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Effect of Nitrogen on Phosphorus Transport Systems in Zea Mays L.
Author(s) -
Thien S. J.,
McFee W. W.
Publication year - 1972
Publication title -
soil science society of america journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.836
H-Index - 168
eISSN - 1435-0661
pISSN - 0361-5995
DOI - 10.2136/sssaj1972.03615995003600040033x
Subject(s) - chromosomal translocation , nitrogen , phosphorus , absorption (acoustics) , zea mays , chemistry , zoology , agronomy , biochemistry , biology , physics , organic chemistry , acoustics , gene
The effect of N preconditioning on P uptake and translocation was studied using 10‐day‐old corn ( Zea mays L.) in solution culture. Nitrogen preconditioned plants had significantly higher P uptake rates and translocation. Plants remained capable of stimulated P absorption and translocation for periods dependent upon the time interval between N pretreatment and P uptake. The degree to which P uptake was stimulated was dependent upon the N level used for preconditioning. A rather low level, 4m M , resulted in maximum increase in P uptake over control plants. Phosphorus transport to the upper part of the plant increased as N levels in the pretreatment increased. Nitrogen preconditioning stimulated P uptake and translocation maximally when P was supplied at 0.1m M . At lower concentrations only uptake was stimulated while at higher levels, only translocation was stimulated. Observations suggest involvement of more than one P uptake mechanism and separate physiological influence of N on uptake and translocation.