+ Site Statistics
References:
52,654,530
Abstracts:
29,560,856
PMIDs:
28,072,755
+ Search Articles
+ Subscribe to Site Feeds
Most Shared
PDF Full Text
+ PDF Full Text
Request PDF Full Text
+ Follow Us
Follow on Facebook
Follow on Twitter
Follow on LinkedIn

+ Translate
+ Recently Requested

Effects of different light wavelengths at equal irradiance on testis weight protein content and potassium p nitrophenylphosphatase activity in the syrian hamster



Effects of different light wavelengths at equal irradiance on testis weight protein content and potassium p nitrophenylphosphatase activity in the syrian hamster



Life Sciences 40(15): 1479-1486



The effects of different light wavelengths at equal irradiance on testis weight, testis protein content, and testis K-paranitrophenylphosphatase (K-pNPPase) activity were studied in the Syrian hamster. One group (long photoperiod) was maintained on a light:dark cycle of 14:10, and another group (short photoperiod) on a cycle of 10:14. Five other groups were maintained on a cycle of 10:14 but with a one hour pulse of equally intense illumination in the middle of the dark period with UV, blue, green, yellow or red light. Animals exposed to a long photoperiod or UV, blue or green light pulses had significantly greater testis weights--up to eightfold greater than those in the yellow or red or short photoperiod groups. Organ protein content closely paralleled organ weight, but the protein/wet weight ratio was consistently higher in the larger organ groups. K-pNPPase and Mg-pNPPase activities were significantly higher in the large organ groups, even when expressed per mg protein. Therefore, at a balanced irradiance of 0.2 uw/cm2, light wavelength exerts a profound effect on testicular weight, protein content, and K-pNPPase and Mg-pNPPase activities. Testicular involution is a process that is selective with regard to protein biosynthesis.

(PDF emailed within 1 workday: $29.90)

Accession: 005300135

Download citation: RISBibTeXText



Related references

Effect of light irradiance and wavelength on the Syrian hamster reproductive system. Endocrinology 119(2): 648-654, 1986

Cytochemical localization of cations in the testis of the Syrian hamster, utilizing potassium-pyroantimonate. American Journal of Anatomy 154(2): 245-265, 1979

The suppression of pineal melatonin content and N-acetyltransferase activity by different light irradiances in the Syrian hamster: a dose-response relationship. Endocrinology 113(1): 293-296, 1983

The photoperiodic effects of short and ultrashort light dark cycles on testicular weight and serum testosterone in the syrian hamster. Biology of Reproduction 36(SUPPL 1): 174, 1987

Potassium p nitrophenylphosphatase located at the gastric epithelial cell exterior accounts for half of the total potassium p nitrophenylphosphatase associated with sodium potassium atpase. Federation Proceedings 45(6): 1905, 1986

In vivo administration of isoproterenol or forskolin during the light phase induces increases in the melatonin content of the Syrian hamster pineal gland without a rise in N-acetyltransferase activity. Neuroscience Letters 110(3): 314-318, 1990

The effects of continuous light exposure on Syrian hamster suprachiasmatic (SCN) neuronal discharge activity in vitro. Neuroscience Letters 123(2): 160-163, 1991

Aspartate injections into the suprachiasmatic region of the Syrian hamster do not mimic the effects of light on the circadian activity rhythm. Neuroscience Letters 127(2): 215-218, 1991

Potassium p nitrophenylphosphatase activity sodium and potassium content sodium permeability and membrane lipid composition in rabbit myocardium after cholesterol rich diet. Experientia (Basel) 40(8): 812-815, 1984

The p nitrophenylphosphatase activity of sodium potassium atpase in rat brain synaptosomes ligand effects on the potassium ion dependent and independent hydrolysis. Journal of Neurochemistry 57(SUPPL): S106, 1991

Effects of lead and a low molecular weight endogenous plasma inhibitor on the kinetics of sodium potassium activated atpase and potassium activated p nitrophenylphosphatase. Clinical Science 79(2): 185-192, 1990

Effects of lead and a low-molecular-weight endogenous plasma inhibitor on the kinetics of sodium-potassium-activated adenosine triphosphatase and potassium-activated p-nitrophenylphosphatase. Clinical Science 79(2): 185-192, 1990

The effects of continuous light and lesions on the circadian variation in neuronal discharge activity of syrian hamster suprachiasmatic neurons in vitro. Journal of Physiology (Cambridge) 427: 50P, 1990

Electrical stimulation of the anterior optic chiasm mimics the phase shifting effects of light on the circadian activity rhythm of the Syrian hamster. Biological Rhythm Research 25(2): 211-213, 1994

Effects of irradiance of various wavelengths from light-emitting diodes on the growth of the harmful dinoflagellate Heterocapsa circularisquama and the diatom Skeletonema costatum. Fisheries Science 74(1): 137-145, 2008