Increased auxin levels in root primordia are important controlling branching, while their interaction with abscisic acid (ABA) likely regulates lateral development water-deficient plants. The role of ABA accumulation regulating branching was investigated using immunolocalization to detect (indoleacetic acid, IAA) and (abscisic acid) the ABA-deficient barley mutant Az34 its parental genotype (cv...

In most plants the concentration of sodium is much lower in the leaves than in the roots. In other species, however, there seems to be an equal distribution of this element between the shoots and the roots. The squash plant, Cucurbita ~, used in the present study is an example of the type of plant that in respect to the roots maintains a relatively low sodium concentration in its leaves. When t...

Exposure of the leaf canopy of corn seedlings (Zea mays L.) to atmospheric CO(2) levels ranging from 100 to 800 mul/l decreased nitrate accumulation and nitrate reductase activity. Plants pretreated with CO(2) in the dark and maintained in an atmosphere containing 100 mul/l CO(2) accumulated 7-fold more nitrate and had 2-fold more nitrate reductase activity than plants exposed to 600 mul/l CO(2...

Cesium uptake by sodium-loaded frog sartorius muscles was inhibited 100% by 10(-6)M ouabain and 10(-6)M cymarin. The doses for 50% inhibition of cesium uptake by five cardiotonic aglycones were 1.5 x 10(-6)M for strophanthidin, 2 x 10(-7)M for telocinobufagin, 1.6 x 10(-6) for digitoxigenin, 2.4 x 10(-6)M for periplogenin, and 6.3 x 10(-6)M for uzarigenin. Because of the limited solubility of s...

Iron from injured muscles can produce acute renal failure. Cytochrome P 450 is one enzyme that involved in iron-related acute renal failure. Inhibition this enzyme may decrease rhabdomyolysisinduced myoglobinuric nephrotoxicity. The aim of this study was comparison effect of cimetidine, estradiol and vitamin E on myoglobinuric renal toxicity in rats. This study was conducted in 6 groups. Normal...