Profiles of endogenous phytohormones and expression of some hormone-related genes in Scots pine and Norway spruce seedlings under water deficit

0531195 - ÚEB 2021 RIV FR eng J - Journal Article
Zlobin, I. E. - Vaňková, Radomíra - Pashkovskiy, P. P. - Dobrev, Petre - Kartashov, A. V. - Ivanov, Y. V. - Kuznetsov, V. D.
Profiles of endogenous phytohormones and expression of some hormone-related genes in Scots pine and Norway spruce seedlings under water deficit.
Plant Physiology and Biochemistry. Roč. 151, JUN (2020), s. 457-468. ISSN 0981-9428
R&D Projects: GA ČR GA17-04607S
Institutional support: RVO:61389030
Keywords : Gene expression * Induced water stress * Phytohormones * Picea abies * Pinus sylvestris * Polyethylene glycol 6000
OECD category: Biochemistry and molecular biology
Impact factor: 4.270, year: 2020
Method of publishing: Open access
http://doi.org/10.1016/j.plaphy.2020.03.056

Different plant hormones are involved in plant adaptation to water deficit. In comparison to angiosperms, little is known about the impact of drought on the pool of phytohormones in gymnosperms. Therefore, we studied the effect of polyethylene glycol-induced water deficit on the changes in content of different phytohormones in Scots pine and Norway spruce seedlings, which are known for their different strategies of adaptation to water deficit. The following hormone classes were analysed: cytokinins, auxins, jasmonates, salicylic and benzoic acids, and 1-aminocyclopropane-1-carboxylic acid (an ethylene precursor). No consistent reaction to water stress was observed for the content of well-known stress-related hormones – salicylic acid and jasmonates. In contrast, drought induced a dose-dependent accumulation of cytokinins in pine needles, with less profound changes in spruce needles. The most prominent changes were observed for 1-aminocyclopropane-1-carboxylic acid content, which increased several-fold in spruce roots and pine needles under water deficit. Water-deficit-induced changes in the contents of cytokinins and 1-aminocyclopropane-1-carboxylic acid were accompanied by the differential regulation of genes involved in the metabolism of these hormones. Possible links between changes in hormone pools and the adaptation of seedlings to water deficit are discussed.
Permanent Link: http://hdl.handle.net/11104/0309915