Profiles of Endogenous Phytohormones Over the Course of Norway Spruce Somatic Embryogenesis

Frontiers in Plant Science
Zuzana VondrakovaVaclav Motyka

Abstract

Conifer somatic embryogenesis (SE) is a process driven by exogenously supplied plant growth regulators (PGRs). Exogenous PGRs and endogenous phytohormones trigger particular ontogenetic events. Complex mechanisms involving a number of endogenous phytohormones control the differentiation of cells and tissues, as well as the establishment of structures and organs. Most of the mechanisms and hormonal functions in the SE of conifers have not yet been described. With the aim to better understand these mechanisms, we provided detailed analysis of the spectrum of endogenous phytohormones over the course of SE in Norway spruce (Picea abies). Concentrations of endogenous phytohormones including auxins, cytokinins (CKs), abscisic acid (ABA), jasmonates, and salicylic acid (SA) in somatic P. abies embryos were analyzed by HPLC-ESI-MS/MS. The results revealed that the concentrations of particular phytohormone classes varied substantially between proliferation, maturation, desiccation, and germination. Endogenous ABA showed a maximum concentration at the maturation stage, which reflected the presence of exogenous ABA in the medium and demonstrated its efficient perception by the embryos as a prerequisite for their further development. Auxin...Continue Reading

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Citations

Sep 25, 2019·International Journal of Molecular Sciences·Rayan AwadaHervé Etienne
Feb 23, 2020·International Journal of Molecular Sciences·Anna M WójcikMałgorzata D Gaj
Mar 7, 2019·Frontiers in Plant Science·Isabel ArrillagaEster Sales
Oct 16, 2019·Frontiers in Plant Science·Yolanda Pérez-PérezPilar S Testillano
Apr 16, 2019·Frontiers in Plant Science·Maria Salomé Pais
May 15, 2020·International Journal of Molecular Sciences·Teresa Hazubska-PrzybyłEmilia Pers-Kamczyc
Feb 14, 2021·Journal of Plant Physiology·Jacobo Pérez-PastranaNancy Santana-Buzzy
Nov 21, 2020·Tree Physiology·Jean-François TrontinAndrea Rupps
Nov 2, 2021·Frontiers in Plant Science·Lenka Záveská DrábkováVáclav Motyka

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Methods Mentioned

BETA
ion-exchange chromatography
PCA

Software Mentioned

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