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| Web URL(s): | https://www.dl.sciencesocieties.org/publications/cs/articles/42/2/466
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https://www.dl.sciencesocieties.org/publications/cs/pdfs/42/2/466
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| Publication Type:
| Refereed |
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| Author(s): | Liu, Xiaozhong;
Huang, Bingru |
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| Author Affiliation: | Liu: Department of Botany and Microbiology, University of Oklahoma, Norman, OK; Huang, Department of Plant Science, Rutgers University, New Brunswick, NJ |
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| Title: | Cytokinin effects on creeping bentgrass response to heat stress: II. Leaf senescene and antioxidant metabolism |
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| Section: | Turfgrass science
Other records with the "Turfgrass science" Section
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| Source: | Crop Science. Vol. 42, No. 2, March/April 2002, p. 466-472. |
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| Publishing Information: | Madison, WI: Crop Science Society of America |
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| # of Pages: | 7 |
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| Keywords: | TIC Keywords: Cytokinins; Agrostis stolonifera; Heat stress; Senescence; Leaves; Antioxidants; Metabolism; Heat injury; Root zone; Air temperature; Soil temperature; Application rates; Electrolyte leakage; Chlorophyll; Catalase
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| Abstract/Contents: | "In another study, results of growth response to cytokinin indicate that heat stress injury in creeping bentgrass can be alleviated to some extent by injection of cytokinin to the root zone. The objective of this study was to examine whether the alleviating effects of exogenous application of a cytokinin on heat injury in creeping bentgrass (Agrostis palustris L.) involve regulation of antioxidant activities. Creeping bentgrass was exposed to three air/soil temperature regimes for 56 d in growth chambers: (i) low air and soil temperature control (20/20°C); (ii) high soil temperature (20/35°C); and (iii) high air/soil temperatures (35/35°C). Four different concentrations (0.01, 0.1, 1, and 10 μmol) of zeatin riboside (ZR) or water (control) were injected into the root zone (0 to 5 cm depth) of plants on the day before heat stress was imposed (0 d) and 14 d after. Leaf electrolyte leakage (EL) and the content of a lipid peroxidation product, malondialdehyde (MDA), increased, whereas leaf chlorophyll content and activities of superoxide dismutase (SOD) and catalase (CAT) decreased at 20/35°C or 35/35°C for ZR-untreated plants. Exogenous ZR significantly suppressed these responses under both high temperature regimes. Application of 10 μmol ZR was most effective in slowing leaf senescene and alleviating heat-induced lipid peroxidation of cell membranes, followed by 1 μmol at 35/35°C. Applying 0.1 and 0.01 μmol ZR had no effects on creeping bentgrass responses to 20/35 or 35/35°C. Our results suggested the alleviating effects of ZR at 1 and 10 μmol in heat injury to creeping bentgrass was related to the inhibition of lipid peroxidation and slowing leaf senescence." |
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| Language: | English |
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| References: | 36 |
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| See Also: | Other items relating to: Biostimulants |
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| Note: | Partial reprint appears in Cornell University Turfgrass Times Vol. 13 No. 1 Spring 2002 p. 3
Graphs |
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| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Liu, X., and B. Huang. 2002. Cytokinin effects on creeping bentgrass response to heat stress: II. Leaf senescene and antioxidant metabolism. Crop Sci. 42(2):p. 466-472. |
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| Web URL(s):
https://www.dl.sciencesocieties.org/publications/cs/articles/42/2/466
Last checked: 05/05/2017
Access conditions: Item is within a limited-access website
https://www.dl.sciencesocieties.org/publications/cs/pdfs/42/2/466
Last checked: 05/05/2017
Requires: PDF Reader
Access conditions: Item is within a limited-access website |
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MSU catalog number: SB 183 .C7 |
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