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Physiological Evaluation of Sugar Beet Genotypes under Drought Stress
| Content Provider | Semantic Scholar |
|---|---|
| Author | Habibi, Davood Taleghani, Daryoush Fatollah Oroojnia, S. |
| Copyright Year | 2013 |
| Abstract | This experiment was performed to study the effect of drought stress on some physiological characteristics of 15 sugar beet genotypes in 2009.White sugar yield, antioxidant enzymes (SOD,CAT,GPX) and biochemical biomarkers( MDA, Dityrozine, Dihydroxy goanozin) were measured. A split plot statistical design based on complete randomized block design was used to analysis the data. Highest level of drought stress treatment showed higher SOD (1796.48 mg protein / unit) activity and minimum enzyme activity obtained in normal irrigation treatment (967.24 unit /mg protein). Cultivars showed no significant difference for this enzyme. Highest level of drought stress treatment showed higher catalase (111.90 mg protein / unit) activity and minimum enzyme activity obtained in normal irrigation treatment(82.96unit /mg protein).Highest activity for CAT appeared in genotype(13) with 107.31 (unit /mg protein) and the lowest activity of CAT appeared in genotype (1). Highest drought stress level increased GPX about 181.99 (unit /mg protein) activity and the lowest level of this enzyme appeared in normal irrigation treatments 105.16 (unit/mg protein). Significant differences for GPX observed among cultivars. Highest amount of MDA 54.27 (nmol/mg protein) and the lowest amount 30.52 (n mol /mg protein) appeared in drought stress and normal condition, respectively. Between cultivars there were no significant difference for MDA. The highest percentage of protein degradation produced in the treatment of stress 15.49 (n mol /mg protein) and lowest degradation rate of proteins produced in the normal treatment 12.47 (n mol /mg protein). No significant differences observed among cultivars for dityrozin. Results of analysis of variance showed no significant difference between irrigation treatments for dihydroxy goanozin .There was significant difference between cultivars for dihydroxy goanozin. The highest Di hydroxy goanozin obtained in genotype (8) and the lowest in genotype (10).According to the results there was not significant difference between different levels of irrigation (normal and stress) for this trait. Analysis of variance for cultivars showed significant difference at 1% level for white sugar yield. Highest White sugar yield obtained in genotype (11) and the lowest was seen in genotype (5). Correlation between antioxidant enzymes (SOD, CAT, GPX) were positive and significant. Correlation between antioxidant enzymes and oxidative stress products (MDA, Dityrozin, Dihydroxy guanozin) was significant and positive. It seems that the drought resistant sugar beet plants have not necessarily higher yield. |
| File Format | PDF HTM / HTML |
| Alternate Webpage(s) | https://idosi.org/aejaes/jaes12(6)12/19.pdf |
| Alternate Webpage(s) | http://www.ipcbee.com/vol23/20-CCEA2011-A20009.pdf |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
