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Cited by 168

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The Fusarium oxysporum Effector Six6 Contributes to Virulence and Suppresses I-2-Mediated Cell Death

Open access
Gawehns, F., Houterman, P. M., Ichou, F. Ait, Michielse, C. B., Hijdra, M., Cornelissen, B. J. C., Rep, M., Takken, F. L. W.·2014·Molecular Plant-Microbe Interactions®

Abstract

Plant pathogens secrete effectors to manipulate their host and facilitate colonization. Fusarium oxysporum f. sp. lycopersici is the causal agent of Fusarium wilt disease in tomato. Upon infection, F. oxysporum f. sp. lycopersici secretes numerous small proteins into the xylem sap (Six proteins). Most Six proteins are unique to F. oxysporum, but Six6 is an exception; a homolog is also present in two Colletotrichum spp. SIX6 expression was found to require living host cells and a knockout of SIX6 in F. oxysporum f. sp. lycopersici compromised virulence, classifying it as a genuine effector. Heterologous expression of SIX6 did not affect growth of Agrobacterium tumefaciens in Nicotiana benthamiana leaves or susceptibility of Arabidopsis thaliana toward Verticillium dahliae, Pseudomonas syringae, or F. oxysporum, suggesting a specific function for F. oxysporum f. sp. lycopersici Six6 in the F. oxysporum f. sp. lycopersici– tomato pathosystem. Remarkably, Six6 was found to specifically suppress I-2-mediated cell death (I2CD) upon transient expression in N. benthamiana, whereas it did not compromise the activity of other cell-death-inducing genes. Still, this I2CD suppressing activity of Six6 does not allow the fungus to overcome I-2 resistance in tomato, suggesting that I-2-mediated resistance is independent from cell death.

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Metadata

Authors
Gawehns, F., Houterman, P. M., Ichou, F. A., Michielse, C. B., Hijdra, M., Cornelissen, B. J. C., Rep, M., & Takken, F. L. W.
Venue
Molecular Plant-Microbe Interactions®
Published
2014-04
Volume
27
Issue
4
Pages
336-348
ISSN
  • 0894-0282 (ISSN-L)
  • 1943-7706
OpenAlex
W2127400277
Cited by
168
References
2
FWCI
12.72
Type
journal article
Language
en
Open access
bronze

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CoChat. (2026). Citation check: The Fusarium oxysporum Effector Six6 Contributes to Virulence and Suppresses I-2-Mediated Cell Death. https://app.cochat.ai/papers/10.1094/mpmi-11-13-0330-r
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Gawehns, F., Houterman, P. M., Ichou, F. A., Michielse, C. B., Hijdra, M., Cornelissen, B. J. C., Rep, M., & Takken, F. L. W. (2014). The Fusarium oxysporum Effector Six6 Contributes to Virulence and Suppresses I-2-Mediated Cell Death. Molecular Plant-Microbe Interactions®. https://doi.org/10.1094/mpmi-11-13-0330-r

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Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).

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