Journal
BIOTECHNOLOGY & BIOTECHNOLOGICAL EQUIPMENT
Volume 26, Issue 6, Pages 3351-3358Publisher
TAYLOR & FRANCIS LTD
DOI: 10.5504/BBEQ.2012.0110
Keywords
Robinia pseudoacacia L.; diploid; tetraploid; salt stress; antioxidant enzymes
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Funding
- National Natural Science Foundation of China [30901142, 31170568]
- Fundamental Research Funds for the Central Universities [DL11CA02]
- Natural Science Foundation of Heilongjiang Province [C201002]
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Polyploid plants are reported to have strong tolerance to environmental stress. In this study, we investigated the effects of salt stress on the concentrations of salt ion, MDA, O-2(center dot-) H2O2, and the activities and isoenzymes of antioxidant enzymes (superoxide dismutase [SOD]), catalase [CAT], peroxidase [POD], and ascorbate peroxidase [APX]) in diploid and tetraploid Robinia pseudoacacia L.. In diploids, salt treatment induced accumulation of salt ions and increasing of MDA, O-2(center dot-), and H2O2. The concentrations of salt ion, MDA, O-2(center dot-), and H2O2 in tetraploids were lower than those in diploids, while the activities of SOD, CAT, and APX remained at a higher level. These results indicted that tetraploid R. pseudoacacia have a stronger antioxidant defense system and increased salt tolerance. Biotechnol. & Biotechnol. Eq. 2012, 26(6), 3351-3358
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