Submitted to: ASA-CSSA-SSSA Annual Meeting Abstracts
Publication Type: Abstract Only
Publication Acceptance Date: November 6, 2003
Publication Date: November 6, 2003
Citation: OLNESS, A.E., GESCH, R.W., FORCELLA, F., ARCHER, D.W., RINKE, J.L. EFFECT OF VANADIUM AND NUTRIENT IONIC RATIOS ON GROWTH AND DEVELOPMENT OF CUPHEA. CD-ROM. MADISON, WI: ASA-CSSA-SSSA. 2003. Technical Abstract: Little is known regarding the optimal mineral nutritional requirements of cuphea (Cuphea viscossisima x C. lanceolata 'PSR 23'). Oilseed crops such as cuphea often need additional phosphorus (P) to achieve optimal economic yield. Vanadium (V), a commonly occurring soil constituent, interferes with plant P uptake. Hydroponic culture was used to evaluate the relative effect of V on growth and development of cuphea. Relative root length, root surface area, root weight, and aerial dry weights decreased exponentially as the V concentration increased from 0 to 153 uM. In contrast to field observations of other crops, increasing the Mg:(Mg + Ca) ratio further decreased plant growth by as much 50% at V concentrations greater than 31 uM. Root length decreased by about 50% of the control when grown in 153 uM V and relative root area and dry weight decreased by > 75%. Increases in V concentration sharply reduced lateral branching in roots. Reduction in root growth was accompanied by a chlorotic appearance. Results suggest that readily available V in field situations will result in poor root growth and crop performance of cuphea. Also, interaction of V and MgSO4 will lead to further reductions in yields in the field.