A novel Arabidopsis MYB-like transcription factor, MYBH, regulates hypocotyl elongation by

Yerim Kwon, Jun Hyeok Kim, Hoai Nguyen Nguyen, Yusuke Jikumaru, Yuji Kamiya, Suk Whan Hong, Hojoung Lee

Research output: Contribution to journalArticle

23 Citations (Scopus)

Abstract

Critical responses to developmental or environmental stimuli are mediated by different transcription factors, including members of the ERF, bZIP, MYB, MYC, and WRKY families. Of these, MYB genes play roles in many developmental processes. The overexpression of one MYB gene, MYBH, significantly increased hypocotyl elongation in Arabidopsis thaliana plants grown in the light, and the expression of this gene increased markedly in the dark. The MYBH protein contains a conserved motif, R/KLFGV, which was implicated in transcriptional repression. Interestingly, the gibberellin biosynthesis inhibitor paclobutrazol blocked the increase in hypocotyl elongation in seedlings that overexpressed MYBH. Moreover, the function of MYBH was dependent on phytochrome-interacting factor (PIF) proteins. Taken together, these results suggest that hypocotyl elongation is regulated by a delicate and efficient mechanism in which MYBH expression is triggered by challenging environmental conditions such as darkness, leading to an increase in PIF accumulation and subsequent enhanced auxin biosynthesis. These results indicate that MYBH is one of the molecular components that regulate hypocotyl elongation in response to darkness.

Original languageEnglish
Pages (from-to)3911-3922
Number of pages12
JournalJournal of Experimental Botany
Volume64
Issue number12
DOIs
Publication statusPublished - 2013 Sep 1

Fingerprint

Hypocotyl
hypocotyls
transcription factors
Arabidopsis
Phytochrome
Darkness
phytochrome
biosynthesis
Gibberellins
Indoleacetic Acids
paclobutrazol
Seedlings
gibberellins
Genes
auxins
Proteins
Transcription Factors
genes
Arabidopsis thaliana
proteins

Keywords

  • Arabidopsis
  • auxin
  • hypocotyl elongation
  • MYBH
  • photomorphogenesis
  • PIF

ASJC Scopus subject areas

  • Plant Science
  • Physiology

Cite this

A novel Arabidopsis MYB-like transcription factor, MYBH, regulates hypocotyl elongation by. / Kwon, Yerim; Kim, Jun Hyeok; Nguyen, Hoai Nguyen; Jikumaru, Yusuke; Kamiya, Yuji; Hong, Suk Whan; Lee, Hojoung.

In: Journal of Experimental Botany, Vol. 64, No. 12, 01.09.2013, p. 3911-3922.

Research output: Contribution to journalArticle

Kwon, Yerim ; Kim, Jun Hyeok ; Nguyen, Hoai Nguyen ; Jikumaru, Yusuke ; Kamiya, Yuji ; Hong, Suk Whan ; Lee, Hojoung. / A novel Arabidopsis MYB-like transcription factor, MYBH, regulates hypocotyl elongation by. In: Journal of Experimental Botany. 2013 ; Vol. 64, No. 12. pp. 3911-3922.
@article{0845ac61237b4172b87daa2427439d33,
title = "A novel Arabidopsis MYB-like transcription factor, MYBH, regulates hypocotyl elongation by",
abstract = "Critical responses to developmental or environmental stimuli are mediated by different transcription factors, including members of the ERF, bZIP, MYB, MYC, and WRKY families. Of these, MYB genes play roles in many developmental processes. The overexpression of one MYB gene, MYBH, significantly increased hypocotyl elongation in Arabidopsis thaliana plants grown in the light, and the expression of this gene increased markedly in the dark. The MYBH protein contains a conserved motif, R/KLFGV, which was implicated in transcriptional repression. Interestingly, the gibberellin biosynthesis inhibitor paclobutrazol blocked the increase in hypocotyl elongation in seedlings that overexpressed MYBH. Moreover, the function of MYBH was dependent on phytochrome-interacting factor (PIF) proteins. Taken together, these results suggest that hypocotyl elongation is regulated by a delicate and efficient mechanism in which MYBH expression is triggered by challenging environmental conditions such as darkness, leading to an increase in PIF accumulation and subsequent enhanced auxin biosynthesis. These results indicate that MYBH is one of the molecular components that regulate hypocotyl elongation in response to darkness.",
keywords = "Arabidopsis, auxin, hypocotyl elongation, MYBH, photomorphogenesis, PIF",
author = "Yerim Kwon and Kim, {Jun Hyeok} and Nguyen, {Hoai Nguyen} and Yusuke Jikumaru and Yuji Kamiya and Hong, {Suk Whan} and Hojoung Lee",
year = "2013",
month = "9",
day = "1",
doi = "10.1093/jxb/ert223",
language = "English",
volume = "64",
pages = "3911--3922",
journal = "Journal of Experimental Botany",
issn = "0022-0957",
publisher = "Oxford University Press",
number = "12",

