5 results on '"Sabovljevic, Marko"'
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2. Micropropagaçao in vitro do musgo raro Entosthodon Hungaricus (Funariaceae), ameaçado de extinçao
- Author
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Sabovljevic, Marko S., Beata Papp, Marko Sabovljevic, Vujicic, Milorad, Erzsebet Szurdoki, Gabriel Segarra-Moragues, Jose, Ministry of Education, Science and Technological Development (Serbia), and Ministerio de Ciencia e Innovación (España)
- Subjects
Entosthodon hungaricus ,QH301-705.5 ,Ex situ ,Musgo ,Agriculture ,Micropropagation ,Micropropagação ,Biological Sciences ,Biology (General) ,Moss ,musgo - Abstract
9 páginas, 3 figuras, 1 tabla., [EN] The moss Entosthodon hungaricus (Boros) Loeske is an European endemic species typical of dry and saline soils extending from the Iberian Peninsula to Aral-Caspian steppes, similarly to some other xerothermic bryophytes. However, the distribution range is fragmented and localities are quite scattered and the species is considered as rare and vulnerable because of its ephemeral characteristics and specialized ecology. With the aim to develop an active protection plan for this species, the ex situ conservation requirements of E. hungaricus were developed. The axenic culture in in vitro conditions were established, and the optimal growth parameters were adjusted to achieve fully developed gametophytes ready to be reintroduced to its native range and other potentially native areas, where this species was once reported but has not been collected in recent times, suggesting its local extinction (i.e. some areas in Vojvodina, N. Serbia). Starting materials were derived from recent herbarium specimens and from fresh materials collected from Hungarian populations. Several means for sterilization of stating material and growing nutritive media were assayed in different regimes of light and temperature. Here we describe the conditions to achieve full plant development and for its micropropagation. Such materials are adequate for ex situ conservation purposes and for experimental introductions in native and potentially native areas. The first axenical culture of E. hungaricus was successfully established, and the first in vitro micropropagation of this rare and endangered species was achieved. Our study contributes to the conservation biology as well as for the potential use of this moss species in biotechnological research., [BR] O musgo Entosthodon hungaricus (Boros) Loeske é uma espécie endêmica Européia típica de solos secos e salinos que se estendem da Península Ibérica até as estepes Aral-Cáspias, similar a outras briófitas de clima seco. Entretanto, a distribuição é bastante dispersa e fragmentada e a espécie é considerada muito rara e vulnerável devido às suas características efêmeras e ecologia especializada. Com o intuito de desenvolver um plano de proteção a essa espécie, foram elaborados os requisitos de preservação ex situ das E. hungaricus. As condições para a cultura axênica in vitro foram estabelecidas e os parâmetros ideais de crescimento foram atingidos para conseguir gametófitos completamente desenvolvidos, prontos para serem reintroduzidos em suas áreas nativas e em outras áreas potencialmente nativas, onde essa espécie já foi relatada. Porém, não houve coleta da mesma nos últimos anos, o que sugere uma extinção local (por exemplo, algumas áreas em Voivodina, Norte da Sérvia). Os materiais iniciais foram derivados de espécies recentes de herbários e de materiais frescos coletados de populações Húngaras. Várias formas de assepsia do material inicial e dos meios de crescimento nutritivo foram ensaiadas em diferentes regimes de luz e temperatura. No trabalho descrevemos as condições para obter desenvolvimento completo da planta e sua micropropagação. Os materiais são adequados para os fins de conservação ex situ e para as introduções experimentais em áreas nativas e/ou potencialmente nativas. O estudo contribui para a conservação biológica bem como para o potencial uso dessa espécie de musgo em pesquisas biotecnológicas., The Serbian Ministry of Science is acknowledged for the support grants 173024 and 173030, and the Serbian-Hungarian Bilateral cooperation entitled “Ex situ conservation of rare and endangered bryophytes in Hungary, Serbia and Europe”. JGS-M was supported by a Spanish Ministry of Science and Innovation “Ramón y Cajal” postdoctoral contract.
