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Lecture Type

Halle Plant Science Colloquium

Halle Plant Science Colloquium -

Date: 11.06.2019 - 17:00

Speaker: Prof Dr Benedikt Kost

Info:

Location: Lecture Hall E.02, Theodor-Lieser-Str. 9

Lecture Access: Everybody

Host: Prof Dr Ingo Heilmann

Address: University of Erlangen-Nürnberg

IPB Seminar

IPB Seminar - Natural Variation in the Plant Immune System and its Contribution to Hybrid Performances

Date: 11.06.2019 - 10:00

Speaker: Assist. Prof. Eunyoung Chae

Info: Individuals of a species respond differently to environmental perturbations, and the genetic makeup is largely responsible for the variation in responses. With the advent of new sequencing tools that made tremendous genomic information available in a given species [1], we now have an unprecedented opportunity to investigate phenotypic variation in adaptive traits governed by genotype by environment (G x E) and G x G interactions. Numerous genome-sequencing projects revealed that genetic variability in plant immune components is exceptional, reflecting complex defense strategies that plants employ. The extreme variation sometimes makes a fatal outcome. Hybrid necrosis is the best-known example of genetic incompatibility in plants, in which autoimmune responses are triggered by deleterious interactions of independently evolved immune alleles [2]. We exploited genetic and genomic tools available in the model plant species Arabidopsis thaliana to systematically investigate intraspecific hybrid necrosis [3]. The species-wide work identified hot spots for genetic incompatibilities in the genome, often in regions densely populated by Nucleotide-binding Leucine-rich (NLR) immune receptor genes with extreme polymorphisms. A particularly dangerous locus is a highly variable cluster of NLR genes, DANGEROUS MIX2 (DM2), which causes multiple, independent incompatibilities with genes that encode a range of biochemical functions, including other NLRs. Our findings suggest that deleterious interactions of immune components that are presumably at the front lines of host-pathogen co-evolution would limit the combinations of favorable disease resistance alleles accessible to plant genomes. This systems genetics work provides a unique platform to furtherinvestigate molecular mechanisms of immune receptor activation [4] and to dissect tradeoffs between immunity and growth in plants [5]. In my talk, I will address topics on how genetics of speciation and genetic incompatibility contribute to mechanistic understanding of adaptation, how natural variation can be exploited to understand trait evolution, and how current knowledge gained from a model system shall be translated to improve breeding practices.

 

Keywords:plant immunity, natural variation, hybrid necrosis, incompatibility, NLR

 

Suggested readings

1.         1001 Genomes Consortium, 1,135 Genomes Reveal the Global Pattern of Polymorphism in Arabidopsis thaliana. Cell, 2016. 166(2): p. 481-91.

2.         Bomblies, K. and D. Weigel, Hybrid necrosis: autoimmunity as a potential gene-flow barrier in plant species. Nat Rev Genet, 2007. 8(5): p. 382-93.

3.         Chae, E., et al., Species-wide genetic incompatibility analysis identifies immune genes as hot spots of deleterious epistasis. Cell, 2014. 159(6): p. 1341-51.

4.         Tran, D.T.N., et al., Activation of a Plant NLR Complex through Heteromeric Association with an Autoimmune Risk Variant of Another NLR. Curr Biol, 2017. 27(8): p. 1148-1160.

5.         Chae, E., D.T. Tran, and D. Weigel, Cooperation and Conflict in the Plant Immune System. PLoS Pathog, 2016. 12(3): p. e1005452.

Location: Lecture Hall "Kurt-Mothes" of the IPB, Weinberg 3

Lecture Access: Everybody

Host: Justin Lee

Address: National University of Singapore Department of Biological Sciences

Other

Other - IPB Welcome & Orientation Day

Date: 03.05.2019 - 09:00

Speaker: IPB Welcome & Orientation Day

Info: Preliminary Program:
09:00 – 09:30    Presentation of the IPB    Steffen Abel
09:30 – 09:45    Intro to Metabolomics Platform    Gerd Balcke
09:45 – 10:00    Intro to Proteomics Platform    Wolfgang Hoehenwarter
10:00 – 10:15    Intro to Cell Biology Platform    Bettina Hause
10:15 – 10:45    Good Scientific Practice Seminar    Bettina Hause
10:45 – 11:10    PhD Training at the IPB: The Core and LRS PlantBioChem Program    Antje Hellmuth
11:10 – 11:30     Intro PhD Representatives at IPB (tbc)    (tba)

Location: Lecture Hall "Kurt-Mothes" of the IPB, Weinberg 3

Lecture Access: Restricted to IPB Members

Host: Prof. Steffen Abel

Address:

Halle Plant Science Colloquium

Halle Plant Science Colloquium -

Date: 30.04.2019 - 17:00

Speaker: Armin Djamei

Info:

Location: Lecture Hall E.02, Theodor-Lieser-Str. 9

Lecture Access: Everybody

Host: Holger Deising

Address: IPK Gatersleben

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