Effects of simulated drought stress by PEG on sprouting and seedling growth of flax (Linum usitatissimum L.)
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DOI：10.7606/j.issn.1000-7601.2011.06.41
Key Words: polyethylene glycol  flax  drought stress  gemination  drought tolerance
Author NameAffiliation
WANG Lei Key Laboratory of Oil Crop Biology of the Ministry of Agriculture, Oil Crops Research Institute， CAAS， Wuhan 430062，China 
TAN Meilian Key Laboratory of Oil Crop Biology of the Ministry of Agriculture, Oil Crops Research Institute， CAAS， Wuhan 430062，China 
YAN Mingfang Key Laboratory of Oil Crop Biology of the Ministry of Agriculture, Oil Crops Research Institute， CAAS， Wuhan 430062，China 
WANG Lijun Key Laboratory of Oil Crop Biology of the Ministry of Agriculture, Oil Crops Research Institute， CAAS， Wuhan 430062，China 
YAN Xingchu Key Laboratory of Oil Crop Biology of the Ministry of Agriculture, Oil Crops Research Institute， CAAS， Wuhan 430062，China 
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Abstract:
      The polyethylene glycol (PEG) was used to simulate drought to study the gemination and seedling growth of flax. The results showed that seedling was more sensitive to PEG treatment than germination. 5%0 PEG promoted sprouting，and 15% PEG were appropriate for simulating drought. Under 15%(w/v)PEG treatment，seed vigor was re-duced，mean germination index (GI)， vigor index(VI)，hypocotyl elongation and fresh weight of seedling were repressed significantly，but no consistency was found on the primary root growth; Significant increase was also found in REC，con-tent of malonaldehyde (MDA)，proline (Pro) and soluble sugar (SS) of seedling, and difference was found among prima-ry root, hypocotyl and cotyledon.
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