PEG模拟干旱对胡麻种子萌发及幼苗生长的影响

汪磊; 谭美莲; 严明芳; 王力军; 严兴初

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 Name	Affiliation
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.