Genetic diversity and population structure of Corollospora maritima sensu lato: new insights from population genetics
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Patricia Velez
Patricia Velez earned her PhD in Fungal Ecology from the National Autonomous University of Mexico in 2014 for her work on the community structure of marine arenicolous fungi from the Gulf of Mexico and the population genetics of
Corollospora maritima . She has previously worked on the comparative transcriptomics of this cosmopolitan marine fungus, and in the fungal ecology of an oligotrophic freshwater system. Currently she is a postdoctoral researcher at the Centro de Investigación Científica y Educación Superior de Ensenada (CICESE) and her work focuses on the molecular ecology of marine fungal communities from deep-sea sediments.
,
Jaime Gasca-Pineda
Jaime Gasca-Pineda is currently a postdoctoral researcher at the Centro de Investigación Científica y Educación Superior de Ensenada (CICESE). He received his PhD in Biomedical Sciences from the National Autonomous University of Mexico in 2015 for his work on the population genetics of bighorn sheep and bison from Mexico. He has also conducted research on the molecular ecology of wild maize and microbial communities. More recently, his postdoctoral research has focused on the population genomics of ichthyoplankton from the Gulf of Mexico.
Akira Nakagiri is a Professor at the Faculty of Agriculture, Fungus/Mushroom Resource and Research Center, University of Tottori. In 2014, he received an award from the former Japan Society for Culture Collections (current Japan Society for Microbial Resources and Systematics) for his contributions to fungal taxonomy and to the preservation of fungal cultures. His research areas range from fungal taxonomy and ecology of marine taxa to the preservation of fungal cultures. He is a specialist in marine fungal taxonomy and biology, having described several new taxa including members of the genus
Corollospora .Richard T. Hanlin, Professor Emeritus at the University of Georgia, retired in 2001 after 41 years in the Department of Plant Pathology. He continues to serve as a part-time curator of the Miller Mycology Herbarium in the Museum of Natural History. He is a member of the Mycological Society of America, served as vice president and president, and is a recipient of the society’s W. H. Weston Award for Teaching Excellence in Mycology and Distinguished Mycologist Award.
María C. González received her DSc from the National Autonomous University of Mexico. She is presently a permanent researcher at the Institute of Biology at the same university, where she teaches mycology in graduate level courses and conducts research on the biology of microscopic fungi from freshwater and marine habitats in Mexico.
Abstract
The study of genetic variation in fungi has been poor since the development of the theoretical underpinnings of population genetics, specifically in marine taxa. Corollospora maritima sensu lato is an abundant cosmopolitan marine fungus, playing a crucial ecological role in the intertidal environment. We evaluated the extent and distribution of the genetic diversity in the nuclear ribosomal internal transcribed spacer region of 110 isolates of this ascomycete from 19 locations in the Gulf of Mexico, Caribbean Sea and Pacific Ocean. The diversity estimates demonstrated that C. maritima sensu lato possesses a high genetic diversity compared to other cosmopolitan fungi, with the highest levels of variability in the Caribbean Sea. Globally, we registered 28 haplotypes, out of which 11 were specific to the Caribbean Sea, implying these populations are genetically unique. We detected populations inhabiting human-impacted sites with null genetic variation. As long-term exposure to contaminants has been proven to decrease genetic diversity, a conservation genetics approach to assess this matter is urgent. Our results revealed the occurrence of five genetic lineages with distinctive environmental preferences and an overlapping geographical distribution, agreeing with previous studies reporting physiological races within this species.
About the authors
Patricia Velez earned her PhD in Fungal Ecology from the National Autonomous University of Mexico in 2014 for her work on the community structure of marine arenicolous fungi from the Gulf of Mexico and the population genetics of Corollospora maritima. She has previously worked on the comparative transcriptomics of this cosmopolitan marine fungus, and in the fungal ecology of an oligotrophic freshwater system. Currently she is a postdoctoral researcher at the Centro de Investigación Científica y Educación Superior de Ensenada (CICESE) and her work focuses on the molecular ecology of marine fungal communities from deep-sea sediments.
Jaime Gasca-Pineda is currently a postdoctoral researcher at the Centro de Investigación Científica y Educación Superior de Ensenada (CICESE). He received his PhD in Biomedical Sciences from the National Autonomous University of Mexico in 2015 for his work on the population genetics of bighorn sheep and bison from Mexico. He has also conducted research on the molecular ecology of wild maize and microbial communities. More recently, his postdoctoral research has focused on the population genomics of ichthyoplankton from the Gulf of Mexico.
