1940
DOI: 10.1111/j.1469-8137.1940.tb07137.x
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Oxidase Systems in the Tissues of the Higher Plants

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Cited by 14 publications
(4 citation statements)
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“…50 a small loss persists, unaccompanied by consumption of free oxygen. In all experiments the loss of ascorbic acid was greater than the equivalent of the oxygen absorbed (cf, p, 38), The results so far described are consistent with the assumption that barley juice contains a direct ascorbic acid oxidase similar to that previously obtained from other plants (cf, summaries by Boswell &Whiting, 1940 andGreen, 1940), Ascorbic acid is (Johnson & Zilva, 1937;Keilin & Mann, 1938); and by the cytochrome system (Keilin & Hartree, 1938), The following sections detail the results obtained with each of these systems:…”
Section: The Effect Of Cxanidesupporting
confidence: 84%
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“…50 a small loss persists, unaccompanied by consumption of free oxygen. In all experiments the loss of ascorbic acid was greater than the equivalent of the oxygen absorbed (cf, p, 38), The results so far described are consistent with the assumption that barley juice contains a direct ascorbic acid oxidase similar to that previously obtained from other plants (cf, summaries by Boswell &Whiting, 1940 andGreen, 1940), Ascorbic acid is (Johnson & Zilva, 1937;Keilin & Mann, 1938); and by the cytochrome system (Keilin & Hartree, 1938), The following sections detail the results obtained with each of these systems:…”
Section: The Effect Of Cxanidesupporting
confidence: 84%
“…50 a small loss persists, unaccompanied by consumption of free oxygen. In all experiments the loss of ascorbic acid was greater than the equivalent of the oxygen absorbed (cf, p, 38), The results so far described are consistent with the assumption that barley juice contains a direct ascorbic acid oxidase similar to that previously obtained from other plants (cf, summaries by Boswell &Whiting, 1940 andGreen, 1940), Ascorbic acid is Fig, 2, Effect of cyanide on oxygen absorption by barley juice + ascorbic acid. O,Q barley juice + ascorbic acid only, # barley juice + ascorbic acid-t-Af/500 cyanide, ^ barley juice + ascorbic acid + M/iooo cyanide, also known to be oxidizable by other systems present in plants; notably by o-quinones arising from the activity of peroxidase (Szent-Gyorgyi, 1928) or catechol (polyphenol) oxidase (Johnson & Zilva, 1937;Keilin & Mann, 1938); and by the cytochrome system (Keilin & Hartree, 1938), The following sections detail the results obtained with each of these systems: Peroxidase.…”
Section: The Effect Of Cxanidesupporting
confidence: 76%
“…Many of the reagents and methods used by Onslow (1920Onslow ( ,1921Onslow ( , 1931 and Joyet-Lavergne (1935, 1937 and outlined by Boswell and Whiting (1940) were employed to determine the presence of both oxidases and reductases. It is not intended that the material presented here be taken as proof of a causal relationship between oxidases and endodermal maturation; it is my belief, however, and it will be plain in the discussion which follows, that the presence of an oxidase system in endodermal tissues may be a causal factor in endodermal and related suberic depositions.…”
Section: The Development Of the Endodermis In Roots Ofmentioning
confidence: 99%
“…Bhagvat & Hill, 1950, various tissues); polyphenol oxidase (cf. Boswell &Whiting, 1940, in potato tubers, andBonner &Wildman, 1946, in spinach leaf); ascorbic acid oxidase (cf. James, Heard &James, 1944, in barley shoots, andWaygood, 1950, in wheat seedhngs); or a-hydroxy-acid oxidase (cf.…”
Section: Discussionmentioning
confidence: 99%