CANCELLED: Friday seminar: Everlasting flowers and defense against bacterial pathogens – What is the connection?

By Melinka A. Butenko, Department of Biosciences, University of Oslo

Photo of speaker Melinka A. Butenko

Unfortunately, this seminar has been postponed. A new date and time will be announced later.

Abstract

The research activities in my lab have a focus on how plants use small peptide ligands and plasma-membrane receptor proteins to regulate important developmental processes and to respond to both biotic and abiotic stresses. The lab has for a long time worked on elucidating the genetic networks that controls abscission (organ loss) of Arabidopsis floral organs. Abscission is an active, highly regulated process in the life span of a plant and has a variety of roles during plant development. Roles such as efficient dispersal or propagation of the plant secured by the shedding of pollen, fruits, and seeds; The shedding of unwanted or unneeded organs, such as the flower after aiding in pollination, And lastly damaged or infected organs may be rapidly shed as a defence mechanism.

In Arabidopsis floral abscission is tightly regulated by the peptide ligand INFLORESCENCE DEFICIENT IN ABSCISSION (IDA) relaying a signal through the Leucine-rich repeat (LRR) receptor-like kinases (RLK) HAESA (HAE) and HAESA-LIKE 2 (HSL2) and inducing a signalling cascade including MAP kinases, MADS box and KNOX transcription factors. 
Recent work in the lab indicates a role for the IDA signalling pathway as a mediator of stress induced responses such as pathogens. Here I will present new data showing how a single peptide can regulate separate biological processes by recruiting different receptor complexes and downstream effectors of signalling. I will discuss the significance of localised defence responses for plant survival and adaptation.

Melinka A. Butenko, Section for Genetics and Evolutionary Biology, Department of Biosciences, University of Oslo

Published Jan. 27, 2020 2:42 PM - Last modified Mar. 11, 2020 12:53 PM