Full TGIF Record # 93002
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Web URL(s):https://turf.rutgers.edu/research/abstracts/symposium2004.pdf#page=42
    Last checked: 02/06/2017
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Publication Type:
i
Report
Content Type:Abstract or Summary only
Author(s):DaCosta, Michelle; Huang, Bingru
Author Affiliation:Department of Plant Biology and Pathology, Rutgers University
Title:Physiological responses of creeping and velvet bentgrass to drought stress
Section:Posters
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Meeting Info.:Cook College, Rutgers, NJ: January 15-16, 2004
Source:Proceedings of the Thirteenth Annual Rutgers TurfgrassSymposium. 2004, p. 41.
Publishing Information:New Brunswick, NJ: Center for Turfgrass Science, Cook College, Rutgers, The State University of New Jersey
# of Pages:1
Keywords:TIC Keywords: Agrostis canina; Agrostis stolonifera; Comparisons; Cultivar evaluation; Drought resistance; Drought stress; Physiological responses; Water use
Abstract/Contents:"Bentgrass species are among the least studied cool-season grasses in terms of drought tolerance, and thus basic knowledge into water use requirements and relative drought tolerance of these increasingly utilized species is greatly needed. The objectives of this growth chamber study were to examine and compare drought tolerance and water use between creeping (Agrostis palustris) and velvet (Agrostis canina) bentgrasses in response to drought stress, and to determine major physiological factors associated with drought tolerance. Plants were subjected to two soil moisture treatments: (i) well-watered control: watered to field capacity 3x per week; (ii) drought stressed; irrigation completely withheld from entire soil profile. General drought performance under different soil moisture treatments was evaluated with visual turf quality ratings based on color, density, and leaf wilting. Turf water use was determined by measuring soil moisture depletion using time domain relectometry (TDR) as well as leaf relative water content. Changes in photosynthesis, leaf osmotic adjustment, and rooting were examined to determine major physiological factors associated with drought tolerance. Single leaf photosynthesis rates decreased similarly between creeping and velvet bentgrasses, and so did not seem to account for differnces observed between non-stressed and stressed plants. Generally, velvet bentgrass plants were less sensitive to drought stress compared to creeping bentgrass, as manifested by maintaining better quality and prolonged leaf turgidity. Enhanced drought performance in velvet bentgrass was associated with higher soil moisture content and leaf water content, indicating that velvet bentgrasses utilized water more slowly. Different rates of water consumption could be related to root distribution: creeping bentgrasses had a greater number of roots in upper soil layers compared to velvet bentgrasses prior to initiation of drought, which could account for increased water use and faster depletion of available water supplies. Osmotic adjustment (OA) increased significantly with drought for both species, but the extent of OA was greater in velvet compared to creeping bentgrass. Greater leaf OA could account for enhanced maintenance of water content and leaf turgidity in velvet bentgrass plants, thus contributing to greater drought tolerance. Further work is in progress to determine the importance of specific compounds for the contribution of OA."
Language:English
References:0
See Also:Other items relating to: Disasters - Drought
Note:This item is an abstract only!
ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
DaCosta, M., and B. Huang. 2004. Physiological responses of creeping and velvet bentgrass to drought stress. Proc. Annu. Rutgers Turfgrass Symp. p. 41.
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Web URL(s):
https://turf.rutgers.edu/research/abstracts/symposium2004.pdf#page=42
    Last checked: 02/06/2017
    Requires: PDF Reader
    Notes: Item is within a single large file
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MSU catalog number: SB 433 .R88
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