Circadian rhythmicity in phosphorylase activity and glycogen content in the heart muscle of the scorpion,Heterometrus fulvipes, C.L. Koch

Jayaram,; Dc, Reddy; Bp, Naidu

doi:10.1007/bf01922947

Cited by 5 publications

(4 citation statements)

References 9 publications

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“…Jayaram et al . () described the circadian rhythmicity in phosphorylase activity and glycogen content in the heart muscle of the scorpion peaking at 20.00 h and low at 08.00 h Jayaram and Padmanabha Naidu () found that females had a significant lower heartbeat and higher carbohydrate levels than males, which showed higher phosphorylase, succinate (SDH), lactate (LDH) and dehydrogenases activities.…”

Section: Resultsmentioning

confidence: 99%

“…Jayaram and Padmanabha Naidu (1979) found that females had significantly lower heartbeat and higher carbohydrate levels than males, which had higher phosphorylases, SDH, LDH and DHO activities. Chengal Raju et al (1976) have shown phosphorylase activity peaked at 20.00 h and was lowest at 08.00 h. Jayaram et al (1978) described the circadian rhythmicity in phosphorylase activity and glycogen content in the heart muscle of the scorpion found peaking at 20.00 h and was lowest at 08.00 h. Jayaram and Padmanabha Naidu (1979) found significantly lower heartbeat and higher carbohydrate levels in females. However, males had higher phosphorylases, SDH, LDH and dehydrogenases activities.…”

Section: Phosphorylasementioning

confidence: 99%

“…Inhibitory effect of cholinesterase was shown to follow a circadian rhythm with maximum activity of the enzyme at 20.00 h and minimum at 08.00 h. In 1974 they suggested that the heartbeat is neurogenic as evidenced by the presence of a cardiac ganglion with its spontaneous rhythmic burst activity. Jayaram et al (1978) described the circadian rhythmicity in phosphorylase activity and glycogen content in the heart muscle of the scorpion peaking at 20.00 h and low at 08.00 h Jayaram and Padmanabha Naidu (1979) found that females had a significant lower heartbeat and higher carbohydrate levels than males, which showed higher phosphorylase, succinate (SDH), lactate (LDH) and dehydrogenases activities.…”

Section: Diel Enzyme Activity Effect On Circulationmentioning

confidence: 99%

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Review of diel rhythmic activities in physiological functions of scorpions

Warburg

2013

Entomological Science

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In this study I review the subject of biological rhythms in scorpions. This will include only some of the diel rhythmic endogenous physiological functions and not the locomotory rhythmicity, which will be dealt separately. Most studies reported here were conducted on 13 scorpion species that were studied in 39 different studies. Most of these (66.7%) were studies on a single species (Heterometrus fulvipes). Being a scorpionid, it sits and waits near its burrow not being very active, especially the females. The fact that experimenting was carried out irrespective of species diversity, gender, ecological or physiological conditions, and was usually done on animals kept in captivity for some time before the experimenting had started, is a major drawback to this kind of study. Although the main conclusion appears to be that enzymes reached their peak activity at 20.00 h, there are some exceptions showing otherwise that need further study in order to explain them.

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Section: Resultsmentioning

confidence: 99%

Section: Phosphorylasementioning

confidence: 99%

Section: Diel Enzyme Activity Effect On Circulationmentioning

confidence: 99%

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Review of diel rhythmic activities in physiological functions of scorpions

Warburg

2013

Entomological Science

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“…A series of 5 in situ hearts maintained for 30 min in accelerated state and another series of 5 hearts in inhibited state are removed in parallel and pooled as above after recording the rate of heart beat and these denote one accelerated heart sample and one inhibited heart sample respectively. The heart samples were prepared between 10 and 12 hr of the day since this scorpion is known for notable diel variations in heart rate and some of the associated enzymes (Devarajulu Naidu and Padmanabha Naidu 1976;Chandrasekhara Reddy and Padmanabha Naidu 1977;Jayaram et al 1978).…”

Section: Methodsmentioning

confidence: 99%

Utilisation of carbohydrates in the heart of the scorpionHeterometrus fulvipes (C L Koch)

Jayaram

Naidu

1980

Proc. Indian Acad. Sci. (Anim. Sci.)

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The changes in the levets of total anthrone positive substances glycogen and glucose and the activities of phosphorylase, lactate dehydrogenase and succinate dehydrogenase were studied in the in situ heart of the scorpion H. fulvipes, based on the theme of acceleration and inhibition. TAPS and glucose showed appreciable depletion in the accelerated hearts and conservation in the inhibited hearts. Glycogen depletion in the accelerated hearts is not significant while conservation in the inhibited hearts is significant. Both active and total phosphorylases as welt as the combined ratio showed increasing trend with increase in heart rate and vice versa. The role of carbohydrates as metabolic fuel to sustain the heart beat is also discussed.

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Carbohydrate metabolism in the central nervous system of the megalobulimus oblongus snail during anoxia exposure and post‐anoxia recovery

et al. 2004

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The effects of anoxic exposure and the post-anoxia aerobic recovery period on carbohydrate metabolism in the central nervous system (CNS) of the land snail Megalobulimus oblongus, an anoxia-tolerant land gastropod, were studied. The snails were exposed to anoxia for periods of 1.5, 3, 6, 12, 18, or 24 hr. In order to study the post-anoxia recovery phase, snails exposed to a 3-hr period of anoxia were returned to aerobic conditions for 1.5, 3, 6, or 15 hr. Glycogen and glucose concentrations in the CNS, hemolymph glucose concentration, and glycogen phosphorylase (active form, GPa) activity in the CNS were analyzed. Anoxia does not significantly affect the concentration of CNS glucose but induces hyperglycemia and a reduction of CNS GPa activity. The glycogen concentration was decreased at 12 hr of anoxia; however, by 18 and 24 hr in anoxia, the glycogen content was not significantly different from basal control values. During the post-anoxia period, the reduction in GPa activity and the increased hemolymph glucose concentration induced by anoxia returned to control values. These results suggest that the CNS of M. oblongus may use hemolymph glucose to fulfill the metabolic demands during anoxia. However, the hypothesis of tissue metabolic arrest cannot be excluded.

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Circadian rhythmicity in phosphorylase activity and glycogen content in the heart muscle of the scorpion,Heterometrus fulvipes, C.L. Koch

Abstract: Maximal activity levels of phosphorylase A and AB at 20.00 h alternate with minimal levels at 08.00 h of the day, while the glycogen content exhibited a reverse trend in the heart of the scorpion, Heterometrus fulvipes.

Cited by 5 publications

References 9 publications

Review of diel rhythmic activities in physiological functions of scorpions

Review of diel rhythmic activities in physiological functions of scorpions

Utilisation of carbohydrates in the heart of the scorpionHeterometrus fulvipes (C L Koch)

Carbohydrate metabolism in the central nervous system of the megalobulimus oblongus snail during anoxia exposure and post‐anoxia recovery

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