Effects of Lanthanum on Liquid Culture and Contents of Amino Acids of Nostoc Commune Flagelliforme Cells

摘要

The effects of La(NO_3)_3 on the liquid culture and the contents of amino acids of Nostoc commune flagelliforme cells were studied. It is indicated from the experimental results that the growth of Nostoc commune flagelliforme cells can be stimulated by La(NO_3)_3 at the concentrations from 1 to 200 mg.L~-1, and among them the treatment of 100 mg.L~-1 La(NO_3)_3 has the largest A_670 and dry weight which increased by 64.9/100 and 61.1/100, respectively as compared with the control, and La(NO_3)_3 can also influence the contents of some kinds of amino acids in Nostoc commune flagelliforme cells. the contents of asperity acid and glutamic acid decreased by 59.9/100 and 57.9/100, respectively, and that of praline increased by 24.5/100 with the treatment of 200 mg.L~-1 La(NO_3)_3.