Surfactant-Induced Ethylene Evolution and Pigment Efflux From Beet (Beta Vulgaris L.) Root Tissue

When discs of red beet (Beta vulgarisL.) root were immersed in various concentrations of glyphosate [N-(phosphonomethyl)glycine] either in phosphate (pH 6.8) or citrate (pH 6.2) buffer, no efflux of betacyanin occurred even after 1 week. This suggests that glyphosate had little or no effect on membrane permeability. When beet discs were immersed in distilled water containing glyphosate, the betacyanin efflux increased with time and concentration. Measurement of pH indicated that the solutions were strongly acidic at first, but tended to approach a pH of 6.0 over 8 h, after which time betacyanin efflux slowed down or stopped. The tissue was able to buffer the solutions sufficiently to prevent further efflux. When tissue discs were immersed in a series of citrate buffer ranging from pH 3 to 6.2, efflux occurred at pH 3 and slightly at pH 6.2. Efflux was not altered significantly with the addition of glyphosate.

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Surfactant effects on cell permeability of Beta vulgaris L root tissue

10.31274/rtd-180814-3021 ◽

1969 ◽

Author(s):

Robert Michael Millaway

Keyword(s):

Beta Vulgaris ◽

Root Tissue ◽

Cell Permeability ◽

Surfactant Effects

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Chemical and Physical Changes in Beet (Beta vulgaris L.) Root Tissue During Simulated Processing?Relevance to the "Black Ring" Defect in Canned Beets

Journal of Food Science ◽

10.1111/j.1365-2621.1990.tb01592.x ◽

1990 ◽

Vol 55 (4) ◽

pp. 1039-1041 ◽

Cited By ~ 7

Author(s):

KIRK L. PARKIN ◽

JI-SOON IM

Keyword(s):

Beta Vulgaris ◽

Black Ring ◽

Root Tissue ◽

Physical Changes

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The Respiratory Chain of Beetroot Mitochondria

Australian Journal of Biological Sciences ◽

10.1071/bi9600109 ◽

1960 ◽

Vol 13 (2) ◽

pp. 109 ◽

Cited By ~ 8

Author(s):

JT Wiskich ◽

RK Morton ◽

RN Robertson

Keyword(s):

Cytochrome C ◽

Absorption Band ◽

Beta Vulgaris ◽

Respiratory Chain ◽

Electron Acceptors ◽

Root Tissue ◽

Absorption Bands ◽

Isolated Mitochondria ◽

Ferrocytochrome C ◽

Ferricytochrome C

Mitochondria were isolated from root tissue of red beetroot (Beta vulgaris L.) and the components of the respiratory chain for oxidation of succinate and of reduced diphosphopyridine nucleotide (DPNH) were studied. Succinate, DPNH, ferrocytochrome c, and malate were used as substrates, and 2,6-dichlorophenolindophenol, ferricytochrome c, and oxygen as hydrogen (electron) acceptors. DPNH was oxidized without addition of cytochrome c and malate without addition of DPN. These observations suggest that the respiratory chain was retained intact in the isolated mitochondria. Cytochromes b, C1. and c were identified spectroscopically by the positions of their characteristic ex-absorption bands. The very small amount of cytochrome c present may indicate some loss of this component during isolation of the mitochondria. An absorption band near 600 mp' was attributed to cytochromes (a+a3).

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