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1.

001-es BibID:BIBFORM116764
035-os BibID:(cikkazonosító)1294771 (WoS)001122459000001 (Scopus)85179311017
Első szerző:Miklós Máté (biológus)
Cím:Environmental bacteria increase population growth of hydra at low temperature / Máté Miklós, Karolina Cseri, Levente Laczkó, Gábor Kardos, Sebastian Fraune, Jácint Tökölyi
Dátum:2023
ISSN:1664-302X
Tárgyszavak:Természettudományok Biológiai tudományok idegen nyelvű folyóiratközlemény külföldi lapban
folyóiratcikk
Megjelenés:Frontiers in Microbiology. - 14 (2023), p. 1-14. -
További szerzők:Cseri Karolina (1985-) (molekuláris biológus) Laczkó Levente (1992-) (biológus) Kardos Gábor (1974-) (szakorvos, klinikai mikrobiológus) Fraune, Sebastian Tökölyi Jácint (1984-) (biológus)
Pályázati támogatás:MTA-DE Lendület
MTA
Élettudományok - Biológiai tudományok
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2.

001-es BibID:BIBFORM105609
035-os BibID:(WoS)000824385400001 (Scopus)85135091844
Első szerző:Miklós Máté (biológus)
Cím:Seasonal variation of genotypes and reproductive plasticity in a facultative clonal freshwater invertebrate animal (Hydra oligactis) living in a temperate lake / Máté Miklós, Levente Laczkó, Gábor Sramkó, Zoltán Barta, Jácint Tökölyi
Dátum:2022
ISSN:2045-7758
Megjegyzések:Facultative sexual organisms combine sexual and asexual reproduction within a single life cycle, often switching between reproductive modes depending on environmental conditions. These organisms frequently inhabit variable seasonal environments, where favorable periods alternate with unfavorable periods, generating temporally varying selection pressures that strongly influence life history decisions and hence population dynamics. Due to the rapidly accelerating changes in our global environment today, understanding the population dynamics and genetic changes in facultative sexual populations inhabiting seasonal environments is critical to assess and prepare for additional challenges that will affect such ecosystems. In this study, we aimed at obtaining insights into the seasonal population dynamics of the facultative sexual freshwater cnidarian Hydra oligactis through a combination of restriction siteassociated sequencing (RAD-Seq) genotyping and the collection of phenotypic data on the reproductive strategy of field-collected hydra strains in a standard laboratory environment. We reliably detected 42 MlGs from the 121 collected hydra strains. Most of MLGs (N =?35, 83.3%) were detected in only one season. Five MLGs (11.9%) were detected in two seasons, one (2.4%) in three seasons and one (2.4%) in all four seasons. We found no significant genetic change during the 2?years in the study population. Clone lines were detected between seasons and even years, suggesting that clonal lineages can persist for a long time in a natural population. We also found that distinct genotypes differ in sexual reproduction frequency, but these differences did not affect whether genotypes reappeared across samplings. Our study provides key insights into the biology of natural hydra populations, while also contributing to understanding the population biology of facultative sexual species inhabiting freshwater ecosystems.
Tárgyszavak:Természettudományok Biológiai tudományok idegen nyelvű folyóiratközlemény külföldi lapban
folyóiratcikk
clonal reproduction
facultative sexuality
phenotypic plasticity
population genomics
RAD-seq
Megjelenés:Ecology and Evolution. - 12 : 7 (2022), p. 1-13. -
További szerzők:Laczkó Levente (1992-) (biológus) Sramkó Gábor (1981-) (biológus) Barta Zoltán (1967-) (biológus, zoológus) Tökölyi Jácint (1984-) (biológus)
Pályázati támogatás:NKFIH-FK 124164
Egyéb
TKP2020-IKA-04
Egyéb
ÚNKP21-4-I
OTKA
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3.

