No endemic Isoëtes (Isoëtaceae) species in the North Asian Pacific evidenced by genetic and morphological analysis

IF 1.9 4区生物学 Q2 MARINE & FRESHWATER BIOLOGY

Aquatic Botany Pub Date : 2024-12-02 DOI:10.1016/j.aquabot.2024.103850

Maxim Yu. Grigoryan , Polina A. Volkova , Maria O. Ivanova , Olga A. Mochalova , Maria D. Logacheva , Tatyana V. Neretina , Alexander A. Bobrov

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引用次数: 0

Abstract

The genus Isoëtes is a unique group of lycophytes that offers valuable insights into plant evolution. However, taxonomic issues and evolutionary pathways within the genus require further study, particularly in North-East Asia, where only representatives of the I. echinospora complex occur. We studied genetic (nuclear DNA LFY2int and IBR3 regions, transcriptomes) and morphological (size and ornamentation of mega- and microspores, velum coverage) variability of Isoëtes populations, focusing on the Russian Far East. We found no clear genetic and morphological differentiation between European and North Asian populations of diploid I. echinospora s.l. (the latter was referred to as I. asiatica), not supporting treatment of I. asiatica as a separate species. The finding of samples with spiny papillate microspores in some North Asian populations of I. echinospora s.l. (neither differentiated by the other morphological characters, nor genetically) is of particular interest. Genetic analysis of the North Asian Pacific tetraploid I. maritima (initially referred to as I. beringensis) revealed its origin from diploid progenitors close to I. echinospora and North American I. bolanderi or I. howellii, as has been shown earlier for North American populations. This finding supports treatment of the North Asian and North American populations of I. maritima as one species, in line with their morphological similarity.

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来源期刊

Aquatic Botany 生物-海洋与淡水生物学

CiteScore

3.80

自引率

5.60%

发文量

审稿时长

6 months

期刊介绍： Aquatic Botany offers a platform for papers relevant to a broad international readership on fundamental and applied aspects of marine and freshwater macroscopic plants in a context of ecology or environmental biology. This includes molecular, biochemical and physiological aspects of macroscopic aquatic plants as well as the classification, structure, function, dynamics and ecological interactions in plant-dominated aquatic communities and ecosystems. It is an outlet for papers dealing with research on the consequences of disturbance and stressors (e.g. environmental fluctuations and climate change, pollution, grazing and pathogens), use and management of aquatic plants (plant production and decomposition, commercial harvest, plant control) and the conservation of aquatic plant communities (breeding, transplantation and restoration). Specialized publications on certain rare taxa or papers on aquatic macroscopic plants from under-represented regions in the world can also find their place, subject to editor evaluation. Studies on fungi or microalgae will remain outside the scope of Aquatic Botany.