Root cap-dependent gravitropic U-turn of maize root requires light-induced auxin biosynthesis via the YUC pathway in the root apex

Suzuki, Hiromi; Yokawa, Ken; Nakano, Sayuri; Yoshida, Yuki; Fabrissin, Isabelle; Okamoto, Takashi; Baluška, Frantǐsek; Koshiba, Tomokazu

doi:10.1093/jxb/erw232

Cited by 29 publications

(30 citation statements)

References 61 publications

(100 reference statements)

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“…Light influences the direction of polar auxin transport by controlling the plasma membrane abundance of PIN proteins (Laxmi et al, 2008;Sassi et al, 2012;Wan et al, 2012;Zhang et al, 2013Zhang et al, , 2014). An interesting example of how light interacts with the gravitropic output is the U-turn that an inverted maize (Zea mays) seedling root makes when growing in a glass tube exposed to light (Burbach et al, 2012;Suzuki et al, 2016). When these seedlings are inverted in the dark, they do not show this strong gravitropic response (U-turn), indicating that light can increase gravitropism.…”

Section: Interaction Of Light and Gravitropismmentioning

confidence: 99%

Light Signaling, Root Development, and Plasticity

2017

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Section: Interaction Of Light and Gravitropismmentioning

confidence: 99%

Light Signaling, Root Development, and Plasticity

2017

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“…In Arabidopsis thaliana , the photomorphogenesis mutant red1 defective in SUR2/ATR4 (ALTERED TRYPTOPHAN REGULATION 4 ) failed to produce AR on the hypocotyl in red light [ 207 ]. Light is also shown to induce YUCCAs in the maize root [ 208 ]. De novo root organogenesis in Arabidopsis leaf explants involves different YUCCA genes depending on whether explants are incubated in the light or dark.…”

Section: Auxin Biosynthesis As An Integrator Of Environmental Factmentioning

confidence: 99%

Control of Endogenous Auxin Levels in Plant Root Development

Olatunji

Geelen

Verstraeten

2017

IJMS

156

112

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In this review, we summarize the different biosynthesis-related pathways that contribute to the regulation of endogenous auxin in plants. We demonstrate that all known genes involved in auxin biosynthesis also have a role in root formation, from the initiation of a root meristem during embryogenesis to the generation of a functional root system with a primary root, secondary lateral root branches and adventitious roots. Furthermore, the versatile adaptation of root development in response to environmental challenges is mediated by both local and distant control of auxin biosynthesis. In conclusion, auxin homeostasis mediated by spatial and temporal regulation of auxin biosynthesis plays a central role in determining root architecture.

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“…Indole‐3‐acetic acid is the natural endogenous auxin in plants. The application of indole‐3‐acetic acid biosynthesis inhibitors prevents the accumulation of indole‐3‐acetic acid and root curvature of maize seedlings, which is inverted under incubation light conditions . Thus, exogenous auxin was expected to relieve repression of AgNP‐mediated gravitropism.…”

Section: Resultsmentioning

confidence: 99%

Toxicity of silver nanoparticles to Arabidopsis: Inhibition of root gravitropism by interfering with auxin pathway

Sun

Wang

et al. 2017

Enviro Toxic and Chemistry

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Impacts of polyvinylpyrrolidine-coated silver nanoparticles (AgNPs) on root gravitropism in Arabidopsis thaliana were investigated at the physiological, cellular, and molecular levels. Our results showed that AgNPs were taken up by the root and primarily localized at the cell wall and intercellular spaces. Root gravitropism was inhibited by exposure to AgNPs, and the inhibition in root gravitropism caused by exposure to AgNPs exhibited a dose-response relationship. Auxin accumulation was reduced in the root tips because of exposure to AgNPs. However, increased indole-3-acetic acid level could not rescue the inhibition of root gravitropism. Real-time polymerase chain reaction showed significant downregulation of expression of auxin receptor-related genes, which is the TIR1/AFB family of F-box proteins including AFB1, AFB2, AFB3, AFB5, and TIR1. Therefore, the present study suggests that AgNPs have toxicity to the model plant A. thaliana as shown by inhibition of root gravitropism along with a reduction in auxin accumulation and expression of auxin receptors. Environ Toxicol Chem 2017;36:2773-2780. © 2017 SETAC.

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Root cap-dependent gravitropic U-turn of maize root requires light-induced auxin biosynthesis via the YUC pathway in the root apex

Abstract: HighlightThe light-dependent gravitropic U-turn behaviour of maize roots is based on a de novo YUC pathway-dependent increase in auxin abundance in the root apex transition zone

Cited by 29 publications

References 61 publications

Light Signaling, Root Development, and Plasticity

Light Signaling, Root Development, and Plasticity

Control of Endogenous Auxin Levels in Plant Root Development

Toxicity of silver nanoparticles to Arabidopsis: Inhibition of root gravitropism by interfering with auxin pathway

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