001-es BibID:BIBFORM096013
035-os BibID:(WoS)000613886100001 (Scopus)85100173315
Első szerző:Miklós Máté (biológus)
Cím:Phenotypic plasticity rather than genotype drives reproductive choices in Hydra populations / Máté Miklós, Levente Laczkó, Gábor Sramkó, Flóra Sebestyén, Zoltán Barta, Jácint Tökölyi
Dátum:2021
ISSN:0962-1083
Megjegyzések:Facultative clonality is associated with complex life cycles where sexual and asexual forms can be exposed to contrasting selection pressures. Facultatively clonal animals often have distinct developmental capabilities that depend on reproductive mode (e.g., negligible senescence and exceptional regeneration ability in asexual individuals, which are lacking in sexual individuals). Understanding how these differences in life history strategies evolved is hampered by limited knowledge of the population structure underlying sexual and asexual forms in nature. Here we studied genetic differentiation of coexisting sexual and asexual Hydra oligactis polyps, a freshwater cnidarian where reproductive mode-dependent life history patterns are observed. We collected asexual and sexual polyps from 13 Central European water bodies and used restriction-site associated DNA sequencing to infer population structure. We detected high relatedness among populations and signs that hydras might spread with resting eggs through zoochory. We found no genetic structure with respect to mode of reproduction (asexual vs. sexual). On the other hand, clear evidence was found for phenotypic plasticity in mode of reproduction, as polyps inferred to be clones differed in reproductive mode. Moreover, we detected two cases of apparent sex change (males and females found within the same clonal lineages) in this species with supposedly stable sexes. Our study describes population genetic structure in Hydra for the first time, highlights the role of phenotypic plasticity in generating patterns of life history variation, and contributes to understanding the evolution of reproductive mode-dependent life history variation in coexisting asexual and sexual forms.
Tárgyszavak:Természettudományok Biológiai tudományok idegen nyelvű folyóiratközlemény külföldi lapban
folyóiratcikk
clonal reproduction
eco-evo- devo
phenotypic plasticity
population genomics
RAD-seq
sex change
Megjelenés:Molecular Ecology. - 30 : 5 (2021), p. 1206-1222. -
További szerzők:Laczkó Levente (1992-) (biológus) Sramkó Gábor (1981-) (biológus) Sebestyén Flóra (1993-) (biológus) Barta Zoltán (1967-) (biológus, zoológus) Tökölyi Jácint (1984-) (biológus)
Pályázati támogatás:NKFIH FK 124164
Egyéb
ÚNKP-19- 3
Egyéb
ÚNKP-19- 4
Egyéb
János Bolyai Research Scholarship of the Hungarian Academy of Sciences
Egyéb
Higher Education Institutional Excellence Program of the Ministry of Human Capacities in Hungary, FIK-Lendület Behavioral Ecology Research Group
Egyéb
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4.

001-es BibID:BIBFORM096002
035-os BibID:(WoS)000574813200005 (Scopus)85087742888
Első szerző:Sebestyén Flóra (biológus)
Cím:Age-dependent plasticity in reproductive investment, regeneration capacity and survival in a partially clonal animal (Hydra oligactis) / Flóra Sebestyén, Máté Miklós, Katalin Iván, Jácint Tökölyi
Dátum:2020
ISSN:0021-8790
Megjegyzések:1. Asexual reproduction diversifies life-history priorities and is associated with unusual reproduction and somatic maintenance patterns, such as constant fertility with age, extensive regeneration ability and negligible senescence. While agedependent plasticity in relative allocation to sexual versus asexual reproductive modes is relatively well studied, the modulation of somatic maintenance traits in parallel with age-dependent reproduction is much less well understood in clonal or partially clonal animals. 2. Here, we asked how age-dependent investment into sexual and asexual reproduction co-varies with somatic maintenance such as regeneration in a partially clonal freshwater cnidarian Hydra oligactis, a species with remarkable regeneration abilities and experimentally inducible sex. 3. We induced gametogenesis by lowering temperature at two ages, 1 or 4 weeks after detachment from an asexual parent, in animals of a male and a female clone.Then we measured phenotypically asexual and sexual reproductive traits (budding rate, start day and number of sexual organs) together with head regeneration rate, survival and the cellular background of these traits (number of reproductive and interstitial stem cells) for 2 or 5 months. 4. Younger animals had higher asexual reproduction while individuals in the older group had more intensive gametogenesis and reproductive cell production. In parallel with these age-dependent reproductive differences, somatic maintenance of older individuals was also impacted: head regeneration, survival and interstitial stem cell numbers were reduced compared to younger polyps. Some of the traits investigated showed an ontogenetic effect, suggesting that age-dependent plasticity and a fixed ontogenetic response might both contribute to differences between age groups. 5. We show that in H. oligactis asexual reproduction coupled with higher somatic maintenance is prioritized earlier in life, while sexual reproduction with higher maintenance costs occurs later if sex is induced. These findings confirm generallife-history theory predictions on resource allocation between somatic maintenance and sexual reproduction applying in a partially clonal species. At the same time, our study also highlights the age-dependent integration of these resource allocation decisions with sexual/asexual strategies. Accounting for age-related differences might enhance repeatability of research done with clonal individuals derived from mass cultures.
Tárgyszavak:Természettudományok Biológiai tudományok idegen nyelvű folyóiratközlemény külföldi lapban
folyóiratcikk
eco-evo-devo
partial clonality
phenotypic plasticity
regeneration
resource allocation
senescence
sexual investment
stem cells
Megjelenés:Journal Of Animal Ecology. - 89 : 10 (2020), p. 2246-2257. -
További szerzők:Miklós Máté (1994-) (biológus) Iván Katalin Tökölyi Jácint (1984-) (biológus)
Pályázati támogatás:NKFIH FK 124164
Egyéb
ÚNKP-18- 3
Egyéb
ÚNKP-19-3
Egyéb
ÚNKP-19-4
Egyéb
János Bolyai Research Scholarship of the Hungarian Academy of Sciences
Egyéb
EFOP-3.6.1-16-2016-00022
EFOP
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5.

