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| Content Provider | Springer Nature Link |
|---|---|
| Author | Yao, Yanpo Li, Yan Chen, Zhiqun Zheng, Baiqin Zhang, Litian Niu, Ben Meng, Junli Li, Aijun Zhang, Jianmin Wang, Qi |
| Copyright Year | 2015 |
| Abstract | Potato late blight, caused by Phytophthora infestans is a most destructive plant pathogen and can lead to serious economic losses in potato. Some strains of the Trichoderma genus can act as potential biocontrol agents and are able to control many plant disease in crops. The present study was carried out to screen effective Trichoderma isolates against P. infestans and to study the potential modes of action involved. In vitro bioassays between P. infestans and Trichoderma isolates demonstrated that the P. infestans colony was significantly inhibited and overgrown by Trichoderma isolates. Antifungal metabolites produced by the isolate HNA14 significantly prevented the linear growth of the P. infestans colony. Mycoparasitism appeared to contribute to the aggressive nature of the Trichoderma isolate HNA14 against P. infestans when observed under scanning electron microscope (SEM). In planta bioassay, the isolate HNA14 significantly reduced the disease index, increased the plant stem height, and foliar fresh and dry weight. Under field conditions, the Trichoderma isolate HNA14 was the most efficient against the pathogen out of all Trichoderma strains, and significantly reduced the disease severity compared to the control. Collectively, the strategic approach described in this paper demonstrates an effective way of screening a biocontrol agent for control of potato pathogens.El tizón tardío de la papa, causado por Phytophthora infestans, es el fitopatógeno más destructivo, puede llevar a pérdidas económicas serias en papa. Algunas variantes del género Trichoderma pueden actuar como agentes potenciales de biocontrol, y son capaces de controlar muchas enfermedades de las plantas en los cultivos. El presente estudio se condujo para evaluar aislamientos válidos de Trichoderma contra P. infestans, para estudiar modos de acción potenciales involucrados. Bioensayos in vitro entre aislamientos de P. infestans y Trichoderma demostraron que la Colonia de P. infestans se inhibió significativamente y fue superada en crecimiento por los aislamientos de Trichoderma. Los metabolitos antifungicos producidos por el aislamiento HNA14 inhibieron significativamente el crecimiento lineal de la Colonia de P. infestans. El micoparasitismo pareció contribuir a la naturaleza agresiva del aislamiento HNA14 contra P. infestans cuando se observó bajo el microscopio electrónico de rastreo (SEM). En bioensayo en planta, el aislamiento HNA14 redujo significativamente el índice de severidad de la enfermedad y aumentó la altura del tallo de la planta y los pesos fresco y seco. Bajo condiciones de campo, el aislamiento de Trichoderma HNA14 fue el más eficiente contra el patógeno de todas las variantes de Trichoderma, y redujo significativamente la severidad de la enfermedad en comparación con el testigo. Colectivamente, el enfoque estratégico descrito en este artículo demuestra una manera efectiva de evaluar al agente de biocontrol para controlar patógenos de papa. |
| Starting Page | 33 |
| Ending Page | 42 |
| Page Count | 10 |
| File Format | |
| ISSN | 1099209X |
| Journal | American Potato Journal |
| Volume Number | 93 |
| Issue Number | 1 |
| e-ISSN | 18749380 |
| Language | English |
| Publisher | Springer US |
| Publisher Date | 2015-11-16 |
| Publisher Institution | Potato Association of America |
| Publisher Place | New York |
| Access Restriction | One Nation One Subscription (ONOS) |
| Subject Keyword | Trichoderma Biological control Potato late blight Phytophthora infestans Plant Sciences Agriculture Plant Genetics & Genomics Plant Breeding/Biotechnology Plant Pathology |
| Content Type | Text |
| Resource Type | Article |
| Subject | Plant Science Agronomy and Crop Science |
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