rdf:type |
|
lifeskim:mentions |
|
pubmed:issue |
49
|
pubmed:dateCreated |
2006-12-6
|
pubmed:abstractText |
A major class of disease-resistance (R) genes in plants encode nucleotide-binding site/leucine-rich repeat (LRR) proteins. The LRR domains mediate recognition of pathogen-derived elicitors. Here we describe a random in vitro mutation analysis illustrating how mutations in an R protein (Rx) LRR domain generate disease-resistance specificity. The original Rx protein confers resistance only against a subset of potato virus X (PVX) strains, whereas selected mutants were effective against an additional strain of PVX and against the distantly related poplar mosaic virus. These effects of LRR mutations indicate that in vitro evolution of R genes could be exploited for enhancement of disease resistance in crop plants. Our results also illustrate how short-term evolution of disease resistance in wild populations might be toward broader spectrum resistance against multiple strains of the pathogen. The breadth of the disease-resistance phenotype from a natural R gene may be influenced by the tradeoff between the costs and benefits of broad-spectrum disease resistance.
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pubmed:commentsCorrections |
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pubmed:language |
eng
|
pubmed:journal |
|
pubmed:citationSubset |
IM
|
pubmed:status |
MEDLINE
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pubmed:month |
Dec
|
pubmed:issn |
0027-8424
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pubmed:author |
|
pubmed:issnType |
Print
|
pubmed:day |
5
|
pubmed:volume |
103
|
pubmed:owner |
NLM
|
pubmed:authorsComplete |
Y
|
pubmed:pagination |
18828-33
|
pubmed:dateRevised |
2010-9-15
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pubmed:meshHeading |
|
pubmed:year |
2006
|
pubmed:articleTitle |
Artificial evolution extends the spectrum of viruses that are targeted by a disease-resistance gene from potato.
|
pubmed:affiliation |
The Sainsbury Laboratory, John Innes Centre, Norwich NR4 7UH, United Kingdom.
|
pubmed:publicationType |
Journal Article,
Research Support, Non-U.S. Gov't
|