Decreased cytokinin (CK) export from roots in drying soil might provide a root-to-shoot signal impacting on shoot physiology. Although several studies show that soil drying decreases the CK concentration of xylem sap collected from the roots, it is not known whether this alters xylem CK concentration ([CK(xyl)]) in the leaves and bulk leaf CK concentration. Tomato (Solanum lycopersicum L.) plan...

Sodium use combined with NPK fertilizers can potentially increase beetroot (Beta vulgaris L.) yield and quality. This hypothesis was studied in three field experiments Western Transbaikalia throughout the seasons 2012-2014. The effects of a combination different Na amounts (10, 20, 40 kg Na/ha) chloride on yield, storage root quality, sugar accumulation were estimated. As result, application in...

The cause of the cell-to-medium electrical potentials of plant and animal cells is incompletely understood. In some cases, the potentials appear to be diffusion potentials in which potassium ions play a major role (3,7.) This is indicated A) by potentials which are close to the Nernst potentials for potassium and B) by cell-to-medium potentials which become markedly less negative when the exter...

The influence of various c oncentrations of K, nitrogen sources, and inoculation with root-knot nematode Meloidogyne javanica were evaluated in tomato plants. Increased potassium concentration increased top and root fresh weights of intact plants and fresh weights of excised roots. Nitrate-fertilized plants weighed more than plants receiving ammonium independent of the K level in the medium. Ne...

In order to evaluate the effects of potassium nitrate nutrition on some low temperature tolerance indices in Citrus aurantium seedlings a factorial experiment was conducted based on a completely randomized design with four replications at the Institute of Citrus Research in Ramsar. Treatments were potassium nitrate nutrition at four levels (0, 2.5, 5, and 10 mM) and temperature at four levels (...