regulates nitrate assimilation regulation of small molecule metabolic process biological regulation regulation of nitrate assimilation GO:0090352 Any process that modulates the rate, frequency, or extent of the uptake, from the environment, of nitrates, inorganic or organic salts and esters of nitric acid and the subsequent reduction of nitrate ion to other, less highly oxidized, inorganic nitrogenous substances. tb 2010-06-10T04:11:13Z biological_process regulation of nitrogen cycle metabolic process