Journal article
Root Defense Responses to Fungal Pathogens: A Molecular Perspective
Plant and soil, Vol.274(1), pp.215-226
07/2005
Handle:
https://hdl.handle.net/2376/108320
Abstract
This review will focus on the molecular and genetic mechanisms underlying defense responses of roots to fungal pathogens. Soil-borne pathogens, including Phytophthora, Pythium, Fusarium, and Bipolaris, represent major sources of biotic stress in the rhizosphere and roots of plants. Molecular recognition and signaling leading to effective resistance has been demonstrated to occur between host and Phytophthora, or Pythium. The hypersensitive response and apoptotic cell death, two oxidative processes that limit biotrophic pathogens, generally act to exacerbate disease symptoms induced by necrotrophic organisms. Although pathogenesis-related proteins can be expressed in roots during pathogen challenge, salicylic acid has not been implicated in root-mediated interactions. Jasmonic acid and ethylene have been found to mediate parallel as well as synergistic pathways that confer partial tolerance to necrotrophic pathogens, as well as induced systemic resistance to root and foliar pathogens. Genomics approaches are revealing new networks of defense-signaling pathways, and have the potential of elucidating those pathways that are important in root-defense responses.
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Details
- Title
- Root Defense Responses to Fungal Pathogens: A Molecular Perspective
- Creators
- Patricia Okubara - U.S. Department of Agriculture, Agricultural Research Service, Root Disease and Biological Control Research Unit, and Department of Plant Pathology Washington State University Pullman Washington USATimothy Paulitz - U.S. Department of Agriculture, Agricultural Research Service, Root Disease and Biological Control Research Unit, and Department of Plant Pathology Washington State University Pullman Washington USA
- Publication Details
- Plant and soil, Vol.274(1), pp.215-226
- Academic Unit
- Plant Pathology, Department of
- Publisher
- Kluwer Academic Publishers; Dordrecht
- Identifiers
- 99900547377401842
- Language
- English
- Resource Type
- Journal article