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  Silencing Nicotiana attenuata LHY and ZTL alters circadian rhythms in flowers

Yon, F., Joo, Y., Cortés Llorca, L., Rothe, E., Baldwin, I. T., & Kim, S.-G. (2016). Silencing Nicotiana attenuata LHY and ZTL alters circadian rhythms in flowers. New Phytologist, 209(3), 1058-1066. doi:10.1111/nph.13681.

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http://dx.doi.org/10.1111/nph.13681 (Publisher version)
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 Creators:
Yon, Felipe1, 2, Author              
Joo, Youngsung1, 2, Author              
Cortés Llorca, Lucas1, Author              
Rothe, Eva1, Author              
Baldwin, Ian Thomas1, Author              
Kim, Sang-Gyu1, 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 rhythmic opening/closing and volatile emissions of flowers are known to attract pollinators at specific times. That these rhythms are maintained under constant light or dark conditions suggests a circadian clock involvement. Although a forward and reverse genetic approach has led to the identification of core circadian clock components in Arabidopsis thaliana, the involvement of these clock components in floral rhythms has remained untested, probably because of the weak diurnal rhythms in A. thaliana flowers. Here, we addressed the role of these core clock components in the flowers of the wild tobacco Nicotiana attenuata, whose flowers open at night, emit benzyl acetone (BA) scents and move vertically through a 140° arc. We first measured N. attenuata floral rhythms under constant light conditions. The results suggest that the circadian clock controls flower opening, BA emission and pedicel movement, but not flower closing. We generated transgenic N. attenuata lines silenced in the homologous genes of Arabidopsis LATE ELONGATED HYPOCOTYL (LHY) and ZEITLUPE (ZTL), which are known to be core clock components. Silencing NaLHY and NaZTL strongly altered floral rhythms in different ways, indicating that conserved clock components in N. attenuata coordinate these floral rhythms.

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 Dates: 2015-08-222016-10-062016
 Publication Status: Published in print
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 Identifiers: Other: ITB504
DOI: 10.1111/nph.13681
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Title: New Phytologist
  Other : New Phytol.
Source Genre: Journal
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Publ. Info: London : Academic Press.
Pages: - Volume / Issue: 209 (3) Sequence Number: - Start / End Page: 1058 - 1066 Identifier: ISSN: 0028-646X
CoNE: https://pure.mpg.de/cone/journals/resource/954925334695