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  Stem-piped light activates phytochrome B to trigger light responses in Arabidopsis thaliana roots

Lee, H.-J., Ha, J.-H., Kim, S.-G., Choi, H.-K., Kim, Z. H., Han, Y.-J., et al. (2016). Stem-piped light activates phytochrome B to trigger light responses in Arabidopsis thaliana roots. Science Signaling, 9(452): ra106. doi:10.1126/scisignal.aaf6530.

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Item Permalink: https://hdl.handle.net/11858/00-001M-0000-002B-A1F0-D Version Permalink: https://hdl.handle.net/21.11116/0000-0009-31BB-D
Genre: Journal Article

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ITB532.pdf (Publisher version), 1023KB
 
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 Creators:
Lee, H.-J., Author
Ha, J.-H., Author
Kim, Sang-Gyu1, Author           
Choi, H.-K., Author
Kim, Z. H., Author
Han, Y.-J., Author
Kim, J.-I., Author
Oh, Youngjoo1, 2, Author           
Fragoso, Variluska1, 2, Author           
Shin, K., Author
Hyeon, T., Author
Choi, H.-G., Author
Oh, K.-H., Author
Baldwin, Ian Thomas1, Author           
Park, C.-M., Author
Affiliations:
1Department of Molecular Ecology, Prof. I. T. Baldwin, MPI for Chemical Ecology, Max Planck Society, ou_24029              
2IMPRS on Ecological Interactions, MPI for Chemical Ecology, Max Planck Society, Jena, DE, ou_421900              

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 Abstract: The roles of photoreceptors and their associated signalingmechanisms have been extensively studied in plant photomorphogenesis
with amajor focus on the photoresponses of the shoot system. Accumulating evidence indicates that
light also influences root growth and development through the light-induced release of signaling molecules that travel
from the shoot to the root.We explored whether aboveground light directly influences the root system of Arabidopsis
thaliana. Light was efficiently conducted through the stems to the roots, where photoactivated phytochrome B (phyB)
triggered expression of ELONGATED HYPOCOTYL 5 (HY5) and accumulation of HY5 protein, a transcription factor that
promotes root growth in response to light. Stimulation of HY5 in response to illumination of only the shoot was reduced
when root tissues carried a loss-of-functionmutation in PHYB, and HY5 mutant roots exhibited alterations in root
growth and gravitropism in response to shoot illumination. These findings demonstrate that the underground roots
directly sense stem-piped light to monitor the aboveground light environment during plant environmental adaptation.

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 Dates: 201620162016-11-01
 Publication Status: Issued
 Pages: -
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 Table of Contents: -
 Rev. Type: -
 Identifiers: Other: ITB532
DOI: 10.1126/scisignal.aaf6530
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Title: Science Signaling
Source Genre: Journal
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Publ. Info: American Association for the Advancement of Science
Pages: - Volume / Issue: 9 (452) Sequence Number: ra106 Start / End Page: - Identifier: ISSN: 1945-0877
CoNE: https://pure.mpg.de/cone/journals/resource/1945-0877