Sigma 54-dependent transcriptional activators such as Escherichia coli NtrC, Rhizobium meliloti NifA, and Rhizobium leguminosarum DctD share similar central and carboxy-terminal domains but differ in the structure and function of their amino-terminal domains. We have deleted the amino-terminal and carboxy-terminal domains of R. leguminosarum DctD and have demonstrated that the central domain of...

A reduction in the viability of cowpea rhizobia was observed when Rhizobium trifolii IARI and cowpea Rhizobium strain 3824 were inoculated together in soil. The reduction in number of cowpea rhizobia in soil was found to be associated with the reduction in number of nodules per plant and retardation in plant growth. An antimicrobial substance was isolated from R. trifolii which, on electron mic...

INTRODUCTION ..................................................................................... 444 LEGHEMOGLOBIN ................................................................................. 445 Occurrence, Purification, Sequence Analysis ................................................ 445 Biosynthesis and its Control; Genetic Origin ................................................ 446...

A procedure was designed which enabled the detection of ex planta nitrogenase activity in the fast-growing cowpea Rhizobium strain IHP100. Nitrogenase activity in agar culture under air occurred at a rate similar to that found for Bradyrhizobium strain CB756 but lower than that for Rhizobium strain ORS571. Hybridization studies showed that both nod and nif genes were located on a 410-kilobase S...

The pot experiment entitled “Effect of integrated application bio-fertilizer and soil amendments on Growth parameters Groundnut (Arachis hypogaea L.)’’ was conducted at the Research Farm School Agriculture, ITM University, during kharif season 2022. experimental field sandy loam, having a pH 8.13, EC 0.54 ds m-1, organic carbon 0.40%, available N, P, K 180, 11.09 283.40 kg ha-1 respectively exc...

1 Hudeiba Research Station (ARC), P. O. Box 31, Eddamer, Sudan 2 National Centre for Research, Environment and Natural Resources Research Institute (ENRRI) P. O. Box 6096 Khartoum, Sudan *Corresponding Author’s E-mail: [email protected] The performance of two chickpea in response to three Rhizobium strains was evaluated. The main objective of the work was to study the effect of inoculation ...