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A B‐lectin receptor kinase gene conferring rice blast resistance

A B‐lectin receptor kinase gene conferring rice blast resistance Rice blast, caused by the fungal pathogen Magnaporthe grisea, is one of the most devastating diseases in rice worldwide. The dominant resistance gene, Pi‐d2 [previously named Pi‐d(t)2], present in the rice variety Digu, confers gene‐for‐gene resistance to the Chinese blast strain, ZB15. Pi‐d2 was previously mapped close to the centromere of chromosome 6. In this study, the Pi‐d2 gene was isolated by a map‐based cloning strategy. Pi‐d2 encodes a receptor‐like kinase protein with a predicted extracellular domain of a bulb‐type mannose specific binding lectin (B‐lectin) and an intracellular serine–threonine kinase domain. Pi‐d2 is a single‐copy gene that is constitutively expressed in the rice variety Digu. Transgenic plants carrying the Pi‐d2 transgene confer race‐specific resistance to the M. grisea strain, ZB15. The Pi‐d2 protein is plasma membrane localized. A single amino acid difference at position 441 of Pi‐d2 distinguishes resistant and susceptible alleles of rice blast resistance gene Pi‐d2. Because of its novel extracellular domain, Pi‐d2 represents a new class of plant resistance genes. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png The Plant Journal Wiley

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References (46)

Publisher
Wiley
Copyright
Copyright © 2006 Wiley Subscription Services, Inc., A Wiley Company
ISSN
0960-7412
eISSN
1365-313X
DOI
10.1111/j.1365-313X.2006.02739.x
pmid
16709195
Publisher site
See Article on Publisher Site

Abstract

Rice blast, caused by the fungal pathogen Magnaporthe grisea, is one of the most devastating diseases in rice worldwide. The dominant resistance gene, Pi‐d2 [previously named Pi‐d(t)2], present in the rice variety Digu, confers gene‐for‐gene resistance to the Chinese blast strain, ZB15. Pi‐d2 was previously mapped close to the centromere of chromosome 6. In this study, the Pi‐d2 gene was isolated by a map‐based cloning strategy. Pi‐d2 encodes a receptor‐like kinase protein with a predicted extracellular domain of a bulb‐type mannose specific binding lectin (B‐lectin) and an intracellular serine–threonine kinase domain. Pi‐d2 is a single‐copy gene that is constitutively expressed in the rice variety Digu. Transgenic plants carrying the Pi‐d2 transgene confer race‐specific resistance to the M. grisea strain, ZB15. The Pi‐d2 protein is plasma membrane localized. A single amino acid difference at position 441 of Pi‐d2 distinguishes resistant and susceptible alleles of rice blast resistance gene Pi‐d2. Because of its novel extracellular domain, Pi‐d2 represents a new class of plant resistance genes.

Journal

The Plant JournalWiley

Published: Jun 1, 2006

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