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© 1977 Oxford University Press

RESEARCH-ARTICLE

Effects of Organic Acids on the Loss of Ions from Barley Roots

R. B. LEE

Agricultural Research Council, Letcombe Laboratory Wantage, Oxon 0X12 9JT

Treatment of intact barley root systems with salts of certain aliphatic and aromatic carboxylic acids caused the loss of potassium, nitrate, and u.v.-absorbing material into the surrounding solution. The extent of this loss depended on the lipophilic nature of the organic acid used, and on the concentration of its undissociated form. Neutral derivatives of the organic acids, namely amides and esters, were not effective in causing ion loss.


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