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21. Interaction With Fungi Promotes the Accumulation of Specific Defense Molecules in Orchid Tubers and May Increase the Value of Tubers for Biotechnological and Medicinal Applications: The Case Study of Interaction Between Dactylorhiza sp. and Tulasnella calospora

Author

Hampejsová, Romana, primary, Berka, Miroslav, additional, Berková, Veronika, additional, Jersáková, Jana, additional, Domkářová, Jaroslava, additional, von Rundstedt, Friederike, additional, Frary, Anne, additional, Saiz-Fernández, Iñigo, additional, Brzobohatý, Břetislav, additional, and Černý, Martin, additional

Published
2022
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24. The evolution of tachinid pollination in Neotinea ustulata is related to floral cuticular composition and the combined high relative production of (Z)‐11‐C23/C25enes.

Author

Martel, Carlos, Rakosy, Demetra, Romero, Pedro E., Jersáková, Jana, and Ayasse, Manfred

Subjects
ORCHIDS, POLLINATION, POLLINATORS, TACHINIDAE, ELECTROPHYSIOLOGY, BEES, ALKENES
Abstract

Among terrestrial orchids, and particularly among the subtribe Orchidinae, flies are underrepresented as pollinators. The European Neotinea ustulata, which developed specialized pollination by tachinid flies, is known to produce high relative concentrations of the floral cuticular alkenes (Z)‐11‐tricosene and (Z)‐11‐pentacosene (referred to as (Z)‐11‐C23/C25enes), which seem to be uncommon among orchid flowers. If the evolution of tachinid pollination is related to that of (Z)‐11‐C23/C25enes, we can expect that closely related species have a different floral chemical pattern and significantly small or no production of (Z)‐11‐C23/C25enes, independently of their pollinator guild identity (e.g., bees, flies, moths). We chemically compared the floral cuticular composition among Neotinea species, performed electrophysiological analyses, reconstructed the phylogenetic Orchidinae tree, and identified the evolutionary history of pollinator guild and (Z)‐11‐C23/C25enes production within the Orchidinae. Neotinea ustulata has evolved a markedly different floral cuticular composition compared to other Neotinea and produces both compounds ((Z)‐11‐C23/C25enes) in high relative quantities (i.e., above 8% in combination), which are detectable by tachinid antennae. Moreover, most Orchidinae taxa have minimal or no production of these alkenes, independently of the identity of their pollinator guild. Our ancestral reconstruction suggested that (Z)‐11‐C23/C25enes production was an evolutionary exaptation in Neotinea, whereas tachinid pollination was a unique evolutionary innovation for N. ustulata. Floral cuticular composition and, in particular, the combined production of (Z)‐11‐C23/C25enes at relatively high concentrations is intimately linked to the evolution of tachinid pollination within the Orchidinae. [ABSTRACT FROM AUTHOR]

Published
2023
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25. Minority cytotypes in European populations of the Gymnadenia conopsea complex (Orchidaceae) greatly increase intraspecific and intrapopulation diversity

Author

Trávníček, Pavel, Jersáková, Jana, Kubátová, Barbora, Krejcíková, Jana, Bateman, Richard M., Lučanová, Magdalena, Krajníková, Eva, Těšitelová, Tamara, Štípková, Zuzana, Amardeilh, Jean-Pierre, Brzosko, Emilia, Jermakowicz, Edyta, Cabanne, Olivier, Durka, Walter, Efimov, Peter, Hedrén, Mikael, Hermosilla, Carlos E., Kreutz, Karel, Kull, Tiiu, Tali, Kadri, Marchand, Olivier, Rey, Manel, Schiestl, Florian P., Čurn, Vladislav, and Suda, Jan

Published
2012

37. Specialization for tachinid fly pollination in the phenologically divergent varieties of the orchid Neotinea ustulata

Author

Martel, Carlos, Rakosy, Demetra, Dötterl, Stefan, Johnson, Stephen D., Ayasse, Manfred, Paulus, Hannes F., Nilsson, L. Anders, Mejlon, Hans, Jersáková, Jana, Martel, Carlos, Rakosy, Demetra, Dötterl, Stefan, Johnson, Stephen D., Ayasse, Manfred, Paulus, Hannes F., Nilsson, L. Anders, Mejlon, Hans, and Jersáková, Jana

