Signalling and cell death in ozone‐exposed plants

Kangasjärvi, Jaakko; Jaspers, Pinja; Kollist, Hannes

doi:10.1111/j.1365-3040.2005.01325.x

Cited by 433 publications

(466 citation statements)

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“…In a mutant screen for O 3 sensitivity, a series of Arabidopsis ethyl methanesulphonate (EMS) mutants called radical-induced cell death (rcd) was identified 13,14 . One of them, a recessive mutant originally referred to as rcd3 (ref.…”

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SLAC1 is required for plant guard cell S-type anion channel function in stomatal signalling

Vahisalu

Kollist

Wang

et al. 2008

Nature

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Stomatal pores, formed by two surrounding guard cells in the epidermis of plant leaves, allow influx of atmospheric carbon dioxide in exchange for transpirational water loss. Stomata also restrict the entry of ozone-an important air pollutant that has an increasingly negative impact on crop yields, and thus global carbon fixation 1 and climate change 2 . The aperture of stomatal pores is regulated by the transport of osmotically active ions and metabolites across guard cell membranes 3,4 . Despite the vital role of guard cells in controlling plant water loss 3,4 , ozone sensitivity 1,2 and CO 2 supply 2,5-7 , the genes encoding some of the main regulators of stomatal movements remain unknown. It has been proposed that guard cell anion channels function as important regulators of stomatal closure and are essential in mediating stomatal responses to physiological and stress stimuli 3,4,8 . However, the genes encoding membrane proteins that mediate guard cell anion efflux have not yet been identified. Here we report the mapping and characterization of an ozone-sensitive Arabidopsis thaliana mutant, slac1. We show that SLAC1 (SLOW ANION CHANNEL-ASSOCIATED 1) is preferentially expressed in guard cells and encodes a distant homologue of fungal and bacterial dicarboxylate/malic acid transport proteins. The plasma membrane protein SLAC1 is essential for stomatal closure in response to CO 2 , ©2008 Nature Publishing GroupCorrespondence and requests for materials should be addressed to J.K. (jaakko.kangasjarvi@helsinki.fi). † Present address: Division of Biology, Imperial College London, London SW7 2AZ, UK. * These authors contributed equally to this work Fig. 3d and Supplementary Fig. 6a. N.N. performed experiments in Fig. 3a and Supplementary Fig. 7. Y.-F.W. performed experiments in Fig. 4 and Supplementary Figs 8 and 9. J.K. and J.I.S. wrote the paper. All the authors discussed the results, and commented on and edited the manuscript.The primary microarray data reported has been deposited with the ArrayExpress database under accession number E-MEXP-1388.Reprints and permissions information is available at www.nature.com/reprints. 8,11 by mediating anion efflux and causing membrane depolarization, which controls K + efflux through K + channels. So far, none of the candidates for plant anion channels -the plant homologues to the animal CLC chloride channels -has been localized to the plasma membrane 10 , and the first plant CLC channel that was functionally characterized encodes a central vacuolar proton/nitrate exchanger 12 , rather than an anion channel. Thus, despite their proposed importance in several physiological and stress responses in plants 8,10,11 , the molecular identity of the guard cell plasma membrane proteins that mediate anion channel activity has remained unknown. NIH Public AccessIn a mutant screen for O 3 sensitivity, a series of Arabidopsis ethyl methanesulphonate (EMS) mutants called radical-induced cell death (rcd) was identified 13,14 . One of them, a recessive mutant originally referred ...

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SLAC1 is required for plant guard cell S-type anion channel function in stomatal signalling

Vahisalu

Kollist

Wang

et al. 2008

Nature

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“…They have important and tightly regulated roles as signaling molecules in disease resistance, stress adaptation, and development in many organisms (1,2). In plants, ROS are produced in response to many stresses, including pathogen attack, osmotic stress, excess light, wounding, and ozone (O 3 ), in different subcellular compartments (1). For example, pathogen attack and O 3 induce an oxidative burst in the extracellular space, whereas high light or the herbicide methyl viologen lead to the production of ROS in the chloroplast (1).…”

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“…In plants, ROS are produced in response to many stresses, including pathogen attack, osmotic stress, excess light, wounding, and ozone (O 3 ), in different subcellular compartments (1). For example, pathogen attack and O 3 induce an oxidative burst in the extracellular space, whereas high light or the herbicide methyl viologen lead to the production of ROS in the chloroplast (1). ROS also serve as second messengers in abscisic acid (ABA) signaling in the regulation of the stomatal aperture (3) and are involved in root hair growth (4).…”

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Arabidopsis GRI is involved in the regulation of cell death induced by extracellular ROS

Wrzaczek

Brosché

Kollist

et al. 2009

Proc. Natl. Acad. Sci. U.S.A.

