title: Temporal-spatial interaction between reactive oxygen species and abscisic acid regulates rapid systemic acclimation in plants.
abstract: Being sessile organisms, plants evolved sophisticated acclimation mechanisms to cope with abiotic challenges in their environment. These are activated at the initial site of exposure to stress, as well as in systemic tissues that have not been subjected to stress (termed systemic acquired acclimation [SAA]). Although SAA is thought to play a key role in plant survival during stress, little is known about the signaling mechanisms underlying it. Here, we report that SAA in plants requires at least two different signals: an autopropagating wave of reactive oxygen species (ROS) that rapidly spreads from the initial site of exposure to the entire plant and a stress-specific signal that conveys abiotic stress specificity. We further demonstrate that SAA is stress specific and that a temporal-spatial interaction between ROS and abscisic acid regulates rapid SAA to heat stress in plants. In addition, we demonstrate that the rapid ROS signal is associated with the propagation of electric signals in Arabidopsis thaliana. Our findings unravel some of the basic signaling mechanisms underlying SAA in plants and reveal that signaling events and transcriptome and metabolome reprogramming of systemic tissues in response to abiotic stress occur at a much faster rate than previously envisioned.
authors.affiliation: Department of Biological Sciences, College of Arts and Sciences, University of North Texas, Denton, Texas 76203-5017.
authors.forename: Nobuhiro
authors.initials: N
authors.lastname: Suzuki
authors.forename: Gad
authors.initials: G
authors.lastname: Miller
authors.forename: Carolina
authors.initials: C
authors.lastname: Salazar
authors.forename: Hossain A
authors.initials: HA
authors.lastname: Mondal
authors.forename: Elena
authors.initials: E
authors.lastname: Shulaev
authors.forename: Diego F
authors.initials: DF
authors.lastname: Cortes
authors.forename: Joel L
authors.initials: JL
authors.lastname: Shuman
authors.forename: Xiaozhong
authors.initials: X
authors.lastname: Luo
authors.forename: Jyoti
authors.initials: J
authors.lastname: Shah
authors.forename: Karen
authors.initials: K
authors.lastname: Schlauch
authors.forename: Vladimir
authors.initials: V
authors.lastname: Shulaev
authors.forename: Ron
authors.initials: R
authors.lastname: Mittler
mesh_terms: D000040:Abscisic Acid / Q000378:metabolism*; D000064:Acclimatization; D017360:Arabidopsis / Q000235:genetics / Q000502:physiology* / Q000528:radiation effects; D029681:Arabidopsis Proteins / Q000235:genetics / Q000378:metabolism*; D020869:Gene Expression Profiling; D018506:Gene Expression Regulation, Plant; D008027:Light; D055442:Metabolome; D008954:Models, Biological; D019255:NADPH Oxidases / Q000235:genetics / Q000378:metabolism*; D020411:Oligonucleotide Array Sequence Analysis; D018517:Plant Roots; D017382:Reactive Oxygen Species / Q000378:metabolism*; D036226:Seedlings; D015398:Signal Transduction; D013312:Stress, Physiological
chemical_list: D029681:Arabidopsis Proteins; D017382:Reactive Oxygen Species; D000040:Abscisic Acid; C568857:AT5G47910 protein, Arabidopsis; D019255:NADPH Oxidases
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