HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS		QUICK SEARCH:   [advanced] Author: Keyword(s): Year:  Vol:  Page:

This Article Full Text (PDF) Alert me when this article is cited Alert me if a correction is posted Services Similar articles in this journal Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via Google Scholar Google Scholar Articles by Brown, J. C. Articles by Bell, W. D. Search for Related Content PubMed Articles by Brown, J. C. Articles by Bell, W. D. Agricola Articles by Brown, J. C. Articles by Bell, W. D.

Iron Uptake Dependent upon Genotype of Corn¹

ABSTRACT

Genetic variants are responsible for a differential uptake of Fe by ys₁ and Pa 54 corn (Zea mays). Different degrees of iron stress were developed in the plants by supplying them with increasing amounts of FeHEDTA. Iron stress enhanced Fe uptake more in Pa 54 than in ys₁ corn. Enhanced Fe uptake was also associated with the ability of the plant to lower the pH of the nutrient solution, Pa 54 > ys₁. Uptake of P was accentuated more in ys₁ than Pa 54 by adding CaCO₃, or by adding KCl instead of K₂SO₄ as a source of K to the nutrient solution. Phosphate reduced Fe uptake more in ys₁ than in Pa 54, and increased the incidence of chlorosis in ys₁.

¹ Contribution from the Soil and Water Conservation Research Division, ARS, USDA.

² Research Soil Scientist, Mineral Nutrition Laboratory, Beltsville, Md., and Plant Physiologist, Department of Genetics, University of Minnesota, St. Paul.

Received for publication June 21, 1968. Accepted for publication August 5, 1968.