Effect of combined inoculation of Azospirillum and Rhizobium on nodulation and N2-fixation of winged bean and soybean

Response of Faba bean (Vicia faba L.) to combined inoculation with Azotobacter and Rhizobium leguminosarum bv. viceae

“…Apart for the general role of these compounds in growth-promotion of plants by free-living bacteria, phytohormones and vitamins have also been linked with the favourable in¯uence of combined inoculation of legumes with Rhizobium plus Azospirillum or Pseudomonas strains (Iruthayathas et al, 1983;Derylo and Skorupska, 1993;Okon and Itzigsohn, 1995). On the other hand, local Azotobacter strains DR25 and DR26 were mainly chosen for inoculation of V. faba because of their high ARA values in pure culture.…”

“…Many papers have reported enhancement of nodulation and growth of a wide variety of forage and grain legumes, due to a positive interaction between Rhizobium species and diazotrophic soil bacteria of the genus Azospirillum (Iruthayathas et al, 1983;Plazinsky and Rolfe, 1985;Sarig et al, 1986;Yahalom et al, 1987;del Gallo and Fabbri, 1991). Azotobacter (particularly A. chroococcum) occurs widely in agricultural soils of temperate regions with almost neutral pH, and can be easily found in association with cereal and legume rhizospheres (Kole et al, 1988;Martõ Ânez-Toledo et al, 1991).…”

Mechanism of root growth and promotion of nodulation in vegetable soybean byAzospirillum Brasilense

“…In addition to increase root growth in non-legumes (4,5,13) and legumes (14) by Azospirillum application, it also enhances biological nitrogen fixation activity (15,16). Encouraging but inconsistent results on increased nodulation, acetylene reduction activity, nutrient uptake, and yield have been reported in different legumes (6,7,17). Besides inhibition of nodulation, decreased infection thread developments were also reported in white clover (18) and Medicago (19) when co-inoculated with Azospirillum.…”

Potential of Rhizosphere Bacteria for Improving Rhizobium-Legume Symbiosis

“…japonicum E109 (Cassan et al 2009 ). Numerous other studies have also demonstrated the enhancement of nodulation and growth of a wide array of grain legumes because of positive interaction between Rhizobium species and bacteria of the genus Azospirillum (Iruthayathas et al 1983 ;Plazinski and Rolfe 1985 ;Yahalom et al 1987 ;del Gallo and Fabbri 1991 ;Hamaoui et al 2001 ). Increased nodulation in legumes following inoculation with Azospirillum has been attributed to the secretion of nod-gene-inducing fl avonoids by the roots (Burdman et al 1996 ;Volpin et al 1996 ).…”