Signaling Role of Salicylic Acid in Abiotic Stress Responses in Plants
It is well known that salicylic acid (SA) is a natural signaling molecule involved in plant defense response against pathogen infection. In addition to plant responses to biological enermies, evidence on the involvement of SA in the plant abiotic response
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Signaling Role of Salicylic Acid in Abiotic Stress Responses in Plants Tomonori Kawano, Takuya Hiramatsu and François Bouteau
Abstract It is well known that salicylic acid (SA) is a natural signaling molecule involved in plant defense response against pathogen infection. In addition to plant responses to biological enermies, evidence on the involvement of SA in the plant abiotic responses has been recently provided. This chapter covers the recent progress in our understanding of the SA signaling pathways and mechanisms by which SA performs its role as the mediator of stress responses. In the upper half, history and progress in reactive oxygen species (ROS) and calcium signalingrelated researches are covered, as both ROS and calcium are now considered to act downstream of SA action during both the plant defense against pathogenic microbes and cellular response to various abiotic stimuli. In the lower half of the chapter, plant cell responses to abiotic stresses in the surrounding environment including exposures of plant cells to photochemical oxidants chiefly ozone, radiation by ultraviolet light, and toxic metal ions such as ions of copper and aluminum are discussed.
Keywords Abiotic stress Aluminum toxicity Calcium species Ozone Salicylic acid Signal transduction
Reactive oxygen
T. Kawano (&) T. Hiramatsu Faculty and Graduate School of Environmental Engineering, The University of Kitakyushu, Kitakyushu, Japan e-mail: [email protected]@kitakyu-u.ac.jp T. Kawano F. Bouteau IED, Université Paris Diderot-Paris 7, Institut de Biologie des Plantes, Bât 630 91405 Orsay cedex, France T. Kawano F. Bouteau University of Florence LINV Kitakyushu Research Center, Kitakyushu, Japan T. Kawano F. Bouteau International Plant Neurobiology Laboratory, University of Florence, Florence, Sesto Fiorentino, Italy
S. Hayat et al. (eds.), Salicylic Acid, DOI: 10.1007/978-94-007-6428-6_11, Springer Science+Business Media Dordrecht 2013
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1 Introduction Living plants must respond to and combat a variety of stressful stimuli in the surrounding environments, which are often threatening the life of plants. Therefore, plants are naturally equipped with the systems for sensing of, adaptation to, and tolerance against both the biotic and abiotic stresses. Recent studies have elucidated that plant responses to different stresses are highly complex and involve the changes at transcriptome, cellular, and physiological levels (Atkinson and Urwin 2012). As biotic factors threatening the plants include animal and insect herbivores and a wide range of pathogenic microbes such as viruses, bacteria, and fungi (Kerchev et al. 2012; Kangasjärvi et al. 2012). On the other hand, abiotic stimuli threatening the plants include physical stimuli such as transient and/or chronic exposures to lights (Yokawa et al. 2011a, b), water stresses (Jiang and Zhang 2002), mechanical challenges (Mori et al. 2004; Sukharev et al. 1993), high (Lin et al. 2006) and low (Lin et al. 2005, 2007) temperatures;
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