}

TY - JOUR

T1 - A novel Arabidopsis MYB-like transcription factor, MYBH, regulates hypocotyl elongation by

AU - Kwon, Yerim

AU - Kim, Jun Hyeok

AU - Nguyen, Hoai Nguyen

AU - Jikumaru, Yusuke

AU - Kamiya, Yuji

AU - Hong, Suk Whan

AU - Lee, Hojoung

PY - 2013/9/1

Y1 - 2013/9/1

N2 - Critical responses to developmental or environmental stimuli are mediated by different transcription factors, including members of the ERF, bZIP, MYB, MYC, and WRKY families. Of these, MYB genes play roles in many developmental processes. The overexpression of one MYB gene, MYBH, significantly increased hypocotyl elongation in Arabidopsis thaliana plants grown in the light, and the expression of this gene increased markedly in the dark. The MYBH protein contains a conserved motif, R/KLFGV, which was implicated in transcriptional repression. Interestingly, the gibberellin biosynthesis inhibitor paclobutrazol blocked the increase in hypocotyl elongation in seedlings that overexpressed MYBH. Moreover, the function of MYBH was dependent on phytochrome-interacting factor (PIF) proteins. Taken together, these results suggest that hypocotyl elongation is regulated by a delicate and efficient mechanism in which MYBH expression is triggered by challenging environmental conditions such as darkness, leading to an increase in PIF accumulation and subsequent enhanced auxin biosynthesis. These results indicate that MYBH is one of the molecular components that regulate hypocotyl elongation in response to darkness.

AB - Critical responses to developmental or environmental stimuli are mediated by different transcription factors, including members of the ERF, bZIP, MYB, MYC, and WRKY families. Of these, MYB genes play roles in many developmental processes. The overexpression of one MYB gene, MYBH, significantly increased hypocotyl elongation in Arabidopsis thaliana plants grown in the light, and the expression of this gene increased markedly in the dark. The MYBH protein contains a conserved motif, R/KLFGV, which was implicated in transcriptional repression. Interestingly, the gibberellin biosynthesis inhibitor paclobutrazol blocked the increase in hypocotyl elongation in seedlings that overexpressed MYBH. Moreover, the function of MYBH was dependent on phytochrome-interacting factor (PIF) proteins. Taken together, these results suggest that hypocotyl elongation is regulated by a delicate and efficient mechanism in which MYBH expression is triggered by challenging environmental conditions such as darkness, leading to an increase in PIF accumulation and subsequent enhanced auxin biosynthesis. These results indicate that MYBH is one of the molecular components that regulate hypocotyl elongation in response to darkness.

KW - Arabidopsis

KW - auxin

KW - hypocotyl elongation

KW - MYBH

KW - photomorphogenesis

KW - PIF

UR - http://www.scopus.com/inward/record.url?scp=84883258508&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84883258508&partnerID=8YFLogxK

U2 - 10.1093/jxb/ert223

DO - 10.1093/jxb/ert223

M3 - Article

C2 - 23888064

AN - SCOPUS:84883258508

VL - 64

SP - 3911

EP - 3922

JO - Journal of Experimental Botany

JF - Journal of Experimental Botany

SN - 0022-0957

IS - 12

ER -