Találati lista | Tudóstér

001-es BibID:	BIBFORM118729
035-os BibID:	(WoS)001196813800001 (Scopus)85185442437
Első szerző:	Oláh Viktor (biológus)
Cím:	Frond-level analyses reveal functional heterogeneity within heavy metal-treated duckweed colonies / Viktor Oláh, Kamilla Kosztankó, Muhammad Irfan, Zsuzsanna Barnáné Szabó, Marcel A. K Jansen, Sándor Szabó, Ilona Mészáros
Dátum:	2024
ISSN:	2667-064X
Megjegyzések:	Duckweeds (Lemnaceae) rapidly produce clonal populations that make them ideal models in plant physiological and ecotoxicological research. Yet, despite their genetic homogeneity, duckweed colonies are clusters of successively produced fronds with different ontogenetic states, and this heterogeneity has rarely been studied. We analyzed frond-level photosynthetic responses of three duckweed species (Spirodela polyrhiza, Landoltia punctata and Lemna minor) to hexavalent chromium and nickel by means of chlorophyll fluorescence imaging. Our aim was to test whether fronds, or frond zones in their different developmental stages respond differently to heavy metal stress. Different response patterns were found for the three tested species. Young fronds of S. polyrhiza were more sensitive to chromate but less affected by nickel compared to mature ones, while in La. punctata the opposite was found. In Le. minor cultures, young fronds were more sensitive to both heavy metals compared to mature ones. Within-frond patterns indicated that chromate inhibited the marginal frond regions strongest. In La. punctata and Le. minor, nickel was most detrimental in the developing frond regions. In contrast, in S. polyrhiza the middle zone of both young and mature fronds was affected strongest by nickel. The observed patterns suggest that internal redistribution of toxicants plays a key role in shaping duckweed responses. Results highlight that ontogenetically different parts of duckweed plants respond differently to environmental stimuli. Since duckweed-based impact studies and economical applications rely strongly on the interactions between the duckweed colony and its environment, frond-, and within-frond level analysis of duckweed responses comprise a unique tool to reveal uptake, re-distribution and mode of action of environmentally relevant substances.
Tárgyszavak:	Természettudományok Biológiai tudományok idegen nyelvű folyóiratközlemény külföldi lapban folyóiratcikk békalencse frond ontogenezis klorofill fluoreszcencia leképezés nehézfém stressz
Megjelenés:	Plant Stress. - 11 (2024), p. 1-11. -
További szerzők:	Kosztankó Kamilla Irfan, Muhammad (1995-) (PhD Environmental Sciences) Barnáné Szabó Zsuzsanna (2000-) Jansen, Marcel A. K. Szabó Sándor (1956-) (zoológus) Mészáros Ilona (1952-) (biológus)
Pályázati támogatás:	FK 134296 OTKA ÚNKP-23-5 Egyéb
Internet cím:	Szerző által megadott URL DOI Intézményi repozitóriumban (DEA) tárolt változat
Borító:
Saját polcon:

