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      A gene encoding maize caffeoyl-CoA O-methyltransferase confers quantitative resistance to multiple pathogens

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          Abstract

          Peter Balint-Kurti, Qin Yang and colleagues report that ZmCCoAOMT2, which encodes a caffeoyl-CoA O-methyltransferase, is a gene within the quantitative trait locus qMdr9.02, which confers resistance to southern leaf blight and gray leaf spot. Their findings suggest that resistance might be caused by differences in levels of lignin and other metabolites in the phenylpropanoid pathway.

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          Genome-wide insertional mutagenesis of Arabidopsis thaliana.

          J Alonso (2003)
          Over 225,000 independent Agrobacterium transferred DNA (T-DNA) insertion events in the genome of the reference plant Arabidopsis thaliana have been created that represent near saturation of the gene space. The precise locations were determined for more than 88,000 T-DNA insertions, which resulted in the identification of mutations in more than 21,700 of the approximately 29,454 predicted Arabidopsis genes. Genome-wide analysis of the distribution of integration events revealed the existence of a large integration site bias at both the chromosome and gene levels. Insertion mutations were identified in genes that are regulated in response to the plant hormone ethylene.
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            A putative ABC transporter confers durable resistance to multiple fungal pathogens in wheat.

            Agricultural crops benefit from resistance to pathogens that endures over years and generations of both pest and crop. Durable disease resistance, which may be partial or complete, can be controlled by several genes. Some of the most devastating fungal pathogens in wheat are leaf rust, stripe rust, and powdery mildew. The wheat gene Lr34 has supported resistance to these pathogens for more than 50 years. Lr34 is now shared by wheat cultivars around the world. Here, we show that the LR34 protein resembles adenosine triphosphate-binding cassette transporters of the pleiotropic drug resistance subfamily. Alleles of Lr34 conferring resistance or susceptibility differ by three genetic polymorphisms. The Lr34 gene, which functions in the adult plant, stimulates senescence-like processes in the flag leaf tips and edges.
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              Programmed cell death in the plant immune system.

              Cell death has a central role in innate immune responses in both plants and animals. Besides sharing striking convergences and similarities in the overall evolutionary organization of their innate immune systems, both plants and animals can respond to infection and pathogen recognition with programmed cell death. The fact that plant and animal pathogens have evolved strategies to subvert specific cell death modalities emphasizes the essential role of cell death during immune responses. The hypersensitive response (HR) cell death in plants displays morphological features, molecular architectures and mechanisms reminiscent of different inflammatory cell death types in animals (pyroptosis and necroptosis). In this review, we describe the molecular pathways leading to cell death during innate immune responses. Additionally, we present recently discovered caspase and caspase-like networks regulating cell death that have revealed fascinating analogies between cell death control across both kingdoms.
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                Author and article information

                Journal
                Nature Genetics
                Nat Genet
                Springer Nature
                1061-4036
                1546-1718
                July 24 2017
                July 24 2017
                :
                :
                Article
                10.1038/ng.3919
                28740263
                20562d66-7793-40bc-979e-767c9146f012
                © 2017
                History

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