Systemic signaling and acclimation in response to excess excitation energy in Arabidopsis.
Land plants are sessile and have developed sophisticated mechanisms that allow for both immediate and acclimatory responses to changing environments. Partial exposure of low light-adapted Arabidopsis plants to excess light results in a systemic acclimation to excess excitation energy and consequent photooxidative stress in unexposed leaves. Thus, plants possess a mechanism to communicate excess excitation energy systemically, allowing them to mount a defense against further episodes of such stress. Systemic redox changes in the proximity of photosystem II, hydrogen peroxide, and the induction of antioxidant defenses are key determinants of this mechanism of systemic acquired acclimation.
Karpinski
S
S
Department of Forest Genetics and Plant Physiology, Faculty of Forestry, Swedish University of Agricultural Sciences, SE-901 83 Umeâ, Sweden. stanislaw.karpinski@genfys.slu.se
Reynolds
H
H
Karpinska
B
B
Wingsle
G
G
Creissen
G
G
Mullineaux
P
P
D000222:Adaptation, Physiological; D017360:Arabidopsis / Q000235:genetics / Q000378:metabolism*; D060387:Ascorbate Peroxidases; D002374:Catalase / Q000494:pharmacology; D002736:Chloroplasts / Q000378:metabolism; D004237:Diuron / Q000494:pharmacology; D004579:Electron Transport; D018506:Gene Expression Regulation, Plant; D006861:Hydrogen Peroxide / Q000378:metabolism* / Q000494:pharmacology; D008027:Light; D010084:Oxidation-Reduction; D018384:Oxidative Stress; D010544:Peroxidases / Q000096:biosynthesis / Q000235:genetics*; D010788:Photosynthesis; D045322:Photosynthetic Reaction Center Complex Proteins / Q000378:metabolism; D045332:Photosystem II Protein Complex; D018515:Plant Leaves / Q000378:metabolism*; D030821:Plants, Genetically Modified; D011993:Recombinant Fusion Proteins / Q000096:biosynthesis; D015398:Signal Transduction
D045322:Photosynthetic Reaction Center Complex Proteins; D045332:Photosystem II Protein Complex; D011993:Recombinant Fusion Proteins; D004237:Diuron; D006861:Hydrogen Peroxide; D010544:Peroxidases; D060387:Ascorbate Peroxidases; D002374:Catalase