effects of excess cu on growth and photosynthesis of barley plants. implication with a screening test for cu tolerance
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ID: 258464
2003
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Abstract
Twenty-day-old barley (Hordeum vulgare L. cv. Ribeka) plants grown as sand culture were exposed to Cu treatment (0, 10, 15 and 20 mg Cu kg-1 sand) for ten days. The effects of excess Cu on both growth and photosynthetic performance were studied in order to identify the most sensitive probes implicating a further development of screening test for Cu tolerance within barley genotypes. The results obtained indicated that stomata conductance and photosynthetic electron transport linked to PSII+OEC exhibited the highest sensitivity to excess Cu, followed by plant dry weigh accumulation, leaf area formation, net photosynthetic rate, photosynthetic electron transport linked to PSI and PSII-OEC. It was concluded that leaf gas exchange parameters, plant dry weight accumulation and leaf area formation present an effective plant test system for screening for barley genotypes with higher Cu tolerance.
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vassilev2003journaleffects
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| Authors | ;A VASSILEV;F LIDON;J RAMALHO;M DO CÉU MATOS;M DA GRACA |
| Journal | balkan medical journal |
| Year | 2003 |
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