CONWAY and HINGERTY1) showed that feeding of rats with K-free diet produced high Na and low K contents in muscle, the K loss being greater than the Na gain during a short time of K-deficiency, but that a further decrease in K content by feeding of K-free diets from 4 to 26 days was compensated by an equivalent gain of Na. COOKE et al.2) demonstrated also in the rat skeletal muscle made K-defici...

Vasoconstrictor responses to norepinephrine were determined during constant flow perfusion with warm Krebs solution in dog mesenteric arteries. The arteries were then stored 20—24 hours at 3°C in one of the following isosmotic solutions: Krebs, complex K (KC1, CaCl 2 , KHCO 3 , and glucose), NaCl, KC1, sucrose, or mannitol. After storage, arteries were again perfused with warm Krebs solution, a...

in this experiment, physiological responses of two citrus rootstocks [sour orange (citrus aurantium l.) and trifoliate orange (poncirus trifoliata raf.)] were investigated under in vitro salt stress conditions. this study was conducted on a completely randomized factorial design. explants (nucellar seedling obtained from seeds) of both rootstocks were transferred to murashige and skoog (ms) sol...

Soil salinity is an increasingly serious problem worldwide that reduces agricultural output potential. Selected beneficial soil bacteria can promote plant growth and augment tolerance to biotic and abiotic stresses. Bacillus subtilis strain GB03 has been shown to confer growth promotion and abiotic stress tolerance in the model plant Arabidopsis thaliana. Here we examined the effect of this ben...

in order to determine the effects of water deficit at different growth stages of sugar beet and optimal usage of water on quality and quantity characters of sugar beet, a factorial experiment based on randomized complete block design was conducted with 13 treatments and four replications in 2000 and 2001 in agricultural research center of hamadan. for the first factor, irrigation withheld in th...

Leymus chinensis has extensive ecological adaptability and can grow well in saline-alkaline soils. The knowledge about tolerance mechanisms of L. chinensis could be base for utilization of saline-alkaline soils and grassland restoration and rebuilding. Two neutral salts (NaCl : Na₂SO₄ = 9 : 1) and two alkaline salts (NaHCO₃ : Na₂CO₃ = 9 : 1) with concentration of 0, 100, and 200 mmol/L were use...

Mitochondria were prepared by a method including a Percoll purification step after the rapid homogenization of livers of fed rats which had been perfused either under unstimulated conditions or in the presence of vasopressin and/or glucagon. The two hormones separately or together increased the total calcium content of the mitochondria. This enhancement was accompanied by parallel increases in ...

1 The depletion of noradrenaline (NA) in the rat anococcygeus muscle and vas deferens by reserpine and the effect on this of the abolition of nerve activity by pithing and reinforcement of nerve activity by stimulation of the spinal cord outflows has been studied.2 NA depletion of the anococcygeus and vas deferens measured 24 h after reserpine was similar and was related to dose. The heart was ...

Low potassium and magnesium status and decreased Na, K-pump activity is an endemic condition among rural Northeast Thais. The authors examined the effect of supplementing potassium and magnesium on erythrocyte potassium, sodium and magnesium content and on Na, K-pump activity. Rural Northeast Thai renal stone patients (62) were recruited, divided into four groups and supplemented for one month ...