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THE RESPIRATION CLIMACTERIC IN APPLE FRUITS
Author(s) -
HULME A. C.,
JONES J. D.,
WOOLTORTON L. S. C.
Publication year - 1965
Publication title -
new phytologist
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.742
H-Index - 244
eISSN - 1469-8137
pISSN - 0028-646X
DOI - 10.1111/j.1469-8137.1965.tb05383.x
Subject(s) - climacteric , respiration , oxidative phosphorylation , biochemistry , pyruvate carboxylase , horticulture , chemistry , biology , botany , enzyme , endocrinology , menopause
S ummary Changes in the activity, in terms of O 2 uptake and CO 2 output in presence of malate and succinate substrates and of succinic and malic dehydrogenases, diaphorase and cytoehrome‐ c reductase, of mitochondrial preparations from the peel and pulp of apple tissue, were followed during the development of the respiration climacteric in fruit on the tree. There was a general increase in activity beginning in peel tissue. Oxidative phosphorylation by the mitochondrial preparations was maintained at a high level throughout the period. At the same time a threefold increase in malic enzyme (M.E.) and carboxylase activity was observed. It is suggested that these observations show that the climacteric rise in apple fruits attached to the tree is initiated by an increase in mitochondrial activity and develops through the joint action of increased activity of M.E. and carboxylase.