ABSTRACT
The present results showed evidence that nicotinamide is absorbed and translocated from the roots to the shoots and vice-versa. The length of the main stem and root as well as their lateral branches was increased by the increase of nicotinamide concentrations applied. This led to parallel increases in fresh and dry weights of the plant organs. The apical dominance of plants sprayed with 80 ppm nicotinamide was less than that of those sprayed with 10 ppm concentration. However, plants sprayed twice were more responsive than those sprayed once. Carbohydrates mainly polysaccharides, nitrogenous compounds mainly proteins, nucleic acids and uptake of some mineral elements-were increased by the increase of nicotinamide concentrations applied. Nicotinamide induces flowering and fruit growth in number and weight of fruits consequent to spraying mainly with 80 ppm concentrations