| 付菊梅、康晓慧、白雪、卢晓霞、杨随庄.芸薹根肿菌毒素对油菜幼苗生理
性状及生长的影响[J].广东农业科学,2014,41(10):1-4 |
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芸薹根肿菌毒素对油菜幼苗生理
性状及生长的影响 |
| Effects of Plasmodiophora brassicae toxin on physiologicalcharacteristics and growth of rape seedlings |
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| DOI： |
| 中文关键词: 芸薹根肿菌 毒素 油菜 生理特性 |
| 英文关键词: Plasmodiophora brassicae Woron toxin rape physiological characteristics |
| 基金项目:国家农业现代化四川创新团队-油菜病虫防治研
究 |
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| 摘要点击次数: 1822 |
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| 中文摘要: |
| 为探索芸薹根肿菌的致病作用、采用水培法研究根肿菌毒素对油菜胚根和胚芽生长尧幼苗致萎性尧细胞
膜透性尧叶绿素含量尧根系活力和幼苗生长的影响。结果表明院根肿菌毒素具有明显的生物活性、能够抑制油菜胚根
和胚芽的生长、且随处理时间的延长和处理浓度的增加、幼苗萎蔫级数逐渐增加。毒素的作用可使油菜细胞膜透性
增加、叶绿素含量和根系活力下降、其中叶绿素b 的含量随处理时间的延长表现为先上升后下降的趋势、但仍低于
对照。油菜幼苗的株高和主根长随毒素浓度的提高均呈逐渐下降的趋势、在85%和100%毒素浓度胁迫下、油菜幼苗
株高及主根长均显著低于对照、说明植株的生长受到明显抑制。 |
| 英文摘要: |
| Effects of Plasmodiophora brassicae toxin on the radicle and embryo growth, seedling wilting, cell
membrane permeability, chlorophyll content, root activity and seedling growth of rape were studied to explore the
pathogenic mechanism of P. brassicae Woron by water culture method. The results indicated that the toxin had significant
biological activity, could inhibit the growth of radicle and embryo. The wilting degree of seedlings increased with extension
of culturing time and toxin concentration. The rape under toxin exhibited an increase in membrane permeability but a
decrease in chlorophyll content and root activity, especially chlorophyll b content firstly enhanced and then decreased with
the increase of treatment time. With toxin concentration rising, seedling height and root length appeared gradually
decreasing trend and dramatically lower than CK at 85% and 100% concentrations of toxin. It showed that the plant growth
at this time was inhibited obviously. |
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