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The Effect of CO 2 ‐Concentration on the Occurrence of a Number of Acids from the Citric Acid Cycle in Tomato Leaves
Author(s) -
MADSEN ERIK
Publication year - 1974
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.1399-3054.1974.tb03718.x
Subject(s) - succinic acid , malic acid , citric acid , fumaric acid , chemistry , food science , biochemistry
Examination of the effect of CO 2 ‐concentration and time of day on the content of malic acid, citric acid, aconitic acid, isocitric acid, succinic acid and fumaric acid in tomato leaves, revealed that the total content of these acids will rise with the CO 2 ‐concentration up to 0.10 vol% CO 2 . In the morning up to 0.22 vol% CO 2 was needed for optimal effect. Samples of leaves picked at 1 a.m. showed the lowest content of these acids. At 9 a.m. the content had increased, and at 4 p.m. the increase was considerable. The content of malic and citric acid constituted 36 and 34% of the total acid content. In the afternoon and the night the aconitic acid represented 14% and in the morning 20% of the total acid content. Isocitric acid, fumaric acid and succinic acid occurred only in relatively small concentrations.