001-es BibID:BIBFORM105606
035-os BibID:(Scopus)85126743478 (WoS)000772140000001
Első szerző:Taubenheim, Jan
Cím:Population Differences and Host Species Predict Variation in the Diversity of Host-Associated Microbes in Hydra / Jan Taubenheim, Máté Miklós, Jácint Tökölyi, Sebastian Fraune
Dátum:2022
ISSN:1664-302X
Megjegyzések:Most animals co-exist with diverse host-associated microbial organisms that often form complex communities varying between individuals, habitats, species and higher taxonomic levels. Factors driving variation in the diversity of host-associated microbes are complex and still poorly understood. Here, we describe the bacterial composition of field-collected Hydra, a freshwater cnidarian that forms stable associations with microbial species in the laboratory and displays complex interactions with components of the microbiota. We sampled Hydra polyps from 21 Central European water bodies and identified bacterial taxa through 16S rRNA sequencing. We asked whether diversity and taxonomic composition of host-associated bacteria depends on sampling location, habitat type, host species or host reproductive mode (sexual vs. asexual). Bacterial diversity was most strongly explained by sampling location, suggesting that the source environment plays an important role in the assembly of bacterial communities associated with Hydra polyps. We also found significant differences between host species in their bacterial composition that partly mirrored variations observed in lab strains. Furthermore, we detected a minor effect of host reproductive mode on bacterial diversity. Overall, our results suggest that extrinsic (habitat identity) factors predict the diversity of hostassociated bacterial communities more strongly than intrinsic (species identity) factors, however, only a combination of both factors determines microbiota composition in Hydra.
Tárgyszavak:Természettudományok Biológiai tudományok idegen nyelvű folyóiratközlemény külföldi lapban
folyóiratcikk
determinants of microbial community
holobiont assembly
metaorganism
ecology of microbial communities
host-microbe balance/interaction
Megjelenés:Frontiers in Microbiology. - 13 (2022), p. 1-17. -
További szerzők:Miklós Máté (1994-) (biológus) Tökölyi Jácint (1984-) (biológus) Fraune, Sebastian
Pályázati támogatás:ÚNKP-21-4-I
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6.

