"Utilizing stomatal CO2 signaling for designing water-saving plants"

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Thursday 10 October 2019, 11:00 - 12:30

 
ABSTRACT

Plants are continually balancing the influx of CO2 for photosynthesis against the loss of water through stomatal pores in their leaves. Reduced CO2 levels in the leaf indicate a shortage of substrate for photosynthesis and trigger stomatal opening, while above-ambient CO2 leads to stomatal closure. Plant ‘hormone abscisic acid (ABA) is involved in the regulation of stomatal closure during drought but it also has a role in CO2-induced stomatal regulation. To breed crops that will use less water in a future climate we need to know how plants sense and respond to ABA and CO2. To study these processes, we have carried out several mutant screens and developed gas exchange technologies for their analysis.

I will cover recent advances in understanding mechanisms of ABA-dependent and ABA-independent CO2-induced stomatal movements. The role of protein kinases MPK4, MPK12, HT1, OST1, GHR1 in the regulation of guard cell anion channel SLAC1 and show how this mechanism can be used for improving plant water management.

 

Location Jozef Schell Seminar Room
Contact Prof Hannes Kollist
Plant Signal Research Group
Institute of Technology
University of Tartu
ESTONIA