| 谭海运,尼玛扎西,刘国一,等.PEG模拟干旱胁迫对白菜型油菜芽期生长特性的影响[J].广东农业科学,2020,(7-8):- |
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PEG模拟干旱胁迫对白菜型油菜芽期生长特性的影响 |
| The response of Brassica rape seeding growth and physiological characteristics under drought tolerance |
| 投稿时间：2020-05-11 修订日期：2020-08-12 |
| DOI： |
| 中文关键词: 白菜型油菜，干旱胁迫，生长特性 |
| 英文关键词: Brassica rape drought resistance growth characteristics |
| 基金项目:西藏自治区重点研发与转化计划(XZ-2019-NK-NS-005)；西藏自治区重大科技专项(XZ201901NA05) |
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| 中文摘要: |
| 【目的】研究干旱胁迫对白菜型油菜芽期生长特性的影响,以期获得不同品种(系)的干旱的耐受性强弱。【方法】采用PEG溶液模拟水分胁迫研究4种白菜型油菜幼苗生长情况及生长特性。筛选不同品种的抗旱性强弱。【结果】随PEG溶液浓度增加,成苗率,主根长,单株鲜重,平均苗高,相对活力指数下降,抗氧化系统酶活性在5-15%范围内活性增加,高于15%时下降,可溶性蛋白,可溶性糖,脯氨酸,丙二醛含量随PEG浓度增加含量增加。104005抗旱性较强于其他材料。【结论】白菜型油菜芽期生长特性可作为抗旱性筛选指标,15-20%可作为春油菜模拟干旱胁迫最适浓度,并筛选到抗性材料104005。 |
| 英文摘要: |
| 【Objective】To study the effect of drought stress on the growth characteristics of Brassica rape at the bud stage in order to obtain the drought tolerance of different varieties (lines). 【Method】The PEG solution was used to simulate the water stress to study the growth and growth characteristics of 4 kinds of Brassica rape seedlings. Screen the drought resistance of different varieties.【Result】With the increase of PEG concentration, seedling rate, main root length, fresh weight per plant, average seedling height, relative activity index decreased, the activity of antioxidant system enzyme increased in the range of 5-15%, higher than 15% The content of soluble protein, soluble sugar, proline and malondialdehyde decreased with the increase of PEG concentration. 104005 is more resistant to drought than other materials.【Conclusion】The growth characteristics of Brassica rape at the bud stage can be used as the drought resistance screening index, and 15-20% can be used as the optimum concentration for simulating drought stress in spring rape, and screened the resistance material 104005. |
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