Polyamine metabolism in sunflower plants under long-term cadmium or copper stress
| Autor: | Maria Patricia Benavides, M. P. Ianuzzo, María L. Tomaro, María Daniela Groppa |
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| Rok vydání: | 2006 |
| Předmět: |
Chlorophyll
Time Factors Proline Carboxy-Lyases Spermidine Clinical Biochemistry chemistry.chemical_element Spermine Ornithine Decarboxylase Biochemistry chemistry.chemical_compound Animal science Polyamines Putrescine medicine Cadmium Organic Chemistry Copper toxicity Water medicine.disease Sunflower Copper chemistry Metals Shoot Helianthus Amine Oxidase (Copper-Containing) Polyamine |
| Zdroj: | Amino Acids. 32:265-275 |
| ISSN: | 1438-2199 0939-4451 |
| DOI: | 10.1007/s00726-006-0343-9 |
| Popis: | The effect of different doses of cadmium and copper was studied in relation to growth and polyamine (Pas) metabolism in shoots of sunflower plants. Cadmium accumulated to higher levels than copper and shoot length was reduced by 0.5 and 1 mM Cd, but only by 1 mM Cu. At 1 mM of Cd or Cu, Put content increased 270% and 160% with Cd2+ and Cu2+, respectively. Spermidine (Spd) was modified only by 1 mM Cd, while spermine (Spm) declined after seeds germinated, increasing thereafter but only with 1 mM Cd or Cu (273% over the controls for Cd and 230% for Cu at day 16). Both ADC and ODC activities were increased by 1 mM Cd, whereas 1 mM Cu enhanced ADC activity, but reduced ODC activity at every concentration used. The role of Pas as markers of Cd or Cu toxicity is discussed. |
| Databáze: | OpenAIRE |
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