---
reference_id: PMID:22483719
title: Control of seed germination by light-induced histone arginine demethylation activity.
authors:
- Cho JN
- Ryu JY
- Jeong YM
- Park J
- Song JJ
- Amasino RM
- Noh B
- Noh YS
journal: Dev Cell
year: '2012'
doi: 10.1016/j.devcel.2012.01.024
keywords:
- "Arabidopsis/genetics, growth & development, metabolism"
- "Arabidopsis Proteins/genetics, metabolism"
- Arginine/metabolism
- "Carrier Proteins/genetics, metabolism"
- Chromatin Immunoprecipitation
- Electrophoretic Mobility Shift Assay
- "Gene Expression Regulation, Plant"
- Germination/physiology
- Gibberellins/pharmacology
- "Histone Demethylases/genetics, metabolism"
- Histones/metabolism
- Light
- Methylation/radiation effects
- "Phytochrome B/genetics, metabolism"
- "Plants, Genetically Modified"
- "Promoter Regions, Genetic/genetics"
- "Seeds/genetics, growth & development, metabolism"
content_type: abstract_only
full_text_attempted: true
---

# Control of seed germination by light-induced histone arginine demethylation activity.
**Authors:** Cho JN, Ryu JY, Jeong YM, Park J, Song JJ, Amasino RM, Noh B, Noh YS
**Journal:** Dev Cell (2012)
**DOI:** [10.1016/j.devcel.2012.01.024](https://doi.org/10.1016/j.devcel.2012.01.024)

## Content

1. Dev Cell. 2012 Apr 17;22(4):736-48. doi: 10.1016/j.devcel.2012.01.024. Epub
2012  Apr 5.

Control of seed germination by light-induced histone arginine demethylation 
activity.

Cho JN(1), Ryu JY, Jeong YM, Park J, Song JJ, Amasino RM, Noh B, Noh YS.

Author information:
(1)School of Biological Sciences, Seoul National University, Seoul 151-747, 
Korea.

Comment in
    Dev Cell. 2012 Apr 17;22(4):687-8. doi: 10.1016/j.devcel.2012.04.003.

For optimal survival, various environmental and endogenous factors should be 
monitored to determine the appropriate timing for seed germination. Light is a 
major environmental factor affecting seed germination, which is perceived by 
phytochromes. The light-dependent activation of phytochrome B (PHYB) modulates 
abscisic acid and gibberellic acid signaling and metabolism. Thus far, several 
negative regulators of seed germination that act when PHYB is inactive have been 
reported. However, neither positive regulators of seed germination downstream of 
PHYB nor a direct mechanism for regulation of the hormone levels has been 
elucidated. Here, we show that the histone arginine demethylases, JMJ20 and 
JMJ22, act redundantly as positive regulators of seed germination. When PHYB is 
inactive, JMJ20/JMJ22 are directly repressed by the zinc-finger protein SOMNUS. 
However, upon PHYB activation, JMJ20/JMJ22 are derepressed, resulting in 
increased gibberellic acid levels through the removal of repressive histone 
arginine methylations at GA3ox1/GA3ox2, which in turn promotes seed germination.

Copyright © 2012 Elsevier Inc. All rights reserved.

DOI: 10.1016/j.devcel.2012.01.024
PMID: 22483719 [Indexed for MEDLINE]