“Plant growth promoting activity of IAA and GA3 producing Azospirillum spp. and Acetobacter spp. on Maize (Zea mays L.)”
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Date
2009
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Anand Agricultural University, Anand
Abstract
Selection and screening for plant growth hormones production by
efficient strains of nitrogen fixers are important steps to optimize high crop
yield and improve the sustainability of the ecosystem. The objective of this
study was to screen Azospirillum spp. and Acetobacter spp. from the natural
endophytic bacterial population for growth hormone production which promote
plant growth. In order to select the most efficient isolates, qualitative and
quantitative estimation of IAA was done by Salkowski reagent under laboratory
condition. Isolates screened, produced indole-3-acetic acid (IAA) ranging in
concentration from 5 to 11 μg/ml. Also, screening was done using in situ
whatman paper method which confirmed the positive effect of tryptophan on
IAA production
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Keywords
Agricultural Microbiology, Analysis