Abstract:
:Amongst the universal diseases affecting apples, blue mould caused by Penicillium expansum is a major concern, resulting in yield and quality losses as a result of the production of the mycotoxin patulin. Despite the characterization of the patulin biosynthetic gene cluster at both the molecular and chemical levels, the underlying regulation of patulin biosynthesis in P. expansum and the mechanisms of apple colonization remain largely obscure. Recent work has indicated that sucrose, a carbon catabolite repressive metabolite, is a critical factor in the regulation of patulin synthesis. Here, CreA, the global carbon catabolite regulator, was assessed for virulence both in vitro and in vivo. We showed that loss-of-function creA strains were nearly avirulent and did not produce patulin in apples. On the basis of RNA-sequencing (RNA-seq) analysis and physiological experimentation, these mutants were unable to successfully colonize apples for a multitude of potential mechanisms including, on the pathogen side, a decreased ability to produce proteolytic enzymes and to acidify the environment and impaired carbon/nitrogen metabolism and, on the host side, an increase in the oxidative defence pathways. Our study defines CreA and its downstream signalling pathways as promising targets for the development of strategies to fight against the development and virulence of this post-harvest pathogen.
journal_name
Mol Plant Patholjournal_title
Molecular plant pathologyauthors
Tannous J,Kumar D,Sela N,Sionov E,Prusky D,Keller NPdoi
10.1111/mpp.12734subject
Has Abstractpub_date
2018-12-01 00:00:00pages
2635-2650issue
12eissn
1464-6722issn
1364-3703journal_volume
19pub_type
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pub_type: 杂志文章,评审
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doi:10.1111/j.1364-3703.2007.00419.x
更新日期:2007-09-01 00:00:00
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pub_type: 杂志文章
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更新日期:2019-01-01 00:00:00