MPMI Update 
April 2012

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April Cover
 

Identification of a transcription factor associated with virulence in the necrotrophic fungus, Alternaria brassicicola. The top panel shows lesions on Brassica oleracea after inoculation with conidia of the wild type and a mutant under different conditions. Bottom panel shows similar lesion sizes produced by a complemented mutant and the wild type, compared with smaller lesions produced by the mutant at even greater inoculum concentrations. For the article by Srivastava et al., click here.

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MPMI's Editor's Pick 

Dr. Gary Stacey, Editor-in-Chief

bannerA Zinc-Finger-Family Transcription Factor
Cell wall degrading enzymes are generally thought to play an important role in both fungal and bacterial pathogenicity. However, functional redundancy among the genes encoding these enzymes has made it very difficult to confirm their role genetically. In the April issue of MPMI, Srivastava et al. show that mutations in the transcription factor, Abvf19, significantly reduced virulence of Alternaria brassicicola. Of the 74 genes apparently regulated by Abvf19, 24 encode cell wall degrading enzymes. Read more...
APRIL's MOST READ PAPER 

XopR, a Type III Effector Secreted by Xanthomonas oryzae pv. oryzae, Suppresses Microbe-Associated Molecular Pattern-Triggered Immunity in Arabidopsis thaliana
 
Chiharu Akimoto-Tomiyama, Ayako Furutani, Seiji Tsuge, Erica J. Washington, Yoko Nishizawa, Eiichi Minami, and Hirokazu Ochiai

banner Xanthomonas oryzae pv. oryzae is the causal agent of bacterial blight of rice. The XopR protein, secreted into plant cells through the type III secretion apparatus, is widely conserved in xanthomonads and is predicted to play important roles in bacterial pathogenicity. Here, we examined the function of XopR by constructing transgenic Arabidopsis thaliana plants expressing it under control of the dexamethasone (DEX)-inducible promoter. Collectively, these results suggest that XopR inhibits basal defense responses in plants rapidly after MAMP recognition. Read more...

Top Downloaded Papers in MPMI

Identification of Pathogenesis-Associated Genes by T-DNA-Mediated Insertional Mutagenesis in Botrytis cinerea: A Type 2A Phosphoprotein Phosphatase and an SPT3 Transcription Factor Have Significant Impact on Virulence

Call for Papers - Special MPMI Focus Issue!

Molecular Plant-Nematode and Plant-Insect Interactions

Special Guest Editors: Dr. Geert Smant, Dr. Saskia Hogenhout,
Dr. Melissa G. Mitchum  

  Molecular Plant-Microbe Interactions invites original research manuscripts on the molecular biology and molecular genetics/genomics of parasitic interactions of nematodes and insects with plants for a special 2012 issue. This special issue will bring added attention to critically important research that has shown significant progress in recent years. Three mini-reviews written by key scientists in the field will cover 1) nematode salivary proteins/effectors, 2) aphid salivary proteins/effectors, and 3) nematode-induced feeding structures.

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