Karpinski, Stanislaw

Mühlenbock, Per

BMC Plant Biology

English

PubMed

Per Mühlenbock

Stanislaw Karpinski

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Lowered stomata conductance promotes the oxidative burst, an essential factor in the promotion of programmed cell death

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BMC Plant Biology
Open AccessMeeting abstract
Lowered stomata conductance promotes the oxidative burst, an 
essential factor in the promotion of programmed cell death
Per Mühlenbock* and Stanislaw Karpinski
Address: Department of Botany, Stockholm University, Stockholm, SE-10691, Sweden
Email: Per Mühlenbock* - Per.Muhlenbock@botan.su.se
* Corresponding author    
The role of stomata in photosynthesis and their impor-
tance in plant productivity is well established and a
number of studies have shown their importance for the
plant's interaction with the abiotic environment. How-
ever an increasing amount of evidence is pointing toward
an important role for stomata also in biotic defense
responses. Using programmed cell death mutants and
pathogen infection we set out to investigate the role of sto-
mata in biotic stress. Physiological characterization of the
lsd1 mutant of Arabidopsis thaliana revealed a correlation
between stomata conductance, H2O2 production and the
spreading of cell death. When challenging wild type
plants with the bacterial pathogen Pseudomonas syringae,
stomata closed and limiting gas exchange strongly
enhanced the spreading of cell death both in infected
plants and in the lsd1 mutant. Further studies showed that
limiting gas exchange enhances the production of reactive
oxygen species that lead to the formation of focused
hypersensitive response like lesions in ws-0. Our results
clearly indicate the importance of stomata regulation in
the spreading of cell death.
from Cell Biology of Nitric Oxide and Cell Death in Plants
Yalta, Ukraine, 8–11 September 2004
Published: 31 May 2005
BMC Plant Biology 2005, 5(Suppl 1):S24 doi:10.1186/1471-2229-5-S1-S24
<supplement> <title> <p>Cell Biology of Nitric Oxide and Cell Death in Plants</p> </title> <note>Meeting abstracts</note> </supplement>


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Lowered stomata conductance promotes the oxidative burst, an essential factor in the promotion of programmed cell death

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