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PMID: 9596635 Published · ppublish English Journal Article Research Support, Non-U.S. Gov't Research Support, U.S. Gov't, Non-P.H.S. Research Support, U.S. Gov't, P.H.S.

Xa21D encodes a receptor-like molecule with a leucine-rich repeat domain that determines race-specific recognition and is subject to adaptive evolution.

The Plant cell ·Vol. 10 ·No. 5 ·1998-05-00 ·Pages 765-79

Wang GL, Ruan DL, Song WY, Sideris S, Chen L, Pi LY, Zhang S, Zhang Z, Fauquet C, Gaut BS, Whalen MC, Ronald PC

Abstract

The rice Xa21 gene confers resistance to Xanthomonas oryzae pv oryzae in a race-specific manner. Analysis of the inheritance patterns and resistance spectra of transgenic plants carrying six Xa21 gene family members indicated that one member, designated Xa21D, displayed a resistance spectrum identical to that observed for Xa21 but conferred only partial resistance. Xa21D encodes a receptor-like protein carrying leucine-rich repeat (LRR) motifs in the presumed extracellular domain. The Xa21D transcript terminates shortly after the stop codon introduced by the retrotransposon Retrofit. Comparison of nucleotide substitutions in the LRR coding regions of Xa21 and Xa21D provided evidence of adaptive selection. Both functional and evolutionary evidence indicates that the Xa21D LRR domain controls race-specific pathogen recognition.

MeSH Terms
Adaptation, Physiological Amino Acid Sequence Biological Evolution Dimerization Disease Susceptibility Evolution, Molecular Leucine Molecular Sequence Data Multigene Family Oryza/genetics,microbiology,physiology Plant Diseases Plant Proteins/biosynthesis,chemistry,genetics Plants, Genetically Modified Polymerase Chain Reaction Protein Serine-Threonine Kinases/biosynthesis,chemistry,genetics Receptors, Cell Surface/biosynthesis,genetics Retroelements Sequence Alignment Xanthomonas/genetics,pathogenicity
Chemicals
Plant Proteins Receptors, Cell Surface Retroelements Xa21 protein, Oryza sativa Protein Serine-Threonine Kinases Leucine
Authors & Affiliations
12 authors, click to expand affiliations / ORCID
Wang G L
Department of Plant Pathology, University of California at Davis, 1 Shields Avenue, Davis, California 95616, USA.
Ruan D L
Song W Y
Sideris S
Chen L
Pi L Y
Zhang S
Zhang Z
Fauquet C
Gaut B S
Whalen M C
Ronald P C
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Article Info
Journal
The Plant cell
Abbr.
Plant Cell
ISSN
1040-4651
DOI
10.1105/tpc.10.5.765
Published
1998-05-00
Pages
765-79
Language
English
Region
England
NLM ID
9208688
PMCID
PMC144027
Subset
IM
Grants
PHS HHS · 47907 · United States
External Links
PubMed source DOI: 10.1105/tpc.10.5.765 PMC Full Text View journal details
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