Effects of ascorbic acid, charcoal, glucose, and salicylic acid in nutrient solutions on vegetative growth and the susceptibility of Phaseolus vulgaristo sodium chloride
2002
Buxton, G., B.: Department of Botany, University of Cape Coast, Cape Coast, Ghana; | Geyer, B., Humboldt University of Berlin, Institute for Horticultural Science, Germany) | Huyskens-Keil, S., Humboldt University of Berlin, Institute for Horticultural Science, Germany)
The effects of ascorbic acid, charcoal, glucose and salicylic acid, each added separately to normal nutrient solution, on the vegetative growth of Phaseolus vulgaris and also their ameliorative role when 75 mM NaCI was added were studied. Application of 20, 40 and 80 mg 1-1 ascorbic acidand 20 mg 1-1 salicylic acid generally induced larger leaf area and higher leaf, stem and root dry weights compared with normal nutrient solution. Glucose at 0.5 g 1.1 increased root dry weight, but at higher concentrations glucose and charcoal inhibited growth. In all the treatments containing NaCI, leaf succulence and foliar injury developed and vegetative growth was drastically reduced. However, 20mg 1-1 ascorbic acid and to a lesser extent, 0.5 g 1-1 glucose, partially ameliorated the NaCI stress by increasing leaf area, stem and total plant dry weights, relative to treatment with NaCI alone. All other treatments either had little ameliorative effect or increased the susceptibility of P.vulgaris to NaCI stress.
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