Journal
FRONTIERS IN PLANT SCIENCE
Volume 7, Issue -, Pages -Publisher
FRONTIERS MEDIA SA
DOI: 10.3389/fpls.2016.01836
Keywords
pathogen recognition receptor; PRR; 3D model; co-evolution; Hordeum vulgare; Triticum aestivum; Blumeria graminis
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Funding
- German Ministry of Education and Research (BMBL project PRO-GABI)
- BASE Plant Science GmbH (project GABI-non-host II)
- German DEG (project ERA-CAPS DURESTrit)
- Romanian Academy program
- UEFISCDI grant [PN-II-ID-PCE-2011-3-0342]
- UK Biotechnology and Biological Sciences Research Council (BBSRC) award [BB/G024987/1]
- BBSRC [BB/G024987/1, BB/M004929/1] Funding Source: UKRI
- Biotechnology and Biological Sciences Research Council [BB/G024987/1, BB/M004929/1] Funding Source: researchfish
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Pattern recognition receptors (PRRs) belonging to the multigene family of receptor-like kinases (RLKs) are the sensing devices of plants for microbe- or pathogen-associated molecular patterns released from microbial organisms. Here we describe Rnr8 (for Required for non-host resistance 8) encoding HvLEMK1, a LRR-malectin domain containing transmembrane RLK that mediates non-host resistance of barley to the non-adapted wheat powdery mildew fungus Blumeria graminis f.sp. tritici. Transgenic barley lines with silenced HvLEMK1 allow entry and colony growth of the non-adapted pathogen, although sporulation was reduced and final colony size did not reach that of the adapted barley powdery mildew fungus B. graminis f.sp. hordei. Transient expression of the barley or wheat LEMK1 genes enhanced resistance in wheat to the adapted wheat powdery mildew fungus while expression of the same genes did not protect barley from attack by the barley powdery mildew fungus. The results suggest that HyLEMK1 is a factor mediating non-host resistance in barley and quantitative host resistance in wheat to the wheat powdery mildew fungus.
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