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| DOI: | 10.3732/ajb.1600176 |
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| Web URL(s): | http://www.amjbot.org/content/103/11/1890.full.pdf
Last checked: 07/07/2017
Requires: PDF Reader
Access conditions: Item is within a limited-access website
http://www.amjbot.org/content/103/11/1890.full
Last checked: 07/12/2017
Access conditions: Item is within a limited-access website |
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| Publication Type:
| Refereed |
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| Author(s): | Kong, Ricky S.;
Henry, Hugh A. L. |
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| Author Affiliation: | Henry: Department of Biology, University of Western Ontario, London, ON, Canada |
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| Title: | Prior exposure to freezing stress enhances the survival and recovery of Poa pratensis exposed to severe drought |
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| Source: | American Journal of Botany. Vol. 103, No. 11, November 2016, p. 1890-1896. |
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| Publishing Information: | Columbus, Ohio: Botanical Society of America |
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| # of Pages: | 7 |
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| Related Web URL: | http://www.amjbot.org/content/103/11/1890
Last checked: 07/11/2017
Notes: Abstract only |
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| Keywords: | TIC Keywords: Acclimatization; Cold stress; Drought recovery; Drought stress; Physiological responses; Poa pratensis; Relationships; Soil moisture
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| Abstract/Contents: | "PREMISE OF THE STUDY: Both freezing and drought cause cellular dehydration, and they elicit similar increases in protective compounds, which suggests that these stresses could potentially interact. We examined whether the physiological changes that occur in response to freezing in the fall and spring could affect subsequent survival and growth after summer drought. METHODS: We froze Poa pratensis tillers in the late fall, early spring, or late spring at 0, -5, or -10°C for 3 d and then subjected them to no drought (-0.025 MPa), moderate drought (-0.140 MPa), or severe drought (-0.250 MPa) for 3 wk in the summer. We quantified survival and total biomass after a 3-wk recovery period, and we determined leaf soluble sugar concentrations before and then 0, 30, and 55 d after freezing. KEY RESULTS: For survival and biomass, there were significant interactions between freezing and drought. Spring frozen tillers had the highest biomass and survival following severe drought, whereas fall freezing did not significantly increase the biomass of tillers following the severe drought. Increased drought tolerance after spring freezing did not appear to be associated with increased soluble sugar content, given that the freezing effects on leaf glucose, fructose, and sucrose content were absent 55 d post freezing. CONCLUSIONS: Our results demonstrate that multiple stresses that occur over different seasons can interact; this interaction is highly relevant to herbaceous species in northern temperate regions that are experiencing more intense and frequent stress as a result of changes in snow cover and extreme climatic events." |
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| Language: | English |
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| References: | 46 |
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| Note: | Graphs |
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| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Kong, R. S., and H. A. L Henry. 2016. Prior exposure to freezing stress enhances the survival and recovery of Poa pratensis exposed to severe drought. Amer. J. Bot. 103(11):p. 1890-1896. |
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| DOI: 10.3732/ajb.1600176 |
| Web URL(s):
http://www.amjbot.org/content/103/11/1890.full.pdf
Last checked: 07/07/2017
Requires: PDF Reader
Access conditions: Item is within a limited-access website
http://www.amjbot.org/content/103/11/1890.full
Last checked: 07/12/2017
Access conditions: Item is within a limited-access website |
| 
MSU catalog number: QK 1 .B345 |
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