Effects on Zea mays Seedlings of a Strontium Replacement for Calcium in Nutrient Media

When Sr replaced Ca in the nutrient medium, maize seedlings remain alive when seedlings in a Na-replacement for Ca died. In Sr, elongation of roots and shoots was inhibited; however, development of secondary root priraordia was stimulated, and differentiated xylem elements appeared near the root api...

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Bibliographic Details
Published in:Plant physiology (Bethesda) 1963-07, Vol.38 (4), p.410-413
Main Authors: Queen, William H., Harvey W. Fleming, O'Kelley, Joseph C.
Format: Article
Language:English
Subjects:
BIOLOGY AND MEDICINE
CALCIUM
CEREALS
Corn
DISTRIBUTION
MAIZE
METABOLISM
Nutrient solutions
Plant roots
Plants
Radioactive decay
Root systems
Root tips
ROOTS
Seedlings
SEEDS
SODIUM
SOLUTIONS
STRONTIUM
TISSUES
TOXICITY
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Summary:When Sr replaced Ca in the nutrient medium, maize seedlings remain alive when seedlings in a Na-replacement for Ca died. In Sr, elongation of roots and shoots was inhibited; however, development of secondary root priraordia was stimulated, and differentiated xylem elements appeared near the root apical meristem. In the absence of external Ca in the nutrient medium, Sr, as compared to Na, did not appear to slow down the rate of loss of Ca from seedling roots, nor did it appear to allow for redistribution of Ca from older parts of the root to the root tip. It is concluded that Sr can replace part of the Ca ordinarily required by these seedlings. (auth)
ISSN:0032-0889
1532-2548
DOI:10.1104/pp.38.4.410