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Annals of Botany 80: 553-559, 1997
© 1997 Annals of Botany Company

Differences in Iron Nutrition Strategies of Two Calcifuges,Carex piluliferaL. andVeronica officinalisL.

ANGELIKA ZOHLEN+, and GERMUND TYLER

Department of Ecology, Soil-Plant Research, Ecology Building, Lund University, S-223 62, Lund, Sweden

Received January 6, 1997 ; Accepted July 3, 1997 .

Veronica officinalisandCarex pilulifera, widespread calcifuge plants in Europe, were cultivated in acid and calcareous soils to study differences in Fe aquisition strategies indicated in previous studies. The experiments were performed in a computer-controlled glasshouse at a soil solution moisture content of 50–60% water holding capacity; additional light was supplied at 70 W m-2if ambient light was <100 W m-2between 0600 and 1800h. Both species developed chlorosis when grown in the calcareous soil.C. piluliferaproved unable to translocate sufficient amounts of Fe to the leaves when cultivated in calcareous soil, but much Fe accumulated in, and especially as a precipitate on the surface of roots. In contrast,V. officinalistended to increase Fe taken up into the leaves of plants grown on calcareous soil, but a much greater proportion of the leaf tissue Fe was accumulated as less active forms not extracted by Fe complexing agents, e.g. 1,10-phenanthroline, than was the case in acid-soil grown plants. Considerably less Fe was accumulated in the root biomass ofV. officinaliscompared toC. pilulifera.It is concluded that chlorosis inC. piluliferais related to insufficient Fe uptake in the leaves, whereas leaf immobilization of Fe in physiologically less active forms is the problem inV. officinalis.

Iron; chlorosis; calcifuge; iron immobilization; leaf tissue; fractionation; Carex pilulifera; Veronica officinalis


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A. ZOHLEN and G. TYLER
Soluble Inorganic Tissue Phosphorus and Calcicole-Calcifuge Behaviour of Plants
Ann. Bot., September 1, 2004; 94(3): 427 - 432.
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