| Research on physiological characteristics and the assessment of tolerance of different varieties of sweet sorghum seedlings to saline-sodic stress |
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| DOI：10.7606/j.issn.1000-7601.2012.02.14 |
| Key Words: sweet sorghum saline-sodic stress physiological characteristics tolerance |
| Author Name | Affiliation | | DAI Lingyan | College of Biology Science and Technology, Shenyang Agricultural University, Shenyang, Liaoning 110866, China
College of Life Science and Technology, Heilongjiang Bayi Agricultural University, Daqing, Heilongjiang 163319, China | | ZHANG Lijun | College of Biology Science and Technology, Shenyang Agricultural University, Shenyang, Liaoning 110866, China | | RUAN Yanye | College of Biology Science and Technology, Shenyang Agricultural University, Shenyang, Liaoning 110866, China | | HU Kai | College of Biology Science and Technology, Shenyang Agricultural University, Shenyang, Liaoning 110866, China |
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| Abstract: |
| In order to study the physiological changes to the saline sodic stress based on the composition of Na2CO3 and NaHCO3 and assess the tolerance of differen
t varieties of sweet sorghum (Sorghum bicolor (Linn.) Moench), the paper was determined the relative indexes of seedling growth and physiology in the six varieties of sweet sorghum seedlings with condition of salin-sodic stress. The re
sults showed that compared with the respective control group, under saline-sodic stress，the sweet sorghum seedlings was decreased the total weight of plant, height, root vigor and total chlorophyll content, but increased the content of soluble sugar, soluble protein and proline, improved the activity of peroxidase, catalase and glutathione peroxidase. Meanwhile, plants were increased the relative permeability of plasma membranes and content of malonaldehyde. However, root-shoot ratio and activity of superoxide dismutase were showed higher or lower among the different varieties. M-81E displayed that root length was down slightly, root-shoot ratio was increased furthest, the relative permeability of plasma membranes and content of malonaldehyde were added least, superoxide dismutase and catalase were enhanced furthest. But, 314B displayed that root-shoot ratio, height and total chlorophyll content were decreased most, the relative permeability of plasma membranes and content of malonaldehyde were added more. The assessment of the sweet sorghum tolerance to saline sodic stress with the method of subordinate function values showed that the 6 varieties of sweet sorghum were ordered in sequence from the strong to weak: M 81E＞Ximeng＞Rio＞NengsiⅠ＞Keteer＞314B. The conclusions can reflect that the main adaptable characterizations from sweet sorghum seedlings resisting the condition of saline-sodic stress, were the root-shoot ratio increased, the root vigor decreased lesser, the content of soluble protein increased more, the activity of superoxide dismutase and catalase increased more. |
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