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Open AccessArticle

“Salicylic Acid Mutant Collection” as a Tool to Explore the Role of Salicylic Acid in Regulation of Plant Growth under a Changing Environment

1
Institute of Experimental Botany of the Czech Academy of Sciences, 16502 Prague, Czech Republic
2
Department of Biochemistry and Microbiology, University of Chemistry and Technology, 16628 Prague, Czech Republic
3
Department of Biochemistry, Faculty of Science, Charles University in Prague, 11000 Prague, Czech Republic
4
Department of Food Science, The Faculty of Agrobiology, Food and Natural Resources, The Czech University of Life Sciences Prague, 16500 Prague, Czech Republic
5
V.P. Kukhar Institute of Bioorganic Chemistry and Petrochemistry, National Academy of Sciences of Ukraine, 02094 Kyiv, Ukraine
6
Genetics, Faculty of Biology, Ludwig-Maximilians-University of Munich (LMU), D-82152 Martinsried, Germany
*
Authors to whom correspondence should be addressed.
These authors contributed equally to this work.
Int. J. Mol. Sci. 2019, 20(24), 6365; https://doi.org/10.3390/ijms20246365
Received: 31 October 2019 / Revised: 12 December 2019 / Accepted: 13 December 2019 / Published: 17 December 2019
(This article belongs to the Special Issue Salicylic Acid Signalling in Plants)
The phytohormone salicylic acid (SA) has a crucial role in plant physiology. Its role is best described in the context of plant response to pathogen attack. During infection, SA is rapidly accumulated throughout the green tissues and is important for both local and systemic defences. However, some genetic/metabolic variations can also result in SA overaccumulation in plants, even in basal conditions. To date, more than forty Arabidopsis thaliana mutants have been described as having enhanced endogenous SA levels or constitutively activated SA signalling pathways. In this study, we established a collection of mutants containing different SA levels due to diverse genetic modifications and distinct gene functions. We chose prototypic SA-overaccumulators (SA-OAs), such as bon1-1, but also “non-typical” ones such as exo70b1-1; the selection of OA is accompanied by their crosses with SA-deficient lines. Here, we extensively studied the plant development and SA level/signalling under various growth conditions in soil and in vitro, and showed a strong negative correlation between rosette size, SA content and PR1/ICS1 transcript signature. SA-OAs (namely cpr5, acd6, bon1-1, fah1/fah2 and pi4kβ1β2) had bigger rosettes under high light conditions, whereas WT plants did not. Our data provide new insights clarifying a link between SA and plant behaviour under environmental stresses. The presented SA mutant collection is thus a suitable tool to shed light on the mechanisms underlying trade-offs between growth and defence in plants. View Full-Text
Keywords: Salicylic acid; Arabidopsis mutants; light; growth; gene transcription Salicylic acid; Arabidopsis mutants; light; growth; gene transcription
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Pluhařová, K.; Leontovyčová, H.; Stoudková, V.; Pospíchalová, R.; Maršík, P.; Klouček, P.; Starodubtseva, A.; Iakovenko, O.; Krčková, Z.; Valentová, O.; Burketová, L.; Janda, M.; Kalachova, T. “Salicylic Acid Mutant Collection” as a Tool to Explore the Role of Salicylic Acid in Regulation of Plant Growth under a Changing Environment. Int. J. Mol. Sci. 2019, 20, 6365.

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