Effects of partial root salt stress on seedling growth and photosynthetic characteristics of winter wheat Split-root systems applied to the study of the legume-rhizobial symbiosis: What have we learned? Root Cluster Formation and Citrate Exudation of White Lupin (Lupinus albus L.) as Related to Phosphorus Availability Osmotic and ionic stress effects of high NaCl concentration on seedlings of four wheat (Tritium aestivum L.) genotypes