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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
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Ozone injury
O3
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Uptake and Action of Ozone in photosynthetic
active plant cells as model for a general Stress
response.
uptake
dry deposition
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Apoptosis is the result of an overload
by reactive Oxygen species
Stomata pore
drought stress
Apoplast
Oxidative Burst
Intercellular spaces
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Cytoplasm
internal free surface area
Chloroplast
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Glutathione, Ascorbate Halliwell-Cyclegt
Cell wall
Xanthophyll-Cycle Protonation, Zeaxanthingt
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Carbonic anhydratase Tunnel proteins
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Assimilatory power
CO2

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protectiongt
overload
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water from xylem
Plasmalemma
Sucrose
Photosynthesis
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Tocopherol ß-Carotin Zeaxanthingt
Electron- and Proton transport
Phloem loading
e.g. Starch-Biosynthesis in tubers, grain filling
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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