Akira Nakagiri is a Professor at the Faculty of Agriculture, Fungus/Mushroom Resource and Research Center, University of Tottori. In 2014, he received an award from the former Japan Society for Culture Collections (current Japan Society for Microbial Resources and Systematics) for his contributions to fungal taxonomy and to the preservation of fungal cultures. His research areas range from fungal taxonomy and ecology of marine taxa to the preservation of fungal cultures. He is a specialist in marine fungal taxonomy and biology, having described several new taxa including members of the genus Corollospora.
Richard T. Hanlin, Professor Emeritus at the University of Georgia, retired in 2001 after 41 years in the Department of Plant Pathology. He continues to serve as a part-time curator of the Miller Mycology Herbarium in the Museum of Natural History. He is a member of the Mycological Society of America, served as vice president and president, and is a recipient of the society’s W. H. Weston Award for Teaching Excellence in Mycology and Distinguished Mycologist Award.
María C. González received her DSc from the National Autonomous University of Mexico. She is presently a permanent researcher at the Institute of Biology at the same university, where she teaches mycology in graduate level courses and conducts research on the biology of microscopic fungi from freshwater and marine habitats in Mexico.
Acknowledgments
This research was supported by the Institute of Biology, National Autonomous University of Mexico, and by the Consejo Nacional de Ciencia y Tecnología (CONACyT), project number CB 60502. Patricia Velez also thanks the fellowship provided by the CONACyT. The authors recognize the help provided during the fieldwork in the Mexican states of Tabasco, Campeche and Veracruz by Edmundo Rosique-Gil and Silvia Capello from the División Académica de Ciencias Biológicas, Universidad Juárez Autónoma de Tabasco, as well as Sergio Martínez from the Centro de Biodiversidad y Descubrimiento de Drogas, INDICASAT-AIP, Xavier Alvarez from the Facultad de Ciencias Naturales, Universidad de Guayaquil, staff of the Instituto de Oceanología, Christian Quintero and Jan Hanlin for the assistance in the sample collection of Panama, Ecuador, Cuba, Sonora State in Mexico, and Hawaii, respectively. We would also like to extend our sincere appreciation to anonymous reviewers for their valuable comments.
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Articles in the same Issue
- Frontmatter
- In this issue
- Research articles
- Fungal diversity of marine biofilms on artificial reefs in the north-central Gulf of Mexico
- Genetic diversity and population structure of Corollospora maritima sensu lato: new insights from population genetics
- Fatty acid production of tropical thraustochytrids from Malaysian mangroves
- A new genus Phyllophorella gen. nov. (Phyllophoraceae, Rhodophyta) from central Peru, including Phyllophorella peruviana comb. nov., Phyllophorella humboldtiana sp. nov., and Phyllophorella limaensis sp. nov.
- Morphology and phylogeny of Pterosiphonia dendroidea (Rhodomelaceae, Ceramiales) described as Pterosiphonia tanakae from Japan
- Cryptic diversity of the mangrove-associated alga Bostrychia (Rhodomelaceae, Rhodophyta) from Thailand
- Clump structure, population structure and non-destructive biomass estimation of the New Zealand carrageenophyte Sarcothalia lanceata (Gigartinaceae, Rhodophyta)
- Desiccation tolerance and underlying mechanisms for the recovery of the photosynthetic efficiency in the tropical intertidal seagrasses Halophila ovalis and Thalassia hemprichii
Articles in the same Issue
- Frontmatter
- In this issue
- Research articles
- Fungal diversity of marine biofilms on artificial reefs in the north-central Gulf of Mexico
- Genetic diversity and population structure of Corollospora maritima sensu lato: new insights from population genetics
- Fatty acid production of tropical thraustochytrids from Malaysian mangroves
- A new genus Phyllophorella gen. nov. (Phyllophoraceae, Rhodophyta) from central Peru, including Phyllophorella peruviana comb. nov., Phyllophorella humboldtiana sp. nov., and Phyllophorella limaensis sp. nov.
- Morphology and phylogeny of Pterosiphonia dendroidea (Rhodomelaceae, Ceramiales) described as Pterosiphonia tanakae from Japan
- Cryptic diversity of the mangrove-associated alga Bostrychia (Rhodomelaceae, Rhodophyta) from Thailand
- Clump structure, population structure and non-destructive biomass estimation of the New Zealand carrageenophyte Sarcothalia lanceata (Gigartinaceae, Rhodophyta)
- Desiccation tolerance and underlying mechanisms for the recovery of the photosynthetic efficiency in the tropical intertidal seagrasses Halophila ovalis and Thalassia hemprichii
