Uptake and translocation of zinc applied to the leaves of coffee seedlings
The uptake and translocation of zinc in coffee (Coffea arabica) trees were studied. The seedlings were grown in a nutrient solution without zinc for four months, after which zinc sulfate at 0.6 percent (15 ml of solution) was applied to the basal (6 pairs of lower leaves) or apical (6 pairs of upper leaves) portion of the plant, in addition to plagiotropic branches. Plant samples were collected at 12, 24, 48 or 72 h after the application of zinc sulfate solution. The total contents of zinc in stems, roots and leaves were analysed. No translocation of zinc occurred when zinc sulfate was applied to the basal portion. However, when zinc sulfate was applied to the apical portion, zinc transport towards the base was observed, suggesting a basipetal transport (via phloem).
| Main Authors: | , , , |
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| Format: | biblioteca |
| Published: |
2003
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| Subjects: | COFFEA ARABICA, CINC, COMPOSICION QUIMICA, HOJAS, CONTENIDO MINERAL, DISPONIBILIDAD DE NUTRIENTES, TRANSPORTE DE NUTRIENTES, ABSORCION DE SUSTANCIAS NUTRITIVAS, NUTRICION DE LAS PLANTAS, RAICES, PLANTULAS, TALLOS, |
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