Cell-Autonomous Expression of Barley Mla1 Confers Race-Specific Resistance to the Powdery Mildew Fungus via a Rar1-Independent Signaling Pathway
Identifieur interne : 000B44 ( Main/Exploration ); précédent : 000B43; suivant : 000B45Cell-Autonomous Expression of Barley Mla1 Confers Race-Specific Resistance to the Powdery Mildew Fungus via a Rar1-Independent Signaling Pathway
Auteurs : Fasong Zhou [Royaume-Uni] ; Joachim Kurth [Royaume-Uni] ; Fusheng Wei [États-Unis] ; Candace Elliott [Royaume-Uni] ; Giampiero Valè [Royaume-Uni] ; Nabila Yahiaoui [Suisse] ; Beat Keller [Suisse] ; Shauna Somerville [États-Unis] ; Roger Wise [États-Unis] ; Paul Schulze-Lefert [Royaume-Uni]Source :
- The Plant Cell [ 1040-4651 ] ; 2001.
Abstract
The barley
Url:
PubMed: 11226189
PubMed Central: 102246
Affiliations:
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Confers Race-Specific Resistance to the Powdery Mildew Fungus via a <italic>Rar1</italic>
-Independent Signaling Pathway</title>
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<sourceDesc><biblStruct><analytic><title xml:lang="en" level="a" type="main">Cell-Autonomous Expression of Barley <italic>Mla1</italic>
Confers Race-Specific Resistance to the Powdery Mildew Fungus via a <italic>Rar1</italic>
-Independent Signaling Pathway</title>
<author><name sortKey="Zhou, Fasong" sort="Zhou, Fasong" uniqKey="Zhou F" first="Fasong" last="Zhou">Fasong Zhou</name>
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<author><name sortKey="Kurth, Joachim" sort="Kurth, Joachim" uniqKey="Kurth J" first="Joachim" last="Kurth">Joachim Kurth</name>
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<author><name sortKey="Wei, Fusheng" sort="Wei, Fusheng" uniqKey="Wei F" first="Fusheng" last="Wei">Fusheng Wei</name>
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<country xml:lang="fr">États-Unis</country>
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<author><name sortKey="Elliott, Candace" sort="Elliott, Candace" uniqKey="Elliott C" first="Candace" last="Elliott">Candace Elliott</name>
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<author><name sortKey="Vale, Giampiero" sort="Vale, Giampiero" uniqKey="Vale G" first="Giampiero" last="Valè">Giampiero Valè</name>
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<author><name sortKey="Yahiaoui, Nabila" sort="Yahiaoui, Nabila" uniqKey="Yahiaoui N" first="Nabila" last="Yahiaoui">Nabila Yahiaoui</name>
<affiliation wicri:level="4"><nlm:aff id="aff3">Institute of Plant Biology, University of Zürich, Zollikerstrasse 107, CH-8008 Zürich, Switzerland</nlm:aff>
<country xml:lang="fr">Suisse</country>
<wicri:regionArea>Institute of Plant Biology, University of Zürich, Zollikerstrasse 107, CH-8008 Zürich</wicri:regionArea>
<orgName type="university">Université de Zurich</orgName>
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<author><name sortKey="Keller, Beat" sort="Keller, Beat" uniqKey="Keller B" first="Beat" last="Keller">Beat Keller</name>
<affiliation wicri:level="4"><nlm:aff id="aff3">Institute of Plant Biology, University of Zürich, Zollikerstrasse 107, CH-8008 Zürich, Switzerland</nlm:aff>
<country xml:lang="fr">Suisse</country>
<wicri:regionArea>Institute of Plant Biology, University of Zürich, Zollikerstrasse 107, CH-8008 Zürich</wicri:regionArea>
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<author><name sortKey="Somerville, Shauna" sort="Somerville, Shauna" uniqKey="Somerville S" first="Shauna" last="Somerville">Shauna Somerville</name>
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<placeName><region type="state">Californie</region>
