Full TGIF Record # 246948
Item 1 of 1
DOI:10.1016/j.envexpbot.2012.07.008
Web URL(s):http://www.sciencedirect.com/science/article/pii/S0098847212001591
    Last checked: 07/15/2014
    Access conditions: Item is within a limited-access website
Publication Type:
i
Refereed
Author(s):Zhou, Yi; Lambrides, Christopher J.; Fukai, Shu
Author Affiliation:The University of Queensland, School of Agriculture and Food Sciences, Australia
Title:Drought resistance of bermudagrass (Cynodon spp.) ecotypes collected from different climatic zones
Source:Environmental and Experimental Botany. Vol. 85, January 2013, p. 22-29.
Publishing Information:Elsevier
# of Pages:8
Keywords:TIC Keywords: Climatic factors; Cultivar evaluation; Cynodon dactylon; Dehydration avoidance; Drought resistance; Ecotypes; Regional variation; Stomatal conductance; Variety trials
Abstract/Contents:"The objectives of this paper were to (1) evaluate drought resistance of a large number of bermudagrass ecotypes collected from different climatic zones of regional Australia and compare their performance to commercial cultivars, (2) describe the mechanisms of drought resistance observed, and (3) investigate the relationship between geographic origins of the ecotypes and their drought resistance. Fifty-two genotypes of bermudagrass were evaluated in two field experiments using lysimeters 40 cm deep. The grasses were grown in well-watered conditions and then a drought treatment was imposed by withholding water and excluding rainfall using a portable rain-out shelter. Two criteria were used to select for drought resistance, i.e. survival period (SP), defined as the number of days after water was withheld to the stage when 100% leaf firing had occurred and Days50 defined as the days required to reach 50% green cover. These experiments suggested that genotypes with superior drought resistance had lower stomatal conductance in the earlier phases of the dry-down period as suggested by less water use and higher canopy temperature depression. Lower water use during the early stage of dry-down resulted in more soil available water at the end of the drought period to extend green-leaf cover. There was no correlation between root dry matter and survival period/Days50. We also found some ecotypes performed better in drought conditions than popular commercial cultivars. There was no relationship between drought resistance and geographic origins, suggesting that drought resistant ecotypes could be obtained from any climatic zone sampled in this study."
Language:English
References:41
Note:Equations
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ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Zhou, Y., C. J. Lambrides, and S. Fukai. 2013. Drought resistance of bermudagrass (Cynodon spp.) ecotypes collected from different climatic zones. Environ. Exp. Bot. 85:p. 22-29.
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DOI: 10.1016/j.envexpbot.2012.07.008
Web URL(s):
http://www.sciencedirect.com/science/article/pii/S0098847212001591
    Last checked: 07/15/2014
    Access conditions: Item is within a limited-access website
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