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Silver ions increase auxin efflux independently of effects on ethylene response.

Publication ,  Journal Article
Strader, LC; Beisner, ER; Bartel, B
Published in: The Plant cell
November 2009

Silver nitrate and aminoethoxyvinylglycine (AVG) are often used to inhibit perception and biosynthesis, respectively, of the phytohormone ethylene. In the course of exploring the genetic basis of the extensive interactions between ethylene and auxin, we compared the effects of silver nitrate (AgNO(3)) and AVG on auxin responsiveness. We found that although AgNO(3) dramatically decreased root indole-3-acetic acid (IAA) responsiveness in inhibition of root elongation, promotion of DR5-beta-glucuronidase activity, and reduction of Aux/IAA protein levels, AVG had more mild effects. Moreover, we found that that silver ions, but not AVG, enhanced IAA efflux similarly in root tips of both the wild type and mutants with blocked ethylene responses, indicating that this enhancement was independent of ethylene signaling. Our results suggest that the promotion of IAA efflux by silver ions is independent of the effects of silver ions on ethylene perception. Although the molecular details of this enhancement remain unknown, our finding that silver ions can promote IAA efflux in addition to blocking ethylene signaling suggest that caution is warranted in interpreting studies using AgNO(3) to block ethylene signaling in roots.

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Published In

The Plant cell

DOI

EISSN

1532-298X

ISSN

1040-4651

Publication Date

November 2009

Volume

21

Issue

11

Start / End Page

3585 / 3590

Related Subject Headings

  • Silver Nitrate
  • Signal Transduction
  • Plant Roots
  • Plant Biology & Botany
  • Indoleacetic Acids
  • Growth Inhibitors
  • Glycine
  • Glucuronidase
  • Ethylenes
  • Drug Interactions
 

Citation

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Strader, L. C., Beisner, E. R., & Bartel, B. (2009). Silver ions increase auxin efflux independently of effects on ethylene response. The Plant Cell, 21(11), 3585–3590. https://doi.org/10.1105/tpc.108.065185
Strader, Lucia C., Erin R. Beisner, and Bonnie Bartel. “Silver ions increase auxin efflux independently of effects on ethylene response.The Plant Cell 21, no. 11 (November 2009): 3585–90. https://doi.org/10.1105/tpc.108.065185.
Strader LC, Beisner ER, Bartel B. Silver ions increase auxin efflux independently of effects on ethylene response. The Plant cell. 2009 Nov;21(11):3585–90.
Strader, Lucia C., et al. “Silver ions increase auxin efflux independently of effects on ethylene response.The Plant Cell, vol. 21, no. 11, Nov. 2009, pp. 3585–90. Epmc, doi:10.1105/tpc.108.065185.
Strader LC, Beisner ER, Bartel B. Silver ions increase auxin efflux independently of effects on ethylene response. The Plant cell. 2009 Nov;21(11):3585–3590.

Published In

The Plant cell

DOI

EISSN

1532-298X

ISSN

1040-4651

Publication Date

November 2009

Volume

21

Issue

11

Start / End Page

3585 / 3590

Related Subject Headings

  • Silver Nitrate
  • Signal Transduction
  • Plant Roots
  • Plant Biology & Botany
  • Indoleacetic Acids
  • Growth Inhibitors
  • Glycine
  • Glucuronidase
  • Ethylenes
  • Drug Interactions