Root Border Cells and Their Role in Plant Defense
| Autor: | B. Gillian Turgeon, Gilberto Curlango-Rivera, Zhongguo Xiong, David A. Huskey, Caitilyn Allen, Tuan Minh Tran, Martha C. Hawes |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
0301 basic medicine
Rhizosphere Extracellular Traps Ralstonia solanacearum Meristem fungi food and beverages Virulence Plant Science Biology Cochliobolus heterostrophus biology.organism_classification Plant Roots Microbiology 03 medical and health sciences 030104 developmental biology Ascomycota Border cells Plant defense against herbivory Extracellular Plant Immunity Plant Diseases |
| Zdroj: | Annual Review of Phytopathology. 54:143-161 |
| ISSN: | 1545-2107 0066-4286 |
| DOI: | 10.1146/annurev-phyto-080615-100140 |
| Popis: | Root border cells separate from plant root tips and disperse into the soil environment. In most species, each root tip can produce thousands of metabolically active cells daily, with specialized patterns of gene expression. Their function has been an enduring mystery. Recent studies suggest that border cells operate in a manner similar to mammalian neutrophils: Both cell types export a complex of extracellular DNA (exDNA) and antimicrobial proteins that neutralize threats by trapping pathogens and thereby preventing invasion of host tissues. Extracellular DNases (exDNases) of pathogens promote virulence and systemic spread of the microbes. In plants, adding DNase I to root tips eliminates border cell extracellular traps and abolishes root tip resistance to infection. Mutation of genes encoding exDNase activity in plant-pathogenic bacteria (Ralstonia solanacearum) and fungi (Cochliobolus heterostrophus) results in reduced virulence. The study of exDNase activities in plant pathogens may yield new targets for disease control. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|