Puccinellia fontana (Portal) Amarell &amp; T. Gregor comb. et stat. nov. – ein halophytisches Gras Mittel- und Westeuropas

Amarell, Uwe; Gregor, Thomas

doi:10.21248/kochia.v14.122

Cited by 2 publications

(7 citation statements)

References 5 publications

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“…Diploids, in accord with the already known occurrences ( Amarell and Gregor, 2021 ), were confirmed in a small area in Central Germany. Climatic niche modelling supported a general habitat unsuitability in other regions.…”

Section: Discussionsupporting

confidence: 79%

“…from Italy, and it is not clear whether the mentioned chromosome counts come from Italian populations at all. There are only a few published records of diploid Puccinellia from the European inland: Avdulow (1931) – European part of Russia, Montserrat and Montserrat (1988) – Spain, and Amarell and Gregor (2021) – Germany. Therefore, the diploids from Italy, found so far only in two close localities of mud volcanos, probably represent the first verifiable report of diploids from this country.…”

Section: Discussionmentioning

confidence: 99%

“…peisonis (Beck) Jáv., and P . fontana (Portal) Amarell & T. Gregor ( Englmaier, 1982 ; Moravcová et al., 2001 ; Amarell and Gregor, 2021 ). Several other, less accepted species have also been described ( P .…”

Section: Introductionmentioning

confidence: 99%

“…limosa and P . peisonis considered tetraploid; Englmaier, 1982 ; Conert, 1994 ; Amarell and Gregor, 2021 ), no large-scale study investigating the relationship between cytotype and taxonomic diversity in P . distans agg.…”

Section: Introductionmentioning

confidence: 99%

“…In Central Europe, the taxonomically challenging complex of P. distans comprises four main species: P. distans s. str., P. limosa (Schur) Holmb., P. peisonis (Beck) Jav., and P. fontana (Portal) Amarell & T. Gregor (Englmaier, 1982;Moravcováet al, 2001;Amarell and Gregor, 2021). Several other, less accepted species have also been described (P. intermedia (Schur) Janch., Schur, 1866;P.…”

Section: Introductionmentioning

confidence: 99%

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Cryptic invasion suggested by a cytogeographic analysis of the halophytic Puccinellia distans complex (Poaceae) in Central Europe

Kúr,

Gregor,

Jandová

et al. 2023

Front. Plant Sci.

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IntroductionDespite the wealth of studies dealing with the invasions of alien plants, invasions of alien genotypes of native species (cryptic invasions) have been vastly neglected. The impact of cryptic invasions on the biodiversity of plant communities can, however, be significant. Inland saline habitats and halophytes (i.e., salt-tolerant plant species) are especially threatened by this phenomenon as they inhabit fragmented remnants of largely destroyed habitats, but at the same time some of these halophytic species are rapidly spreading along salt-treated roads. To study potential cryptic invasion of halophytes, the patterns of genome size and ploidy variation in the Puccinellia distans complex (Poaceae), the most rapidly spreading roadside halophyte in Central Europe, were investigated.MethodsDNA flow cytometry with confirmatory chromosome counts were employed to assess ploidy levels of 1414 individuals from 133 populations of the P. distans complex. In addition, climatic niche modelling was used to predict the distributions of selected cytotypes.ResultsEight groups differing in ploidy level and/or genome size were discovered, one diploid (2x; 2n = 14), two tetraploid (4xA, 4xB; 2n = 28), one pentaploid (5x; 2n = 35), three hexaploid (6xA, 6xB, 6xC; 2n = 42), and one heptaploid (7x; 2n = 49). The hexaploids (mostly the 6xC cytotype) were widespread through the study area, spreading intensively in both anthropogenic and natural habitats and probably hybridizing with the natural habitat dwelling tetraploids. In contrast, the non-hexaploid cytotypes rarely spread and were predominantly confined to natural habitats.DiscussionThe extensive spread of the hexaploid cytotypes along roadsides has most likely facilitated their incursion into natural habitats. The colonization of new natural habitats by the hexaploids may pose a threat to the indigenous Puccinellia populations by compromising their genetic integrity and/or by outcompeting them.

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Section: Discussionsupporting

confidence: 79%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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