Thu. 7 Jun, 2018

UPSC Cutting-Edge Seminar: Julia A. Vorholt

Thu. 7 Jun, 2018 14:00 - 15:00
UPSC Cutting-Edge Seminar

Julia A. Vorholt
Institute of Microbiology, Department of Biology, ETH Zurich, Switzerland

Title: The leaf microbiota: disassembling and rebuilding to explore plant microbe interactions

Host: Johannes Hanson

Lab web page:
http://www.micro.biol.ethz.ch/research/vorholt.html


Abstract:

The aerial parts of the plants, which are dominated by leaves, represent one of the largest terrestrial habitats for microorganisms. There is a growing interest to study commensal bacteria to elucidate their interactions with the plants, among each other and to learn how they withstand the hostile conditions of their habitat. A predominance of Proteobacteria, Actinobacteria and Bacteroidetes living in the phyllosphere of numerous plants has been revealed, while metagenomics and metaproteomics approaches gave insights into the general bacterial adaptation strategies to the phyllosphere. We conducted large-scale experiments to isolate Arabidopsis thaliana leaf bacteria as pure cultures. Individual plants as well as individual leaves were sampled at different European sites to determine their core leaf community and to establish a reference strain collection using flow cytometry and dilution series plating. After identifying approximately 3,000 isolates using a high-throughput DNA sequencing-based method we selected more than 200 representative strains belonging to 52 genera of the major phyllosphere phyla covering the majority of the culture-independent taxonomic diversity. Draft genomes of all selected isolates were generated. Recolonization experiments using synthetic communities in a gnotobiotic model system showed reproducible colonization patterns and represents a valuable starting point to identify mechanisms of community formation and function. Examination of plant responses to its microbiota revealed that the plant reacts differently to members of its natural phyllosphere microbiota. A subset of commensals increase expression of defense-related genes and thereby contribute to plant health and performance.


Selected papers (by Johannes):

Bai, Y., Müller, D.B., Srinivas, G., Garrido-Oter, R., Potthoff, E., Rott, M., Dombrowski, N., Münch, P.C., Spaepen, S., Remus-Emsermann, M., et al. (2015). Functional overlap of the Arabidopsis leaf and root microbiota. Nature 528, 364–369.

Delmotte, N., Knief, C., Chaffron, S., Innerebner, G., Roschitzki, B., Schlapbach, R., Mering, von, C., and Vorholt, J.A. (2009). Community proteogenomics reveals insights into the physiology of phyllosphere bacteria. PNAS 106, 16428–16433.

Peyraud, R., Kiefer, P., Christen, P., Massou, S., Portais, J.-C., and Vorholt, J.A. (2009). Demonstration of the ethylmalonyl-CoA pathway by using 13C metabolomics. PNAS 106, 4846–4851.

Publication list:

http://www.micro.biol.ethz.ch/research/vorholt/publications.html

Fri. 8 Jun, 2018

Departmental meeting fysbot (UmU) (APT möte)

Fri. 8 Jun, 2018 9:00 - 10:00

PhD Thesis Defence: Daria Chrobok

Fri. 8 Jun, 2018 10:00 - 13:00
Thesis defence

Daria Chrobok
Department of Plant Physiology

Title: To "leaf" or not to "leaf" - Understanding the metabolic adjustments associated with leaf senescence

Faculty opponent: David Macherel, IRHS-MitoStress, University of Angers, France

Supervisor: Olivier Keech, Per Gardeström

Mon. 11 Jun, 2018

UPSC Monday Seminar 2018

Mon. 11 Jun, 2018 9:00 - 10:00
UPSC Monday Seminar 2018

9:00 Vikash Kumar

Title: New annotations and functional characterization CAZymes in P. trichocarpa v3.0

Supervisor: Ewa Mellerowicz

9:30 Tamara Hernández-Verdeja

Title: Redox regulation of the Plastid-Encoded Polymerase during chloroplast development

Supervisor: Åsa Strand


Place: Lilla hörsalen
Time: 9:00-10:00

Contact: Anne Honsel

UPSC all meeting

Mon. 11 Jun, 2018 10:15 - 11:15

UPSC Seminar: Tuija Aronen

Mon. 11 Jun, 2018 14:00 - 15:00
UPSC Seminar

Tuija Aronen
Natural Resources Institute Finland (Luke), Helsinki, Finland

Title: Somatic embryogenesis of Norway spruce in Finland – on a way from research to applications

Host: Ulrika Egertsdotter

Tue. 12 Jun, 2018

UPSC Board Meeting 2018-06-12

Tue. 12 Jun, 2018 9:00 - 11:00

Master thesis presentation: Sara Westman

Tue. 12 Jun, 2018 13:00 - 14:00
Master thesis presentation

Sara Westman

Department of Plant Physiology, Umeå University

Title: Can vitamins applied during the seed stage enhance herbivore resistance in Arabidopsis thaliana plants?

