Modulation of Copper Uptake and Toxicity by Abiotic Stresses in Matricaria chamomilla Plants

0382220 - ÚEB 2013 RIV US eng J - Journal Article
Kováčik, J. - Klejdus, B. - Hedbavny, J. - Štork, F. - Grúz, Jiří
Modulation of Copper Uptake and Toxicity by Abiotic Stresses in Matricaria chamomilla Plants.
Journal of Agricultural and Food Chemistry. Roč. 60, č. 27 (2012), s. 6755-6763. ISSN 0021-8561. E-ISSN 1520-5118
R&D Projects: GA AV ČR KAN200380801
Grant - others:GA MŠk(CZ) ED1.1.00/02.0068; GA ČR(CZ) GA525/07/0338; GA ČR(CZ) GPP503/12/P166; GA MŠk(CZ) ED0007/01/01
Program: ED; GA; GP; ED
Institutional research plan: CEZ:AV0Z50380511
Keywords : chlorogenic acid * heavy metals * NaCl
Subject RIV: EC - Immunology
Impact factor: 2.906, year: 2012

The impact of salinity (S) or nitrogen deficiency (-N) on copper (Cu) uptake and changes to metabolism were studied in the combined treatments after 7 days of exposure. S suppressed growth, water content, soluble proteins, and reducing sugars more negatively than -N. ROS (hydrogen peroxide and superoxide) were differentially but relatively slightly affected while peroxidase activities were strongly elevated mainly in Cu+NaCl variant. Total soluble phenols and individual phenolic acids (free and cell wall-bound fraction) were accumulated the most in Cu-N while, among free amino acids, proline sharply increased in Cu+NaCl; this suggests a compensatory mechanism between the syntheses of antioxidants aimed to maintain antioxidative protection because numerous root phenolic acids were even depressed by S. Salinity also suppressed accumulation of coumarin herniarin, but its glucosidic precursors ((Z)- and (E)-2-beta-D-glucopyranosyloxy-4-methoxycinnamic acids) increased. Activities of selected phenolic enzymes were rather suppressed by S after a given exposure period while lignin content increased, suggesting different time dynamics if S and -N variants are compared. Selected mineral nutrients (K, Fe, and partially Mg) were more reduced by S than by -N. Shoot and root Cu amounts were depressed by -N but elevated by S. Significance and possible role of observed metabolic changes in relation to Cu accumulation are discussed.
Permanent Link: http://hdl.handle.net/11104/0212508