001-es BibID:	BIBFORM107750
035-os BibID:	(WOS)000909169600001 (Scopus)85145834280
Első szerző:	Oláh Viktor (biológus)
Cím:	Species- and Metal-Specific Responses of the Ionome of Three Duckweed Species under Chromate and Nickel Treatments / Viktor Oláh, Muhammad Irfan, Zsuzsanna Barnáné Szabó, Zsófi Sajtos, Ágota Zsófia Ragyák, Boglárka Döncző, Marcel A. K. Jansen, Sándor Szabó, Ilona Mészáros
Dátum:	2023
ISSN:	2223-7747
Megjegyzések:	In this study, growth and ionomic responses of three duckweed species were analyzed, namely Lemna minor, Landoltia punctata, and Spirodela polyrhiza, were exposed for short-term periods to hexavalent chromium or nickel under laboratory conditions. It was found that different duckweed species had distinct ionomic patterns that can change considerably due to metal treatments. The results also show that, because of the stress-induced increase in leaf mass-to-area ratio, the studied species showed different order of metal uptake efficiency if plant area was used as unit of reference instead of the traditional dry weight-based approach. Furthermore, this study revealed that mu XRF is applicable in mapping elemental distributions in duckweed fronds. By using this method, we found that within-frond and within-colony compartmentation of metallic ions were strongly metal- and in part species-specific. Analysis of duckweed ionomics is a valuable approach in exploring factors that affect bioaccumulation of trace pollutants by these plants. Apart from remediating industrial effluents, this aspect will gain relevance in food and feed safety when duckweed biomass is produced for nutritional purposes.
Tárgyszavak:	Természettudományok Biológiai tudományok idegen nyelvű folyóiratközlemény külföldi lapban folyóiratcikk
Megjelenés:	Plants-Basel. - 12 : 1 (2023), p. 1-16. -
További szerzők:	Irfan, Muhammad (1995-) (PhD Environmental Sciences) Barnáné Szabó Zsuzsanna (2000-) Sajtos Zsófi (1994-) (kémikus, okleveles analitikus vegyész) Dienes Ágota Zsófia (1997-) (vegyészmérnök) Döncző Boglárka (1987-) (biológiatanár-földrajztanár) Jansen, Marcel A. K. Szabó Sándor Mészáros Ilona (1952-) (biológus)
Pályázati támogatás:	FK 134296 OTKA 2.3.3-15-2016-00029 GINOP
Internet cím:	Szerző által megadott URL DOI Intézményi repozitóriumban (DEA) tárolt változat
Borító:
Saját polcon:

001-es BibID:	BIBFORM132352
Első szerző:	Xuan, Pham Thi Hong
Cím:	Lemna gibba Clones Show Differences in Phenotypic Responses to the Light Environment / Pham Thi Hong Xuan, Raja Amri, Nguyen Phuong Bach, Muhammad Irfan, Manuela Bog, Klaus J. Appenroth, K. Sowjanya Sree, Marcel A. K. Jansen, Sándor Szabó, Ilona Mészáros, Viktor Oláh
Dátum:	2025
ISSN:	2223-7747
Megjegyzések:	Duckweeds are aquatic plants with a worldwide distribution that can thrive under very contrasting ambient conditions due to their diversity and high phenotypic plasticity. In this study, we analyzed and compared the responses of four clones (i.e., distinct accessions) of Lemna gibba to two different light intensities. The clones represented different geographical origins and, in addition to two diploid cytotypes, included one tetraploid mutant and a triploid interspecific hybrid. We hypothesized that clonal origin had an effect on light acclimation. We studied growth, morphological (frond size and shape, mass-to-area ratio), and photosynthetic (pigment composition, chlorophyll fluorescence induction) traits of these clones to test whether light acclimation was a conserved process or whether clonespecific strategies could be found. We also analyzed frond-level photosynthetic adjustment during ontogenesis to track how light acclimation evolved in developing fronds. Our results confirmed that even clones of the same duckweed species and a hybrid of closely related species followed partially different strategies in acclimation to ambient conditions. This acclimation involved various morphological, physiological, and biochemical adjustments but happened in a very short time window at the early life stage when young, still-developing fronds could flexibly achieve an optimized phenotype. In addition to explaining the worldwide success of duckweeds in colonizing very contrasting habitats, our results also highlight the importance of approaching duckweed responses at the frond level, where the actual acclimation takes place.
Tárgyszavak:	Természettudományok Biológiai tudományok idegen nyelvű folyóiratközlemény külföldi lapban folyóiratcikk duckweed frond light acclimation biodiversity photosynthesis photosynthetic pigments chlorophyll fluorescence
Megjelenés:	Plants-Basel. - 14 : 18 (2025), p. 1-22. -
További szerzők:	Amri, Raja Bach, Nguyen Phuong Irfan, Muhammad (1995-) (PhD Environmental Sciences) Bog, Manuela Appenroth, Klaus-Juergen Sree, K. Sowjanya Jansen, Marcel A. K. Szabó Sándor (1956-) (zoológus) Mészáros Ilona (1952-) (biológus) Oláh Viktor (1980-) (biológus)
Pályázati támogatás:	134296 OTKA
Internet cím:	Szerző által megadott URL DOI Intézményi repozitóriumban (DEA) tárolt változat
Borító:
Saját polcon: