AMBIENTUM BIOETHICA BIOLOGIA CHEMIA DIGITALIA DRAMATICA EDUCATIO ARTIS GYMNAST. ENGINEERING EPHEMERIDES EUROPAEA GEOGRAPHIA GEOLOGIA HISTORIA HISTORIA ARTIUM INFORMATICA IURISPRUDENTIA MATHEMATICA MUSICA NEGOTIA OECONOMICA PHILOLOGIA PHILOSOPHIA PHYSICA POLITICA PSYCHOLOGIA-PAEDAGOGIA SOCIOLOGIA THEOLOGIA CATHOLICA THEOLOGIA CATHOLICA LATIN THEOLOGIA GR.-CATH. VARAD THEOLOGIA ORTHODOXA THEOLOGIA REF. TRANSYLVAN
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Rezumat articol ediţie STUDIA UNIVERSITATIS BABEÅž-BOLYAI În partea de jos este prezentat rezumatul articolului selectat. Pentru revenire la cuprinsul ediţiei din care face parte acest articol, se accesează linkul din titlu. Pentru vizualizarea tuturor articolelor din arhivă la care este autor/coautor unul din autorii de mai jos, se accesează linkul din numele autorului. |
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STUDIA BIOLOGIA - Ediţia nr.1 din 2005 | |||||||
Articol: |
INFLUENŢA MICROELEMENTELOR CUPRU ŞI ZINC ASUPRA DINAMICII FOSFORULUI ÎN FRUNZELE DE CĂPŞUN (FRAGARIA ANANASSA D.). Autori: LAURA GROZA, CRISTINA DOBROTÄ‚. |
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Rezumat: The Influence of Copper and Zinc on the Dynamic of Phosphorus in Strawberry (Fragaria ananassa D.) Leaves. Despite the wide range of copper and zinc concentrations in agricultural soils, and the potentially-toxic effects on plants of high concentrations of these elements, relatively few studies have examined their impact on other mineral nutrients. In this study, we examined the effects of copper and zinc supply on the dynamic of phosphorus in plant leaves. Strawberry plants (Redgauntlet cultivar) were grown in a 1:1:1 (v/v/v) soil:sand:silt mixture watered to saturation every other day and fertilized with a mineral solution containing N 15%, P 15%, and K 15%. Foliar applications of copper and zinc concentrations ranging from no added to concentration 5•10-2% (expected to be toxic) were tested. In all treatments, copper supply significantly enhance the phosphorus concentration in plant leaves, but not the zinc supply. However, phosphorus concentration progressively decreased over time in all Cu or Zn treatments, remaining anyway higher than the control. These results suggest a progressing phosphorus deficiency in plants that received little or no supplemental copper. These results are consistent with results from studies on a range of agricultural plants, which suggest that Cu is required in low concentrations by plants for normal functioning and becomes toxic at higher concentrations. | |||||||