Calcium inhibition of potassium absorption in corn roots.

Effect of lanthanum on ion absorption in corn roots.

Short term (10 min) influx of (86)Rb-labeled potassium into corn (Zea mays L. WF9 x M14) root segments was inhibited by La (NO(3))(3) or LaCl(3). Half maximal inhibition of K(+) influx from 0.25 mm KCl was obtained with 0.025 mm La(3+). Kinetic analysis indicated the inhibition to be of a competitive nature. With absorption periods exceeding one hour, La(3+) no longer inhibited, but rather stim...

The Effect of Calcium on Potassium Accumulation in Corn and Soybean Roots.

Mercury in some chemical fertilizers and the effect of calcium superphosphate on mercury uptake by corn seedlings (Zea mays L.).

Mercury (Hg) contents in ten chemical fertilizers were determined, and the effect of calcium superphosphate (CSP) on the uptake and translocation of Hg in corn seedlings was investigated by pot experiments. CSP was applied at the levels of 0, 66.7, and 133.4 mg P2O5/kg to Hg-treated (2 mg/kg) and untreated soils. CSP had the highest Hg content (5.1 mg/kg), followed by the NPK compound fertilize...

Effect of Zinc Nutrition on Growth Traits, Sodium and Potassium Concentrations and Calcium Molarity Ratio of Roots and Leaves in Two Olive Cultivars under Different Salinity Levels

In order to study the effect of zinc (Zn) nutrition on relative tolerance of olive (Olea europea L.) seedlings to salinity, a factorial pot experiment was conducted, based on completely randomized design with three replications, during fall 2013. One-year seedlings of two olive cultivars (‘Frontoio’ and ‘Conservolea’) were planted in 10-litre plastic pots containing sand and perlite (1:1 ratio)...

Absorption of Magnesium and Chloride by Excised Corn Roots

Absorption characteristics of Mg2+ and Clwere investigated with 5-day-old excised corn (Zea inays) roots. Uptake from both 0.5 and 10 milliequivalents per liter MgCl2 solutions occurred at steady state rates for the first 6 hours. Inhibition by dinitrophenol and low temperatures established that absorption during this period was metabolically mediated in the absence and presence of Ca2+. Absorp...