Efficacy of micronutrients in influencing growth behavior of rhizobium of pigeonpea ( cajanus cajan l. [millsp.])

Abstract

The present investigation was conducted to observe the effect of various concentrations (0.1 to 1.5 gm/100ml) of micronutrients (Zn, Mn, B, Cu, Mo, Fe) with yeast extract mannitol media on agriculturally important Rhizobium species isolated from root nodules of Cajanus cajan and to determine the effect of multi-micronutrient yeast extract mannitol media prepared of maximum growth concentrations of micronutrients on rhizobial growth. Concentrations of Zn (0.1%), Mn(0.3%), B(0.1%), and Mo(0.1%) with yeast extract mannitol media composition represented increased number of CFU against control. The growth of Rhizobium in multimicronutrient yeast extract mannitol media decreased by 25% compared to control.