| PEG胁迫对光皮桦种子萌发和幼苗生长的影响 |
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| 引用本文： | 丁强强,刘敏,万志兵. PEG胁迫对光皮桦种子萌发和幼苗生长的影响[J]. 黑龙江八一农垦大学学报, 2013, 0(6): 13-16 |
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| 作者姓名： | 丁强强 刘敏 万志兵 |
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| 作者单位： | [1]黄山学院生命与环境科学学院,黄山245041 [2]南京林业大学,黄山245041 |
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| 基金项目： | 省级优秀青年人才基金项目（2012SQRL185） |
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| 摘 要： | 为了研究光皮桦种子在干旱条件下的萌发及生长状况，采用不同浓度的PEG-6000（聚乙二醇）模拟干旱，研究不同干旱胁迫强度对光皮桦种子萌发和幼苗生长的影响。结果表明：种子的发芽率、发芽势、发芽指数、抗旱指数均在5％浓度处理时最高；在5％浓度处理下幼苗的上胚轴最长，下胚轴长度在没有PEG胁迫下最长。这说明了较低浓度的PEG对光皮桦种子的萌发有明显的促进作用，同时能够对其幼苗上胚轴的生长有促进作用。
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| 关 键 词： | PEG 光皮桦 干旱胁迫 |
Effects of PEG Stress on Seed Germination and Seedling Growth of Betula luminifera |
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| Ding Qiangqiang,Liu Min,Wan Zhibing. Effects of PEG Stress on Seed Germination and Seedling Growth of Betula luminifera[J]. journal of heilongjiang bayi agricultural university, 2013, 0(6): 13-16 |
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| Authors: | Ding Qiangqiang Liu Min Wan Zhibing |
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| Affiliation: | 1.College of Life and Environment sciences, Huangshan University, Huangshan 245041 ;2.Nanjing Forestry University) |
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| Abstract: | To determine the germination and seedling growth of Betula luminifera under drought stress, seed germination and seedling growth of Betula luminifera were assessed by the different concentration of polyethylene glycol （PEG6000）simulated drought stress. The results showed that the germination rate （GR）, germination potential （GP）, germination index （GI）and drought resistant index were the highest in 5% concentration of the PEG-6000.The epicotyl was also the longest in 5% concentration of the PEG-6000,and The hypoeotyl was longest under no PEG condition.The results indicated that low concentration PEG could promote the germination of Betula luminifera and the growth of epieotyl. |
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| Keywords: | PEG Betula luminifera drought stress |
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