The spores of Colletotrichum higginsianum germinate on plant surfaces to produce highly specialized cells called appressoria with thick, darkly melanized cell walls. Long-recognized as organs of attachment and penetration, appressoria also function in the focal delivery of secreted effector proteins (see Kleemann et al., doi: 10.1371/journal.ppat.1002643). Transmission electron microscopy reveals a needle-like penetration hypha emerging from a nanoscale pore (200 nm diameter) in the base of the appressorium to puncture the plant cuticle and cell wall.
Image Credit: Richard O'Connell, Max Planck Institute for Plant Breeding Research, Cologne
Opinion
The Problem of Auto-Correlation in Parasitology
PLOS Pathogens: published April 12, 2012 | https://doi.org/10.1371/journal.ppat.1002590
Pearls
The Accessory Genome as a Cradle for Adaptive Evolution in Pathogens
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The Role of Mast Cells in the Defence against Pathogens
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The Arbuscular Mycorrhizal Symbiosis: Origin and Evolution of a Beneficial Plant Infection
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Fungal Biofilms
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Reviews
Systematic Review of Mucosal Immunity Induced by Oral and Inactivated Poliovirus Vaccines against Virus Shedding following Oral Poliovirus Challenge
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Ross, Macdonald, and a Theory for the Dynamics and Control of Mosquito-Transmitted Pathogens
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Epstein-Barr Virus LMP2A Reduces Hyperactivation Induced by LMP1 to Restore Normal B Cell Phenotype in Transgenic Mice
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