Campus Units
Plant Pathology and Microbiology, Statistics
Document Type
Article
Publication Version
Published Version
Publication Date
9-2004
Journal or Book Title
The Plant Cell
Volume
16
Issue
9
First Page
2514
Last Page
2528
DOI
10.1105/tpc.104.023382
Abstract
Plant recognition of pathogen-derived molecules influences attack and counterattack strategies that affect the outcome of host–microbe interactions. To ascertain the global framework of host gene expression during biotrophic pathogen invasion, we analyzed in parallel the mRNA abundance of 22,792 host genes throughout 36 (genotype × pathogen × time) interactions between barley (Hordeum vulgare) and Blumeria graminis f. sp hordei (Bgh), the causal agent of powdery mildew disease. A split-split-plot design was used to investigate near-isogenic barley lines with introgressed Mla6, Mla13, and Mla1 coiled-coil, nucleotide binding site, Leu-rich repeat resistance alleles challenged with Bgh isolates 5874 (AvrMla6 and AvrMla1) and K1 (AvrMla13 and AvrMla1). A linear mixed model analysis was employed to identify genes with significant differential expression (P value < 0.0001) in incompatible and compatible barley-Bgh interactions across six time points after pathogen challenge. Twenty-two host genes, of which five were of unknown function, exhibited highly similar patterns of upregulation among all incompatible and compatible interactions up to 16 h after inoculation (hai), coinciding with germination of Bgh conidiospores and formation of appressoria. By contrast, significant divergent expression was observed from 16 to 32 hai, during membrane-to-membrane contact between fungal haustoria and host epidermal cells, with notable suppression of most transcripts identified as differentially expressed in compatible interactions. These findings provide a link between the recognition of general and specific pathogen-associated molecules in gene-for-gene specified resistance and support the hypothesis that host-specific resistance evolved from the recognition and prevention of the pathogen's suppression of plant basal defense.
Rights
Works produced by employees of the U.S. Government as part of their official duties are not copyrighted within the U.S. The content of this document is not copyrighted.
Language
en
File Format
application/pdf
Recommended Citation
Caldo, Rico A.; Nettleton, Dan; and Wise, Roger P., "Interaction-Dependent Gene Expression in Mla-Specified Response to Barley Powdery Mildew" (2004). Statistics Publications. 220.
https://lib.dr.iastate.edu/stat_las_pubs/220
Included in
Cell and Developmental Biology Commons, Molecular Genetics Commons, Plant Breeding and Genetics Commons, Plant Pathology Commons, Statistical Models Commons
Comments
This article is published as Caldo, Rico A., Dan Nettleton, and Roger P. Wise. "Interaction-dependent gene expression in Mla-specified response to barley powdery mildew." The Plant Cell 16, no. 9 (2004): 2514-2528. doi: 10.1105/tpc.104.023382.