Folie 1 - PowerPoint PPT Presentation

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Folie 1

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Than the Calvin Cycle does not need anymore assimilatory power. ... Halliwell-Cycle Xanthophyll-Cycle. Protonation, Zeaxanthin Tocopherol. -Carotin. Zeaxanthin ... – PowerPoint PPT presentation

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Title: Folie 1


1
APOPTOSIS
University of Vienna Faculty of Life Science
Bolhàr-Nordenkampf Meister Society for the
Advancement of Plant sciences
Follow the clicks and gt! Fin 9.01.2008
2
Ozone injury
O3
click!
Uptake and Action of Ozone in photosynthetic
active plant cells as model for a general Stress
response.
uptake
dry deposition
click!
Apoptosis is the result of an overload
by reactive Oxygen species
Stomata pore
drought stress
Apoplast
Oxidative Burst
Intercellular spaces
click!
Cytoplasm
internal free surface area
Chloroplast
click!
Glutathione, Ascorbate Halliwell-Cyclegt
Cell wall
Xanthophyll-Cycle Protonation, Zeaxanthingt
click!
Carbonic anhydratase Tunnel proteins
click!
Assimilatory power
CO2

click!

protectiongt
overload
click!
water from xylem
Plasmalemma
Sucrose
Photosynthesis
click!
Tocopherol ß-Carotin Zeaxanthingt
Electron- and Proton transport
Phloem loading
e.g. Starch-Biosynthesis in tubers, grain filling
click!
click!
In the end all stress factors inhibit CO2 uptake.
Than the Calvin Cycle does not need anymore
assimilatory power. In the light a feed back
reaction creates reactive oxygen species (ROSINT)
at PSI and PSII. If ROSINT overload the
stress compensation capacity, the cell will get
destroyed.
H.R. Bolhàr-Nordenkampf
M.H. Meister Society for the Advancement of Plant
sciences
University of Vienna, Faculty of Life Science
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