Comprehensive analysis of the diatom genus Psammodictyon from Viet Nam: new species, molecular data, and fatty acid content
Year: 2025
Type: article
Abstract: Introduction Psammodictyon is a widely distributed marine diatom genus with a complex taxonomy and underestimated species diversity. Methods Light and scanning electron microscopy, phylogenetic analysis and gas chromatography were used for study of the newly isolated strains of Psammodictyon . Results Twelve strains of Psammodictyon were isolated from the coastal waters of central Viet Nam. Based on detailed morphological examinations using light and scanning electron microscopy, as well as molecular phylogenetic analysis, we propose six new species to science. Our phylogenetic analysis indicates that Psammodictyon forms a closely related monophyletic group. The resolution power of the short genetic markers (V4, V9 18S rRNA, V9-ITS1 18S rRNA, and a short region of rbcL ), which are widely used for metabarcoding, is also discussed. Analysis of the fatty acid content of seven Psammodictyon strains showed that, like most diatoms, they accumulate high levels of polyunsaturated fatty acids (29.44–42.62%) and monounsaturated fatty acids (20.2–23.2%). Conclusion The number of known species in the genus Psammodictyon has increased to 21. Psammodictyon strains may be considered as potential producers of long-chain omega-3 polyunsaturated fatty acids.
Source: Frontiers in Microbiology
Authors: Elena Kezlya, Dmitry Kapustin, Zinaida Krivova, Yevhen Maltsev, Lam Nguyen-Ngoc, Duyen Thi Ngoc Huynh, Hai Doan-Nhu, Maxim Kulikovskiy
Language: English
Topic: Diatoms and Algae Research
Subfield: Biomaterials
Field: Materials Science
Domain: Physical Sciences
Open Access status: gold
Estimated APC paid: $3,801
OpenAlex ID: W4417281121