Calendar Name: seminars
Scheduled for: Monday, October 8 2012, 11:00 - 12:30
Event text: Prof Jaakko Kangasj�rvi
Division of Plant Biology
Department of Biosciences
University of Helsinki
Helsinki
FINLAND
Details: �Apoplastic ROS and cellular signaling � processes and
components involved �
ABSTRACT
Effective responses to external and internal stimuli
will ensure optimal growth and survival in an
environment where productivity and product quality are
adversely affected by stresses. Plants must have
effective means of adapting to changes in their
environment. The main features of such defense
strategies involve early recognition and perception of
the developing stress, and subsequent activation of
induced adaptive and defensive responses. Strong
evidence has accumulated that ROS play an important role
in the signaling under both abiotic and biotic stresses.
The air pollutant ozone generates reactive oxygen
species (ROS) in the apoplast. Consequently, ozone has
been used as a tool to unravel in planta ROS-induced
processes and apoplastic ROS sensing. Examples of
identification of the molecular identity of some
components, and interaction between multiple regulatory
cascades involving apoplastic ROS, discovered with this
approach are presented.
