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Proceedings of the National Academy of Sciences of the United States of America
1998
Feb
;
(4)
:0
Expression of Xa1, a bacterial blight-resistance gene in rice, is induced by bacterial inoculation.
Yoshimura S
,
Yamanouchi U
,
Katayose Y
,
Toki S
,
Wang ZX
,
Kono I
,
Kurata N
,
Yano M
,
Iwata N
,
Sasaki T
Abstract
The Xa1 gene in rice confers resistance to Japanese race 1 of Xanthomonas oryzae pv. oryzae, the causal pathogen of bacterial blight (BB). We isolated the Xa1 gene by a map-based cloning strategy. The deduced amino acid sequence of the Xa1 gene product contains nucleotide binding sites (NBS) and a new type of leucine-rich repeats (LRR); thus, Xa1 is a member of the NBS-LRR class of plant disease-resistance genes, but quite different from Xa21, another BB-resistance gene isolated from rice. Interestingly, Xa1 gene expression was induced on inoculation with a bacterial pathogen and wound, unlike other isolated resistance genes in plants, which show constitutive expression. The induced expression may be involved in enhancement of resistance against the pathogen.
DHARA ID:
D027490
Pubmed ID:
9465073
Access to Full Paper Not Available
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