| Effects of complex alkal-i saline stress on germination and seedling growth of broom sorghum （sorghum bicolor （L．） Moench） |
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| DOI：10.7606/j.issn.1000-7601.2008.04.28 |
| Key Words: complex alkal-i salt mixed stress broom sorghum germination seedlings osmotic stress ion toxicity |
| Author Name | Affiliation | | CHI Chunming | Northeast Institute of Geography and Agricultural Ecology CAS,Changchun 130012,China； Graduate School CAS, Beijing 100049,China | | WANG Zhichun | Northeast Institute of Geography and Agricultural Ecology CAS,Changchun 130012,China | | LI Bin | Northeast Institute of Geography and Agricultural Ecology CAS,Changchun 130012,China； Graduate School CAS, Beijing 100049,China |
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| Abstract: |
| Mixture of NaHCO3 and Na2CO3 in the ratio of 1∶1（molar） was used as the first treatment （T1） and NaHCO3 Na2CO3 and NaCl were mixed in the ratio of1∶1∶1（molar） as the second treatment （T2） to obtain complex alkal-i saline stress．The total concentrations of both abovementioned two treatment solutions are 250 mmol／L．The Results show that complex alkal-i saline stress not only significantly inhibited the germination of broom sorghum seeds seedling growth and relative growth rate （RGR） of broom sorghum seedlings but also enhanced the rate of electrolyte leakage and soluble sugars content and reduced the chlorophyll content of leaves．And effects of complex alkal-i saline stress caused by mixing NaHCO3 and Na2CO3 on germination of broom seeds and seedling growth of broom sorghum were significant greater than those of complex alkal-i saline stress caused by mixing NaHCO3 Na2CO3 and NaCl． |