| 汪磊,谭美莲,严明芳,王力军,严兴初.PEG模拟干旱对胡麻种子萌发及幼苗生长的影响[J].干旱地区农业研究,2011,29(6):227~232 |
| PEG模拟干旱对胡麻种子萌发及幼苗生长的影响 |
| 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 |
| 中文关键词: 聚乙二醇 胡麻 干旱胁迫 萌发 耐旱性 |
| 英文关键词:polyethylene glycol flax drought stress gemination drought tolerance |
| 基金项目:国家科技支撑计划“特色油料作物抗灾与节本增效关键技术研究与示范”(2009BADA8B04-02)；现代农业产业技术体系建设专项资金(nycytx-22) |
| 作者 | 单位 | | 汪磊 | 农业部油料作物生物学重点开放实验室,中国农业科学院油料作物研究所,湖北 武汉 430062 | | 谭美莲 | 农业部油料作物生物学重点开放实验室,中国农业科学院油料作物研究所,湖北 武汉 430062 | | 严明芳 | 农业部油料作物生物学重点开放实验室,中国农业科学院油料作物研究所,湖北 武汉 430062 | | 王力军 | 农业部油料作物生物学重点开放实验室,中国农业科学院油料作物研究所,湖北 武汉 430062 | | 严兴初 | 农业部油料作物生物学重点开放实验室,中国农业科学院油料作物研究所,湖北 武汉 430062 |
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| 中文摘要: |
| 采用PEG模拟干旱胁迫处理,研究胡麻种子萌发及幼苗生长情况。结果表明,PEG对成苗的影响大于萌发,低浓度PEG(5%)对萌发有促进作用,15%PEG为适宜的胁迫浓度。在15%PEG胁迫下,胡麻种子活力不同程度降低,主要表现在发芽指数(GI)、活力指数(VI)、下胚轴生长受到显著抑制,幼苗鲜重降低,但对初生根生长的影响不一致;幼苗相对电导率(REC)、丙二醛(MDA)、脯氨酸(Pro)和可溶性糖(SS)含量均显著增加,增幅在初生根、下胚轴、子叶中存在差异。 |
| 英文摘要: |
| 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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