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  Thermal plasticity of the circadian clock is under nuclear and cytoplasmic control in wild barley

Bdolach, E., Prusty, M. R., Faigenboim-Doron, A., Filichkin, T., Helgerson, L., Schmid, K. J., et al. (2019). Thermal plasticity of the circadian clock is under nuclear and cytoplasmic control in wild barley. Plant, Cell and Environment, 42(11), 3105-3120. doi:10.1111/pce.13606.

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Bdolach, Eyal1, Author
Prusty, Manas Ranjan1, Author
Faigenboim-Doron, Adi1, Author
Filichkin, Tanya1, Author
Helgerson, Laura1, Author
Schmid, Karl J.1, Author
Greiner, S.2, Author              
Fridman, Eyal1, Author
Affiliations:
1External Organizations, ou_persistent22              
2Cytoplasmic and Evolutionary Genetics, Department Bock, Max Planck Institute of Molecular Plant Physiology, Max Planck Society, ou_1753324              

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Free keywords: adaptation, circadian clock, plasmotype, plasticity, QTL by environment interactions, robustness, wild barley
 Abstract: Abstract Temperature compensation, expressed as the ability to maintain clock characteristics (mainly period) in face of temperature changes, that is, robustness, is considered a key feature of circadian clock systems. In this study, we explore the genetic basis for lack of robustness, that is, plasticity, of circadian clock as reflected by photosynthesis rhythmicity. The clock rhythmicity of a new wild barley reciprocal doubled haploid population was analysed with a high temporal resolution of pulsed amplitude modulation of chlorophyll fluorescence under optimal (22°C) and high (32°C) temperature. This comparison between two environments pointed to the prevalence of clock acceleration under heat. Genotyping by sequencing of doubled haploid lines indicated a rich recombination landscape with minor fixation (less than 8%) for one of the parental alleles. Quantitative genetic analysis included genotype by environment interactions and binary-threshold models. Variation in the circadian rhythm plasticity phenotypes, expressed as change (delta) of period and amplitude under two temperatures, was associated with maternal organelle genome (the plasmotype), as well as with several nuclear loci. This first reported rhythmicity driven by nuclear loci and plasmotype with few identified variants, paves the way for studying impact of cytonuclear variations on clock robustness and on plant adaptation to changing environments.

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Language(s): eng - English
 Dates: 2019
 Publication Status: Published in print
 Pages: -
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 Table of Contents: -
 Rev. Type: -
 Identifiers: DOI: 10.1111/pce.13606
BibTex Citekey: doi:10.1111/pce.13606
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Title: Plant, Cell and Environment
  Other : Plant, Cell & Environment
Source Genre: Journal
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Publ. Info: Oxford, England : Blackwell Science
Pages: - Volume / Issue: 42 (11) Sequence Number: - Start / End Page: 3105 - 3120 Identifier: ISSN: 0140-7791
CoNE: https://pure.mpg.de/cone/journals/resource/954925471334