Co-inoculation of Dietzia natronolimnaea and Glomus intraradices with vermicompost positively influences Ocimum basilicum growth and resident microbial community structure in salt affected low fertility soils

•Bio-inoculants improve Ocimum basilicum growth under salinity stress in both glasshouse and field conditions.•Microbes and organic manure amendment altered bacterial but not fungal community structure.•Rhizosphere fungal communities show a heterogeneous effect of bio-inoculants.•Addition of bio-ino...

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Published in:Applied soil ecology : a section of Agriculture, ecosystems & environment ecosystems & environment, 2016-04, Vol.100, p.211-225
Main Authors: Bharti, Nidhi, Barnawal, Deepti, Wasnik, Kundan, Tewari, Shri Krishna, Kalra, Alok
Format: Article
Language:English
Subjects:
AM fungi
bacterial communities
community structure
crop production
Dietzia
field experimentation
fungal communities
Glomus intraradices
greenhouses
mycorrhizal fungi
Ocimum
Ocimum basilicum
PGPR
plant growth
plant growth-promoting rhizobacteria
restriction fragment length polymorphism
rhizosphere bacteria
Salinity
salt stress
soil
soil fertility
soil quality
TRFLP
vermicomposts
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Summary:•Bio-inoculants improve Ocimum basilicum growth under salinity stress in both glasshouse and field conditions.•Microbes and organic manure amendment altered bacterial but not fungal community structure.•Rhizosphere fungal communities show a heterogeneous effect of bio-inoculants.•Addition of bio-inoculants has a positive impact on indigenous rhizosphere microbes. Plant growth promoting microorganisms (rhizospheric bacteria and mycorrhizal fungi) provide a sustainable alternative to enhanced crop production along with improved soil health in varying environments. The present study was aimed to elucidate the alteration occurring in innate rhizospheric microbial communities associated with inoculation of AM fungi and PGPR along with organic manure and the resulting improved plant growth under naturally occurring salt stress. The results demonstrate improved growth of Ocimum basilicum CIM-Saumya plants applied with bio-inoculants (Dietzia natronolimnaea STR1 and Glomus intraradices (Gi)) along with organic manure (vermicompost) under salt stressed soil conditions in both glasshouse and field trials. Rhizospheric microbial (bacteria and fungi) community structure as analyzed through terminal restriction fragment length polymorphism (TRFLP) demonstrated a positive effect of microbial inoculation on the indigenous microbial community structure. A notable impact of combined inoculations on the bacterial community was observed in comparison to single applications of either of the bio-inoculants; however, this effect was not iterated in fungal community structure.
ISSN:0929-1393
1873-0272
DOI:10.1016/j.apsoil.2016.01.003