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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
agricultural and biological sciences
GC-MS SPME profiling of rhizobacterial volatiles reveals prospective inducers of growth promotion and induced systemic resistance in plants
Phytochemistry, Volume 67, No. 20, Year 2006
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Description
Chemical and plant growth studies of Bacilli strains GB03 and IN937a revealed that the volatile components 2,3-butanediol and acetoin trigger plant growth promotion in Arabidopsis. Differences in growth promotion when cytokinin-signaling mutants are exposed to GB03 versus IN937a volatiles suggest a divergence in chemical signaling for these two bacterial strains. To provide a comprehensive chemical profile of bacterial volatiles emitted from these biologically active strains, headspace solid phase microextraction (SPME) coupled with software extraction of overlapping GC-separated components was employed. Ten volatile metabolites already reported from GB03 and IN937a were identified as well as 28 compounds not previously characterized. Most of the newly identified compounds were branched-chain alcohols released from IN937a, at much higher levels than in GB03. Principal component analysis clearly separated GB03 from IN937a, with GB03 producing higher amounts of 3-methyl-1-butanol, 2-methyl-1-butanol and butane-1-methoxy-3-methyl. The branched-chain alcohols share a similar functional motif to that of 2,3-butanediol and may afford alternative structural patterns for elicitors from bacterial sources. © 2006 Elsevier Ltd. All rights reserved.
Authors & Co-Authors
Farag, Mohamed Ali
Egypt, Cairo
Faculty of Pharmacy
Ryu, Choongmin
South Korea, Daejeon
Korea Research Institute of Bioscience and Biotechnology
Sumner, Lloyd W.
United States, Ardmore
Samuel Roberts Noble Foundation
Paré, Paul W.
United States, Lubbock
Texas Tech University
Statistics
Citations: 336
Authors: 4
Affiliations: 4
Identifiers
Doi:
10.1016/j.phytochem.2006.07.021
ISSN:
00319422
Study Design
Cohort Study