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THAISZIA – JOURNAL OF BOTANY, Volume 24, 2014 – abstracts

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THAISZIA – JOURNAL OF BOTANY, Volume 24, 2014 – abstracts
vol. 24/1
vol. 24/2

Erdős L., Tölgyesi C., Dénes A., Darányi N., Fodor A., Bátori Z. & Tolnay D. (2014): Comparative analysis of the natural and seminatural plant communities of Mt Nagy and other parts of the Villány Mts (south Hungary). – Thaiszia – J. Bot. 24 (1): 1-21. – ISSN 1210-0420.

Abstract: The Villány Mts have a great nature conservation importance in Hungary, since large areas are covered with natural and near-natural sub-Mediterranean plant associations, providing habitat for several valuable species. However, the western parts of the Villány Mts, including Mt Nagy, are relatively understudied, though these may also harbour natural values of significant conservation importance. Based on 127 phytosociological relevés, we provide an analysis of the vegetation of Mt Nagy, in comparison with other parts of the Villány Mts. We carried out PCoA ordinations to assess the similarity of the plant communities of Mt Nagy to other parts of the Villány Mts. To characterize the naturalness of the habitats, we calculated social behaviour type spectra. We also calculated and compared the species richness of the communities. Finally, we compiled a list of protected and strictly protected plant species of Mt Nagy, based on a review of all earlier floristic publications as well as on our own observations. We found that the plant communities studied in the present article are in a good natural condition, although the calcareous scrubs and the open calcareous grasslands are degraded to a certain extent. Nevertheless, the social behaviour type spectra suggest that degradation is not too serious: although the proportion of disturbance-tolerants is high, the types indicating severe degradation (weeds, ruderal competitors and agressive aliens) are scarce or absent. The open calcareous grasslands of Mt Nagy proved to be extremely species rich. Despite its small size, the literature indicates that at least 29 protected and strictly protected plant species occur on Mt Nagy. We conclude that Mt Nagy deserves to be protected at a higher level, and should be regarded as a potential part of the Villány Mts Landscape Protection Area, designation of which is currently in progress.
Keywords: calcareous grassland, calcareous scrub, species richness, protected species, nature conservation.
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Gálusová T., Pružinová Ľ., Petrášová A., Šuvada R. & Kuna R. (2014): Xerothermic bryoflora in selected areas of Slovak Karst National Park. – Thaiszia – J. Bot. 24 (1): 23-34. – ISSN 1210-0420.

Abstract: The aim of this article is to present the results of the bryfloristic and ecological research carried out in selected areas of the Slovak Karst National Park in 2008. We detected 29 xerothermic bryophytes in total. Furthermore, the ecological characteristics evaluation of the recorded bryophyte species according to various factors is included, and we also described the occurrence of two potentially endangered species.
Keywords: bryophytes, the Slovak Karst National Park, xerothermic biotopes, ecological factors.
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Turis P., Kliment J., Feráková V., Dítě D., Eliáš P., Hrivnák R., Košťál J., Šuvada R., Mráz P. & Bernátová D. (2014): Red List of vascular plants of the Carpathian part of Slovakia. – Thaiszia – J. Bot. 24 (1): 35-87. – ISSN 1210-0420.

Abstract: The paper presents the first Red List of vascular plants of the Carpathian part of Slovakia created according to the actual Guidelines for Application of IUCN Red List Criteria using also the up to now unofficial categories and additional (qualifying) criteria. It contains 1,001 taxa of native plants, archaeophytes and some neophytes representing approximately 25% of the native taxa of the flora of Slovakia and 40% of taxa present in the Slovak Carpathians. Out of them 46 are Regionally Extinct (category RE), 18 missing [1 taxon in the category EX?, 4 taxa in the category RE?, 13 taxa in the category CR(PE)], 461 threatened [149 taxa Critically Endangered (category CR), 141 taxa Endangered (category EN), 171 taxa Vulnerable (category VU)], 290 Near Threatened (category NT), 103 Least Concern (category LC). Seventy six taxa are assessed in the category Data Deficient (DD), and 7 taxa are listed under Not Applicable (category NA) because of their unclear taxonomic status.
Keywords: Red List, threatened species, ferns and flowering plants, Slovakia, Carpathians.
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Chehregani Rad A. & Hajisadeghian S. (2014): Microsporogenesis, megasporogenesis and gametophyte development in Senecio glaucus L.. – Thaiszia – J. Bot. 24 (2): 89-100. – ISSN 1210-0420.

Abstract: Sporogenesis and gametophyte development in Senecio glaucus were studied in this study. Flowers and buds in different developmental stages were removed, fixed in FAA70 , stored in 70% ethanol, embedded in paraffin and sectioned at 7-10 μm with a microtome. Staining was carried out with PAS and contrasted with Hematoxylin. The results showed that anthers are tetrasporangiate and anther tapetum is of the amoeboid type. Microspore tetrads are tetrahedral and isobilatral. Pollen grains are bicellular at shedding time. The most of microspores (about 60%) are large in size and vacuolated considerably. They degenerated in the late stages of anther development but smaller ones are functional microspores. Ovule is anatropous, unitegmic and tenuinucellate. A 7-celled embryo sac is formed corresponding to the Polygonum type. The shape of megaspore tetrads is both tetrahedral and T-form. Functional megaspore is the chalazal one. Embryo sac is very small at the beginning of development, so that its nuclei are arranged as linear, but later its size increases. Antipodal cells are perennial and their number increases up to 8-14. Their nuclei become polyploid. They were also able to form an embryo at the chalazal pole in about 30% of florets, which detects gametophytic apomixis in this taxon. S. glaucus may be considered facutatively apomictic species with predominating sexual reproduction.
Keywords: Asteraceae, microsporogenesis, megasporogenesis, agamospermy, Senecio glaucus.
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Eliáš P. jun., Dítě D., Hajnalová M. & Eliašová M. (2014): Current occurrence of rare weed Camelina rumelica (ČELAK.) VELEN. in Slovakia. – Thaiszia – J. Bot. 24 (2): 101-109. – ISSN 1210-0420.

