Quantification of plant hormones and synergistic effect of PGPR on yield attributing characters of mungbean (Vigna radiata (L.) Wilczek)

Abstract

The inoculation of mungbean seeds with different inoculants (Rhizobium, PGPR and PSB) alone and in combination, significantly increased the nodulation, pod formation and grain yield over uninoculated control. Nodulation, pod formation and grain yield were highest when seeds were inoculated with Rhizobium + PGPR + PSB followed by Rhizobium + PGPR, the two rabi seasons (2016 and 2017) of experimentation. In pooled analysis also, combined inoculation mungbean seeds with Rhizobium + PGPR + PSB gave significantly the highest number of nodules/plant (12.32), number of pods/plant (24.65) and grain yield (835. 27 kg ha-1). It was at par with Rhizobium + PGPR with grain yield of 831. 60 kg ha-1. Maximum IAA, IBA, GA3 and Salicylic acid content in root tissue was recorded in treatment Consortia 2 (T13) about 1.043, 0.036, 1.999, and 0.098 µg g-1 FW respectively. While treatment Consortia 1 (T12) was second highest among the different treatments with compare to control.