Synergistic effect of Azotobacter, actinomycetes and phosphate solubilising bacteria on growth and yield of wheat (Triticum aestivum L.)

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dc.contributor.advisorGangwar, Madhurama
dc.contributor.authorKiranpreet Kaur
dc.date.accessioned2018-01-18T04:43:11Z
dc.date.available2018-01-18T04:43:11Z
dc.date.issued2017
dc.description.abstractThe present investigation was undertaken to evaluate the synergistic effect of four isolates comprising Azotobacter, Sphingobacterium and two actinomycete isolates (Streptomyces badius and W9) for their functionality traits. All the isolates were able to produce Indoleacetic acid (IAA) and gibberellic acid (GA). Actinomycete isolate W9 showed maximum IAA (98.80 µg/ml) and GA (154.6 µg/ml). Similarly all the isolates were tested for siderophore production and phosphate solubilzation where Streptomyces badius exhibited maximum catechol type of siderophore (268 µg/ml) and hydroxamate type of siderophore (252.9 µg/ml). Sphingobacterium sp. isolate exhibited maximum phosphate solubilization activity (37.8±0.9mg/100ml). All the four isolates were screened for their hydrolytic enzymes production. Actinomycete W9 showed maximum amylolytic, chitinolytic, cellulolytic and proteolytic activity with dissolution factor 1.53 cm, 1.58cm, 1.33cm and 1.25 cm respectively. On the basis of the plant growth promoting traits, all the isolates were tested for growth promotion of wheat crop under field conditions. In both the trials, plant growth parameters like shoot and root length, fresh and dry weight of shoot and root, chlorophyll content were found to be significantly enhanced in inoculation with 100% RDF +Azotobacter + W9 over the control. In first trial (2015-16), maximum grain yield was showed by T11 (100% RDF +Azotobacter+ W9) i.e. 51.88 q/ha as compared to control (T2 & T1) was 45.41 & 40.13 (q/ha). Similar trend was observed in second trial (2016-17), where also T5 (100% RDF+ W9+ Azotobacter) showed maximum grain yield (49.5 q/ha) as compared to control (40.3 q/ha). Hence, these actinomycete isolate W9 and Azotobacter are potential candidates for enhancing plant growth that can help in the use of eco-friendly bio-fertilizers.en_US
dc.identifier.urihttp://krishikosh.egranth.ac.in/handle/1/5810039558
dc.keywordsBioinoculants, Plant Growth Promotion, Hydrolytic Enzymes, Wheat, Grain Yielden_US
dc.language.isoenen_US
dc.pages74en_US
dc.publisherPunjab Agricultural University, Ludhianaen_US
dc.research.problemSynergistic effect of Azotobacter, actinomycetes and phosphate solubilising bacteria on growth and yield of wheat (Triticum aestivum L.)en_US
dc.subMicrobiologyen_US
dc.subjectnullen_US
dc.themeSynergistic effect of Azotobacter, actinomycetes and phosphate solubilising bacteria on growth and yield of wheat (Triticum aestivum L.)en_US
dc.these.typeM.Scen_US
dc.titleSynergistic effect of Azotobacter, actinomycetes and phosphate solubilising bacteria on growth and yield of wheat (Triticum aestivum L.)en_US
dc.typeThesisen_US
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