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DOI: | 10.17660/eJHS.2017/82.2.4 |
Web URL(s): | http://www.pubhort.org/ejhs/82/2/4/82_2_4.pdf Last checked: 06/16/2017 Requires: PDF Reader |
Publication Type:
| Report |
Author(s): | Xu, Lixin;
Li, Xiaoshuai;
Han, Liebao;
Li, Deying;
Song, Guilong |
Author Affiliation: | Xu, Xiaoshuai Li, Han, and Song: Institute of Turfgrass Science, Beijing Forestry University, Beijing, China; Deying Li: North Dakota State University, Fargo, North Dakota |
Title: | Epichloe endophyte infection improved drought and heat tolerance of tall fescue through altered antioxidant enzyme activity |
Source: | European Journal of Horticultural Science. Vol. 82, No. 2, 2017, p. 90-97. |
Publishing Information: | Stuttgart, Germany: Eugen Ulmer KG |
# of Pages: | 8 |
Keywords: | TIC Keywords: Drought resistance; Endophyte-infected plants; Epichloe; Evaluations; Festuca arundinacea; Heat resistance
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Abstract/Contents: | "Background of the study: Epichloe species are fungal endophytes of many cool season grass species. The Epichloe-tall fescue association is generally known to confer drought tolerance of tall fescue although the effect varied depending a lot of factors. Besides, few studies are focused on the effect of fungal endophyte on heat tolerance of tall fescue. Objectives: This study was to investigate the effect of fungal endophyte on drought and heat tolerance of tall fescue. Methods: In this study, endophyte infected (E+) and non-infected (E-) tall fescue plants were exposed to two separate experiments, drought tolerance experiment and heat tolerance experiment. Physiological parameters and antioxidant enzyme activity were measured. Results: Compared with E- plants, lower levels of electrolyte leakage, malondialdehyde content, and hydrogen peroxide (H2O2) content were observed in E+ plants during drought, re-watering and heat stress treatment. Lower level of superoxide (O2-) content was also observed in E+ plants upon re-watering. In addition, endophyte infection promoted higher relative water content and higher superoxide dismutase (SOD) and ascorbate peroxidase (APX) activity at the end of drought treatment. E+ plants had higher levels of catalase (CAT), guaiacol peroxidase (POD) and APX activity than E- plants by the end of heat treatment. Conclusions: Our results support a protective role of the endophyte in conferring drought and heat tolerance of tall fescue. E+ plants appear to reduce ROS (reactive oxygen species, e.g., O2- and H2O2) production in part by maintaining higher enzyme activity of SOD and APX under drought and CAT, POD and APX activity under heat stressed conditions." |
Language: | English |
References: | 47 |
Note: | Summary appears as abstract Includes sidebar, "Significance of this study", p. 90 Graphs |
| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete): Xu, L., X. Li, L. Han, D. Li, and G. Song. 2017. Epichloe endophyte infection improved drought and heat tolerance of tall fescue through altered antioxidant enzyme activity. European Journal of Horticultural Science. 82(2):p. 90-97. |
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| DOI: 10.17660/eJHS.2017/82.2.4 |
| Web URL(s): http://www.pubhort.org/ejhs/82/2/4/82_2_4.pdf Last checked: 06/16/2017 Requires: PDF Reader |
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