Soluble Sugars, Respiration, and Energy Charge during Aging of Excised Maize Root Tips
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چکیده
منابع مشابه
Soluble Sugars, Respiration, and Energy Charge during Aging of Excised Maize Root Tips.
Oxygen uptake and energy charge were monitored during aging of excised maize root tips and related to the soluble sugar content and exogenous sugar supply.Oxygen uptake declined immediately after excision to 50 to 30% of its initial value after 8 and 24 hours of aging at 25 C. There was also a sharp decline of the total sugar content (glucose, fructose, and sucrose). Starch content was very low...
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Energy charge and fermentative metabolism under anoxia were monitored in excised maize root tips after various times of aging in air and were related to their soluble sugar content. The energy charge value, which was 0.9 in air irrespective of the time of aging, dropped to a lower value within minutes of transfer to a nitrogen atmosphere. This value was dependent upon sugar content of the tissu...
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Claude ROBY,* Richard BLIGNY,t Roland DOUCE,t Shu-I. TUt and Philip E. PFEFFERt§ *Department de Recherche Fondamentale/Resonance Magnetique Biologique et Medicale and tPhysiologie Cellulaire Vegetale Centre d'Etudes Nucleaires et Universite Scientifique et Medicale 85x, 38041 Grenoble Cedex, France, and lEastern Regional Research Center, Agricultural Research Service, USDA, Philadelphia, PA 191...
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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...
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Previous to 1934 ROBBINS (10, 11), ROBBINs and MANEVAL (12, 13), KOTTE (6, 7), CHAMBERS (1, 2), MALYSCHEV (8, 9), GAUTHERET (4, 5), and WHITE (14-17) had reported the cultivation of excised root-tips of various species of plants over periods in some cases as great as 5 months. In such of these studies as extended over considerable periods of time, the growth rates showed a more or less continuo...
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ژورنال
عنوان ژورنال: Plant Physiology
سال: 1980
ISSN: 0032-0889,1532-2548
DOI: 10.1104/pp.66.3.516