001-es BibID:BIBFORM099032
035-os BibID:(cikkazonosító)e03713
Első szerző:Tökölyi Jácint (biológus)
Cím:Seasonal variation in sexual readiness in a facultatively sexual freshwater cnidarian with diapausing eggs / Jácint Tökölyi, Réka Gergely, Máté Miklós
Dátum:2021
ISSN:2150-8925
Megjegyzések:Facultative sexuality combines clonal propagation with sexual reproduction within a single life cycle. Clonal propagation enables quick population growth and the occupancy of favorable habitats. Sex, on the contrary, results in the production of offspring that are more likely to survive adverse conditions (such as the resting eggs of many freshwater invertebrates). In seasonal environments, the timing of sex is often triggered by environmental cues signaling the onset of winter (e.g., temperature drop or changes in photoperiod). Organisms switching to sex to produce resting eggs under these conditions face a trade-off: Responding too early to an environmental cue increases the chances of missing out in clonal propagation, while having a delayed response to deteriorating conditions entails the risk of parental mortality before sexual reproduction could be completed. To mitigate these risks, increased sensitivity toward environmental cues with the onset of the winter might be an adaptive strategy. To test this hypothesis, we investigated sexual propensity and time to gonadogenesis in clonal strains derived from spring- and autumn-collected polyps of Hydra oligactis, a facultatively sexual freshwater cnidarian where sex only occurs prior to the onset of winter. We show that autumn-collected individuals and their asexual offspring have a higher propensity for sex and require less time for gonad development compared with strains established from spring-collected individuals that were kept under similar conditions in the laboratory. To see whether the above results can be explained by phenotypic plasticity in sexual readiness, we exposed cold-adapted laboratory strains to different lengths of warm periods. We found that sexual propensity increases with warm exposure. Our results suggest that reciprocal cold and warm periods are required for sex induction in H. oligactis, which would ensure proper timing of sex in this species. Increased sensitivity to environmental deterioration might help maximize fitness in environments that have both a predictable (seasonal) and an unpredictable component.
Tárgyszavak:Természettudományok Biológiai tudományok idegen nyelvű folyóiratközlemény külföldi lapban
folyóiratcikk
clonal reproduction
EcoEvoDevo
germline stem cells
Hydra
predictability
seasonality
sexual development
Megjelenés:Ecosphere. - 12 : 8 (2021), p. 1-12. -
További szerzők:Gergely Réka (1998-) (Biológus) Miklós Máté (1994-) (biológus)
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7.

001-es BibID:BIBFORM079655
Első szerző:Tökölyi Jácint (biológus)
Cím:Life history traits and previous exposure predict resistance to UV irradiation in the freshwater cnidarian / Tökölyi Jácint, Kozma Beatrix, Sebestyén Flóra, Miklós Máté, Barta Zoltán
Dátum:2017
ISSN:1077-8306 1077-8306
Megjegyzések:Abiotic stress is an important source of mortality for cnidarians and is likely to be a major factor shaping their life histories. In freshwater hydra, the ability to withstand exogenous sources of stress varies between species and populations, but little is known about the factors responsible for this variation. Here, we investigated resistance to UV irradiation in Hydra oligactis, a common temperate freshwater cnidarian. We collected polyps from 12 populations and propagated these asexually under standard conditions in the laboratory to obtain 69 laboratory clonal lines with a total of 324 polyps of different age. We measured the size of polyps and recorded their budding rate. In addition, a subset of animals was exposed to hormetic treatment, where experimental animals received a short, sublethal irradiation 2 d before testing their resistance to a higher dose. We investigated how life history traits (age, size, and budding rate), hormetic treatment, and the interaction between life history traits and hormetic treatment relate to the ability of hydra polyps to tolerate high doses of UV irradiation. In multivariate models controlling for the effect of other variables, stress tolerance was positively related to age (lower tolerance in freshly detached buds compared to adult hydra) and size (higher tolerance in polyps with a large body column). Budding rate was negatively associated with stress tolerance. Hormetic treatment increased resistance to UV irradiation, but we found no evidence for an interaction between hormetic response and any of the life history traits, suggesting that the ability to upregulate physiological defense mechanisms after exposure to mild stress does not depend on the life history background of the individuals.
Tárgyszavak:Természettudományok Biológiai tudományok idegen nyelvű folyóiratközlemény külföldi lapban
abiotic stress
Cnidaria
hormesis
resource allocation
somatic maintenance
Megjelenés:Invertebrate Biology. - 136 : 2 (2017), p. 217-227. -
További szerzők:Kozma Beatrix Sebestyén Flóra (1993-) (biológus) Miklós Máté (1994-) (biológus) Barta Zoltán (1967-) (biológus, zoológus)
Pályázati támogatás:NTP-EFO-P-15
Egyéb
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8.

