Abstract
Phospholipase D (PLD) hydrolyzes structural phospholipids like phosphatidylcholine (PC) and phosphatidylethanolamine (PE) into phosphatidic acid (PA) and free choline/ethanolamine. In plants, this activity can be stimulated by a wide variety of biotic and abiotic stresses (Li et al., Biochim Biophys Acta 1791:927–935, 2009; Testerink and Munnik, J Exp Bot 62(7):2349–2361, 2011). This chapter describes a protocol for the measurement of PLD activity in vivo. The protocol takes advantage of a unique property of PLD, i.e., its ability to substitute a primary alcohol, such as 1-butanol, for water in the hydrolytic reaction. This transphosphatidylation reaction results in the formation of phosphatidylbutanol (PBut), which is a specific and unique reporter for PLD activity. The assay is highly sensitive for detecting PLD activity in vivo, following stimulation of intact plant cells, seedlings, and tissues, being a valuable method for studying the regulation of plant PLD activity in vivo.
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Acknowledgments
This work was supported by grants from the Netherlands Organization for Scientific Research (NWO; VIDI 864.05.001), the EU (COST FA0605), the Universidad Nacional de Mar del Plata (UNMdP), Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), and Agencia Nacional de Promoción Científica y Tecnológica (ANPCyT). We thank Jiorgos Kourelis for performing the experiment described in Fig. 1.
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Munnik, T., Laxalt, A.M. (2013). Measuring PLD Activity In Vivo. In: Munnik, T., Heilmann, I. (eds) Plant Lipid Signaling Protocols. Methods in Molecular Biology, vol 1009. Humana, Totowa, NJ. https://doi.org/10.1007/978-1-62703-401-2_20
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DOI: https://doi.org/10.1007/978-1-62703-401-2_20
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