Preprint Article Version 1 Preserved in Portico This version is not peer-reviewed

Influence of Exogenous 24-Epicasterone on the Hormonal Status of Soybean Plants

Michael Derevyanchuk
* ORCID logo ,
Serhii Kretynin
,
Yaroslava Bukhonska
,
Igor Pokotylo
,
Vladimir Khripach
,
Eric Ruelland
ORCID logo ,
Roberta Filepova
,
Petre I. Dobrev
ORCID logo ,
Jan Martinec
,
Volodymyr Kravets
*
Version 1 : Received: 16 August 2023 / Approved: 17 August 2023 / Online: 17 August 2023 (10:18:25 CEST)

A peer-reviewed article of this Preprint also exists.

Derevyanchuk, M.; Kretynin, S.; Bukhonska, Y.; Pokotylo, I.; Khripach, V.; Ruelland, E.; Filepova, R.; Dobrev, P.I.; Martinec, J.; Kravets, V. Influence of Exogenous 24-Epicasterone on the Hormonal Status of Soybean Plants. Plants 2023, 12, 3586. Derevyanchuk, M.; Kretynin, S.; Bukhonska, Y.; Pokotylo, I.; Khripach, V.; Ruelland, E.; Filepova, R.; Dobrev, P.I.; Martinec, J.; Kravets, V. Influence of Exogenous 24-Epicasterone on the Hormonal Status of Soybean Plants. Plants 2023, 12, 3586.

Abstract

Brassinosteroids (BR) are key phytohormones involved in the regulation of major processes of cell metabolism guiding plant growth. In the past decades, new evidence made it clear that BRs also play a key role in the orchestration of plant responses to many abiotic and biotic stresses. In the present work we analyzed the impact of foliar treatment with 24-epicastasterone (ECS) on the endogenous content of major phytohormones (auxins, salicylic acid, jasmonic acid, abscisic acid) and their intermediates in soybean leaves 7 days following the treatment. Changes in the endogenous content of phytohormones have been identified and quantified by LC/MS. Obtained results point to a clear role of ECS in the upregulation of auxin content (indole-3-acetic acid, IAA) and downregulation of salicylic, jasmonic, and abscisic acid levels. These data confirm that under optimal conditions ECS in tested concentrations of 0,25 µM and 1 µM might promote growth in soybean by inducing auxin contents. Benzoic acid (a precursor of salicylic acid (SA)), but not SA itself, has also been highly accumulated under ECS treatment which indicates an activation of the adaption strategies of cell metabolism to possible environmental challenges.

Keywords

24-epicastasterone; salicylic acid; auxin; hormones; soybean

Subject

Biology and Life Sciences, Plant Sciences

Copyright: This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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