potassium plays an important role in improving plant tolerance to abiotic stresses such as salinity stress. to evaluate the effect of potassium on salinity tolerance of two wheat cultivars, kavir (as salt tolerant) and qods (as salt-sensitive), a pot experiment was conducted, using a factorial experiment based on randomized complete block design with three replications in different treatments (...

to investigate the effect of k fertilizer on yield and yield components of three watermelon cultivars, a two-year study (2007-2008) was conducted in ardestan agricultural research center (isfahan province) by using of split plot randomized based on complete block design in three replications. three watermelon cultivars (‘sugar baby’, ‘charleston grey’ and ‘mahbubi’), were assigned as main plots...

In recent years, several studies focused on the biochemical analysis of breast cyst fluid composition. It has been shown that breast cysts lined by apocrine epithelium contain higher levels of potassium and dehydroepiandrosterone-sulphate as compared to cysts lined by flattened cells, and that women with apocrine cysts are more likely to develop breast cancer. In the present study, we measured ...

to study the effects of foliar application of common and nano-sized iron sulphate on five sunflower cultivars (alster, olsion, hysun36, yourflour and hysun33) under two levels of salinity (0 and 100 mm nacl), a pot experiment in factorial based using a randomized complete block design with three replications was conducted. plant height, leaf area, shoot weight, chlorophyll content and the conce...

introduction: the regulation of the body fluid content (osmoregulation) of an aquatic animal, is performed by several organs. in fish, osmoregulatory mechanisms are based on the function of specialized cells (ionocytes) located in various tissues and organs including gills. na+, k+-atpase is one of the main osmoregulatory enzymes enabling the use of atp as a source of energy for ion transport t...

The interaction of sodium and potassium ions in the context of the primary entry of Na(+) into plant cells, and the subsequent development of sodium toxicity, has been the subject of much recent attention. In the present study, the technique of compartmental analysis with the radiotracers (42)K(+) and (24)Na(+) was applied in intact seedlings of barley (Hordeum vulgare L.) to test the hypothesi...

this study was carried out in the general commission for scientific agricultural research (gcsar) at der ez zour agricultural research center, during 2009- 2010 growing seasons. the role of na+, k+, na+/k+, carbohydrates accumulation of leaves, and sugar content of roots on the osmotic adjustment was studied in 10 sugar beet genotypes (five were monogerms and five were multigerms), under salini...

OBJECTIVE To evaluate the salt intake and urinary Na+/K+ ratio in a randomized sample from an ethnically mixed urban population. METHODS A randomized residential sample of 2,268 individuals aged 25-64 in Vit ria, ES, was selected, of whom 1,663 (73.3%) reported to the hospital for standardized tests. Salt, Na+ and K+ intake was estimated from 12-hour urine excretion (7 p.m. to 7 a.m.) and fro...

The Sungun porphyry copper deposit is located in northwestern Iran and is associated with diorite/granodiorite to quartz-monzonite of Miocene age, which intruded Eocene volcanosedimentary and Cretaceous carbonate rocks. Copper mineralization was accompanied by both potassic and phyllic alteration. Three main mineralization related alteration episodes (potassic, transition, and phyllic alteratio...

a greenhouse research work was conducted to study the patterns of na+ and k+ distribution in root, stem and leaf during three growth stages of four iranian alfalfa ecotypes and to find correlation between these patterns and plant salt tolerance. treatments were replicated three times in a factorial experiment of a completely randomized block design. based on the threshold of salt tolerance in a...