| 尖镰孢萎蔫专化型在土壤中的存在状态与菌量消长的关系 |
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| 引用本文： | 戴丽莉,顾希贤,林先贵,郝文英.尖镰孢萎蔫专化型在土壤中的存在状态与菌量消长的关系[J].土壤学报,1981,18(4):368-375. |
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| 作者姓名： | 戴丽莉 顾希贤 林先贵 郝文英 |
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| 作者单位： | 中国科学院南京土壤研究所;中国科学院南京土壤研究所;中国科学院南京土壤研究所;中国科学院南京土壤研究所 |
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| 摘 要： | 尖镰孢萎蔫专化型(Fusarium oxysporum f.sp.vasinfectum)是一种寄生兼腐生的土传性植物病原真菌,这种真菌除引起棉花枯萎病,严重危害棉花生产外,还能侵染大豆、烟草、花椰菜等40多种作物1),以及多种杂草6]。因此,该种真菌既能在受侵染的棉花植株体内繁殖蔓延,也能在其它宿主体内生存,并随同作物残体进人土壤中以腐生方式生活,或以厚垣抱子等休眠结构维持其生命。
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THE EXISTENCE AND FLUCTUATION OF F. OXYSPORUM F. SP. VASINFECTUM IN SOIL |
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| Dai Li-li,Gu Xi-xian,Lin Xian-gui and Hao Wen-ying.THE EXISTENCE AND FLUCTUATION OF F. OXYSPORUM F. SP. VASINFECTUM IN SOIL[J].Acta Pedologica Sinica,1981,18(4):368-375. |
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| Authors: | Dai Li-li Gu Xi-xian Lin Xian-gui and Hao Wen-ying |
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| Institution: | Institute of Soil Science, Academia Sinica, Nanjing;Institute of Soil Science, Academia Sinica, Nanjing;Institute of Soil Science, Academia Sinica, Nanjing;Institute of Soil Science, Academia Sinica, Nanjing |
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| Abstract: | The existence of F. oxysporum f. sp. vasinfectum in relation to the fluctuation of propagules in soil under different edaphie conditions was studied in vitro. It was shown that the ehlamydospores of this fungus were easily formed in upland field. But under vaaterlogged soil condition, formation of chlamydospores was inhibited because of the lack of oxygen and the toxicity of CO2. The germinated chlamydospores were capable of making further propagation under well aerated soil condition. However, in submerged soils, the germlings were easily suffered from bacteriolysis in soil in a few days. As a result, propagules decreased gradually. Part of the ungerminated chlamydospores persiated. in soil for a long time under submerged soil condition. Some of them can even survive more than 160 days. It is inferred that those chlamydospores still remained in soil might be one of the most important causative agents of reinfection, and it may be the reason that this fungus can not be eliminated and the wilt disease of cotton can not be completely controlled under rice-cotton rotation. |
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