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Cloning and characterization of genes specifically expressed during infection stages in the rice blast fungus

Cloning and characterization of genes specifically expressed during infection stages in the rice blast fungus

FEMS microbiology letters 222(2): 221-227

ISSN/ISBN: 0378-1097

PMID: 12770711

DOI: 10.1016/s0378-1097(03)00307-0

We isolated promoters of 12 genes from the rice blast fungus based on the sequences of randomly selected expressed sequence tags (ESTs) (appressorium formation stage cDNA library of Magnaporthe available from GenBank). These promoters (and the 5' coding regions if any) were fused in frame with egfp, and their expression patterns were examined under the epifluorescence microscope. Among them, two turned out to be specifically active in structures necessary for infection, viz. a promoter of adenylate cyclase interacting protein 1-like gene expressed in conidia, germ tubes, and appressoria, and a promoter of putative membrane-associated or secreted protein gene specifically expressed in appressoria. Although targeted knockout mutants of either gene failed to show detectable phenotypic alterations under laboratory conditions, these ESTs should be useful for identification of genes expressed during infection stages.

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Accession: 003681247

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