Effect of nitrogen sources on the chemical components in young plants

Glucose metabolism in detached leaves of tomato plants grown with ammonium and nitrate as nitrogen sources

“…This seems to be due to the fact that the synthesis of high molecular compounds might be inhibited, and/or that glucose metabolism might proceed to a degradative process in the ammonium-plants in the dark. Small utilization of glucose for the synthesis of high molecular compounds in the dark (night) may result in an accumulation of soluble sugar in the ammonium· plants as shown in the previous paper ( 12 ).…”

“…The effects of ammonium nitrogen and nitrate nitrogen as nitrogen sources on the growth of higher plants have been intensively studied by numerous workers, Ammonium nitrogen in a high concentration is believed to cause a retardation of growth In higher plants, while nitrate nitrogen does not ( 1, 2,1,11,12,27 ). The reports from our laboratory have revealed that a clear difference in chemical components (including inorganic and organic components) occur~ between tomato plants grown with ammonium nitrogen (ammonium-plants) and those grown with nitrate nitrogen (nitrate-plants).…”

“…The reports from our laboratory have revealed that a clear difference in chemical components (including inorganic and organic components) occur~ between tomato plants grown with ammonium nitrogen (ammonium-plants) and those grown with nitrate nitrogen (nitrate-plants). Generally, the ammonium-plants contained a lower concentration of organic acids than the nitrate-plan~s and showed an accumulation of soluble sugar, ammonium, amldes, basic amino acids such as lysine and arginine, and glucosamine ( 12,22),…”

Movement of ammonium in paddy soils in Taiwan

“…Furthermore, it is likely that the diffusion of fertilizers reduces, if any, a harmful effect of high salt concentration on rice plants (12) and on soil microbes (23).…”

15N-Allocation of15NH4-N and15NO3-N to Nitrogenous Compounds at the Vegetative Growth Stage of Potato Plants

“…When sugar beet, tomato, and rice were grown with NH4 +, large amount of free NH4 +, arginine, lysine (Lys), and amides accumulated compared to NQ-nutrition (Harada et al 1968). When field bean was grown with NH4-N, the accumulation of serine, asparagine (Ash), and glutamine (Gin) was 3 to 10 times larger than with NO3- (Chaillou et al 1986).…”