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“…acute vs. chronic ozone exposure (Baier et al, 2005;Betzelberger et al, 2010;Burkey et al, 2003;Feng et al, 2011;Kollist et al, 2000;Wang et al, 2014aWang et al, , 2014b. In general, acute exposure to relatively high O 3 concentrations often caused leaf lesions resulting from programmed cell death associated with plant-pathogen interaction (Kangasjarvi et al, 2005;Overmyer et al, 2003;Rao et al, 2000) and induces an increase in antioxidant metabolism (Conklin and Barth, 2004;Kangasjarvi et al, 1994). The chronic exposure to relatively low O 3 concentrations always induces declined photosynthesis along with accelerated leaf senescence and consequently reductions in productivity and yield (Ashmore, 2005;Burkart et al, 2013;Feng and Kobayashi, 2009;Feng et al, 2008;Feng et al, 2011;Zhu et al, 2011).…”

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Differential effects of ozone on photosynthesis of winter wheat among cultivars depend on antioxidative enzymes rather than stomatal conductance

Feng

Wang

Pleijel

et al. 2016

Science of The Total Environment

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• 5 modern cultivars of wheat were investigated under fully open-air field conditions. • Significant O 3 effects were only found during the mid-grain filling stage.• The lower photosynthetic rates were mainly due to nonstomatal factors.• Antioxidative enzymes contributed to the differential response to E-O 3 among cultivars. from the initiation of tillering to final harvest. Pigments, gas exchange rates, chlorophyll a fluorescence, antioxidants contents, antioxidative enzyme activity and lipid oxidation were measured in three replicated plots throughout flag leaf development. Results showed that significant O 3 effects on most variables were only found during the mid-grain filling stage. Across five cultivars, E-O 3 significantly accelerated leaf senescence, as indicated by increased lipid oxidation as well as faster declines in pigment amounts and photosynthetic rates. The lower photosynthetic rates were mainly due to non-stomatal factors, e.g. lower maximum carboxylation capacity and electron transport rates. There were strong interactions between O 3 and cultivar in photosynthetic pigments, light-saturated photosynthesis rate and chlorophyll a fluorescence with O 3 -sensitive (Y19, Y2 and Y15) and O 3 -tolerant (J2, Y16) cultivars being clearly differentiated in their responses to E-O 3 . E-O 3 significantly influenced the antioxidative enzymes but not antioxidant contents. G R A P H I C A L A B S T R A C T a b s t r a c t a r t i c l e i n f o Contents lists available at ScienceDirectScience of the Total Environment j o u r n a l h o m e p a g e : w w w . e l s e v i e r . c o m / l o c a t e / s c i t o t e n v cultivar were found in antioxidative enzymes, such as SOD and CAT, but not in stomatal conductance (g s ). Therefore, it can be concluded that antioxidative enzymes rather than g s or antioxidants are responsible for the differential responses to E-O 3 among cultivars. These findings provide important information for the development of accurate modeling O 3 effects on crops, especially with respect to the developmental stage when O 3 damage to photosynthesis becomes manifest.

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Signalling and cell death in ozone‐exposed plants

Abstract: Experiments with

Cited by 433 publications

References 134 publications

SLAC1 is required for plant guard cell S-type anion channel function in stomatal signalling

SLAC1 is required for plant guard cell S-type anion channel function in stomatal signalling

Arabidopsis GRI is involved in the regulation of cell death induced by extracellular ROS

Differential effects of ozone on photosynthesis of winter wheat among cultivars depend on antioxidative enzymes rather than stomatal conductance

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