BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//Talks.cam//talks.cam.ac.uk//
X-WR-CALNAME:Talks.cam
BEGIN:VEVENT
SUMMARY:Maize acclimation to changing light quality - Chandra Bellasio
DTSTART:20130613T153000Z
DTEND:20130613T160000Z
UID:TALK44303@talks.cam.ac.uk
CONTACT:Megan Cooper
DESCRIPTION:Leaves are naturally exposed to variable light conditions\; ch
 anges in intensity are often accompanied by changes in quality. In C4 plan
 ts\, where bundle sheath (BS) cells are surrounded by more superficial mes
 ophyll (M)\, changes in light quality affect ATP partitioning between BS a
 nd M. Low light intensity is known to affect leakiness (Φ)\, the relative
  amount of CO2 retrodiffusing from the BS\, thus the coordination between 
 the C4 and the C3 activity.\n\nTo investigate the effect of changing ATP p
 artitioning on C4 / C3 coordination we estimated Φ under different light 
 quality at low irradiance. Φ was not influenced by light quality\, sugges
 ting that efficient biochemical mechanisms were coping with the changing A
 TP partitioning. These mechanisms were modelled to take into account the f
 unctional and spatial differentiation between BS and M. ATP demand was stu
 died by incrementally allocating ATP sinks (starch synthesis\, PEPCK\, and
  PGA reduction) to BS. The ‘window’ of ATP demand in BS relative to M 
 ranged between 0.27 and 0.8. ATP production in BS was estimated by modelli
 ng light penetration in a maize leaf and resulted in a wider range (min 0.
 29\; max 0.96). Variable transamination rates were functional to allowing 
 the uncoupled delivery of NADPH and CO2 to BS.
LOCATION:Biffen Lecture Theater\, Department of Genetics
END:VEVENT
END:VCALENDAR