Response of newly collected Acetobacter isolates in sweet corn (Zea mays L. saccharata)
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Date
2017
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Indira Gandhi Krishi Vishwavidhyalaya, Raipur
Abstract
The present investigation was carried out in green house of Department of Agricultural Microbiology, Indira Gandhi Krishi Vishwavidyalaya, Raipur, Chhattisgarh during the year 2016-17. It comprised two experiments in order to select effective local isolate(s) of Acetobacter. (i) Sand culture experiment especially to observe N-fixing behavior of local Acetobacter isolates at premature stage of sweet corn (45 DAS) and (ii) Pot experiment especially for N accumulation, yield and yield attributing characters of sweet corn crop at maturity of crop.
Ten isolates were selected (on the basis of growth performance) from 45 local isolates collected from Raipur, Kawardha, and Rajnadgaon districts of Chhattisgarh for future screening study under controlled conditions
Plant biomass data from N-free sand culture experiment revealed that the highest shoot dry weight was associated with isolate No.18 (1.45 g/plant) followed by isolate No. 40 (1.34 g/plant). The highest N content (1.78%) was associated with Acetobacter isolates no. 16 followed to control (0.37%) by isolate No.18 (1.68%) as compared
Further, findings of pot experiment with Vertisols also revealed that highest green cob yield (28.67g/plant) of sweet corn was obtained from plants raised from seeds inoculated with isolate No 18 which was followed by isolate No. 16 (25.35 g/plant). Similarly, highest N uptake was associated with Acetobacter isolate No. 18 (329.66 mg/plant) followed by Acetobacter isolate No. 16 (301.64 mg N/plant) and minimum was observed in un-inoculated control (139.64 mg/plant).
Overall findings of both the experiments i.e. sand culture grown sweet corn and pot grown sweet corn resulted that, performance of Acetobacter isolate No.18 was found superior followed by Acetobacter isolate No.16 with most important BNF parameters related to N and biomass accumulation. Microbial dynamic study also supported that isolate No.18 and 16 were well adapted to the rhizosphere of sweet corn and both the isolates retained their highest cell counts in soil taken from sweet corn rhizosphere during pot experiment. Hence, it was concluded that isolate No 18 and 16 were most potent N2 fixing local Acetobacter isolate for sweet corn cultivation in Chhattisgarh.
Description
Response of newly collected Acetobacter isolates in sweet corn (Zea mays L. saccharata)
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