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Influence of Nitrogen Supply on Uptake and Translocation of Strontium and Calcium in Wheat Seedlings
Author(s) -
ANDERSEN A. J.,
JACKSON W. A.
Publication year - 1972
Publication title -
physiologia plantarum
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.351
H-Index - 146
eISSN - 1399-3054
pISSN - 0031-9317
DOI - 10.1111/j.1399-3054.1972.tb03563.x
Subject(s) - strontium , chromosomal translocation , calcium , nitrogen , strontium 90 , chemistry , agronomy , biology , biochemistry , radionuclide , physics , organic chemistry , gene , quantum mechanics
Supplying nitrate to N‐depleted wheat seedlings ( Triticum vulgare cv. Knox) stimulated the uptake and translocation of both 83 Sr and 45 Ca. Since the increase in 45 Ca accumulation was greater, the 85 Sr/ 45 Ca ratio in the plant tissue was decreased. Nitrate had relatively little influence on the amount of the divalent cations and 85 Sr/ 45 Ca ratio in the exchangeable fraction on the root surfaces, whereas it greatly increased the uptake into root tissue and translocation to shoots. The increase in percent transported to shoots occurred largely in the period of most rapid nitrate uptake. A split root study indicated that nitrate was ineffective when it was supplied to a different portion of the root system than that exposed to 85 Sr and 45 Ca. Nevertheless, ammonium and urea also increased the translocation of the two cations, indicating that the effects of nitrate could not entirely be ascribed to a direct effect of the nitrate anion.