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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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