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001-es BibID:	BIBFORM065711
035-os BibID:	(Scopus)84990957258 (WOS)000386937000005
Első szerző:	Solti Ádám
Cím:	Stress hardening under long-term cadmium treatment is correlated with the activation of antioxidative defence and iron acquisition of chloroplasts in Populus / Ádám Solti, Éva Sárvári, Erzsébet Szöllősi, Brigitta Tóth, Ilona Mészáros, Ferenc Fodor, Zoltán Szigeti
Dátum:	2016
ISSN:	0939-5075
Megjegyzések:	Cadmium (Cd), a highly toxic heavy metal affects growth and metabolic pathways in plants, including photosynthesis. Though Cd is a transition metal with no redox capacity, it generates reactive oxygen species (ROS) indirectly and causes oxidative stress. Nevertheless, the mechanisms involved in long-term Cd tolerance of poplar, candidate for Cd phytoremediation, are not well known. Hydroponically cultured poplar (Populus jacquemontiana var. glauca cv. 'Kopeczkii') plants were treated with 10 ?M Cd for 4 weeks. Following a period of functional decline, the plants performed acclimation to the Cd induced oxidative stress as indicated by the decreased leaf malondialdehyde (MDA) content and the recovery of most photosynthetic parameters. The increased activity of peroxidases (PODs) could have a great impact on the elimination of hydrogen peroxide, and thus the recovery of photosynthesis, while the function of superoxide dismutase (SOD) isoforms seemed to be less important. Re-distribution of the iron content of leaf mesophyll cells into the chloroplasts contributed to the biosynthesis of the photosynthetic apparatus and some antioxidative enzymes. The delayed increase in photosynthetic activity in relation to the decline in the level of lipid peroxidation indicates that elimination of oxidative stress damage by acclimation mechanisms is required for the restoration of the photosynthetic apparatus during long-term Cd treatment.
Tárgyszavak:	Agrártudományok Növénytermesztési és kertészeti tudományok idegen nyelvű folyóiratközlemény külföldi lapban folyóiratcikk Cadmium oxidative stress populus Photosynthesis
Megjelenés:	Zeitschrift Fur Naturforschung Section C-A Journal Of Biosciences. - 71 : 9-10 (2016), p. 323-334. -
További szerzők:	Sárvári Éva Szőllősi Erzsébet (1983-) (biológus) Tóth Brigitta (1984-) (környezetgazdálkodási agrármérnök) Mészáros Ilona (1952-) (biológus) Fodor Ferenc Szigeti Zoltán
Internet cím:	Szerző által megadott URL DOI Intézményi repozitóriumban (DEA) tárolt változat
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001-es BibID:	BIBFORM030978
Első szerző:	Solti Ádám
Cím:	F690-F740 is more suitable than F690/F740 for mapping the regeneration of Cd-induced chlorosis in poplar leaves by fluorescence imaging / Ádám Solti, László Gáspár, Zoltán Szigeti, Ilona Mészáros, Éva Sárvári
Dátum:	2008
Tárgyszavak:	Természettudományok Biológiai tudományok idegen nyelvű folyóiratközlemény hazai lapban
Megjelenés:	Acta Biologica Szegediensis. - 52 : 1 (2008), p. 191-194. -
További szerzők:	Gáspár László Szigeti Zoltán Mészáros Ilona (1952-) (biológus) Sárvári Éva
Internet cím:	Intézményi repozitóriumban (DEA) tárolt változat
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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)
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