Sexual reproduction of the ultrahalophilic diatom Nitzschia siwaschica sp. nov

被引：0
|
作者：
Davidovich, Nickolai [1 ,2 ]
Davidovich, Olga [1 ]
Nikulin, Vyacheslav [3 ]
Cvjetinovic, Julijana [2 ]
Gorin, Dmitry A. [2 ]
机构：
[1] Russian Acad Sci, Karadag Sci Stn Nat Reserve, Feodosiya 298188, Russia
[2] Skolkovo Inst Sci & Technol, Ctr Photon Sci & Engn, 30 Bolshoy Blvd, bld 1, Moscow, Russia
[3] Russian Acad Sci, Fed Sci Ctr East Asia Terr Biodivers, Far Eastern Branch, Vladivostok 690022, Russia
来源：
PHYCOLOGIA | 2025年 / 64卷 / 01期
基金：
俄罗斯科学基金会;
关键词：
Cis-anisogamy; Halophyte; Heterothally; Salinity tolerance; Sigmoid diatoms; LIFE-CYCLE; GRUNOW; SEA; AUXOSPORULATION; BACILLARIOPHYTA; TAXONOMY; SYSTEM; GENUS;
D O I：
10.1080/00318884.2025.2471608
中图分类号：
Q94 [植物学];
学科分类号：
071001 ;
摘要：
We describe the sexual reproduction and breeding behaviour of a novel sigmoid pennate diatom Nitzschia siwaschica sp. nov. To date, sexual reproduction has been described in 21 representatives of the highly heterogeneous genus Nitzschia, including three sigmoid freshwater species. Nitzschia siwaschica originates from a hypersaline environment. The specific growth rate of N. siwaschica weakly depended on salinity levels, varying from 0.75 to 0.99 divisions per day, across salinity levels from 10 to 100 psu. This diatom exhibited heterothallic sexual reproduction. Compatible pairs of clones were able to reproduce sexually in the relatively broad range of salinities, 20-80 psu. According to Geitler's classification, the pattern of sexual process in this species (cis-anisogamy) corresponds to type IA2b. Furthermore, we determine the phylogenetic relationships of N. siwaschica with other Nitzschia species to provide a comprehensive understanding of the species' evolutionary position.
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页码：55 / 70
页数：16
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