- Published
- 2012
3. Lamina Cell Shape and Cell Wall Thickness Are Useful Indicators for Metal Tolerance—An Example in Bryophytes.
- Author
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Petschinger, Katharina, Adlassnig, Wolfram, Sabovljevic, Marko S., Lang, Ingeborg, and Hacisalihoglu, Gokhan
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CELL morphology ,AIR quality monitoring ,BRYOPHYTES ,CROPS ,HEAVY metals - Abstract
Bryophytes are widely used to monitor air quality. Due to the lack of a cuticle, their cells can be compared to the roots of crop plants. This study aimed to test a hypothetical relation between metal tolerance and cell shape in biomonitoring mosses (Hypnum cupressiforme, Pleurozium schreberi, Pseudoscleropodium purum) and metal sensitive species (Physcomitrium patens, Plagiomnium affine). The tolerance experiments were conducted on leafy gametophytes exposed to solutions of ZnSO4, ZnCl
2 , and FeSO4 in graded concentrations of 1 M to 10−8 M. Plasmolysis in D-mannitol (0.8 M) was used as a viability measure. The selected species differed significantly in lamina cell shape, cell wall thickness, and metal tolerance. In those tested mosses, the lamina cell shape correlated significantly with the heavy metal tolerance, and we found differences for ZnSO4 and ZnCl2 . Biomonitoring species with long and thin cells proved more tolerant than species with isodiametric cells. For the latter, "death zones" at intermediate metal concentrations were found upon exposure to ZnSO4. Species with a greater tolerance towards FeSO4 and ZnSO4 had thicker cell walls than less tolerant species. Hence, cell shape as a protoplast-to-wall ratio, in combination with cell wall thickness, could be a good marker for metal tolerance. [ABSTRACT FROM AUTHOR]- Published
- 2021
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4. Potential antioxidant activity of the moss Bryum moravicum.
- Author
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Pejin, Boris, Bogdanovic-Pristov, Jelena, Pejin, Ivana, and Sabovljevic, Marko
- Abstract
A limited number of mosses has ever been studied regarding antioxidant activity among which only a few are European species. As a part of our ongoing screening of new promising bryophyte resources of natural antioxidants, a relevant biological activity investigation was conducted on the mossBryum moravicumPodp. (Bryaceae) collected in Germany. The antioxidant activity of an aqueous extract of the species was evaluatedin vitroby analysing its ABTS [2,2′-azino-bis(3-ethylbenzthiazoline-6-sulphonic acid)] cation scavenging activity and total phenolic content. The study led to the detection of a moderate antioxidant activity: 1 mg of the extract was equivalent to 84.56 ± 7.93 µg of ascorbic acid. The total phenolic content in 1 mg of the extract was equivalent to 356.44 ± 9.56 µg of ferulic acid used as a standard. These results have indicated for the first time potential importance ofB. moravicumin searching for novel antioxidant agents. [ABSTRACT FROM PUBLISHER]
- Published
- 2013
- Full Text
- View/download PDF
5. Antimicrobial activity of Bryum argenteum
- Author
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Sabovljevic, Aneta, Sokovic, Marina, Sabovljevic, Marko, and Grubisic, Dragoljub
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ANTI-infective agents , *DRUGS , *ESCHERICHIA coli , *MICROCOCCUS luteus - Abstract
Abstract: The antimicrobial activity of Bryum argenteum ethanol extracts was evaluated by microdilution method against four bacterial (Escherichia coli, Bacillus subtilis, Micrococcus luteus and Staphilococcus aureus) and four fungal species (Aspergillus niger, Penicillium ochrochloron, Candida albicans and Trichophyton mentagrophyes). All the investigated ethanol extracts have been proved to be active against all bacteria and fungi tested. [Copyright &y& Elsevier]
- Published
- 2006
- Full Text
- View/download PDF
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