He covers nitrogen nutrition, nitrate reduction, nitrite reduction, ammonia assimilation
, polyamines, amino acids, chlorophyll, proteins, and nucleic acids.
The cultured cyanobacteria (isolated from fish culture tanks) were introduced into experimental tank for assessing the rate of ammonia assimilation.
The important thing was observed when ammonia assimilation the nitrate and nitrite values were goes to high, because in the nitrogen cycle naturally the ammonia converts into nitrate and nitrite by cyanobacteria (Graph.
Uptake and assimilation rate of ammonia is normally higher than for nitrate, because no enzymatic reduction is required for ammonia assimilation.
For example, taurine appears to be ah end product of ammonia assimilation in S.
velum host and its symbionts in ammonia assimilation and the maintenance of taurine, thiotaurine, and hypotaurine pools.
In additional experiments, the effects of the ammonia assimilation inhibitor, methionine sulfoximine (MSX; Rees, 1987) were examined; MSX inhibits glutamine synthetase, which has been detected in S.
Inhibition of symbiont and host protein synthesis and host ammonia assimilation blocked sulfide-stimulated taurine synthesis; in contrast, only the inhibition of symbiont metabolism decreased the sulfide-stimulated thiotaurine synthesis.
Exposure to MSX blocked ammonia assimilation, probably contributing to the decreased taurine levels in MSX-treated clams.
Despite the MSX-induced inhibition of ammonia assimilation, thiotaurine levels in MSX-treated clams increased following sulfide exposure.