Abstract

Despite increased focus on elucidating the various reproductive strategies employed by orchids, we still have only a rather limited understanding of deceptive pollination systems that are not bee- or wasp-mediated. In Europe, the orchid Neotinea ustulata has been known to consist of two phenologically divergent varieties, neither of which provide rewards to its pollinators. However, detailed studies of their reproductive biology have been lacking. Our study aimed to characterize and understand the floral traits (i.e., morphology, color, and scent chemistry) and reproductive biology of N. ustulata. We found that the two varieties differ in all their floral traits; furthermore, while Neotinea ustulata var. ustulata appears to be pollinated by both bees (e.g., Anthophora, Bombus) and flies (e.g., Dilophus, Tachina), var. aestivalis is pollinated almost entirely by flies (i.e., Nowickia, Tachina). Tachinids were also found to be much more effective than bees in removing pollinaria, and we show experimentally that they use the characteristic dark inflorescence top as a cue for approaching inflorescences. Our results thus suggest that while both N. ustulata varieties rely on tachinids for pollination, they differ in their degree of specialization. Further studies are, however, needed to fully understand the reproductive strategy of N. ustulata varieties., De två första författarna delar förstaförfattarskapet., Sensory Ecology of Plant-Pollinator Interactions

Published
2021
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39. Are Reproductive Traits Related to Pollen Limitation in Plants? A Case Study from a Central European Meadow

Author

Bartoš, Michael, Janeček, Štěpán, Janečková, Petra, Chmelová, Eliška, Tropek, Robert, Götzenberger, Lars, Klomberg, Yannick, and Jersáková, Jana

Subjects
pollen limitation, seed weight, lcsh:Botany, floral traits, otorhinolaryngologic diseases, food and beverages, supplemental hand-pollination, wet meadow, Article, seed number, lcsh:QK1-989
Abstract

The deficiency of pollen grains for ovule fertilization can be the main factor limiting plant reproduction and fitness. Because of the ongoing global changes, such as biodiversity loss and landscape fragmentation, a better knowledge of the prevalence and predictability of pollen limitation is challenging within current ecological research. In our study we used pollen supplementation to evaluate pollen limitation (at the level of seed number and weight) in 22 plant species growing in a wet semi-natural meadow. We investigated the correlation between the pollen limitation index (PL) and floral traits associated with plant reproduction or pollinator foraging behavior. We recorded significant pollen limitation for approximately 41% of species (9 out of 22 surveyed). Seven species had a significant positive response in seed production and two species increased in seed weight after pollen supplementation. Considering traits, PL significantly decreased with the number of pollinator functional groups. The relationship of PL with other examined traits was not supported by our results. The causes of pollen limitation may vary among species with regard to (1) different reproductive strategies and life history, and/or (2) temporary changes in influence of biotic and abiotic factors at a site.

Published
2020

40. Bookreviews

Author

Flegr, Jaroslav, Klimeš, Leoš, Březina, Stanislav, Ráb, Petr, Jersáková, Jana, Prach, Karel, and Vilímová, Jitka

Published
2006
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46. Drivers of vegetative dormancy across herbaceous perennial plant species

Author

Shefferson, Richard P., primary, Kull, Tiiu, additional, Hutchings, Michael J., additional, Selosse, Marc‐André, additional, Jacquemyn, Hans, additional, Kellett, Kimberly M., additional, Menges, Eric S., additional, Primack, Richard B., additional, Tuomi, Juha, additional, Alahuhta, Kirsi, additional, Hurskainen, Sonja, additional, Alexander, Helen M., additional, Anderson, Derek S., additional, Brys, Rein, additional, Brzosko, Emilia, additional, Dostálik, Slavomir, additional, Gregg, Katharine, additional, Ipser, Zdeněk, additional, Jäkäläniemi, Anne, additional, Jersáková, Jana, additional, Dean Kettle, W., additional, McCormick, Melissa K., additional, Mendoza, Ana, additional, Miller, Michael T., additional, Moen, Asbjørn, additional, Øien, Dag‐Inge, additional, Püttsepp, Ülle, additional, Roy, Mélanie, additional, Sather, Nancy, additional, Sletvold, Nina, additional, Štípková, Zuzana, additional, Tali, Kadri, additional, Warren, Robert J., additional, and Whigham, Dennis F., additional

