Full TGIF Record # 333565
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Web URL(s):https://scisoc.confex.com/scisoc/2023am/meetingapp.cgi/Paper/149244
    Last checked: 12/08/2023
Publication Type:
Content Type:Abstract or Summary only
Author(s):Rossi, Stephanie; Huang, Bingru
Author Affiliation:Rossi: Presenting Author and Plant Biology and Pathology, Rutgers University, New Brunswick, NJ; Huang: Rutgers University, New Brunswick, NJ
Title:Physiological effects of a protease inhibitor on bentgrass species differing in heat tolerance
Section:Turfgrass science oral II
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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. 149244.
Publishing Information:[Madison, Wisconsin]: [American Society of Agronomy, Crop Science Society of America, and Soil Science Society of America]
# of Pages:1
Abstract/Contents:"Heat stress is a primary abiotic stress that reduces the quality and performance of bentgrasses (Agrostis sp.), cool-season turfgrasses, which undergo premature leaf senescence due to their sensitivity to high temperatures. During leaf senescence, proteins are markedly degraded, especially those involved in the light-harvesting and carboxylation processes of photosynthesis as well as pigments, such as chlorophyll, which leads to the associated yellowing of leaves. Protease inhibitors may alter the physiological indicators of photosynthetic health in cool-season turfgrasses under heat stress. The objectives of this study were to examine the physiological effects exogenous application of the serine-class protease inhibitor, aprotinin, has on heat-induced leaf senescence in two bentgrass species differing in heat tolerance and to determine which physiological traits are most responsive to aprotinin under heat stress. Heat-sensitive creeping bentgrass (A. stolonifera 'Penncross') and heat-tolerant thermal bentgrass (A. scabra 'NTAS') were subjected to heat stress (38/33 °C, day/night) or non-stress control (22/17 °C, day/night) temperatures for 56 d in controlled-environment growth chambers and were foliar-treated with 10 μM aprotinin, a serine class protease inhibitor, every 7 d. Turf quality, photochemical parameters associated with photosynthetic health, and chlorophyll a and b content were elevated in thermal bentgrass as compared to the heat-sensitive creeping bentgrass. Aprotinin treatment significantly promoted these properties in both bentgrass species with respect to their untreated controls. These findings suggest that the heat tolerance of certain turfgrass species may be attributed to their ability to retain proteins critical to light-harvesting, carbon fixation, and chlorophyll metabolism under heat stress. Additionally, exogenous application of serine class protease inhibitors may suppress heat-induced leaf senescence by delaying the hydrolysis of proteins involved in these processes. Future identification of the specific proteases and proteins that can be targeted to control heat tolerance will allow for the development of novel treatments for controlling heat stress."
This item is an abstract only!
ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Rossi, S., and B. Huang. 2023. Physiological effects of a protease inhibitor on bentgrass species differing in heat tolerance. Agron. Abr. p. 149244.
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    Last checked: 12/08/2023
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