Cirsium ×sudae

Michálková, Ester; Šmerda, Jakub; Knoll, A.; Bureš, Petr

doi:10.23855/preslia.2018.347

Cited by 3 publications

References 17 publications

(27 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

Hybridization may endanger the rare North Apennine endemic Cirsium bertolonii

et al. 2023

View full text Add to dashboard Cite

We examined populations of North Apennine stenoendemics Cirsium bertolonii in the Apuan Alps and Tuscan-Emilian Apennines and found individuals morphologically shifted to co-occurring C. acaulon or C. erisithales. Hybrid status of these intermediates was confirmed by flow cytometry, morphometrics and amplified fragment length polymorphism (AFLP). We interpreted these hybrids taxonomically as Cirsium ×sagrense (C. acaulon × C. bertolonii) and C. ×abetonense (C. bertolonii × C. erisithales). Estimated genome size (2C) was 2244 ± 31 Mbp for C. ×sagrense and 2152 ± 99 Mbp for C. ×abetonense. Their genomic GC content was 38.95 ± 0.35% and 38.77 ± 0.26%, respectively. Diploid chromosome number 2n = 34 was counted for C. bertolonii, and the previously reported 2n = 12 needs to be considered erroneous. We found C. bertolonii to be a gynodioecious species (like many other Cirsium species) that is not reproductively isolated by ploidy level or chromosome number from co-occurring congeners. The relatively frequent occurrence of C. ×sagrense in Monte Sagro (locus classicus of C. bertolonii) and the prevalence of C. ×abetonense in Alpe Tre Potenze suggest that hybridization occurs repeatedly in C. bertolonii, as also confirmed by older herbarium specimens. C. ×abetonense produces ripe achenes and F2 hybrids or backcrosses, as some other Cirsium hybrids do. Genetic erosion/swamping via interspecific hybridization can therefore pose a risk to the genetic integrity of C. bertolonii, as it does for some other narrowly endemic high-mountain Cirsium species in Europe.

show abstract

Hybridization may endanger the rare North Apennine endemic Cirsium bertolonii

et al. 2023

View full text Add to dashboard Cite

show abstract

Lophiolepis (=Cirsium Epitrachys seksiyonu) cinsine ait Türkiye’den yeni bir melez kaydı (Asteraceae, Carduinae)

ÖZCAN

2023

Artvin Çoruh Üniversitesi Orman Fakültesi Dergisi

View full text Add to dashboard Cite

Lophiolepis Cass., is newly separated from the genus Cirsium Miller in the light of recent molecular studies, belonging to the tribe Cardueae of the family Asteraceae (subtribe Carduinae). It has a high affinity to form interspecific and intersubspecific hybrids under certain circumstances. In the present study, one hybrid combination, Lophiolepis x trifurca (Petr.) Bureš, Del Guacchio, Iamonico & P.Caputo which was previously described as Cirsium x trifurcum Petrak by Petrak in 1914 from Bakuriani (Georgia) is newly recorded for Turkish Flora. The hybrid specimens have intermediate characters with parental species; Lophiolepis kosmelii (Adams) Bureš, Del Guacchio, Iamonico & P.Caputo and L. caucasica (Adams) Bureš, Del Guacchio, Iamonico & P.Caputo. Plant samples including parental species were collected from Şavşat district of Artvin province in sympatric populations. These specimens were carefully examined and compared with the putative parents, and morphological character measurements of hybrid plants, as well as parental species were carried out. Natural habits of the samples were photographed, drawings of cauline leaves were supplied using stereomicroscope, leaf micromorphological characters were determined and anatomical characteristics were compared with parents, in detail. In conclusion, intermediate morphological characteristics between L. x trifurca and its parents were determined in terms of features such as cauline leaves, phyllaries, capitula and corolla. It has spines in adaxial sides, uniseriate multicellular tomentose trichomes in abaxial ones. Cuticle has striate appearance near to the stomata/ trichome bases in abaxial surface and scale/granules are shown in adaxial parts. This taxon has amphistomatic leaves and dorsiventral mesophyll as in the parental species.

show abstract

Rare North Apennine endemic Cirsium bertolonii is endandgered by hybridization

Michálková

Šmerda

Plačková

et al. 2022

Preprint

View full text Add to dashboard Cite

We examined populations of North Apennine stenoendemics C. bertolonii in the Apuan Alps and Tuscan-Emilian Apennines and found individuals morphologically shifted to co-occurring C. acaulon or C. erisithales. Hybrid status of these intermediates we confirmed by flow cytometry, morphometrics and amplified fragment length polymorphism (AFLP) and interpreted them taxonomically as Cirsium ×sagrense (C. acaulon × C. bertolonii) and C. ×abetonense (C. bertolonii × C. erisithales). Estimated genome size (2C) was 2244 ± 31 Mbp for C. ×sagrense, and 2152 ± 99 Mbp for C. ×abetonense and their genomic GC content was 38.95 ± 0.35%, and 38.77 ± 0.26%, respectively. Diploid chromosome number 2n = 34 was counted for C. bertolonii and previously reported 2n = 12 needs to be considered erroneous. We found Cirsium bertolonii to be gynodioecious species (similarly as many other species of Cirsium sect. Cirsium) that is not reproductively isolated by different ploidy level or chromosome number from co-occurring congeners. The relatively frequent occurrence of C. ×sagrense in Monte Sagro (locus classicus of C. bertolonii) and the prevalence of C. ×abetonense in Alpe Tre Potenze suggest that hybridization occurs repeatedly in C. bertolonii, as also confirmed by older herbarium specimens. C. ×abetonense produces ripe achenes and F2 or backcrosses similarly as hybrids of other Cirsium-species. Genetic erosion/swamping via interspecific hybridization can therefore pose a serious risk to genetic integrity of C. bertolonii like in the case of some diploid narrowly endemic high mountain Cirsium species in Europe.

show abstract

Cirsium ×sudae

Cited by 3 publications

References 17 publications

Hybridization may endanger the rare North Apennine endemic Cirsium bertolonii

Hybridization may endanger the rare North Apennine endemic Cirsium bertolonii

Lophiolepis (=Cirsium Epitrachys seksiyonu) cinsine ait Türkiye’den yeni bir melez kaydı (Asteraceae, Carduinae)

Rare North Apennine endemic Cirsium bertolonii is endandgered by hybridization

Contact Info

Product

Resources

About