Published
2018
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48. Minority cytotypes in European populations of the Gymnadenia conopsea complex (Orchidaceae) greatly increase intraspecific and intrapopulation diversity

Author

Trávníček, Pavel, Jersáková, Jana, Kubátová, Barbora, Krejčíková, Jana, Bateman, Richard M., Lučanová, Magdalena, Krajníková, Eva, Těšitelová, Tamara, Štípková, Zuzana, Amardeilh, Jean-Pierre, Brzosko, Emilia, Jermakowicz, Edyta, Cabanne, Olivier, Durka, Walter, Efimov, Peter, Hedrén, Mikael, Hermosilla, Carlos E., Kreutz, Karel, Kull, Tiiu, Tali, Kadri, Marchand, Olivier, Rey, Manel, Schiestl, Florian P., Čurn, Vladislav, Suda, Jan, Trávníček, Pavel, Jersáková, Jana, Kubátová, Barbora, Krejčíková, Jana, Bateman, Richard M., Lučanová, Magdalena, Krajníková, Eva, Těšitelová, Tamara, Štípková, Zuzana, Amardeilh, Jean-Pierre, Brzosko, Emilia, Jermakowicz, Edyta, Cabanne, Olivier, Durka, Walter, Efimov, Peter, Hedrén, Mikael, Hermosilla, Carlos E., Kreutz, Karel, Kull, Tiiu, Tali, Kadri, Marchand, Olivier, Rey, Manel, Schiestl, Florian P., Čurn, Vladislav, and Suda, Jan

Abstract

Background and Aims Patterns of ploidy variation among and within populations can provide valuable insights into the evolutionary mechanisms shaping the dynamics of plant systems showing ploidy diversity. Whereas data on majority ploidies are, by definition, often sufficiently extensive, much less is known about the incidence and evolutionary role of minority cytotypes. Methods Ploidy and proportions of endoreplicated genome were determined using DAPI (4',6-diamidino-2-phenylindole) flow cytometry in 6150 Gymnadenia plants (fragrant orchids) collected from 141 populations in 17 European countries. All widely recognized European species, and several taxa of less certain taxonomic status were sampled within Gymnadenia conopsea sensu lato. Key Results Most Gymnadenia populations were taxonomically and/or ploidy heterogeneous. Two majority (2x and 4x) and three minority (3x, 5x and 6x) cytotypes were identified. Evolution largely proceeded at the diploid level, whereas tetraploids were much more geographically and taxonomically restricted. Although minority ploidies constituted <2 % of the individuals sampled, they were found in 35 % of populations across the entire area investigated. The amount of nuclear DNA, together with the level of progressively partial endoreplication, separated all Gymnadenia species currently widely recognized in Europe. Conclusions Despite their low frequency, minority cytotypes substantially increase intraspecific and intrapopulation ploidy diversity estimates for fragrant orchids. The cytogenetic structure of Gymnadenia populations is remarkably dynamic and shaped by multiple evolutionary mechanisms, including both the ongoing production of unreduced gametes and heteroploid hybridization. Overall, it is likely that the level of ploidy heterogeneity experienced by most plant species/populations is currently underestimated; intensive sampling is necessary to obtain a holistic picture

Published
2017

50. The Enigma of Progressively Partial Endoreplication: New Insights Provided by Flow Cytometry and Next-Generation Sequencing

Author

Hřibová, Eva, primary, Holušová, Kateřina, additional, Trávníček, Pavel, additional, Petrovská, Beáta, additional, Ponert, Jan, additional, Šimková, Hana, additional, Kubátová, Barbora, additional, Jersáková, Jana, additional, Čurn, Vladislav, additional, Suda, Jan, additional, Doležel, Jaroslav, additional, and Vrána, Jan, additional

Published
2016
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