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Cadmium stimulates the accumulation of salicylic acid and its putative precursors in maize ( Zea mays ) plants
Author(s) -
Pál Magda,
Horváth Eszter,
Janda Tibor,
Páldi Emil,
Szalai Gabriella
Publication year - 2005
Publication title -
physiologia plantarum
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.351
H-Index - 146
eISSN - 1399-3054
pISSN - 0031-9317
DOI - 10.1111/j.1399-3054.2005.00545.x
Subject(s) - salicylic acid , cadmium , chemistry , malondialdehyde , peroxidase , cinnamic acid , glutathione reductase , antioxidant , chlorophyll , guaiacol , food science , phenylalanine , biochemistry , glutathione , enzyme , glutathione peroxidase , amino acid , organic chemistry
The effect of 10, 25 and 50 µ M Cd(NO 3 ) 2 on the salicylic acid (SA) metabolism was investigated in young maize seedlings ( Zea mays L., hybrid Norma). Cadmium (Cd) was translocated into the leaves and induced oxidative damage, as indicated by the reduced chlorophyll content, the decreased quantum efficiency of photosystem II and the enhanced malondialdehyde (MDA) content, especially after 7 days. The activity of glutathione reductase (EC 1.6.4.2) increased from the fourth day and that of guaiacol peroxidase (EC 1.11.1.7) after 7 days of Cd stress compared with the control leaves. These effects of Cd exhibited a correlation with the concentration. Under these conditions, Cd did not affect the MDA content or the antioxidant enzyme activities in the roots. After 7 days, Cd increased the levels of free and bound forms of benzoic acid (BA), O ‐coumaric acid ( O ‐hydroxy‐cinnamic) ( O‐ HCA) and SA in the leaves, but in the roots, only the 50 µ M rate of Cd caused changes in the free O ‐HCA acid and bound BA content.