Indian Society of Pulses Research and Development (ISPRD)
Abstract
In an attempt to identify plant growth-promoting (PGP)
actinomycetes other than Streptomyces sp., from rhizosphere
soils of chickpea and sorghum, a total of 37 actinomycetes
were isolated and evaluated for their PGP traits. Of which,
one isolate BCA-696 was found to produce PGP traits
including indole acetic acid (IAA), siderophore, cellulase,
lipase, protease, chitinase, hydrocyanic acid and -1,3-
glucanase. BCA-696 was found to tolerate wide range of pH,
temperature, NaCl concentrations and fungicides. BCA-696
was identified as Amycolatopsis sp. in 16S rDNA analysis.
On chickpea, under greenhouse and field conditions, BCA-
596 enhanced the root length, root volume, shoot weight,
root weight, nodule number, pod number, seed weight, stover
yield and grain yield over the un-inoculated control. BCA-
696 also enhanced PGP traits on sorghum, under field
conditions, including the leaf area, stem weight, root weight,
plant weight, grain yield and stover yield over the uninoculated
control. The rhizosphere soils of both chickpea
and sorghum were also found to enhance total N, available P
and % organic C in BCA-696 treated plots over un-inoculated
control plots. BCA-696 was found to colonize both chickpea
and sorghum roots in scanning electron microscope analysis.
This is the first report on the role of Amycolatopsis sp. in
PGP on chickpea and sorghum
