Full TGIF Record # 70953
Item 1 of 1
Publication Type:
Content Type:Abstract or Summary only
Author(s):Jiang, Y.; Huang, B.
Author Affiliation:Kansas State University
Title:Effects of calcium on antioxidant metabolism and water relations associated with heat tolerance in two cool-season grasses
Section:Turfgrass science
Other records with the "Turfgrass science" Section
Meeting Info.:Minneapolis, MN: November 5-9, 2000
Source:2000 Annual Meeting Abstracts [ASA/CSSA/SSSA]. 2000, p. 154.
# of Pages:1
Publishing Information:[Madison, WI]: American Society of Agronomy, Crop Science Society of America, Soil Science Society of America
Keywords:TIC Keywords: Calcium; Antioxidants; Metabolism; Water relations; Heat resistance; Cool season turfgrasses; Festuca arundinacea; Poa pratensis; Superoxide dismutase; Catalase; Ascorbate peroxidase; Osmotic adjustment
Abstract/Contents:"This study was designed to examine whther external Ca2+ treatment would improve heat tolerance in tall fescue (Festuca arundinacea L.) and Kentucky bluegrass (Poa prastensis L). Grasses were treated with CaC12 (10 mM) or H20 by foliar application and then exposed to heat stress (35C /30C) in growth chambers. Some of the Cat+-untreated plants were maintained at 20C /15C as the temperature control. Calcium treatment maintained higher turf quality, relative water content (RWC), and chlorophyll (Chl) content of leaves than untreated plants in both species under heat stress. Calcium treatment increased Ca2+ concentration in cell saps under heat stress, but had no effects on osmotic potential and osmotic adjustment in both species. External Ca2+ treatment had no effect son [on] superoxide dismutase (SOD) activity under heat stress, but increased catalase (CAT), ascorbate peroxidase (AP), and glutathione reductase (GR) activities and reduced the accumulation of malondiald! ehyde (MDA) in both species. The results suggest that exogenous Ca2+ treatment enhanced heat tolerance in both tall fescue and Kentucky bluegrass due to maintenance of antioxidant activities and a decrease in membrane lipid peroxidation, but not to the regulation of osmotic potential and osmotic adjustment."
Note:This item is an abstract only!
ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Jiang, Y., and B. Huang. 2000. Effects of calcium on antioxidant metabolism and water relations associated with heat tolerance in two cool-season grasses. Annu. Meet. Abstr. p. 154.
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MSU catalog number: S 1 .A58
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