(Lycopodiaceae), a new species from China based on morphological characters and molecular evidence.

A new species of the firmoss from China, sp. nov., is described and illustrated based on morphological characters and molecular evidence.

Morphological and functional evolution of gametophytes in epilithic Hymenasplenium murakami-hatanakae (Aspleniaceae): The fifth family capable of producing the independent gametophytes.

The fern independent gametophytes that can maintain populations by vegetative reproduction without conspecific sporophytes have been considered an unusual phenomenon found in some epiphytic or epilithic species of Hymenophyllaceae, Pteridaceae, Lomariopsidaceae, and Polypodiaceae. By chance, the discovery of mysterious strap-like gametophytes on Izu-Oshima Island, Japan, has led to the hypothesis that Hymenasplenium murakami-hatanakae, a fern species belonging to Aspleniaceae, can also form independent gametophytes. Our investigation revealed gametophyte populations of H.

Subgenome evolutionary dynamics in allotetraploid ferns: insights from the gene expression patterns in the allotetraploid species (Thelypteridacea, Polypodiales).

Allopolyploidization often leads to disruptive conflicts among more than two sets of subgenomes, leading to genomic modifications and changes in gene expression. Although the evolutionary trajectories of subgenomes in allopolyploids have been studied intensely in angiosperms, the dynamics of subgenome evolution remain poorly understood in ferns, despite the prevalence of allopolyploidization. In this study, we have focused on an allotetraploid fern--and its diploid parental species, () and ().

 (Polypodiales, Polypodiaceae), a new species from Shan State of Myanmar.

A new species of the species-rich fern genus (Polypodiales, Polypodiaceae) has been found to occur in Shan state, Myanmar. is described based on morphological characters and phylogenetic evidence. Phylogenetic analyses showed that the specimens of formed a distinct clade nested in the clade.

 (Polypodiaceae), a new fern species from Myanmar.

The genus is a small, phylogenetically isolated genus belonging to the fern family Polypodiaceae. This study describes a new species, , based on collections obtained during field surveys of Shan State, Myanmar. This new species is distinct from other species of in its small size and presence of sclerenchyma strands in the rhizome.

Establishment of an allotetraploid fern species, Lepisorus yamaokae Seriz., between two highly niche-differentiated parental species.

Premise: The successful establishment of polyploid species is hypothesized to be promoted by niche differentiation from the parental species or by range shifts during climate oscillations. However, few studies have considered both of these factors simultaneously. We resolved the origin of a tetraploid fern, Lepisorus yamaokae, and explored a pattern of niche differentiation among the allotetraploid and parental species in past and current climates.

Evolution of genome space occupation in ferns: linking genome diversity and species richness.

Background And Aims: The dynamics of genome evolution caused by whole genome duplications and other processes are hypothesized to shape the diversification of plants and thus contribute to the astonishing variation in species richness among the main lineages of land plants. Ferns, the second most species-rich lineage of land plants, are highly suitable to test this hypothesis because of several unique features that distinguish fern genomes from those of seed plants. In this study, we tested the hypothesis that genome diversity and disparity shape fern species diversity by recording several parameters related to genome size and chromosome number.

Independent allopatric polyploidizations shaped the geographical structure and initial stage of reproductive isolation in an allotetraploid fern, Lepisorus nigripes (Polypodiaceae).

Although polyploidy is pervasive and its evolutionary significance has been recognized, it remains unclear how newly formed polyploid species become established. In particular, the impact of multiple origins on genetic differentiation among populations of a polyploid species and whether lineages of independent origins have different evolutionary potentials remain open questions. We used population genetic and phylogenetic approaches to identify genetic differentiation between lineages with independent origins within an allotetraploid fern, Lepisorus nigripes.

Correction to: Towards the conservation of the Mesozoic relict fern Christensenia: a fern species with extremely small populations in China.

In the original publication of the article, one of the author names, "Tao Fuijwara" was published incorrectly. The correct name is Tao Fujiwara.

Phylogenetic analysis reveals the origins of tetraploid and hexaploid species in the Japanese Lepisorus thunbergianus (Polypodiaceae) complex.

The Japanese Lepisorus thunbergianus complex contains diploid and tetraploid races of L. thunbergianus and a hexaploid species, L. mikawanus.

Allotetraploid cryptic species in Asplenium normale in the Japanese Archipelago, detected by chemotaxonomic and multi-locus genotype approaches.

Premise Of The Study: Delimitation of cryptic species provides an understanding of biodiversity and opportunities to elucidate speciation processes. Extensive flavonoid variation has been reported in the tetraploid cytotype of the fern, Asplenium normale, although related species have no intraspecific variations in flavonoid composition. We hypothesized that Japanese A.

Genkwanin 4'-O-glucosyl-(1 --> 2)-rhamnoside from new chemotype of Asplenium normale in Japan.

New flavone glycoside, genkwanin 4'-O-β-glucopyranosyl-(1 --> 2)-O-α-rhamnopyranoside was isolated from the fronds of new chemotype of Asplenium normale D. Don, together with two known C-glycosylflavones, vicenin-2 and lucenin-2. The chemical structure of the isolated glycoside was established by UV, LC-MS, characterization of acid hydrolysates, and 1H and 13C NMR spectroscopy.