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Short Communication Synergistic effect of rhizobia and plant growth promoting rhizobacteria on the growth and nodulation of lentil seedlings under axenic conditions

Author(s): Muhammad Zafar-ul-Hye | Maqshoof Ahmad | Sher Muhammad Shahzad

Journal: Soil & Environment
ISSN 2074-9546

Volume: 32;
Issue: 1;
Start page: 79;
Date: 2013;
Original page

Keywords: ACC-deaminase | co-inoculation | lentil | nodulation

Plant growth promoting rhizobacteria (PGPR) containing ACC-deaminase in combination with rhizobia can improve the growth and nodulation in plants by suppressing the endogenous level of ethylene. In the present study, ten strains, each of PGPR and rhizobia from the previously screened cultures were tested for their effect as co-inoculants on growth and nodulation of lentil in growth pouches under axenic conditions. Results showed that most of the combinations improved the lentil growth as compared to the un-inoculated control. Maximum increase in shoot length (1.87 fold), root length (1.97 fold) and total biomass (1.98 fold) over the un-inoculated control was observed in the treatment where the lentil seedlings were inoculated with the combination Z24P10. Co-inoculation also improved the nodulation in lentil and the maximum number of nodules plant-1 (24 nodules) were observed in the combination Z22P10. However, there was no nodulation in few combinations. It is concluded that the co-inoculation with rhizobia and PGPR containing ACC-deaminase has improved the growth and nodulation in lentil under axenic conditions and the selected combinations may be evaluated in pot and field trials
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