Effects of Root Restriction on Plant Growth, Root Respiration, Activities ofH+-ATPase and H+-PPase in Tomato Seedlings Effects of Root Restriction on Plant Growth, Root Respiration, Activities ofH+-ATPase and H+-PPase in Tomato Seedlings Effect of Nitric Oxide on Ions Absorption in Excised Root Tips of wheat Seedlings under Drought Stress Expression of Auxin-Related Genes during Dedifferentiation of Mature Embryo in Wheat