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Red Light Controls Adventitious Root Regeneration by Modulating Hormone Homeostasis in Picea abies Seedlings
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- Alallaq, Sanaria (author)
- Umeå universitet,Institutionen för fysiologisk botanik,Umeå Plant Science Centre (UPSC),Department of Biology, College of Science for Women, Baghdad University, Baghdad, Iraq
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- Ranjan, Alok (author)
- Umeå universitet,Institutionen för fysiologisk botanik,Umeå Plant Science Centre (UPSC)
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- Brunoni, Federica (author)
- Umeå universitet,Institutionen för fysiologisk botanik,Umeå Plant Science Centre (UPSC)
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- Novak, Ondrej (author)
- Swedish University of Agricultural Sciences,Sveriges lantbruksuniversitet,Institutionen för skoglig genetik och växtfysiologi,Department of Forest Genetics and Plant Physiology,Palacký University Olomouc,Institute of Experimental Botany ASCR
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- Lakehal, Abdellah (author)
- Umeå universitet,Institutionen för fysiologisk botanik,Umeå Plant Science Centre (UPSC)
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- Bellini, Catherine, 1962- (author)
- Umeå universitet,Umeå Plant Science Centre (UPSC),Institutionen för fysiologisk botanik,Institut Jean-Pierre Bourgin, INRAE, AgroParisTech, Universite´ Paris-Saclay, Versailles, France
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(creator_code:org_t)
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- 2020-09-09
- 2020
- English.
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In: Frontiers in Plant Science. - : Frontiers Media S.A.. - 1664-462X. ; 11
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Abstract
Subject headings
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- 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.
Subject headings
- NATURVETENSKAP -- Biologi -- Botanik (hsv//swe)
- NATURAL SCIENCES -- Biological Sciences -- Botany (hsv//eng)
Keyword
- adventitious roots
- conifers
- Picea abies
- auxin
- cytokinins
- jasmonate
- red light
- root development
Publication and Content Type
- ref (subject category)
- art (subject category)
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