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001-es BibID:BIBFORM108225
035-os BibID:(WoS)000423708500013 (Scopus)85041279914
Első szerző:Bateman, Richard M.
Cím:Integrating restriction site-associated DNA sequencing (RAD-seq) with morphological cladistic analysis clarifies evolutionary relationships among major species groups of bee orchids / Richard M. Bateman, Gábor Sramkó, Ovidiu Paun
Dátum:2018
ISSN:0305-7364 1095-8290
Tárgyszavak:Természettudományok Biológiai tudományok idegen nyelvű folyóiratközlemény külföldi lapban
folyóiratcikk
Megjelenés:Annals Of Botany. - 121 : 1 (2018), p. 85-105. -
További szerzők:Sramkó Gábor (1981-) (biológus) Paun, Ovidiu
Pályázati támogatás:PD109686
OTKA
LP2016-9/2017
MTA
Internet cím:Szerző által megadott URL
DOI
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2.

001-es BibID:BIBFORM007359
Első szerző:Solti Ádám
Cím:Impact of Iron Supply on the Kinetics of Recovery of Photosynthesis in Cd-stressed Poplar (Populus glauca) / Ádám Solti, László Gáspár, Ilona Mészáros, Zoltán Szigeti, László Lévai, Éva Sárvári
Dátum:2008
Megjegyzések:Background and Aims: Cadmium (Cd) causes Fe-deficiency-like symptoms in plants, and strongly inhibits photosynthesis. To clarify the importance of Cd-induced Fe deficiency in Cd effects on photosynthesis, the recovery processes were studied by supplying excess Fe after the Cd symptoms had developed. Methods: Fe-citrate at 10 mM or 50 mM was given with or without 10 mM Cd(NO3)2 to hydroponically cultured poplars (Populus glauca 'Kopeczkii') with characteristic Cd symptoms. Ion, chlorophyll and pigment contents, amount of photosynthetic pigment-protein complexes, chlorophyll fluorescence and carbon assimilation were measured together with the mapping of healing processes by fluorescence imaging. Key Results: In regenerated leaves, the iron content increased significantly, while the Cd content did not decrease. As a result, the structural (increase in the amount of photosynthetic pigments and pigment-protein complexes, decrease in the F690/F740 ratio) and functional (elevation of CO2 fixation activity and DF/Fm 0) recovery of the photosynthetic machinery was detected. Cd-induced, light-stress-related changes in non-photochemical quenching, activity of the xanthophyll cycle, and the F440/F520 ratio were also normalized. Imaging the changes in chlorophyll fluorescence, the recovery started from the parts adjacent to the veins and gradually extended to the interveinal parts. Kinetically, the rate of recovery depended greatly on the extent of the Fe supply, and chlorophyll a/b ratio and DF/Fm 0 proved to be the most-rapidly reacting parameters. Conclusions: Iron deficiency is a key factor in Cd-induced inhibition of photosynthesis.
Tárgyszavak:Természettudományok Biológiai tudományok idegen nyelvű folyóiratközlemény külföldi lapban
Cadmium
chlorofill-protein
iron deficiency
poplar
Populus glauca Haines 1906 var. Kopeczkii
fluorescence imaging
chlorophyll fluorescence induction
Megjelenés:Annals of Botany. - 102 : 5 (2008), p. 771-782. -
További szerzők:Gáspár László Szigeti Zoltán Lévai László (1951-) (agrármérnök, mérnöktanár) Sárvári Éva Mészáros Ilona (1952-) (biológus)
Internet cím:elektronikus változat
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DOI
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3.

001-es BibID:BIBFORM082713
035-os BibID:(WoS)000503880300015 (Scopus)85073582914
Első szerző:Sramkó Gábor (biológus)
Cím:Iterative allogamy-autogamy transitions drive actual and incipient speciation during the ongoing evolutionary radiation within the orchid genus Epipactis (Orchidaceae) / Gábor Sramkó, Ovidiu Paun, Marie K. Brandrud, Levente Laczkó, Attila Molnár V., Richard M. Bateman
Dátum:2019
ISSN:0305-7364 1095-8290
Megjegyzések:Background and Aims The terrestrial orchid genus Epipactis has become a model system for the study of speciation via transitions from allogamy to autogamy, but close phylogenetic relationships have proven difficult to resolve through Sanger sequencing. Methods We analysed with restriction site-associated sequencing (RAD-seq) 108 plants representing 29 named taxa that together span the genus, focusing on section Epipactis. Our filtered matrix of 12 543 single nucleotide polymorphisms was used to generate an unrooted network and a rooted, well-supported likelihood tree. We further inferred genetic structure through a co-ancestry heat map and admixture analysis, and estimated inbreeding coefficients per sample. Key Results The 27 named taxa of the ingroup were resolved as 11 genuine, geographically widespread species: four dominantly allogamous and seven dominantly autogamous. A single comparatively allogamous species, E. helleborine, is the direct ancestor of most of the remaining species, though one of the derived autogams has generated one further autogamous species. An assessment of shared ancestry suggested only sporadic hybridization between the re-circumscribed species. Taxa with the greatest inclination towards autogamy show less, if any, admixture, whereas the gene pools of more allogamous species contain a mixture alleles found in the autogams. Conclusions This clade is presently undergoing an evolutionary radiation driven by a wide spectrum of genotypic, phenotypic and environmental factors. Epipactis helleborine has also frequently generated many local variants showing inclinations toward autogamy (and occasionally cleistogamy), best viewed as incipient speciation from within the genetic background provided by E. helleborine, which thus becomes an example of a convincingly paraphyletic species. Autogams are often as widespread and ecologically successful as allogams.
Tárgyszavak:Természettudományok Biológiai tudományok idegen nyelvű folyóiratközlemény külföldi lapban
folyóiratcikk
Admixture
autogamy
evolutionary dead-end
evolutionary radiation
phylogeography
paraphyly
phylogenomics
RAD-seq
speciation
Megjelenés:Annals Of Botany. - 124 : 3 (2019), p. 481-497. -
További szerzők:Paun, Ovidiu Brandrud, Marie K. Laczkó Levente (1992-) (biológus) Molnár V. Attila (1969-) (biológus, botanikus) Bateman, Richard M.
Pályázati támogatás:OTKA PD109686
OTKA
Internet cím:Szerző által megadott URL
DOI
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