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FEMS Microbiol Ecol. 2016 Jun;92(6):fiw070. doi: 10.1093/femsec/fiw070. Epub 2016 Apr 5.

Multiple effects of Bacillus amyloliquefaciens volatile compounds: plant growth promotion and growth inhibition of phytopathogens.

Author information

1
Department of Plant Biology, Uppsala Biocenter, Linnéan Center for Plant Biology, Swedish University of Agricultural Sciences, SE-75007 Uppsala, Sweden.
2
Department of Food Science, University of Copenhagen, Rolighedsvej 26, DK-1958 Frederiksberg C, Denmark.
3
Department of Plant Biology, Uppsala Biocenter, Linnéan Center for Plant Biology, Swedish University of Agricultural Sciences, SE-75007 Uppsala, Sweden johan.meijer@slu.se.

Abstract

Biotic interactions through volatile organic compounds (VOC) are frequent in nature. This investigation aimed to study the role of ITALIC! BacillusVOC for the beneficial effects on plants observed as improved growth and pathogen control. Four ITALIC! Bacillus amyloliquefacienssubsp. ITALIC! plantarumstrains were screened for VOC effects on ITALIC! Arabidopsis thalianaCol-0 seedlings and ITALIC! Brassicafungal phytopathogens. VOC from all four ITALIC! Bacillusstrains could promote growth of ITALIC! Arabidopsisplants resulting in increased shoot biomass but the effects were dependent on the growth medium. Dose response studies with UCMB5113 on MS agar with or without root exudates showed significant plant growth promotion even at low levels of bacteria. ITALIC! BacillusVOC antagonized growth of several fungal pathogens ITALIC! in vitro However, the plant growth promotion efficacy and fungal inhibition potency varied among the ITALIC! Bacillusstrains. VOC inhibition of several phytopathogens indicated efficient microbial antagonism supporting high rhizosphere competence of the ITALIC! Bacillusstrains. GC-MS analysis identified several VOC structures where the profiles differed depending on the growth medium. The ability of ITALIC! Bacillusstrains to produce both volatile and soluble compounds for plant growth promotion and disease biocontrol provides examples of rhizosphere microbes as an important ecosystem service with high potential to support sustainable crop production.

KEYWORDS:

Arabidopsis thaliana; Bacillus amyloliquefaciens; biocontrol; phytopathogen; rhizosphere; volatiles

PMID:
27053756
DOI:
10.1093/femsec/fiw070
[Indexed for MEDLINE]

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