Abstract: Recent occurrence of Camelina rumelica was investigated during 2003 – 2012. Only three localities were confirmed in Slovakia now (Kamenica nad Hronom, Bajtava, Vŕšok Nature Reserve). The species was not recently confirmed in natural and semi-natural pioneer xerothermic habitats, we have found it only in grassland vegetation from alliances Arhhenatherion elatioris and Festucion valesiaceae, occasionally also in field edges as a member of communities of Caucalidion lappulae. According to IUCN categories and criteria, we suppose to classify C. rumelica as critically endangered species of Slovak flora [CR A2ac; B2a(i)b(iii,iv,v)c(iv)].
Keywords: Camelina, occurence, Slovakia, weeds
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Jakubisová M., Jakubis M. & Lukáčik I. (2014): Simulation of bank protective effect of black alder root system (Alnus glutinosa (L.) GAERTNER) according to RipRoot Model. – Thaiszia – J. Bot. 24 (2): 111-124. – ISSN 1210-0420.

Abstract: The paper deals with the significance of black alder (Alnus glutinosa (L.) GAERTNER) in connection with its bank protective function on torrent Hučava in geomorphological unit Poľana. Main goal was through simulation to show development of additional cohesion (cr) and factor of stability (Fs) on 22 experimental profiles (EP) with vegetational bank protection taking account its density, age and root reinforcement. Data were calculated according to RipRoot model (POLLEN-BANKHEAD & SIMON 2009) and BSTEM (SIMON et al. 2009). We analyze potential development cr (kPa) and Fs of black alder trees with using RipRoot model (Root Reinforcement Model) which was developed on this purposes in USA. According to simulation we found that the greatest additional cohesion (kPa) has black alder in range age from 30 to 60 years in dependency on number of stems per unit area (for example for 100% coverage at range age 30 – 60 years is additional cohesion in range from 14.34 to 14.78 kPa and 50% coverage in range from 7.17 to 7.84 kPa). Reduction of coverage percentage significantly decreases the value of the additional cohesion for example from value cr = 14.34 kPa for the 100% coverage, to value cr = 4.67 kPa for the 5% coverage 30 year old black alder. Simulated results show that different density of vegetation on the banks may to change the degree of stability of bank in the range of 3 degrees, from unstable, over conditional stable, to stable. Through the interventions into number of trees per unit area we can change the stability of the bank. We also found that for the further development of cr and Fs is very important age of trees and soil type. Dependence Fs = f (cr) were statistically tested.
Keywords: black alder, riparian vegetation, bank stability, additional cohesion, RipRoot Model
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Király G., Eliáš P. jun. & Dítě D. (2014): Two thermophilic alien species new to the flora of Slovakia. – Thaiszia – J. Bot. 24 (2): 125-134. – ISSN 1210-0420.

Abstract: Dittrichia graveolens (L.) GREUTER and Euphorbia prostrata AITON were reported for the first time from the territory of Slovakia. The first one was recorded near Kúty (W Slovakia) at the highway D2; its occurrence was already expected in view of its welldocumented expansion along the roads of Austria and the Czech Republic. The second species grows in a city pavement in Banská Bystrica (Central Slovakia); as a notable very isolated population existing probably due to the urban heat island effect.
Keywords: alien species, invasion, highways, urban heat effect
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Eliáš P. jun., Dítě D. & Melečková M. (2014): The occurrence of critically endangered Trifolium strictum in Slovakia confirmed. – Thaiszia – J. Bot. 24 (2): 135-141. – ISSN 1210-0420.

Abstract: A new locality of critically endangered Trifolium strictum was found in saline grasslands near Jatov settlement in 2013 one year after their ploughing. The species has rarely grown in a species-rich ruderal stage of former halophytic vegetation of the Festucion pseudovinae alliance. Next year, T. strictum occupied larger areas in mesic stands within the Alopecurion pratensis alliance. Since we did not confirm the occurrence of the species on the historical site at Kamenný Most village, the site near Jatov is the only locality of the species in Slovakia. According to IUCN categories and criteria (IUCN 2012), we suggest to classify T. strictum as critically endangered species [CR B2a(ii)b(iii,iv,v)c(iv)].
Keywords: clover, distribution range, halophytes, rare species
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Mártonfiová L., Danova K., Toteva V.K. & Čellárová E. (2014): Karyotype analysis of Hypericum rumeliacum BOISS.. – Thaiszia – J. Bot. 24 (2): 143-150. – ISSN 1210-0420.

Abstract: Karyotype of the Balkan endemic, Hypericum rumeliacum, was studied using root tip meristems of in vitro propagated plants. The absolute length of the chromosomes varied between 0.97 and 1.59 μm. The karyotype formula of the basic chromosome set (x = 7) was 3m + 1msat + 3sm. Karyotype data were compared with other karyotype data for the genus Hypericum avaliable in literature. Only one common chromosome type – substantially bigger chromosome, is clearly distinguishable in some of the species. The other chromosomes are small, median to submedian and often difficult to distinguish due to their small size. Asymmetry index is low in Hypericum rumeliacum and other species with available karyotype data suggesting that they underwent no major karyotype rearrangements in their evolutionary pathway.
Keywords: Hypericum spp., endemic species, chromosomes, asymmetry index, in vitro cultured plants
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