansen, Aniket Saraf, Rezeda Z. Allaguvatova, Sagarika Pal, Prashant Singh
Summary: A new species of the genus Roholtiella, Roholtiella volcanica sp. nov., was discovered during the study of biodiversity of cyanobacteria in Gorely volcano soils. Morphological, ecological, and phylogenetic analyses were conducted to describe and classify the new species. This research contributes to the understanding of cyanobacterial diversity and taxonomy.
Article
Biodiversity Conservation
Jan Kastovsky, Jeffrey R. Johansen, Radka Hauerova, Mildred U. Akagha
Summary: In this study, cyanobacterial samples were collected from thermal sites in Yellowstone National Park, and the richness of filamentous cyanobacteria was discussed. A new genus and several new species were described, and the merging of other genera was proposed based on molecular data analysis.
Article
Ecology
L. A. Gaysina, A. Fazlutdinova, N. Mukhina, L. E. Akhrnadeyeva, D. Yu Rogozin, A. O. Bul'khin, N. Sulehanova, J. R. Johansen
THEORETICAL AND APPLIED ECOLOGY
(2020)
