Enhancement of Plant Growth by Volatile Compounds Produced by Bacillus cereus C1L
Date Issued
2009
Date
2009
Author(s)
Yang, Hsiu-Ping
Abstract
The biocontrol strain, Bacillus cereus C1L, was isolated from the rhizosphere of Lilium formosanum in Hualien, Taiwan. Application of B. cereus C1L effectively decreased disease level of lily leaf blight and corn leaf blight in the fields. The plant growth-promoting functions of strain C1L, to increase plant height, leaf width and length, and plant fresh and dry weight, were demonstrated on Arabidopsis thaliana in greenhouse assay. Plant tissue culture methods with I-plates revealed that volatile compounds of B. cereus C1L could increase fresh weight of A. thaliana, and the dry weight, leaf area, and root length of Nicotiana tobacum. In addition, volatile compounds released from strain C1L showed inhibitory effect on mycelial growth of Alternaria brassicicola, Botrytis cinerea, and Botrytis elliptica. The volatile compounds produced by strain C1L showed five peaks in components analysis by gas chromatography-mass spectrometry. One of them was identified as dimethyl disulfide (DMDS). Application of DMDS could increase dry weight, leaf area, and root length of N. tobacum; however, there was no growth-enhancing effect on A. thaliana and no inhibitory effect on the growth of three tested fungi as exposed to DMDS. The contributions of this study are data collection for plant growth promotion by strain C1L and the finding of the volatile compound effective on plant growth promotion.
Subjects
Bacillus cereus
Arabidopsis thaliana
Nicotiana tobacum
gas chromatography-mass spectrometry
volatile compounds
dimethyl disulfide
DMDS
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