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Floková, K.; Tarkowská, D.; Miersch, O.; Strnad, M.; Wasternack, C.; Novak, O. UHPLC-MS/MS based target profiling of stress-induced phytohormones Phytochemistry 105, 147-157, (2014) DOI: 10.1016/j.phytochem.2014.05.015
Stress-induced changes in phytohormone metabolite profiles have rapid effects on plant metabolic activity and growth. The jasmonates (JAs) are a group of fatty acid-derived stress response regulators with roles in numerous developmental processes. To elucidate their dual regulatory effects, which overlap with those of other important defence-signalling plant hormones such as salicylic acid (SA), abscisic acid (ABA) and indole-3-acetic acid (IAA), we have developed a highly efficient single-step clean-up procedure for their enrichment from complex plant matrices that enables their sensitive quantitative analysis using hyphenated mass spectrometry technique. The rapid extraction of minute quantities of plant material (less than 20 mg fresh weight, FW) into cold 10% methanol followed by one-step reversed-phase polymer-based solid phase extraction significantly reduced matrix effects and increased the recovery of labile JA analytes. This extraction and purification protocol was paired with a highly sensitive and validated ultra-high performance liquid chromatography–tandem mass spectrometry (UHPLC–MS/MS) method and used to simultaneously profile sixteen stress-induced phytohormones in minute plant material samples, including endogenous JA, several of its biosynthetic precursors and derivatives, as well as SA, ABA and IAA.
Yamaguchi, I.; Cohen, J. D.; Culler, A. H.; Quint, M.; Slovin, J. P.; Nakajima, M.; Yamaguchi, S.; Sakakibara, H.; Kuroha, T.; Hirai, N.; Yokota, T.; Ohta, H.; Kobayashi, Y.; Mori, H.; Sakagami, Y. Plant Hormones (Liu, H.-W. & Mander, L., eds.). Comprehensive Natural Products II 4, 9-125, (2010) ISBN: 978-0-08-045382-8 DOI: 10.1016/B978-008045382-8.00092-7
The definition of a plant hormone has not been clearly established, so
the compounds classified as plant hormones often vary depending on which
definition is considered. In this chapter, auxins, gibberellins (GAs),
cytokinins, abscisic acid, brassinosteroids, jasmonic acid-related
compounds, and ethylene are described as established plant hormones,
while polyamines and phenolic compounds are not included. On the other
hand, several peptides that have been proven to play a clear
physiological role(s) in plant growth and development, similar to the
established plant hormones, are referred. This chapter will focus
primarily on the more recent discoveries of plant hormones and their
impact on our current understanding of their biological role. In some
cases, however, it is critical to place recent work in a proper
historical context.