Pavlíková D, Pavlík M, Staszková L, Motyka V, Száková J, Tlustoš P, Balík J
ECOTOXICOLOGY AND ENVIROMENTAL SAFETY
70:
223-230,
2008
Klíčová slova:
Cadmium; Chronic stress; Glutamate kinase [E.C.2.7.2.11]; Proline; Spinacia oleracea L.; Spinach; Zinc
Abstrakt:
Changes of glutamate kinase activity (GKA) in plants under cadmium and zinc chronic stress reported here reveal a regulatory role of
this enzyme in plant heavy metal stress adaptation and indicate its potential use as a stress biomarker. Results of the first experimental
series confirmed the toxic effects of cadmium and zinc at tested levels (30, 60, 90 mgCd kg-1 and 250, 500, 750mg Zn kg-1 soil) for
spinach. A significant decrease of GKA in plants grown on contaminated treatments was found. Changes of GKA of plants grown on the
highest contaminated treatments in the second series of experiments showed a similar course as a curve of plant stress response indicating
the process of plant adaptation to chronic stresses—the decline of GKA in period of damage of cell activities, increase of its activity in
period of maximum resistance and its following decrease in period of the plant metabolism depletion.
Fulltext: kontaktujte autory z ÚEB
Autoři z ÚEB: Václav Motyka,
Milan Pavlík
Čeština
English