Full TGIF Record # 333424
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Web URL(s):https://scisoc.confex.com/scisoc/2023am/meetingapp.cgi/Paper/150475
    Last checked: 12/01/2023
Publication Type:
Content Type:Abstract or Summary only
Author(s):Kaur, Charanpreet; Ervin, Erik; Bais, Harsh P.
Author Affiliation:Kaur: Presenting Author and Agricultural Hall, University of Delaware, Newark, DE; Ervin and Bais: University of Delaware
Title:Plant growth promotion and dollar spot disease suppression by PGPR Bacillus subtilis strain UD1022 in creeping bentgrass
Section:Turfgrass physiology, molecular biology, breeding, genetic and microbiome poster (includes student competition)
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C05 turfgrass science
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Meeting Info.:St. Louis, Missouri: October 29-November 1, 2023
Source:ASA, CSSA, SSSA International Annual Meeting. 2023, p. 150475.
Publishing Information:[Madison, Wisconsin]: [American Society of Agronomy, Crop Science Society of America, and Soil Science Society of America]
# of Pages:1
Abstract/Contents:"Plant Growth Promoting Rhizobacteria (PGPR) have gained significant attention in recent years due to their multifaceted benefits in agriculture. Dollar spot is an economically important foliar disease of turfgrass caused by Clarireedia spp. Increased use of chemical fertilizers and fungicides for growth promotion and disease management has possible negative effects on the environment and human health. The quest for eco-friendly alternatives to fungicides is driving the development of new biological strategies for managing dollar spot. In the present study, an investigation on roles of the PGPR Bacillus subtilis strain UD1022 (hereafter UD1022) on growth promotion and dollar spot disease suppression was conducted. Controlled environment biomass experiment revealed growth promotional effects of UD1022. UD1022 significantly increased shoot and root dry weights by 156.7% and 182.9% as compared to control. In vitro assays revealed that UD1022 has significant inhibitory effects against the mycelial growth of C. jacksonii. Of all the treatments, wild type UD1022 and a non-ribosomal peptide mutant (sfp-) showed potential antagonism against C. jacksonii with inhibition rate of 17.2 % and 18.4%, respectively. All the mutants of UD1022 except spo0A- showed varying but significant inhibition of the fungal pathogen suggesting that spo0A gene may be directly involved in the antagonism against C. jacksonii. Bacterial volatile compounds (BVCs) of UD1022 may not be involved in antagonism as no fungal inhibition was observed in the indirect assay using split petri plates. The creeping bentgrass field inoculation trial further validated biocontrol potential of UD1022 in dollar spot disease suppression. The results indicate that UD1022 could be used as a bio-fertilizer and biocontrol agent for the management of dollar spot and its application could reduce the amount of fertilizer and fungicide applications required in creeping bentgrass."
Note:This item is an abstract only!
ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Kaur, C., E. Ervin, C. Kaur, and H. P. Bais. 2023. Plant growth promotion and dollar spot disease suppression by PGPR Bacillus subtilis strain UD1022 in creeping bentgrass. Agron. Abr. p. 150475.
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    Last checked: 12/01/2023
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