Effect of potassium and ammonium nitrate media on in vitro growth response of potato (Solanum tuberosun L.)

Different amount of KNO3 and NH4NO3 in MS media were tested the morphogenic responses of shoot length, shoot fresh weight and multiplication rate of five potato cultivars. The growth response significantly varied with or without nitrate. The effect of NT1, NT2 and NT3 culture media on shoot growth was non-significantbut their effect on shoot fresh weight was significant. Multiplication rate (a major attributing trait was not much affected either in low or high levels of nitrate media. High nitrate media yielded higher shoot fresh weight but not significantly improved shoot length and multiplication rate