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The functional responses of phosphate-deficient lupin nodules as mediated by phosphoenolpyruvate carboxylase and altered carbon and nitrogen metabolism (Stellenbosch : University of Stellenbosch, 2010-12)ENGLISH ABSTRACT: In soils, the concentration of available phosphate (P) for plants is normally very low (ca. 1 µM in the soil solution), because most of the P combines with iron, aluminium and calcium to form relatively ...
The effects of organophosphate exposure on non target terrestrial and aquatic organisms following different exposure regimes : linking biomarker responses and life-cycle effects (2010-12)ENGLISH ABSTRACT: The use of organophosphate pesticides is still an integral part of commercial farming activities and these substances have been implicated as a major source of environmental contamination in South Africa. ...