Rapid transmission of oxidative and nitrosative stress signals from roots to shoots in Arabidopsis.
Protein kinases play a central role in signal transduction pathways in eukaryotes. A highly conserved group of kinases, termed mitogen-activated-protein kinases (MAPKs) was shown to mediate many diverse stress responses. In plants, MAPKs were shown to function in resistance responses to many biotic and abiotic stresses. Here, we show that exposure of Arabidopsis roots to hydrogen peroxide or to nitric oxide resulted in rapid activation of protein kinases in the shoots that exhibited MAPK properties. The same pattern of kinases was induced by direct injection of these compounds into leaves, indicating accurate long-distance transmission of H2O2 and NO signals. These results are important for the understanding of redox signal transmission from the rhizosphere throughout the plant.
Capone
Ricardo
R
Department of Plant Sciences, The Hebrew University of Jerusalem, Givat-Ram, Jerusalem 91904, Israel.
Tiwari
Budhi Sagar
BS
Levine
Alex
A
D017360:Arabidopsis / Q000235:genetics*; D015153:Blotting, Western; D004591:Electrophoresis, Polyacrylamide Gel; D006861:Hydrogen Peroxide / Q000494:pharmacology; D020935:MAP Kinase Signaling System; D020928:Mitogen-Activated Protein Kinases / Q000378:metabolism; D009569:Nitric Oxide / Q000378:metabolism; D009584:Nitrogen / Q000378:metabolism*; D009599:Nitroprusside / Q000494:pharmacology; D010084:Oxidation-Reduction; D018384:Oxidative Stress; D018517:Plant Roots / Q000378:metabolism*; D018520:Plant Shoots / Q000378:metabolism*; D015398:Signal Transduction; D013997:Time Factors; D048051:p38 Mitogen-Activated Protein Kinases
D009599:Nitroprusside; D009569:Nitric Oxide; D006861:Hydrogen Peroxide; D020928:Mitogen-Activated Protein Kinases; D048051:p38 Mitogen-Activated Protein Kinases; D009584:Nitrogen