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Low light intensity delays vegetative phase change

Plants that develop under low light (LL) intensity often display a phenotype known as the “shade tolerance syndrome (STS)”. This syndrome is similar to the phenotype of plants in the juvenile phase of shoot development, but the basis for this similarity is unknown. We tested the hypothesis that the...

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Autores principales: Xu, Mingli, Hu, Tieqiang, Poethig, R Scott
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Oxford University Press 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8566249/
https://www.ncbi.nlm.nih.gov/pubmed/34618024
http://dx.doi.org/10.1093/plphys/kiab243
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author Xu, Mingli
Hu, Tieqiang
Poethig, R Scott
author_facet Xu, Mingli
Hu, Tieqiang
Poethig, R Scott
author_sort Xu, Mingli
collection PubMed
description Plants that develop under low light (LL) intensity often display a phenotype known as the “shade tolerance syndrome (STS)”. This syndrome is similar to the phenotype of plants in the juvenile phase of shoot development, but the basis for this similarity is unknown. We tested the hypothesis that the STS is regulated by the same mechanism that regulates the juvenile vegetative phase by examining the effect of LL on rosette development in Arabidopsis (Arabidopsis thaliana). We found that LL prolonged the juvenile vegetative phase and that this was associated with an increase in the expression of the master regulators of vegetative phase change, miR156 and miR157, and a decrease in the expression of their SQUAMOSA PROMOTER-BINDING PROTEIN-LIKE (SPL) targets. Exogenous sucrose partially corrected the effect of LL on seedling development and miR156 expression. Our results suggest that the response of Arabidopsis to LL is mediated by an increase in miR156/miR157 expression and by factors that repress SPL gene expression independently of miR156/miR157, and is caused in part by a decrease in carbohydrate production. The effect of LL on vegetative phase change does not require the photoreceptors and transcription factors responsible for the shade avoidance syndrome, implying that light intensity and light quality regulate rosette development through different pathways.
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spelling pubmed-85662492021-11-04 Low light intensity delays vegetative phase change Xu, Mingli Hu, Tieqiang Poethig, R Scott Plant Physiol Focus Issue on Architecture and Plasticity Plants that develop under low light (LL) intensity often display a phenotype known as the “shade tolerance syndrome (STS)”. This syndrome is similar to the phenotype of plants in the juvenile phase of shoot development, but the basis for this similarity is unknown. We tested the hypothesis that the STS is regulated by the same mechanism that regulates the juvenile vegetative phase by examining the effect of LL on rosette development in Arabidopsis (Arabidopsis thaliana). We found that LL prolonged the juvenile vegetative phase and that this was associated with an increase in the expression of the master regulators of vegetative phase change, miR156 and miR157, and a decrease in the expression of their SQUAMOSA PROMOTER-BINDING PROTEIN-LIKE (SPL) targets. Exogenous sucrose partially corrected the effect of LL on seedling development and miR156 expression. Our results suggest that the response of Arabidopsis to LL is mediated by an increase in miR156/miR157 expression and by factors that repress SPL gene expression independently of miR156/miR157, and is caused in part by a decrease in carbohydrate production. The effect of LL on vegetative phase change does not require the photoreceptors and transcription factors responsible for the shade avoidance syndrome, implying that light intensity and light quality regulate rosette development through different pathways. Oxford University Press 2021-05-26 /pmc/articles/PMC8566249/ /pubmed/34618024 http://dx.doi.org/10.1093/plphys/kiab243 Text en © The Author(s) 2021. Published by Oxford University Press on behalf of American Society of Plant Biologists. https://creativecommons.org/licenses/by/4.0/This is an Open Access article distributed under the terms of the Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0/), which permits unrestricted reuse, distribution, and reproduction in any medium, provided the original work is properly cited.
spellingShingle Focus Issue on Architecture and Plasticity
Xu, Mingli
Hu, Tieqiang
Poethig, R Scott
Low light intensity delays vegetative phase change
title Low light intensity delays vegetative phase change
title_full Low light intensity delays vegetative phase change
title_fullStr Low light intensity delays vegetative phase change
title_full_unstemmed Low light intensity delays vegetative phase change
title_short Low light intensity delays vegetative phase change
title_sort low light intensity delays vegetative phase change
topic Focus Issue on Architecture and Plasticity
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8566249/
https://www.ncbi.nlm.nih.gov/pubmed/34618024
http://dx.doi.org/10.1093/plphys/kiab243
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