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Effects of cyanide and cold treatment on sugar catabolism in apple seeds during dormancy removal
Author(s) -
Bogatek Renata,
Lewak Stanislaw
Publication year - 1988
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.1399-3054.1988.tb00618.x
Subject(s) - pentose phosphate pathway , glycolysis , pyruvate kinase , dormancy , cyanide , sugar , catabolism , dehydrogenase , malus , biochemistry , chemistry , biology , metabolism , botany , enzyme , germination , inorganic chemistry
The ratio of glycolysis to the pentose phosphate pathway (PPP, C 6 /C 1 ratio), and the activities of glucose 6‐phosphate dehydrogenase (EC 1.1.1.49) and pyruvate kinase (PK, EC 2.7,1.40) were determined in apple seeds ( Malus domestica Borb, cv. Antonówka) submitted to cold and warm stratifications. Our results indicated that the elimination of embryonal dormancy in apple seeds was connected with a change from domination of PPP to domination of glycolysis in sugar catabolism during cold stratification. Cyanide pretreatment affected the C 6 /C 1 ratio and the activities of the enzymes under study in such a manner that the maxima of PPP and glycolysis appeared earlier during stratification. We suggest a regulatory role of cyanide in removal of dormancy.