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| DOI: | 10.21273/JASHS.137.3.134 |
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| Web URL(s): | https://journals.ashs.org/jashs/view/journals/jashs/137/3/article-p134.xml
Last checked: 04/30/2020
https://journals.ashs.org/jashs/downloadpdf/journals/jashs/137/3/article-p134.xml
Last checked: 04/30/2020
Requires: PDF Reader |
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| Publication Type:
| Refereed |
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| Author(s): | Hu, Longxing;
Huang, Zehui;
Liu, Shuqian;
Fu, Jinmin |
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| Author Affiliation: | Key Laboratory of Plant Germplasm Enhancement and Specialty Agriculture, Wuhan Botanical Garden, The Chinese Academy of Science, Wuhan City, China |
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| Title: | Growth response and gene expression in antioxidant-related enzymes in two bermudagrass genotypes differing in salt tolerance |
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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 HorticulturalScience. Vol. 137, No. 3, May 2012, p. 134-143. |
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| Publishing Information: | Alexandria, Virginia: American Society for Horticultural Science |
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| # of Pages: | 10 |
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| Keywords: | TIC Keywords: Ascorbate peroxidase; Catalase; Cultivar evaluation; Cultivar profile; Cultivar variation; Cynodon dactylon; Enzyme activators; Gene expression; Morphological evaluation; Physiological processes; Root length; Root length density; Root weight; Root-shoot ratio; Salinity stress; Salt tolerance; Superoxide dismutase; Variety trials
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| Cultivar Names: | C43; C198 |
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| Abstract/Contents: | "Plant adaptation to salt stress may be associated with morphological, physiological, and gene expression alterations. The objective of this study was to investigate the effect of salt stress on morphological and antioxidant enzyme changes and its gene expressions in bermudagrass (Cynodon dactylon). Salt-tolerant 'C43' and salt-sensitive 'C198', previously determined in our preliminary study, were subjected to four salinity levels: 0 mM (control), 100 mM (low), 200 mM (moderate), and 400 mM (high) NaCl for 21 days. Salt stress decreased turf quality and canopy height, especially in 'C198'. Salt stress increased root length, root number, root fresh weight, and root/shoot length ratio, to a greater extent in salt-tolerant genotype. Salt stress increased Na+ and decreased K+ content, which resulted in a higher Na+/K+ ratio in bermudagrass, to a great extent in shoot and root of 'C198'. Moderate (200 mM) and high (400 mM) salt concentration increased malondialdehyde and hydrogen peroxide content in old leaves of 'C198'. 'C43' exhibited a greater activity of superoxide dismutase (SOD), catalase (CAT), ascorbate peroxidase (APX), and dehydro-ascorbate reductase (DHAR) than 'C198'in old leaves subjected to 200 and 400 mM NaCl. Antioxidant gene expressions were upregulated in new leaves and downregulated in old leaves with increasing salinity levels for both genotypes. Salt-tolerant genotypes exhibited a relatively greater antioxidant gene expression than salt-sensitive ones when exposed to the same level of salt stress. These results suggested that SOD, CAT, APX, and DHAR might be involved in scavenging salt stress-induced reactive oxygen species in bermudagrass at the level of gene expression. Salt tolerance might be attributed to the development and maintenance of a more extensive root system under saline conditions and induced antioxidant gene expressions, leading to more efficient enzyme stimulation and protection in bermudagrass." |
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| Language: | English |
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| References: | 59 |
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| Note: | Tables
Graphs |
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| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Hu, L., Z. Huang, S. Liu, and J. Fu. 2012. Growth response and gene expression in antioxidant-related enzymes in two bermudagrass genotypes differing in salt tolerance. J. Am. Soc. Hortic. Sci. 137(3):p. 134-143. |
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| DOI: 10.21273/JASHS.137.3.134 |
| Web URL(s):
https://journals.ashs.org/jashs/view/journals/jashs/137/3/article-p134.xml
Last checked: 04/30/2020
https://journals.ashs.org/jashs/downloadpdf/journals/jashs/137/3/article-p134.xml
Last checked: 04/30/2020
Requires: PDF Reader |
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MSU catalog number: b2221587a |
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