Implications of calcium nutrition on the response of Phaseolus vulgaris L. to salinity |
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Authors: | Pilar Cachorro Antonio Ortiz Antonio Cerdá |
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Institution: | (1) Department of Plant Nutrition, Centro de Edafología y Biología Aplicada del Segura (CSIC), Apdo. 4195, 30080 Murcia, Spain |
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Abstract: | The effect of Ca2+ level in the growth medium on the response of germination and early seedling growth of Phaseolus vulgaris to NaCl salinity was investigated. When NaCl concentration was increased germination and early seedling growth was decreased. The addition of Ca2+ to the media increased both germination percentage and seedling growth. Chloride concentrations were not affected by the level of Ca2+. Potassium and Ca2+ concentrations and transport from roots to shoots were decreased by NaCl, but were restored by increasing Ca2+ in the medium. The opposite was true for Na+. Leakage of NO3
- and H2PO4
- was increased by salinity and reduced by high Ca2+ in the medium. The results are discussed in terms of the beneficial effects of calcium for plant growth under saline conditions. |
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Keywords: | calcium nutrition calcium transport leakage Phaseolus vulgaris salt tolerance |
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