Transport of Dicarboxylic Acids in Castor Bean Mitochondria
نویسندگان
چکیده
منابع مشابه
Transport of dicarboxylic acids in castor bean mitochondria.
Mitochondria from castor bean (Ricinus communis cv Hale) endosperm, purified on sucrose gradients, were used to investigate transport of dicarboxylic acids. The isolated mitochondria oxidized malate and succinate with respiratory control ratios greater than 2 and ADP/O ratios of 2.6 and 1.7, respectively. Net accumulation of (14)C from [(14)C]malate or [(14)C]succinate into the mitochondrial ma...
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We report the isolation of mitochondria from the endosperm of castor beans (Ricinus communis). These mitochondria oxidized succinate, external NADH, malate and pyruvate with respiratory-control and ADP/O ratios consistent with those found previously with mitochondria from other plant sources. The mitochondria exhibited considerable sensitivity to the electron-transport-chain inhibitors antimyci...
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The demonstration that the reactions of fl oxidation and the glyoxylate cycle occur in the glyoxysome, a cellular organelle isolated from castor bean endosperm, has raised the question of the intracellular location of the enzymatic activation of free fatty acids in this tissue. Glyoxysomes, isolated on sucrose gradients, have been shown to contain a thiokinase which, in the presence of CoA, MgC...
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During germination and early growth of the castor bean (Ricinus communis) nitrogenous constituents from the endosperm are transferred via the cotyledons to the growing embryo. Exudate collected from the cut hypocotyl of 4-day seedlings contained 120 millimolar soluble amino nitrogen and glutamine was the predominant amino acid present, comprising 35 to 40% of the total amino nitrogen. To determ...
متن کاملLectins in castor bean seedlings.
The amounts of the two lectins (ricin and Ricinus communis agglutinin) in tissues of castor bean seedlings were followed during germination and early growth. For measurement, lectins in extracts were separately eluted from Sepharose columns; an antibody to the agglutinin was also used to detect the lectins by immunodiffusion. The endosperm of the dry seed contains 3.5 mg total lectin (5.6% of t...
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ژورنال
عنوان ژورنال: Plant Physiology
سال: 1983
ISSN: 0032-0889,1532-2548
DOI: 10.1104/pp.72.2.434