Effect of Heavy Metals on Photosynthetic Apparatus and Antioxidant Status of Elodea / Maleva M. G.,Nekrasova G. F.,Borisova G. G.,Chukina N. V.,Ushakova O. S. // RUSSIAN JOURNAL OF PLANT PHYSIOLOGY. - 2012. - V. 59, l. 2. - P. 190-197.

ISSN/EISSN:

1021-4437 / 1608-3407

Type:

Article

Abstract:

Elodea plants (Elodea (Egeria) densa Planch.) were incubated in the presence of individual and mixed 1 mu M sulfate salts of Ni, Cd, Cu, Zn, and Mn to study the influence of heavy metals (HM) on shoot growth, structural-and functional parameters of the photosynthetic apparatus, lipid peroxidation, enzymatic activities of the antioxidant defense system (superoxide dismutase and catalase), and the content of non-protein and protein thiols in leaves. The accumulation of HM in leaves decreased in a row: Mn > Cu > Cd > Zn > Ni. The largest reduction in chlorophyll content was caused by Mn and Cu, whereas the strongest reduction in carotenoid content was induced by Cu. The presence of Cu produced the largest decrease in the maximal quantum efficiency of photosystem II (PSII) (F-v/F-m). These changes were paralleled by the shift of the pro-/antioxidant balance towards the dominance of oxidative processes. The presence of Cd elevated the content of chlorophyll and carotenoids without altering the photochemical efficiency of PSII; Cd retarded the shoot growth but had no appreciable effect on leaf mesostructure. The addition of the second metal to the growth medium alleviated in most treatments the detrimental action of individual ions owing to the enhanced activities of SOD and catalase and because of the significant increase in the content of non-protein thiols. It is supposed that the observed antagonism of metal ions is related to their competitive interactions restricting the entry of HM into the cell.

Author keywords:

Elodea (Egeria) densa; heavy metals; oxidative stress; antioxidant enzymes; photosynthetic apparatus; chlorophyll fluorescence; non-protein and protein thiols STRESS; PLANTS; CADMIUM; ACCUMULATION; RESPONSES; L.

DOI:

10.1134/S1021443712020069

Web of Science ID:

ISI:000302814100006

Соавторы в МНС:

Другие поля

Поле	Значение
Month	MAR
Publisher	MAIK NAUKA/INTERPERIODICA/SPRINGER
Address	233 SPRING ST, NEW YORK, NY 10013-1578 USA
Language	English
EISSN	1608-3407
Keywords-Plus	STRESS; PLANTS; CADMIUM; ACCUMULATION; RESPONSES; L.
Research-Areas	Plant Sciences
Web-of-Science-Categories	Plant Sciences
Author-Email	maria.maleva@mail.ru
ORCID-Numbers	Maleva, Maria/0000-0003-1686-6071 Borisova, Galina/0000-0001-6663-9948
Funding-Acknowledgement	Russian Federation {[}02.120.11.881-MK]; Federal program ``Scientific and Scientific-Pedagogical Personnel of the Innovative Russia{''} {[}P1301, P2364]
Funding-Text	This work for supported by the grant of the President of Russian Federation (contract no. 02.120.11.881-MK) and by the Federal program ``Scientific and Scientific-Pedagogical Personnel of the Innovative Russia{''} (2009-2013, state contracts P1301 and P2364).
Number-of-Cited-References	27
Usage-Count-Last-180-days	7
Usage-Count-Since-2013	48
Journal-ISO	Russ. J. Plant Physiol.
Doc-Delivery-Number	926EM