P. Patel1, H. Desai2, R. Krishnamurthy1* and A. Shah3

1C. G. Bhakta Institute of Biotechnology, Uka Tarsadia University, Gujarat, India.
2Main Cotton Research Station, NAU, Gujarat, India.
3Prasad Biotech, Gundlav, Valsad, Gujarat, India.


Among a collection of non-pathogenic endophytes isolated from the flower of mahua, one bacteria (Bacillus amyloliquefaciens) and two yeasts (Rhodotorula sp. and Pichia kudriavzevii) were selected based on their ability to promote greengram growth. The response of greengram for the growth, yield and nutrient uptake with the microbial inoculation with these three isolates were analyzed individually and in combination under two different field conditions. The experiment was laid out in randomized block design and revealed that single inoculants of both the yeast isolates with biocompost application found superior to recommended dose of chemical fertilizer. Further, the single inoculation of P. kudriavzevii and Rhodotorula sp. application recorded 31.80 % and 26.93 % more economical and 15.02 % and 12.49 % higher stover yield, respectively than sole biocompost application. The yeast isolates, P. kudriavzevii and Rhodotorula sp. recorded 1.31 % and 0.15 % increase in harvest index compared to chemical fertilizer and 10.30 % and 9.04 % increase to a sole biocompost application, respectively. Data showed that the combination of the bacteria and yeast inoculums had no additional effects with respect to their single inoculation, but showed superior performance compared to uninoculated controls. This study concluded that suitable microbial inoculation in with compost enhances yield and nutrient uptake by the greengram. Thus, plant growth promoting yeast isolates as their single inoculation could be explored for increasing productivity and economic yield in green gram production.

Keywords: Greengram, Bacillus amyloliquefaciens, Rhodotorula sp., Pichia kudriavzevii.