Diurnal rhythmicity of endogenous phytohormones and phototropic bending capacity in potato (Solanum tuberosum L.) shoot cultures

  • D. VinterhalterEmail author
  • J. Savić
  • M. Stanišić
  • B. Vinterhalter
  • P. I. Dobrev
  • V. Motyka
Original paper


Taking advantage of advanced high performance liquid chromatography–electrospray tandem–mass spectrometry (HPLC–ESI–MS/MS), we screened daily changes in concentrations of endogenous phytohormones of in vitro grown potato (Solanum tuberosum L. cv. Désirée) shoot cultures and checked for possible connections between the rhythmicity of endogenous phytohormones and phototropic bending capacity of the same cultures. Studies done under diurnal 16 h light and 8 h darkness (diurnal) and continuous light (CL) conditions showed prominent daily rhythmicity of endogenous phytohormone levels in both light regimes. Phototropic bending in potato is known to be rhythmic only in the diurnal, whereas in CL conditions the bending response is present but without any daily rhythmicity. For all of the studied phytohormone groups significant differences between the diurnal and CL conditions were found. Changes in the concentration of indole auxins, indole-3-acetic acid (IAA) and its catabolite 2-oxindole-3-acetic acid (OxIAA), were the most prominent. Their levels clearly alternated with level of IAA being high in diurnal and OxIAA in CL conditions. Significant concentration changes were also observed for other phytohormones such as cytokinin ribosides, salicylic acid, abscisic acid and phaseic acid. Observed changes in daily phytohormone levels indicate strong and complex involvement of diverse phytohormone groups in realization of the phototropic bending response of potato shoots.


Potato In vitro Phototropism Endogenous phytohormones Diurnal rhythmicity Circadian regulation 



Work was supported by the Czech Science Foundation (Grant No. 19-12262S) and the Ministry of Education, Youth and Sports of Czech Republic from European Regional Development Fund-Project “Centre for Experimental Plant Biology” (No. CZ.02.1.01/0.0/0.0/16_019/0000738), Swiss National Science Fondation SCOPES project 152221 headed by Christian Fankhauser and by Serbian Ministry of Education, Science and Technological Development (Project ON 173015). The authors are grateful to Marie Korecka for invaluable technical support.


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Copyright information

© Springer Nature B.V. 2019

Authors and Affiliations

  1. 1.Institute for Biological Research “Siniša Stanković”, National Institute of Republic of SerbiaUniversity of BelgradeBelgradeSerbia
  2. 2.Institute of Experimental Botany of the Czech Academy of SciencesPrague 6Czech Republic

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