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Updated: Oct 17, 2025

Analysis of Arabidopsis thaliana Growth Behavior in Different Light Qualities

Analysis of Arabidopsis thaliana Growth Behavior in Different Light Qualities

Published on: February 2, 2018

Low light intensity delays vegetative phase change.

Mingli Xu^1,2, Tieqiang Hu¹, R Scott Poethig¹

¹Department of Biology, University of Pennsylvania, Philadelphia, Pennsylvania 19104-6018, USA.

Plant Physiology

|October 7, 2021

Summary

This summary is machine-generated.

Low light conditions prolong the juvenile phase in Arabidopsis by increasing miR156/miR157 expression, impacting SQUAMOSA PROMOTER-BINDING PROTEIN-LIKE targets. This suggests light intensity and quality regulate development via distinct pathways.

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Using Changes in Leaf Transmission to Investigate Chloroplast Movement in Arabidopsis thaliana

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Published on: July 14, 2021

Area of Science:

Plant biology
Molecular genetics
Developmental biology

Background:

Plants under low light (LL) exhibit shade tolerance syndrome (STS).
STS resembles the juvenile phase of shoot development, but the underlying mechanism is unclear.

Purpose of the Study:

To investigate if STS is regulated by the same mechanism controlling the juvenile vegetative phase.
To examine the effect of LL on rosette development in Arabidopsis thaliana.

Main Methods:

Assessed the impact of LL on rosette development in Arabidopsis.
Analyzed the expression of miR156, miR157, and their SQUAMOSA PROMOTER-BINDING PROTEIN-LIKE (SPL) targets.
Investigated the effect of exogenous sucrose on seedling development and miR156 expression.

Main Results:

LL prolonged the juvenile vegetative phase in Arabidopsis.
LL increased miR156 and miR157 expression while decreasing SPL target expression.
Exogenous sucrose partially reversed LL's effects on development and miR156 expression.
LL's effect on vegetative phase change is independent of known shade avoidance syndrome pathways.

Conclusions:

Arabidopsis's LL response involves increased miR156/miR157 and repression of SPL genes, partly due to reduced carbohydrate production.
Light intensity and light quality regulate rosette development through separate signaling pathways.