Effect of Iron Excess on Growth of Sisal Plants (<Emphasis Type="Italic">Furcraea hexapetala</Emphasis>) |
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| Authors: | F Casierra-Posada J D Cortés-Bayona J Cutler |
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| Institution: | 1.Faculty of Agricultural Sciences, Research Group in Plant Ecophysiology,Pedagogical and Technological University of Colombia (UPTC),Tunja,Colombia;2.Phytomedicine Division, Faculty of Life Sciences, Albrecht Daniel Thaer Institute for Agricultural and Horticultural Sciences,Humboldt Universt?t zu Berlin,Berlin,Germany |
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| Abstract: | In order to evaluate the effect of excess iron on the growth of sisal (Furcraea hexapetala) plants, an experiment was carried out in Tunja, Colombia, under greenhouse conditions. The plants were grown in a substrate in which 100, 150, 200 and 300?ppm of Fe were added. Control plants were provided without the addition of iron. The Chlorophyll Content Index, dry matter, and root to shoot ratio were gradually reduced as the Fe content in the substrate increased. Leaf area, relative growth rate, absolute growth rate, leaf area ratio and specific leaf area were significantly reduced with the higher doses of Fe. In addition, dry matter partitioning was altered in relation to the control plants and a lower allocation of dry matter in the roots of plants exposed to the higher Fe content was observed. Sisal plants are moderately tolerant to the excess Fe, however when exposed to 300?ppm of the metal, growth is drastically reduced. |
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