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- W2153755753 abstract "Summary The L r34 gene encodes an ABC transporter and has provided wheat with durable, broad‐spectrum resistance against multiple fungal pathogens for over 100 years. Because barley does not have an L r34 ortholog, we expressed L r34 in barley to investigate its potential as a broad‐spectrum resistance resource in another grass species. We found that introduction of the genomic L r34 sequence confers resistance against barley leaf rust and barley powdery mildew, two pathogens specific for barley but not virulent on wheat. In addition, the barley lines showed enhanced resistance against wheat stem rust. Transformation with the L r34 cDNA or the genomic susceptible L r34 allele did not result in increased resistance. Unlike wheat, where L r34‐ conferred resistance is associated with adult plants, the genomic L r34 transgenic barley lines exhibited multipathogen resistance in seedlings. These transgenic barley lines also developed leaf tip necrosis ( LTN ) in young seedlings, which correlated with an up‐regulation of senescence marker genes and several pathogenesis‐related ( PR ) genes. In wheat, transcriptional expression of L r34 is highest in adult plants and correlates with increased resistance and LTN affecting the last emerging leaf. The severe phenotype of transgenic L r34 barley resulted in reduced plant growth and total grain weight. These results demonstrate that L r34 provides enhanced multipathogen resistance early in barley plant development and implies the conservation of the substrate and mechanism of the LR 34 transporter and its molecular action between wheat and barley. With controlled gene expression, the use of L r34 may be valuable for many cereal breeding programmes, particularly given its proven durability." @default.
- W2153755753 created "2016-06-24" @default.
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- W2153755753 date "2013-05-28" @default.
- W2153755753 modified "2023-10-18" @default.
- W2153755753 title "The wheat <i><scp>L</scp>r34</i> gene provides resistance against multiple fungal pathogens in barley" @default.
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- W2153755753 doi "https://doi.org/10.1111/pbi.12077" @default.
- W2153755753 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/23711079" @default.
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