Supervisor: Benedicte Albrectsen

Master thesis presentation: Cecilia Ström

Tue. 12 Jun, 2018 14:00 - 15:00
Master thesis presentation

Cecilia Ström

Department of Plant Physiology, Umeå University

Title: SLI1-mediated resistance to Myzus persicae aphids: Implications of transcription and temperature

Supervisor: Karen Kloth, Benedicte Albrectsen 

Mon. 18 Jun, 2018

UPSC Monday Seminar 2018

Mon. 18 Jun, 2018 9:00 - 10:00
UPSC Monday Seminar 2018

9:00 Vasiliki Zacharaki
Department of Plant Physiology

Title: How Trehalose-6-Phosphate Synthase 1 (TPS1) controls flowering time in A. thaliana?

Supervisor: Markus Schmid

9:30 Tomas Funda
Department of Forest Genetics and Plant Physiology

Title: Applying FTIR spectroscopy for modeling chemical composition of wood in Scots pine

Supervisor: Harry Xiaming Wu

Place: Lilla hörsalen
Time: 9:00-10:00

Contact: Anne Honsel

PI meeting

Mon. 18 Jun, 2018 10:00 - 11:30

UPSC Seminar: Aimin Wu

Mon. 18 Jun, 2018 14:00 - 15:00
UPSC Seminar

Aimin Wu
College of Forestry and Landscape Architecture, South China Agricultural University, China

Title: The biosynthesis of the nucleotide sugar UDP-Xylose in Arabidopsis

Host: Totte Niittylä

Wed. 20 Jun, 2018

UPSC Seminar: Thomas Jacobs

Wed. 20 Jun, 2018 10:00 - 11:00
UPSC Seminar

Thomas Jacobs
VIB-UGent Center for Plant Systems Biology, Gent, Belgium

Title: How do you CRISPR? Simplifying genome editing projects and avoiding common pitfalls

Host: Ove Nilsson

Mon. 25 Jun, 2018

ICAR 2018 - Turku, Finland

All day
29th International Conference on Arabidopsis Research (ICAR 2018)

25 - 29 June 2018

Turku, Finland

More information: http://icar2018.arabidopsisresearch.org

Tue. 26 Jun, 2018

ICAR 2018 - Turku, Finland

All day
29th International Conference on Arabidopsis Research (ICAR 2018)

25 - 29 June 2018

Turku, Finland

More information: http://icar2018.arabidopsisresearch.org

Wed. 27 Jun, 2018

Master thesis presentation: Benie Diane Nyirarukundo

Wed. 27 Jun, 2018 10:00 - 11:00
Master thesis presentation

Benie Diane Nyirarukundo

Department of Forest Genetics and Plant Physiology (SLU)

Title: Studying the role of microtubule and cellulose during apical hook development in Arabidopsis thaliana

Supervisor: Rishi P. Bhalerao

ICAR 2018 - Turku, Finland

All day
29th International Conference on Arabidopsis Research (ICAR 2018)

25 - 29 June 2018

Turku, Finland

More information: http://icar2018.arabidopsisresearch.org

Thu. 28 Jun, 2018

ICAR 2018 - Turku, Finland

All day
29th International Conference on Arabidopsis Research (ICAR 2018)

25 - 29 June 2018

Turku, Finland

More information: http://icar2018.arabidopsisresearch.org

Fri. 29 Jun, 2018

ICAR 2018 - Turku, Finland

All day
29th International Conference on Arabidopsis Research (ICAR 2018)

25 - 29 June 2018

Turku, Finland

More information: http://icar2018.arabidopsisresearch.org
Powered by JCal Pro - the Joomla Calendar