TTG1-mediated flavonols biosynthesis alleviates root growth inhibition in response to ABA

Hoai Nguyen Nguyen, Jun Hyeok Kim, Woo Young Hyun, Ngoc Trinh Nguyen, Suk Whan Hong, Hojoung Lee

Research output: Contribution to journalArticle

15 Citations (Scopus)

Abstract

Key message: Our results demonstrate that the flavonoids biosynthetic pathway can be effectively manipulated to confer enhanced plant root growth under water-stress conditions. Abscisic acid (ABA) is one of most important phytohormones. It functions in various processes during the plant lifecycle. Previous studies indicate that ABA has a negative effect on root growth and branching. Auxin is another key plant growth regulator that plays an essential role in plant growth and development. In contrast to ABA, auxin is a positive regulator of root growth and development at low concentrations. This study was performed to help understand whether flavonoids can suppress the effect of ABA on lateral root growth. The recessive TRANSPARENT TESTA GLABRA 1 (ttg1) mutant was characterized on ABA and sucrose treatments. It was determined that auxin mobilization could be altered by modifying flavonoids biosynthesis, which resulted in alterations of root architecture in response to ABA treatment. Moreover, transgenic TTG1-overexpression (TTG1-OX) seedlings exhibited enhanced root length and lateral root number compared to wild-type seedlings grown under normal or stress conditions. Genetic manipulation of the flavonoids biosynthetic pathway could therefore be employed successfully for the improvement of plant root systems by overcoming the inhibition of ABA and some abiotic stresses.

Original languageEnglish
Pages (from-to)503-514
Number of pages12
JournalPlant Cell Reports
Volume32
Issue number4
DOIs
Publication statusPublished - 2013 Jan 11

Fingerprint

flavonols
growth retardation
abscisic acid
root growth
biosynthesis
flavonoids
auxins
biochemical pathways
growth and development
seedlings
acid treatment
genetic engineering
plant growth substances
plant hormones
abiotic stress
root systems
plant development
branching
water stress
plant growth

Keywords

  • ABA
  • Anthocyanin
  • Arabidopsis thaliana
  • Flavonoids
  • Root growth inhibition
  • TTG1

ASJC Scopus subject areas

  • Plant Science
  • Agronomy and Crop Science

Cite this

TTG1-mediated flavonols biosynthesis alleviates root growth inhibition in response to ABA. / Nguyen, Hoai Nguyen; Kim, Jun Hyeok; Hyun, Woo Young; Nguyen, Ngoc Trinh; Hong, Suk Whan; Lee, Hojoung.

In: Plant Cell Reports, Vol. 32, No. 4, 11.01.2013, p. 503-514.

Research output: Contribution to journalArticle

Nguyen, Hoai Nguyen ; Kim, Jun Hyeok ; Hyun, Woo Young ; Nguyen, Ngoc Trinh ; Hong, Suk Whan ; Lee, Hojoung. / TTG1-mediated flavonols biosynthesis alleviates root growth inhibition in response to ABA. In: Plant Cell Reports. 2013 ; Vol. 32, No. 4. pp. 503-514.
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