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| Web URL(s): | http://turf.rutgers.edu/research/abstracts/symposium2005.pdf#page=43
Last checked: 11/26/2007
Requires: PDF Reader |
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| Publication Type:
| Report |
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| Content Type: | Abstract or Summary only |
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| Author(s): | He, Yali;
Liu, Xiaozhong;
Huang, Bingru |
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| Author Affiliation: | Department of Plant Biology and Pathology, Rutgers University |
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| Title: | Biochemical changes associated with leaf senescence in creeping bentgrass |
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| Section: | Poster presentations
Other records with the "Poster presentations" Section
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| Meeting Info.: | Cook College, Rutgers, NJ: January 13-14, 2005 |
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| Source: | Proceedings of the Fourteenth Annual Rutgers Turfgrass Symposium. 2005, p. 42. |
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| Publishing Information: | New Brunswick, NJ: Center for Turfgrass Science, Cook College, Rutgers, The State University of New Jersey |
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| # of Pages: | 1 |
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| Keywords: | TIC Keywords: Agrostis stolonifera; Senescence; Lipids; Quality; Temperatures; Heat stress; Proteases; Amino acid content; Proteins
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| Abstract/Contents: | "The decline in turf quality and leaf senescence often occurs for creeping bentgrass under heat stress. This study was performed to investigate changes in turf quality, membrane lipid peroxidation, total protein content, amino acid content, and protease activity for creeping bentgrass (Agrostis palustris Huds.) in response to a gradual increase in temperature and to direct heat stress. Plants were subjected to different temperatures from 20 to 40°C at 5°C intervals for 7 d at each level of temperature (indirect heat stress) or directly exposed to 40°C after 7 d of 20°C and maintained for 28d (direct heat stress) in growth chambers. During indirect heat stress, turf quality declined significantly when plants were exposed to 30°C for 7d; simultaneously, malondialdehyde (MDA) content increased and total protein content in shoots decreased significantly compared to that at 20°C. Protease activity increased when plants were transferred from 20 to 25°C and then decreased from 30 to 40°C. Amino acid content decreased with increasing temperature, beginning at 25°C up to 35°C, and then increased when temperature rose to 40°C. During direct heat stress, turf quality declined significantly and MDA content increased significantly with stress duration beginning at 14 d of treatment; total protein content decreased when plants were exposed to 40°C for 7 d; protease activity and amino acid content increased to above the initial level at 7 d of direct heat stress, and declined with longer stress duration. The results indicated that protease activity, amino acid content and total protein content were more sensative to heat stress compared to MDA content and turf quality. It is inferred that the turf quality decline and oxidative stress is related to net decrease of protein and amino of acid content in bent grass under heat stress." |
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| Language: | English |
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| References: | 0 |
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| Note: | This item is an abstract only! |
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| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
He, Y., X. Liu, and B. Huang. 2005. Biochemical changes associated with leaf senescence in creeping bentgrass. Proc. Annu. Rutgers Turfgrass Symp. p. 42. |
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| Web URL(s):
http://turf.rutgers.edu/research/abstracts/symposium2005.pdf#page=43
Last checked: 11/26/2007
Requires: PDF Reader |
| 
MSU catalog number: SB 433 .R88 |
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Digitally in TIC by file name: rutsy2005 |
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