Dynamics of the Biosynthesis of Niacin During Development to Maturity of Soybean Seed

Dynamics of the biosynthesis of niacin was followed in developing seed of four soybean genotypes under the defined climatic conditions in the course of three years. Tests were carried out at weekly intervals from the moment the seed was suitable for analysis up to its full maturity with the moisture content of about 14 %. Observation of the content of niacin determined more intensive synthesis of this vitamin in the third and fourth development stages, at the time of the highest cumulation of dry matter and metabolic activity. Maximal concentrations of niacin were noticed in the year in which along moderate temperatures considerably ampler precipitation was recorded. A comparison of the fluctuation of proteins and fatty acids with the fluctuation of niacin content confirm its role in the biosynthesis of these most important components of soybean seed.