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| DOI: | 10.21273/JASHS.134.1.22 |
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| Web URL(s): | https://journals.ashs.org/jashs/view/journals/jashs/134/1/article-p22.xml?rskey=9BlgIQ
Last checked: 11/21/2019
Requires: PDF Reader |
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| Publication Type:
| Refereed |
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| Author(s): | Chen, Chuanhao;
Lu, Shaoyun;
Chen, Youguang;
Wang, Zhongcheng;
Niu, Yuejing;
Guo, Zhenfei |
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| Author Affiliation: | Biotechnology Laboratory for Turfgrass and Forages, College of Life Science, South China Agricultural University, Guangzhou, China |
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| Title: | A gamma-ray-induced dwarf mutant from seeded bermudagrass and its physiological responses 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. 134, No. 1, January 2009, p. 22-30. |
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| Publishing Information: | Alexandria, Va.: American Society for Horticultural Science |
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| # of Pages: | 9 |
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| Keywords: | TIC Keywords: Gamma irradiation; Cultivar improvement; Drought stress; Cynodon dactylon; Drought resistance; Proline; Antioxidants; Breeding
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| Cultivar Names: | Sundevil II |
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| Abstract/Contents: | "Breeding for dwarf-type bermudagrass (Cynodon dactylon) with enhanced drought resistance is important for producing quality turf with reduced irrigation. A dwarf-type mutant (S-20-1) that exhibits slower vertical growth, and shorter internodes and leaf length was selected from the gamma-ray-irradiated seeds of a bermudagrass cultivar Sundevil II (S-CK). S-20-1 had slower turf coverage than S-CK. Compared with S-CK, the vertical growth of S-20-1 was more promoted by gibberellin (GA3) treatment. S-20-1 showed an enhanced drought resistance in greenhouse and field tests. Under drought stress, S-20-1 maintained higher relative water content and lower levels of ion leakage, malondialdehyde, and leaf firing than S-CK. Antioxidant enzyme activities and antioxidant content showed no difference between S-20-1 and S-CK under well-watered conditions, while higher enzyme activities were maintained in S-20-1 under drought stress. Free proline accumulated in response to drought stress and showed a positive correlation to the increased ion leakage, while S-20-1 had lower levels than S-CK. Our results indicated that the dwarfism in S-20-1 induced by gamma-ray irradiation might be the result of less GA3 or decrease of sensitivity to GA3 in the mutant. The improved drought resistance of the mutant is associated with maintenance of higher levels of antioxidant enzyme activities. More accumulation of proline in S-CK than S-20-1 reflected a physiological response to the drought-induced injury rather than an association with drought resistance of S-20-1." |
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| Language: | English |
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| References: | 44 |
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| See Also: | Other items relating to: Breeding for Drought |
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| Note: | Pictures, color
Tables
Graphs |
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| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Chen, C., S. Lu, Y. Chen, Z. Wang, Y. Niu, and Z. Guo. 2009. A gamma-ray-induced dwarf mutant from seeded bermudagrass and its physiological responses to drought stress. J. Am. Soc. Hortic. Sci. 134(1):p. 22-30. |
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| DOI: 10.21273/JASHS.134.1.22 |
| Web URL(s):
https://journals.ashs.org/jashs/view/journals/jashs/134/1/article-p22.xml?rskey=9BlgIQ
Last checked: 11/21/2019
Requires: PDF Reader |
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MSU catalog number: b2221587a |
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