Nikulin V.Yu., Sushchenko R.Z., Abdullin Sh.R., Nikulin A.Yu., Gontcharov A.A.
В журнале Phycologia
Год: 2025 Том: 64 Выпуск: 5 Страницы: 420–428
Novel strains of green microalgae were isolated during a study of soil algal diversity in the Russian Far East (Jewish Autonomous Region, Primorsky Territory) and characterized using an integrative taxonomic approach. Phylogenetic analysis based on nuclear (SSU and ITS rDNA) and chloroplast (tufA) DNA sequences resolved the strains as a distinct lineage in the generic clade of Coelastrella. Unique ITS2 sequence signatures, five unique substitutions/indels in helices II and III, further differentiated the new alga from congeners. Morphologically, our isolates resembled C. tenuitheca and C. chongqingensis having smooth cell wall without meridional ribs and polar thickenings (morphotype 3) but differed in smaller dimensions and autospore number (≥8). Our study supports description of a new species, Coelastrella laevis sp. nov. expanding the known diversity of Coelastrella and contributing to a better understanding of its phylogenetic and morphological variability.
