The effect of high iron doses (fe2+) on the growth of broccoli plants (brassica oleracea var. italica)
Autores
Peña-Olmos, Jaime E.
Casierra Posada, Fánor
Olmos-Cubides, Misael A.
Director
Tipo de contenido
Artículo de revista
Idioma del documento
EspañolFecha de publicación
2014-03-26
Título de la revista
ISSN de la revista
Título del volumen
Documentos PDF
Resumen
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.