Malonate and Carrot Root Respiration
نویسندگان
چکیده
منابع مشابه
Glycolytic control of respiration during aging of carrot root tissue.
Changes in respiration in aging carrot slices are correlated with a characteristic sequence of activation of the irreversible reactions of the glycolytic pathway. The induced "wound" respiration increases in two stages; these appear to correspond to a period of active synthesis, when ADP, produced in the cytoplasm from synthetic reactions, activates pyruvate kinase, and a period of readjustment...
متن کاملRegulation of salt respiration in carrot root slices.
In slices of carrot-phloem parenchyma washed for 7 days in water at 20 C, 50 mm KCl stimulates respiration by up to 100% of the ground respiration within 4 minutes of application. The data presented imply that ADP liberated in the cytoplasm as a consequence of KCl accumulation first stimulates a regulator reaction requiring ADP (phosphoglycerate kinase). Thereafter, the point of control alterna...
متن کاملThe Effect of Malonate on Tissue Respiration*
Malonate has long been regarded as a specific inhibitor for succinic dehydrogenase. The original evidence was obtained in Thunberg experiments with resting bacterial cultures (1, 2), and similar results were later obtained manometrically with brain and muscle tissue (3). The apparent specificity of this inhibition has led workers to use respiration experiments with malonate as a basis for theor...
متن کاملEffect of adenine nucleotides on the respiration of carrot root slices.
Sodium pyruvate and dinitrophenol stimulated O(2) uptake of freshly cut phloem parenchyma from carrot roots by 63 and 120% at optimal concentrations, indicating that production of pyruvate by glycolysis regulates over-all respiratory rate. Adding 0.5 to 6.7 mm Na(3)ADP and Na(3)ATP to slices rapidly stimulates respiration rate by 20 to 85%. The effect is greater at the lower end of this concent...
متن کاملSugars in the Root of the Carrot.
There is a lack of agreement in the literature as to whetlher or not fructose occurs in the roots of the carrot. Apparenitly the reducing sugar is thought by many to be composed largely or entirely of glucose, and that little or no fructose is present. Sucrose and glucose have been reported by DIETRICH (5), RITTENHAUSEN (5), PLATENIUS (8, 9), BARNES (1), and WERNER (14). Sucrose was identified ...
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ژورنال
عنوان ژورنال: Australian Journal of Biological Sciences
سال: 1952
ISSN: 0004-9417
DOI: 10.1071/bi9520064