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Related Experiment Video

Updated: Jan 3, 2026

Rapid Analysis of Circadian Phenotypes in Arabidopsis Protoplasts Transfected with a Luminescent Clock Reporter

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Published on: September 17, 2016

Light- and temperature-entrainable circadian clock in soybean development.

Yu Wang¹, Li Yuan², Tong Su^3,4

¹Key Laboratory of Molecular and Cell Biology, College of Life Sciences, Hebei Normal University, Shijiazhuang, China.

Plant, Cell & Environment

|November 15, 2019

Summary

Soybean

Keywords:

Circadian clock Flowering time GmLCLs Hairy roots Transgenic Soybean

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Area of Science:

Plant biology
Circadian rhythms
Molecular genetics

Background:

Circadian oscillators in plants offer adaptive advantages.
The molecular basis of the soybean circadian clock remains unknown.

Purpose of the Study:

To investigate the molecular mechanisms of the soybean circadian clock.
To determine the sensitivity of the soybean circadian clock to environmental stimuli.

Main Methods:

Utilized a soybean hairy roots expression system to monitor circadian rhythms.
Employed CRISPR technology to create quadruple mutants for soybean GmLCL genes.
Analyzed gene expression patterns and circadian period under constant and fluctuating conditions.

Main Results:

Identified soybean clock genes GmLCLb2 and GmPRR9b1 promoters driving robust ~24-hour oscillations.
Demonstrated that the soybean circadian clock is entrainable by light/dark and temperature cycles.
Showed that light and cold temperature pulses induce time-dependent phase shifts.
Observed an extreme short-period circadian rhythm and late-flowering phenotype in a quadruple GmLCL mutant.

Conclusions:

The morning-phased GmLCL genes are crucial for maintaining soybean circadian rhythmicity.
Loss of GmLCL function delays the transition from vegetative to reproductive development in soybean.
This study provides foundational insights into soybean circadian clock mechanisms and their environmental regulation.