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| Publication Type:
| Report |
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| Content Type: | Abstract or Summary only |
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| Author(s): | Jiang, Y.;
Huang, B. |
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| Author Affiliation: | Kansas State University |
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| Title: | Physiological mechanisms associated with drought-enhanced heat tolerance in Kentucky bluegrass |
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| Section: | Turfgrass science
Other records with the "Turfgrass science" Section
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| Meeting Info.: | Minneapolis, MN: November 5-9, 2000 |
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| Source: | 2000 Annual Meeting Abstracts [ASA/CSSA/SSSA]. 2000, p. 154. |
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| # of Pages: | 1 |
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| Publishing Information: | [Madison, WI]: American Society of Agronomy, Crop Science Society of America, Soil Science Society of America |
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| Keywords: | TIC Keywords: Heat resistance; Physiology; Drought stress; Poa pratensis; Osmotic adjustment; Root growth; Relative water content; Carbohydrates; Root weight
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| Abstract/Contents: | "Prior exposure to drought stress (drought preconditioning) may influence turfgrass tolerance to subsequent heat stress. The study was designed to examine effects of drought preconditioning on subsequent heat tolerance of Kentucky bluegrass (Poa protensis L.) associated with osmotic adjustment and root growth. Grasses were subjected to two cycles of drought in growth chambers before heat stress (35C/30C) was imposed. Drought-preconditioned plants maintained higher turf quality, leaf relative water content, and osmotic adjustment than non-preconditioned plants during heat stress. The accumulation of K+, Ca2+, P, Cl- and WSC mainly contributed to osmotic adjustment. Higher concentrations of ion solutes were observed in preconditioned than non-preconditioned plants, particularly K+. Water soluble carbohydrate content (WSC) of leaves increased under heat stress, but was higher in preconditioned than non-preconditioned plants at 14 and 21 d of heat stress. Proline content was also higher in preconditioned than non-preconditioned plants at 7 d of heat stress. Higher root dry weight and root WSC content at 40-60 cm soil layer were observed in preconditioned than non-preconditioned plants after 21 d of heat stress. Drought preconditioned plants was better tolerant to heat stress than non-preconditioned plants, which could be due to their maintenance of higher osmotic adjustment and deeper root growth." |
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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):
Jiang, Y., and B. Huang. 2000. Physiological mechanisms associated with drought-enhanced heat tolerance in Kentucky bluegrass. Annu. Meet. Abstr. p. 154. |
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