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| Web URL(s): | http://usgatero.msu.edu/v06/n15.pdf
Last checked: 07/24/2007
Requires: PDF Reader |
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| Publication Type:
| Report |
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| Author(s): | Huang, Bingru;
Xu, Yan |
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| Author Affiliation: | Huang: Professor; Yan: Graduate Research Assistant, Department of Plant Sciences, Cook College, Rutgers University, New Brunswick, New Jersey |
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| Title: | Mechanisms controlling heat-induced leaf senescence and heat tolerance in bentgrass |
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| Source: | USGA Turfgrass and Environmental Research Online. Vol. 6, No. 15, August 1 2007, p. [1-6]. |
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| Publishing Information: | Far Hills, NJ: United States Golf Association, Green Section |
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| # of Pages: | 8 |
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| Keywords: | TIC Keywords: Senescence syndrome; Heat resistance; Heat stress; Ethylene; Abscisic acid; Cytokinins; Soil temperature; Quality; Color; Density; Chlorophyll content; Carotenoids; Agrostis stolonifera; Agrostis scabra; Turfgrass quality
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| Abstract/Contents: | "Heat stress is a primary factor causing summer bentgrass decline associated with thinning turf canopy and leaf yellowing or senescence. A growth-chamber study was conducted to examine whether heat-induced leaf senescence in bentgrass species were associated with changes in three major senescence-related hormones: ethylene, abscisic acid (ABA), and cytokinins. Plants of both species were exposed to 35°C/30°C (day/night; high temperature) or 20°C/15°C (control) for 35 days in growth chambers. The study found: Thermal bentgrass (Agrostis scabra) exhibited delayed and less severe leaf senescence, as demonstrated by lower decline in turf quality and levels of two pigments (chlorophyll and carotenoid) under high temperature compared to creeping bentgrass. Increases in ethylene and ABA, and decreases in cytokinins, were associated with heat-induced leaf senescence, and differences in heat tolerance were documented between the two bentgrass species. Ethylene accumulation was negative associated with turf quality, but cytokinin production was positively associated with turf quality. This study suggest that leaf senescence is an important factor accounting for genetic variations in heat tolerance of turfgrass species, and any approaches that can suppress endogenous ethylene or increase cytokinin levels may be used to delay foliar senescence and ultimately improve heat tolerance." |
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| Language: | English |
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| References: | 31 |
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| See Also: | Updated version appears in USGA Green Section Record, 45(5) September/October 2007, p. 18-21 R=127655 R=127655 |
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| See Also: | Other items relating to: Summertime Blues |
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| See Also: | Other Reports from this USGA research project: 2003-09-250 |
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| Note: | Summary as abstract
Pictures, color |
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| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Huang, B., and Y. Xu. 2007. Mechanisms controlling heat-induced leaf senescence and heat tolerance in bentgrass. USGA Turfgrass Environ. Res. Online. 6(15):p. [1-6]. |
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| Web URL(s):
http://usgatero.msu.edu/v06/n15.pdf
Last checked: 07/24/2007
Requires: PDF Reader |
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MSU catalog number: SB 433 .A1 A65 [online] |
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