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Effects of Ammonium and Potassium Ions on Some Physiological and Biochemical Processes of Excised Cucumber Cotyledons
Author(s) -
PATNAIK RABINDRANATH,
BARKER ALLEN V.,
MAYNARD DONALD N.
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.tb01132.x
Subject(s) - cucumis , incubation , ammonium , potassium , chemistry , leucine , desiccation , greening , absorption (acoustics) , horticulture , biochemistry , botany , nuclear chemistry , biology , amino acid , organic chemistry , ecology , physics , acoustics
Incubation of excised cucumber cotyledons ( Cucumis sativus L.) with NH 4 Cl solutions exceeding 0.001 M inhibited their greening, fresh weight increases, and incorporation of 14 C‐leucine into insoluble N compounds. The absorption of 14 C‐leucine during incubation and retention of moisture by the excised cotyledons after incubation were greatly diminished by the NH 4 Cl treatments. Treatment with KCl solutions of the same concentrations as the NH 4 Cl stimulated the greening, fresh weight increases, and the absorption and incorporation of 14 C‐leucine. Desiccation of cotyledons stored at 5°C for 10 days was inhibited by dilute KCl solutions. The toxicity of NH 4 Cl was alleviated by KCl solutions at low concentrations.