Abstract:
:Phytohormones, such as salicylic acid (SA), ethylene (ET) and jasmonic acid (JA), play key roles in plant defence following pathogen attack. The involvement of these hormones in susceptibility following Fusarium oxysporum (Fo) infection has mostly been studied in Arabidopsis thaliana. However, Fo causes vascular wilt disease in a broad range of crops, including tomato (Solanum lycopersicum). Surprisingly little is known about the involvement of these phytohormones in the susceptibility of tomato towards Fo f. sp. lycopersici (Fol). Here, we investigate their involvement by the analysis of the expression of ET, JA and SA marker genes following Fol infection, and by bioassays of tomato mutants affected in either hormone production or perception. Fol inoculation triggered the expression of SA and ET marker genes, showing the activation of these pathways. NahG tomato, in which SA is degraded, became hypersusceptible to Fol infection and showed stronger disease symptoms than wild-type. In contrast, ACD and Never ripe (Nr) mutants, in which ET biosynthesis and perception, respectively, are impaired, showed decreased disease symptoms and reduced fungal colonization on infection. The susceptibility of the def1 tomato mutant, and a prosystemin over-expressing line, in which JA signalling is compromised or constitutively activated, respectively, was unaltered. Our results show that SA is a negative and ET a positive regulator of Fol susceptibility. The SA and ET signalling pathways appear to act synergistically, as an intact ET pathway is required for the induction of an SA marker gene, and vice versa.
journal_name
Mol Plant Patholjournal_title
Molecular plant pathologyauthors
Di X,Gomila J,Takken FLWdoi
10.1111/mpp.12559subject
Has Abstractpub_date
2017-09-01 00:00:00pages
1024-1035issue
7eissn
1464-6722issn
1364-3703journal_volume
18pub_type
杂志文章abstract::Recently, Tomato spotted wilt virus (TSWV) nonstructural protein NSs has been identified unambiguously as an avirulence (Avr) determinant for Tomato spotted wilt (Tsw)-based resistance. The observation that NSs from two natural resistance-breaking isolates had lost RNA silencing suppressor (RSS) activity and Avr sugge...
journal_title:Molecular plant pathology
pub_type: 杂志文章
doi:10.1111/mpp.12082
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journal_title:Molecular plant pathology
pub_type: 杂志文章
doi:10.1111/mpp.12717
更新日期:2018-11-01 00:00:00
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pub_type: 杂志文章
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journal_title:Molecular plant pathology
pub_type: 杂志文章
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更新日期:2013-04-01 00:00:00
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journal_title:Molecular plant pathology
pub_type: 杂志文章
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pub_type: 杂志文章
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更新日期:2004-09-01 00:00:00
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journal_title:Molecular plant pathology
pub_type: 杂志文章
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journal_title:Molecular plant pathology
pub_type: 杂志文章
doi:10.1111/mpp.13031
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pub_type: 杂志文章
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更新日期:2007-07-01 00:00:00
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journal_title:Molecular plant pathology
pub_type: 杂志文章,评审
doi:10.1111/mpp.12723
更新日期:2018-11-01 00:00:00
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journal_title:Molecular plant pathology
pub_type: 杂志文章
doi:10.1111/j.1364-3703.2007.00385.x
更新日期:2007-03-01 00:00:00
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journal_title:Molecular plant pathology
pub_type: 杂志文章
doi:10.1111/j.1364-3703.2009.00555.x
更新日期:2009-09-01 00:00:00
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journal_title:Molecular plant pathology
pub_type: 杂志文章
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pub_type: 杂志文章
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pub_type: 杂志文章
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journal_title:Molecular plant pathology
pub_type: 杂志文章
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更新日期:2017-01-01 00:00:00
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journal_title:Molecular plant pathology
pub_type: 杂志文章
doi:10.1111/j.1364-3703.2008.00480.x
更新日期:2008-09-01 00:00:00
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journal_title:Molecular plant pathology
pub_type: 杂志文章
doi:10.1111/mpp.12594
更新日期:2018-05-01 00:00:00
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journal_title:Molecular plant pathology
pub_type: 杂志文章
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更新日期:2000-01-01 00:00:00
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journal_title:Molecular plant pathology
pub_type: 杂志文章
doi:10.1111/j.1364-3703.2007.00437.x
更新日期:2008-01-01 00:00:00
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pub_type: 杂志文章
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pub_type: 杂志文章
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journal_title:Molecular plant pathology
pub_type: 杂志文章
doi:10.1111/mpp.12910
更新日期:2020-04-01 00:00:00
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journal_title:Molecular plant pathology
pub_type: 杂志文章
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