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<author><name sortKey="Wise, Roger" sort="Wise, Roger" uniqKey="Wise R" first="Roger" last="Wise">Roger Wise</name>
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<series><title level="j">The Plant Cell</title>
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<front><div type="abstract" xml:lang="en"><p>The barley <italic>Mla</italic>
locus encodes 28 characterized resistance specificities to the biotrophic fungal pathogen barley powdery mildew. We describe a single-cell transient expression assay using entire cosmid DNAs to pinpoint <italic>Mla1</italic>
within the complex 240-kb <italic>Mla</italic>
locus. The MLA1 cDNA encodes a 108-kD protein containing an N-terminal coiled-coil structure, a central nucleotide binding domain, and a C-terminal leucine-rich repeat region; it also contains a second short open reading frame at the 5′ end that has a possible regulatory function. Although most <italic>Mla-</italic>
encoded resistance specificities require <italic>Rar1</italic>
for their function, we used the single-cell expression system to demonstrate that <italic>Mla1</italic>
triggers full resistance in the presence of the severely defective <italic>rar1-2</italic>
mutant allele. Wheat contains an ortholog of barley <italic>Mla</italic>
, designated <italic>TaMla</italic>
, that is tightly linked to (0.7 centimorgan) but distinct from a tested resistance specificity at the complex <italic>Pm3</italic>
locus to wheat powdery mildew. Thus, the most polymorphic powdery mildew resistance loci in barley and wheat may have evolved in parallel at two closely linked homeoloci. Barley <italic>Mla1</italic>
expressed in wheat using the single-cell transformation system failed to trigger a response to any of the wheat powdery mildew <italic>Avr</italic>
genes tested, indicating that <italic>AvrMla1</italic>
is not genetically fixed in wheat mildew strains.</p>
</div>
</front>
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<li>États-Unis</li>
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<li>Iowa</li>
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<orgName><li>Université de Zurich</li>
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</noRegion>
<name sortKey="Elliott, Candace" sort="Elliott, Candace" uniqKey="Elliott C" first="Candace" last="Elliott">Candace Elliott</name>
<name sortKey="Kurth, Joachim" sort="Kurth, Joachim" uniqKey="Kurth J" first="Joachim" last="Kurth">Joachim Kurth</name>
<name sortKey="Schulze Lefert, Paul" sort="Schulze Lefert, Paul" uniqKey="Schulze Lefert P" first="Paul" last="Schulze-Lefert">Paul Schulze-Lefert</name>
<name sortKey="Vale, Giampiero" sort="Vale, Giampiero" uniqKey="Vale G" first="Giampiero" last="Valè">Giampiero Valè</name>
</country>
<country name="États-Unis"><region name="Iowa"><name sortKey="Wei, Fusheng" sort="Wei, Fusheng" uniqKey="Wei F" first="Fusheng" last="Wei">Fusheng Wei</name>
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<name sortKey="Somerville, Shauna" sort="Somerville, Shauna" uniqKey="Somerville S" first="Shauna" last="Somerville">Shauna Somerville</name>
<name sortKey="Wise, Roger" sort="Wise, Roger" uniqKey="Wise R" first="Roger" last="Wise">Roger Wise</name>
<name sortKey="Wise, Roger" sort="Wise, Roger" uniqKey="Wise R" first="Roger" last="Wise">Roger Wise</name>
</country>
<country name="Suisse"><region name="Canton de Zurich"><name sortKey="Yahiaoui, Nabila" sort="Yahiaoui, Nabila" uniqKey="Yahiaoui N" first="Nabila" last="Yahiaoui">Nabila Yahiaoui</name>
</region>
<name sortKey="Keller, Beat" sort="Keller, Beat" uniqKey="Keller B" first="Beat" last="Keller">Beat Keller</name>
</country>
</tree>
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