The ENHANCED MAGNAPORTHE RESISTANCE 1 locus affects Ramularia leaf spot development in barley
| Autor: | Graham R. D. McGrann, Neil D. Havis, Steven Miller |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
0106 biological sciences
0301 basic medicine Genetics Ramularia Mildew Magnaporthe biology Blumeria graminis Locus (genetics) Plant Science Horticulture biology.organism_classification 01 natural sciences Endophyte 03 medical and health sciences 030104 developmental biology Leaf spot Agronomy and Crop Science Powdery mildew 010606 plant biology & botany |
| Zdroj: | European Journal of Plant Pathology. 156:123-132 |
| ISSN: | 1573-8469 0929-1873 |
| DOI: | 10.1007/s10658-019-01869-x |
| Popis: | Ramularia leaf spot (RLS) is a newly-important disease of barley which is caused when the fungus Ramularia collo-cygni enters necrotrophic development during colonisation of the host. Mutant alleles at the barley MILDEW LOCUS O, mlo, locus confer broad spectrum durable resistance against the powdery mildew fungus, Blumeria graminis f. sp. hordei, but can enhance susceptibility to pathogens with necrotrophic development stages such as R. collo-cygni. Given the importance of mlo in spring barley breeding programmes, identifying loci that mitigate the effect of mlo-mediated susceptibility on necrotrophic disease development is an important target. Mutation of the ENHANCED MAGNAPORTHE 1 (emr1) locus which can affect mlo-associated disease susceptibility, leads to a reduction in RLS symptoms on barley leaves but does not reduce R. collo-cygni accumulation. The effect of emr1 on the transition of R. collo-cygni from endophyte to necrotroph may relate to changes in reactive oxygen species in mutant plants which show reduced sensitivity to chloroplastic superoxide induced cell death and has lower relative chlorophyll content compared to mlo plants. |
| Databáze: | OpenAIRE |
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