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| DOI: | 10.21273/JASHS.128.3.0349 |
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| Web URL(s): | https://journals.ashs.org/jashs/view/journals/jashs/128/3/article-p349.xml?rskey=HoTTqY
Last checked: 11/19/2019
Requires: PDF Reader |
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| Publication Type:
| Refereed |
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| Author(s): | Wang, Zhaolong;
Huang, Bingru |
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| Author Affiliation: | Wang: Postdoctoral Research Associate, Department of Plant Pathology...; and Huang: Associate Professor, Department of Plant Biology and Pathology, Rutgers University, New Brunswick, New Jersey |
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| Title: | Genotypic variation in abscisic acid accumulation, water relations, and gas exchange for Kentucky bluegrass exposed to drought stress |
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| Section: | Environmental stress physiology
Other records with the "Environmental stress physiology" Section
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| Source: | Journal of The American Society for Horticultural Science. Vol. 128, No. 3, May 2003, p. 349-355. |
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| Publishing Information: | Alexandria, VA: American Society for Horticultural Science |
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| # of Pages: | 7 |
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| Keywords: | TIC Keywords: Genotypes; Variations; Abscisic acid; Gas exchange; Drought; Drought stress; Physiology; Drought resistance; Poa pratensis; Relative water content
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| Cultivar Names: | Midnight; A82-204; Brilliant; RSP |
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| Abstract/Contents: | "Drought is a major limiting factor for turfgrass growth. Understanding genetic variations in physiological responses of turfgrass to drought stress would facilitate breeding and management programs to improve drought resisitance. This study was designed to evaluate responses of abscisic acid (ABA) accumulation, water relations, and gas exchange to drought stress in four Kentucky bluegrass (Poa pratensis L.) cultivars differing in drought resistance. Plants of `Midnight' and `A82-204' (drought resistant) and `Brilliant' and `RSP' (drought susceptible) were grown under well-watered (control) or drought stress conditions for 25 days in growth chambers. Turf quality, leaf water potential (Ψleaf), relative water content (RWC), leaf net photsynthesis rate (Pn), and stomatal conductance (gs) declined, while electrolyte leakage (EL) increased during drought progression in all cultivars. The magnitudes of the change in these parameters were greater for `RSP' and `Brilliant' than for `Midnight' and `A82-204'. Leaf ABA content in `RSP' and `Brilliant' increased sharply after 2 days of stress to as much as 34 times the control level at 10 days of drought. Leaf ABA content in `Midnight' and `A82-204' also increased with drought, but to a lesser extent than in the other two cultivars. Leaf ABA level was negatively correlated with Ψleaf and gs. `A82-204' had a significantly lower ABA accumulation rate with changes in Ψleaf during drought compared to `Midnight', `RSP' and `Brilliant'; however, no differences in ABA accumulation rate were detected among the latter three cultivars. In addition, leaf gs was more sensitive to changes in ABA accumulation in `Midnight' and `A82-204' than in `RSP' and `Brilliant'. These results demonstrated that drought tolerant cultivars of Kentucky bluegrass were characterized by lower ABA accumulation and less severe decline in Ψleaf, Pn, gs, and turf quality during drought stress than drought sensitive cultivars. Drought tolerance of Kentucky bluegrass could be related to sensitivity of stomata to endogenous accumulation of ABA under drought stress conditions." |
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| Language: | English |
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| References: | 51 |
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| See Also: | Other items relating to: Disasters - Drought |
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| Note: | Graphs |
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| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Wang, Z., and B. Huang. 2003. Genotypic variation in abscisic acid accumulation, water relations, and gas exchange for Kentucky bluegrass exposed to drought stress. J. Am. Soc. Hortic. Sci. 128(3):p. 349-355. |
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| DOI: 10.21273/JASHS.128.3.0349 |
| Web URL(s):
https://journals.ashs.org/jashs/view/journals/jashs/128/3/article-p349.xml?rskey=HoTTqY
Last checked: 11/19/2019
Requires: PDF Reader |
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MSU catalog number: SB 1 .A46 |
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