Full TGIF Record # 324946
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Web URL(s):https://scisoc.confex.com/scisoc/2022am/meetingapp.cgi/Paper/143060
    Last checked: 01/25/2023
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Publication Type:
Content Type:Abstract or Summary only
Author(s):Kaur, Charanpreet; Ervin, Erik; Bais, Harsh P.; Emerson, John
Author Affiliation:Kaur: Presenting Author and University of Delaware; Ervin, Bais, and Emerson: University of Delaware
Title:Immune system responses of creeping bentgrass putting greens to plant health products
Section:Turfgrass Physiology, Molecular Biology, Microbiome, and Genetics Poster (includes student competition)
Other records with the "Turfgrass Physiology, Molecular Biology, Microbiome, and Genetics Poster (includes student competition)" Section

C05 turfgrass science
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Meeting Info.:Baltimore, Maryland: November 6-9, 2022
Source:ASA, CSSA, SSSA International Annual Meeting. 2022, p. 143060.
Publishing Information:[Madison, Wisconsin]: [American Society of Agronomy, Crop Science Society of America, and Soil Science Society of America]
# of Pages:1
Abstract/Contents:"Creeping bentgrass (Agrostis stolonifera L.) is widely used on temperate golf course putting greens because of its aggressive growth habit and ability to withstand low mowing heights. However, putting green quality often declines in response to sustained summer heat and disease pressure. Plant health product (PHP) applications may have physiological effects and enhance defense systems against various biotic and abiotic stresses. The objectives of the study were to determine morphological and physiological effects of seasonal PHP programs, alone and in a five-way tank mix, on creeping bentgrass and to determine treatment effects on in-vitro antifungal activity and expression of pathogenesis-related (PR) genes. The study was conducted on a USGA specification putting green in northern Delaware. The treatments acibenzolar-S-methyl (50% WSP), kelp extract (0-0-1), Bacillus subtilis UD1022, al-tris phosphonate (80% WP), trinexapac-ethyl (11.3%), five-product tank mix, and untreated control were applied at label rates every two weeks from May to September of 2021 and 2022. Turfgrass quality and chlorophyll content were estimated every two weeks. Plant and soil nutrient contents, and root density were estimated at the beginning, mid, and end of the season. B. subtilis UD1022 colonization of roots was observed via confocal microscopy and quantified as colony forming units. PHPs were also tested in-vitro for antifungal activity against dollar spot pathogen Clarireedia spp. Wild type B. subtilis UD1022 and its mutant sfp- showed highest antagonism against dollar spot pathogen Clarireedia spp. with inhibition rate of 17.2 % and 18.4%, respectively and mycelial growth of 23.9 mm and 23.8 mm, respectively. Plant health products may induce the expression of PR genes and confer disease resistance to creeping bentgrass. Disease and drought stress suppression by exogeneous application of plant health products may reduce fungicide and irrigation inputs on creeping bentgrass putting greens."
Note:This item is an abstract only!
Updated version appears in ASA, CSSA, SSSA International Annual Meeting, 2023, p. 150629, R=333407. |r 333407
ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Kaur, C., E. Ervin, H. P. Bais, and J. Emerson. 2022. Immune system responses of creeping bentgrass putting greens to plant health products. Agron. Abr. p. 143060.
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