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Absorçao de zinco por tecido foliar de cafeeiro (Coffea arabica L.)

by Blanco, H.G; Haag, H.P; Oliveira, D. de A; Sarruge, J.R.
Publisher: Ene-Mar 1972Subject(s): COFFEA ARABICA | RADIOISOTOPOS | FISIOLOGIA | ZINC | ANALISIS DE TEJIDOS | ABSORCION FOLIAR | EFECTOS DE LA TEMPERATURA | EFECTOS DE LA LUZ | BOURBON | COFFEA ARABICA | RADIOISOTOPES | TISSUE ANALYSIS | COFFEA ARABICA | ISOTOPE RADIOACTIF | ANALYSE DE TISSUS In: Arquivos do Instituto Biológico (Brasil) v. 39(1) p. 1-12Summary: Researches were conducted in order to demonstrate that zinc absorption is an active process. Studies on absorption of zinc labeled with 65Zn, were carried out with leaves slices in regard to the time course of uptake, temperature, light, oxigen, pH of external solution, 2.4 DNP, sucrose, urea, boron, copper and mercury. The concluding comments are: the absorption of zinc is an actif process. Sucrose and urea depresse the absorption of zinc. Copper, boron and mercury competetively interfer with transport zinc into the "inner" space
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++Dat. num. 27 ref. Sum. (En, Pt)

Researches were conducted in order to demonstrate that zinc absorption is an active process. Studies on absorption of zinc labeled with 65Zn, were carried out with leaves slices in regard to the time course of uptake, temperature, light, oxigen, pH of external solution, 2.4 DNP, sucrose, urea, boron, copper and mercury. The concluding comments are: the absorption of zinc is an actif process. Sucrose and urea depresse the absorption of zinc. Copper, boron and mercury competetively interfer with transport zinc into the "inner" space

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