Integrated physiological and hormonal profile of heat-induced thermotolerance in Pinus radiata

Tree Physiology
Mónica EscandónMónica Meijón

Abstract

Despite great interest, not only from the economic point of view but also in terms of basic science, research on heat stress tolerance in conifers remains scarce. To fill this gap, a time-course experiment using expected temperature increase was performed aiming to identify physiological and biochemical traits that allow the characterization of heat-induced thermotolerance and recovery in Pinus radiata D. Don plants. Several physiological parameters were assessed during heat exposure and after recovery, and multiple phytohormones-abscisic acid (ABA), indole-3-acetic acid (IAA), cytokinins (CKs), gibberellins, jasmonic acid, salicylic acid (SA) and brassinosteroids-were quantified by ultra-performance liquid chromatography-mass spectrometry from unique sample. Furthermore, tissue specific stress-signaling was monitored by IAA and ABA immunolocalization. Multivariate statistical analysis of the data enabled clustering of the shorter- and longer-term effects of heat stress exposure. Two sequential physiological responses were identified: an immediate and a delayed response, essentially determined by specific phytohormones, proline, malondialdehyde and total soluble sugar patterns. Results showed that ABA and SA play a crucial role...Continue Reading

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Citations

Aug 6, 2016·Molecular Plant Pathology·Silvia Palma Ferreira
Nov 27, 2019·Journal of Experimental Botany·Maximiliano Estravis-BarcalaMaría Verónica Arana
Jun 25, 2017·Journal of Experimental Botany·Mónica EscandónMónica Meijón
May 3, 2018·Frontiers in Plant Science·Mónica EscandónMaría Jesús Cañal
Aug 22, 2018·International Journal of Molecular Sciences·Jaroslav PavlůMartin Černý
Nov 17, 2020·Frontiers in Plant Science·Hui-Qin WangBai-Zhao Ren
Mar 2, 2021·Frontiers in Plant Science·Ning LiWoe Yeon Kim
Nov 30, 2021·Biologia Futura·Maheswari PatturajYasodha Ramasamy

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