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A functional EDS1 ortholog is differentially regulated in powdery mildew resistant and susceptible grapevines and complements an Arabidopsis eds1 mutant

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Planta : Volume 231, Issue 4, March 2010

Planta : Volume 231, Issue 3, February 2010

Planta : Volume 231, Issue 2, January 2010

Planta : Volume 231, Issue 1, December 2009

A functional EDS1 ortholog is differentially regulated in powdery mildew resistant and susceptible grapevines and complements an Arabidopsis eds1 mutant

Content Provider	Springer Nature Link
Author	Gao, Fei Shu, Xiaomei Ali, Mohammad Babar Howard, Susanne Li, Nan Winterhagen, Patrick Qiu, Wenping Gassmann, Walter
Copyright Year	2010
Abstract	Vitis vinifera (grapevine) is the most economically important deciduous fruit crop, but cultivated grapevine varieties lack adequate innate immunity to a range of devastating diseases. To identify genetic resources for grapevine innate immunity and understand pathogen defense pathways in a woody perennial plant, we focus in this study on orthologs of the central Arabidopsis thaliana defense regulator ENHANCED DISEASE SUSCEPTIBILITY1 (EDS1). The family of EDS1-like genes is expanded in grapevine, and members of this family were previously found to be constitutively upregulated in the resistant variety ‘Norton’ of the North American grapevine species Vitis aestivalis, while they were induced by Erysiphe necator, the causal agent of grapevine powdery mildew (PM), in the susceptible V. vinifera variety ‘Cabernet Sauvignon’. Here, we determine the responsiveness of individual EDS1-like genes in grapevine to PM and salicylic acid, and find that EDS1-like paralogs are differentially regulated in ‘Cabernet Sauvignon’, while two are constitutively upregulated in ‘Norton’. Sequencing of VvEDS1 and VaEDS1 cDNA and genomic clones revealed high conservation in the protein-encoding sequence and some divergence of the promoter sequence in the two grapevine varieties. Complementation of the Arabidopsiseds1-1 mutant showed that the EDS1-like gene with highest predicted amino acid sequence similarity to AtEDS1 from either grapevine varieties is a functional ortholog of AtEDS1. Together, our analyses show that differential susceptibility to PM is correlated with differences in EDS1 expression, not differences in EDS1 function, between resistant ‘Norton’ and susceptible ‘Cabernet Sauvignon’.
Starting Page	1037
Ending Page	1047
Page Count	11
File Format	PDF
ISSN	00320935
Journal	Planta
Volume Number	231
Issue Number	5
e-ISSN	14322048
Language	English
Publisher	Springer-Verlag
Publisher Date	2010-02-10
Publisher Place	Berlin/Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Vitis vinifera Vitis aestivalis Powdery mildew Disease resistance Arabidopsis Ecology Forestry Agriculture Plant Sciences
Content Type	Text
Resource Type	Article
Subject	Genetics Plant Science

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A functional EDS1 ortholog is differentially regulated in powdery mildew resistant and susceptible grapevines and complements an Arabidopsis eds1 mutant