TY - JOUR
T1 - Signal transduction in systemic acquired resistance
AU - Ryals, John
AU - Lawton, Kay A.
AU - Delaney, Terrence P.
AU - Friedrich, Leslie
AU - Kessmann, Helmut
AU - Neuenschwander, Urs
AU - Uknes, Scott
AU - Vernooij, Bernard
AU - Weymann, Kris
PY - 1995/5/9
Y1 - 1995/5/9
N2 - Systemic acquired resistance (SAR) is an important component of plant defense against pathogen infection. Accumulation of salicylic acid (SA) is required for the induction of SAR. However, SA is apparently not the translocated signal but is involved in transducing the signal in target tissues. Interestingly, SA accumulation is not required for production and release of the systemic signal. In addition to playing a pivotal role in SAR signal transduction, SA is important in modulating plant susceptibility to pathogen infection and genetic resistance to disease. It has been proposed that SA inhibition of catalase results in H2O2 accumulation and that therefore H2O2 serves as a second messenger in SAR signaling. We find no accumulation of H2O2 in tissues expressing SAR; thus the role of H2O2 in SAR signaling is questionable.
AB - Systemic acquired resistance (SAR) is an important component of plant defense against pathogen infection. Accumulation of salicylic acid (SA) is required for the induction of SAR. However, SA is apparently not the translocated signal but is involved in transducing the signal in target tissues. Interestingly, SA accumulation is not required for production and release of the systemic signal. In addition to playing a pivotal role in SAR signal transduction, SA is important in modulating plant susceptibility to pathogen infection and genetic resistance to disease. It has been proposed that SA inhibition of catalase results in H2O2 accumulation and that therefore H2O2 serves as a second messenger in SAR signaling. We find no accumulation of H2O2 in tissues expressing SAR; thus the role of H2O2 in SAR signaling is questionable.
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U2 - 10.1073/pnas.92.10.4202
DO - 10.1073/pnas.92.10.4202
M3 - Article
C2 - 11607545
AN - SCOPUS:0029064561
SN - 0027-8424
VL - 92
SP - 4202
EP - 4205
JO - Proceedings of the National Academy of Sciences of the United States of America
JF - Proceedings of the National Academy of Sciences of the United States of America
IS - 10
ER -