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Red Light Controls Adventitious Root Regeneration by Modulating Hormone Homeostasis in Picea abies Seedlings

Alallaq, Sanaria and Ranjan, Alok and Brunoni, Federica and Novak, Ondrej and Lakehal, Abdellah and Bellini, Catherine (2020). Red Light Controls Adventitious Root Regeneration by Modulating Hormone Homeostasis in Picea abies Seedlings. Frontiers in Plant Science. 11 , 586140
[Journal article]

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Abstract

Vegetative propagation relies on the capacity of plants to regeneratede novoadventitious roots (ARs), a quantitative trait controlled by the interaction of endogenous factors, such as hormones and environmental cues among which light plays a central role. However, the physiological and molecular components mediating light cues during AR initiation (ARI) remain largely elusive. Here, we explored the role of red light (RL) on ARI in de-rooted Norway spruce seedlings. We combined investigation of hormone metabolism and gene expression analysis to identify potential signaling pathways. We also performed extensive anatomical characterization to investigate ARI at the cellular level. We showed that in contrast to white light, red light promoted ARI likely by reducing jasmonate (JA) and JA-isoleucine biosynthesis and repressing the accumulation of isopentyl-adenine-type cytokinins. We demonstrated that exogenously applied JA and/or CK inhibit ARI in a dose-dependent manner and found that they possibly act in the same pathway. The negative effect of JA on ARI was confirmed at the histological level. We showed that JA represses the early events of ARI. In conclusion, RL promotes ARI by repressing the accumulation of the wound-induced phytohormones JA and CK.

Authors/Creators:Alallaq, Sanaria and Ranjan, Alok and Brunoni, Federica and Novak, Ondrej and Lakehal, Abdellah and Bellini, Catherine
Title:Red Light Controls Adventitious Root Regeneration by Modulating Hormone Homeostasis in Picea abies Seedlings
Year of publishing :2020
Volume:11
Article number:586140
Number of Pages:14
ISSN:1664-462X
Language:English
Publication Type:Journal article
Article category:Scientific peer reviewed
Version:Published version
Copyright:Creative Commons: Attribution 4.0
Full Text Status:Public
Subjects:(A) Swedish standard research categories 2011 > 1 Natural sciences > 106 Biological Sciences (Medical to be 3 and Agricultural to be 4) > Botany
Keywords:adventitious roots, conifers, Picea abies, auxin, cytokinins, jasmonate, red light, root development
URN:NBN:urn:nbn:se:slu:epsilon-p-108219
Permanent URL:
http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-p-108219
Additional ID:
Type of IDID
DOI10.3389/fpls.2020.586140
Web of Science (WoS)000574406000001
ID Code:17959
Faculty:S - Faculty of Forest Sciences
Department:(S) > Dept. of Forest Genetics and Plant Physiology
Deposited By: SLUpub Connector
Deposited On:27 Oct 2020 14:24
Metadata Last Modified:27 Oct 2020 14:31

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