Structural Characterisation of the Interaction between Triticum aestivum and the Dothideomycete Pathogen Stagonospora nodorum |
| |
| Authors: | Peter S Solomon T J Greer Wilson Kasia Rybak Kerrie Parker Rohan G T Lowe Richard P Oliver |
| |
| Institution: | (1) Australian Centre for Necrotrophic Fungal Pathogens, SABC, Division of Health Sciences, Murdoch University, Perth, WA, 6150, Australia |
| |
| Abstract: | The interaction between Stagonospora nodorum and a susceptible wheat cultivar was investigated using a range of microscopic techniques. Germination of pycnidiospores
occurred approximately 3 h after making contact with the leaf surface and was followed by attempted penetration 8–12 h later.
Penetration was observed through stomata and also directly through periclinal and anticlinal epidermal cell walls. Penetration
down the anticlinal cell walls appeared to occur without a differentiated penetrating structure whilst structures identified
as either lateral appressoria or hyphopodia were typically present when penetrating over a periclinal cell wall. Once inside
the leaf, the fungus continued to grow for the next 4–5 days colonising all parts of the leaf except the vascular bundles.
Only in the later phase of the infection was total host cell collapse apparent. Evidence of polyphenolic compounds was observed.
The infection cycle was completed within 7 days as indicated by sporulation on the leaf surface. These results have allowed
us to understand how the fungus physically interacts with the leaf and will help the overall understanding of the infection
process. |
| |
| Keywords: | hyphopodia leaf and glume blotch Stagonospora nodorum |
| 本文献已被 SpringerLink 等数据库收录！ |