001-es BibID:BIBFORM078527
Első szerző:Tökölyi Jácint (biológus)
Cím:Öregedés és öregedés nélküli életciklus egy édesvízi csalánzónál : párhuzamos életrajzok / Tökölyi Jácint, Sebestyén Flóra, Miklós Máté, Iván Katalin
Dátum:2018
ISSN:0013-6077 1418-1665
Megjegyzések:Abraham Trembley svájci magántanár tanítványaival különleges élőlényt fedezett fel egy kerti patakban 1740 nyarán. A lényről, amely zöld színű volt mint a növények, de mozgásra és helyváltoztatásra volt képes, mint az állatok, elsőre nem tudta eldönteni, hogy növény vagy állat, ezért részletes megfigyeléseket végzett rajta. Része volt vizsgálódásainak az is, hogy kettévágta őket - feltételezte ugyanis, hogy egy növény képes lenne túlélni, ha kettévágják, állat viszont nem. Meglepetésére a lény nemcsak túlélt, de a kettévágott felek néhány nap alatt teljesen újranövesztették elveszett testrészeiket. Trembley elnevezte a lényt hidrának, utalva a görög mitológiai szörnyre, melynek minden levágott feje helyett kettő nő vissza.
Tárgyszavak:Természettudományok Biológiai tudományok magyar nyelvű folyóiratközlemény hazai lapban
Megjelenés:Élet és Tudomány. - 73 : 23 (2018), p. 710-712. -
További szerzők:Sebestyén Flóra (1993-) (biológus) Miklós Máté (1994-) (biológus) Iván Katalin
Pályázati támogatás:ÚNKP-17-4
Egyéb
Fk124164
Egyéb
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9.

001-es BibID:BIBFORM066149
035-os BibID:(Scopus)84952637768 (WoS)000367196900009
Első szerző:Tökölyi Jácint (biológus)
Cím:Effects of food availability on asexual reproduction and stress tolerance along the fast-slow life history continuum in freshwater hydra (Cnidaria: Hydrozoa) / Jácint Tökölyi, Flóra Bradács, Nikolett Hóka, Noémi Kozma, Máté Miklós, Orsolya Mucza, Kinga Lénárt, Zsófia Ősz, Flóra Sebestyén, Zoltán Barta
Dátum:2015
ISSN:0018-8158
Megjegyzések:Life history theory predicts that reproduction and somatic maintenance are negatively related, but the strength of this relationship is expected to depend on food availability. In this study, we investigated asexual reproduction (budding rate) and oxidative stress tolerance as two opposing facets of life history trade-offs in 17 strains of five freshwater hydra species under experimentally simulated low, medium, and high food availability. Stress tolerance was quantified by exposing animals to exogenous H2O2, which mimics reactive oxygen species arising in vivo. The five species differed in life history traits (low budding rate and high stress tolerance in Hydra vulgaris and H. circumcincta and the opposite in H. oligactis and H. viridissima; low budding rate combined with relatively low stress tolerance in H. oxycnida). Stress tolerance and asexual reproduction increased with food, but there were clear interspecific differences in this relationship. Across all strains, stress tolerance and budding rate were significantly negatively related on the low and medium, but not the high food level. These results suggest that resource allocation trade-offs are involved in determining life history traits in hydra; populations/species can be broadly positioned on a fast-slow life history continuum, and response to variation in food varies along this continuum.
Tárgyszavak:Természettudományok Biológiai tudományok idegen nyelvű folyóiratközlemény külföldi lapban
Dietary restriction
Food variability
Hydra
Life history evolution
Resource allocation trade-offs
Megjelenés:Hydrobiologia. - 766 : 1 (2015), p. 121-133. -
További szerzők:Bradács Flóra Hóka Nikolett Kozma Noémi Miklós Máté (1994-) (biológus) Mucza Orsolya Lénárt Kinga (1994-) (biológus) Ősz Zsófia Sebestyén Flóra (1993-) (biológus) Barta Zoltán (1967-) (biológus, zoológus)
Pályázati támogatás:SROP-4.2.2.B-15/1/KONV-2015-0001
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