Full TGIF Record # 333365
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Web URL(s):https://scisoc.confex.com/scisoc/2023am/meetingapp.cgi/Paper/150407
    Last checked: 11/30/2023
Publication Type:
Content Type:Abstract or Summary only
Author(s):Fan, Qianqian; Jespersen, David
Author Affiliation:Fan: Presenting Author and Crop and Soil Science Department, University of Georgia, Griffin, GA; Jespersen: Crop and Soil Sciences, University of Georgia-Griffin, Griffin, GA
Title:Proteolysis via the ubiquitin-proteasome system in heat-stressed creeping bentgrass
Section:Turfgrass physiology and abiotic stress oral (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. 150407.
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 is an economically important turfgrass whose growth and performance are being challenged by more frequent and intense heat stress events. Interrupted protein metabolism, also known as change in protein content, is one typical symptom induced by heat stress. It is determined by the balance between protein degradation and protein synthesis and highly associated with many important cellular activities like photosynthesis and oxidative damage. Under heat stress, protein degradation is typically accelerated, causing a decrease in total protein content, eventually resulting in dysfunction in plant cells and impacting normal metabolic activities. One major pathway for protein degradation is via the ubiquitin-proteasome system (UPS), which utilizes polyubiquitin chains as the recognition signal to target substrate proteins to the 26S proteasome for degradation. Despite the importance, there haven't been any studies investigating the role of UPS underlying thermotolerance in any turf. Thereby, this project aimed to develop a better understanding of protein degradation under heat stress by quantifying the UPS activity and identifying the substrate proteins for the UPS pathway. Heat-tolerant and -sensitive creeping bentgrass lines were selected based on our previous research and were exposed to either control or heat stress conditions for 28 d. It was found out that heat-tolerant S11 729-10 showed better overall performance with improved physiological responses. Protein degradation was enhanced under heat stress but S11 729-10 maintained lower UPS activity, contributing to its higher protein contents, thereby greater thermotolerance. Additionally, polyubiquitinated proteins accumulated responding to heat stress, indicating enhanced protein damage. However, heat-tolerant S11 729-10 reduced the accumulation compared to heat-sensitive line, corresponding to its lower UPS activity while higher tolerance level to heat stress. Next step will be to identify the differentially expressed polyubiquitinated proteins."
Note:This item is an abstract only!
ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Fan, Q., and D. Jespersen. 2023. Proteolysis via the ubiquitin-proteasome system in heat-stressed creeping bentgrass. Agron. Abr. p. 150407.
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    Last checked: 11/30/2023
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