Amelioration of salinity toxicity in South African crop plants with special reference to maize
Bibliography: leaves 87-101. === The effects of ammonium and nitrate nutrition on potassium uptake, photosynthetic gas exchange and growth responses to salinity stress (80 mM) together with the ameliorative roles of three ranges of calcium concentrations (2.5 to 12 mM, 1 to 8 mM and 0.5 to 5 mM) and...
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| Format: | Dissertation |
| Language: | English |
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University of Cape Town
2014
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| Online Access: | http://hdl.handle.net/11427/8402 |
| Summary: | Bibliography: leaves 87-101. === The effects of ammonium and nitrate nutrition on potassium uptake, photosynthetic gas exchange and growth responses to salinity stress (80 mM) together with the ameliorative roles of three ranges of calcium concentrations (2.5 to 12 mM, 1 to 8 mM and 0.5 to 5 mM) and one range of potassium concentrations (0.2 to 5 mM) were investigated in Zea mays L. var PNR 394. The ameliorative roles of two ranges of calcium concentrations (1 to 8 mM and 0.5 to 5 mM) were also investigated in salt-stressed maize grown at high (35 °C) and low (25 °C) temperature conditions in order to establish if the role of calcium in enhancing salt-tolerance in maize could be temperature-dependent. The criteria chosen to monitor salinity stress were (i) dry plant mass, (ii) plant moisture content, (iii) photosynthetic performance and (iv) nitrogen uptake. |
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