Plant Developmental Biology and Physiology


Hypoxic stress adaptationHormone

Rice is a semiaquatic plant that is well adapted to flooding. Deepwater rice is an especially well adapted variety that we use to study the mechanisms that have evolved in plants to cope with low oxygen conditions which arise as a result of flooding. Amongst these adaptations are rapid elongation growth of the stem growth of adventitious roots, programmed cell death and metabolic changes. We attempt to elucidate early events in hypoxia signaling and the role of ethylene and other phytohormones in hypoxia responses using proteome, transcriptome and genetic approaches..





Phytosulfokine peptide signalingZwei Studenten und eine Tasse Kaffee

PSK is a disulfated pentapeptide that acts as a growth factor in plants. Work carried out in our group on the model plant Arabidopsis thaliana established that promotion of root growth by PSK occurs mainly through enhanced cell elongation. PSK signaling in the epidermis is sufficient to induce root growth indicating signaling between the epidermis and inner cell layers. PSK is perceived by a leucine-rich repeat receptor kinase. We recently showed that binding of the Ca2+ sensor calmodulin to PSKR1 is required for the growth-promoting activity of this PSK receptor. Currently studies target receptor function and downstream PSK signaling by employing molecular genetics, cytological, biochemical and -omics techniques to identify signaling components, response genes and cellular responses to PSK.