The effect of high iron doses (fe2+) on the growth of broccoli plants (brassica oleracea var. italica)

Tests were carried out under greenhouse conditions in Tunja (Colombia) in order to evaluate the effect of Fe2+ toxicity on the growth of broccoli plants. ‘Legacy’ hybrid Brassica oleracea var. Italica plantlets were grown in glass containers with a nutritive solution. Iron sulfate was added to the substrate in order to produce excess iron at concentrations of 100 and 200 mg L-1; a control without iron sulfate applications was used. The following evaluations were made: leaf area, total dry weight of the plants, distribution of dry mass (DM) in the different organs, absolute growth rate, relative growth rate, net assimilation rate and the root:shoot ratio. The total DM decreased drastically in the plants subjected to excess Fe2+, the growth indices progressively decreased with increases in the Fe2+ concentrations in the substrate and the distribution of DM in the organs varied as a function of the needs of the plants, with 15.85 and 11.10% less DM in the roots of the plants subjected to Fe2+ than in the control plants, at 100 and 250 mg L-1, respectively.

• Autores: Peña-Olmos, Jaime E.; Casierra Posada, Fánor; Olmos-Cubides, Misael A.
• Tipo de recurso: Article of journal
• Fecha de publicación: 2014
• Institución: Universidad Nacional de Colombia
• Repositorio: Universidad Nacional de Colombia
• Idioma: spa
• OAI Identifier: oai:repositorio.unal.edu.co:unal/74305
• Acceso en línea: https://repositorio.unal.edu.co/handle/unal/74305; http://bdigital.unal.edu.co/38782/
• Palabra clave: Agronomia; Fisiologia vegal; plant nutrition; dry mass partitioning; iron sulfate; toxicity to plants.
• Rights: openAccess
• License: Atribución-NoComercial 4.0 Internacional