Document Type : Research Paper
Authors
Abstract
In order to evaluate the effect of bacterial isolates on growth parameters and nutrient uptake in two varieties of maize (such as SC704 & TWC645), two experiments were separately conducted based on a completely randomized design with four replications in greenhouse of University of Vali-e-Asr in 2014. The experimental treatments consist of four isolates of fluorescent Pseudomonads (P7, P15, P24 and P29) and control (without bacteria inoculation). The results showed that the inoculation with isolates P29, P15, P7, P15, P29 and p24 respectively increased shoot dry weight (42.9 %), shoot length (23.7 %), leaf area (43.6 %), chlorophyll content (15.9 %), root dry weight (49.8 %) and root mass in variety of SC704 compared to the control (no inoculation). The application of most of the examined isolates enhanced the uptake of N, P, K, Ca and Mn in variety of SC704 significantly compared to the control. The examined isolates increased the uptake of Fe, Zn, Cu and Mn in root and shoot in variety of TWC645 significantly compared to the control. The highest uptake of Zn was observed in treatment P29 which raised the uptake of Zn in root and shoot 66.2 and 41.8 respectively in variety of TWC645 in comparison with control. All isolates had significant effect on SC704 root zinc uptake and largest increase in shoot Zn uptake was related to isolate P29 with 60.2% increase compared to the control. Overall, our observations revealed that the inoculation of maize with selected isolates had effective role on the growth and uptake of nutrients in maize.
Keywords
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