UPTAKE OF NITRATE AND AMMONIUM ION BY CELL SUSPENSION CULTURES OF VIGNA RADIATA

摘要

A study was conducted to examine the effect of pH on the uptake of NH_4~+ and NO_3~- by the cell suspension culture of Vigna radiata. Uptake of NH_4~+ was faster than NO_3~- under all conditions of the medium whereas uptake of NH_4~+ and N(V both wereaffected by the pH of the medium. Maximum uptake of NH_4~+ was observed on pH 4.5. Uptake of NO_3~- was faster in the culture having pH 7.0. It is therefore concluded that pH of the medium influence the uptake of both NH_4~+ and NO_3~- in the cell suspension culture of Vigna radiata.