Premium
INFLUENCE OF N‐(TRICHLOROMETHYLTHIO)‐4‐CYCLOHEXENE‐1,2‐DICARBOXIMIDE (CAPTAN) ON HIGHER PLANTS. II. EFFECT ON SPECIFIC ENZYME SYSTEMS
Author(s) -
Dugger W. M.,
Humphreys T. E.,
Calhoun Barbara
Publication year - 1959
Publication title -
american journal of botany
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.218
H-Index - 151
eISSN - 1537-2197
pISSN - 0002-9122
DOI - 10.1002/j.1537-2197.1959.tb06997.x
Subject(s) - captan , biology , fungicide , enzyme , phthalimide , biochemistry , hexokinase , yeast , botany , glycolysis
D ugger , W. M., J r ., T. E. H umphreys , and B arbara C alhoun . (Florida Agric. Expt. Sta., Gainesville.) Influence of N‐(trichloromethylthio) ‐4‐cyclohexene‐1,2‐dicarboximide (captan) on higher plants. II. Effect on specific enzyme systems. Amer. Jour. Bot. 46(3) : 151‐156. Illus. 1959.—The effect of N‐(trichloromethylthio)‐4‐cyclohexene‐1,2‐dicarbomixide (captan) and 2 analogs on specific enzyme systems associated with plant metabolism has been studied. The fungicide inhibits yeast hexokinase, but not hexokinase from wheat germ or pea seedlings. Decarboxylation of pyruvate and α‐ketoglutarate by lupine mitochondria was inhibited by captan and the phthalimide and hexahydrophthalimide analogs. This inhibition was reversible, at low levels of the fungicides, by adding cocarboxylase. The oxidation of ribose‐5‐phosphate by pea extract was also inhibited by captan and the hexadehydro analog, but cocarboxylase did not reduce the inhibition. TPN reduction was not affected.