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@ARTICLE{Bergougnoux:22564,
      author       = {Bergougnoux, V. and Zalabák, D. and Jandová, M. and
                      Novák, O. and Wiese-Klinkenberg, A. and Fellner, M.},
      title        = {{E}ffect of {B}lue {L}ight on {E}ndogenous
                      {I}sopentenyladenine and {E}ndoreduplication during
                      {P}hotomorphogenesis and {D}e-{E}tiolation of {T}omato
                      ({S}olanum lycopersicum {L}.) {S}eedlings},
      journal      = {PLoS one},
      volume       = {7},
      number       = {9},
      issn         = {1932-6203},
      address      = {Lawrence, Kan.},
      publisher    = {PLoS},
      reportid     = {PreJuSER-22564},
      pages        = {e45255},
      year         = {2012},
      note         = {Record converted from VDB: 12.11.2012},
      abstract     = {Light is one of the most important factor influencing plant
                      growth and development all through their life cycle. One of
                      the well-known light-regulated processes is de-etiolation,
                      i.e. the switch from skotomorphogenesis to
                      photomorphogenesis. The hormones cytokinins (CKs) play an
                      important role during the establishment of
                      photomorphogenesis as exogenous CKs induced
                      photomorphogenesis of dark-grown seedlings. Most of the
                      studies are conducted on the plant model Arabidopsis, but no
                      or few information are available for important crop species,
                      such as tomato (Solanum lycopersicum L.). In our study, we
                      analyzed for the first time the endogenous CKs content in
                      tomato hypocotyls during skotomorphogenesis,
                      photomorphogenesis and de-etiolation. For this purpose, two
                      tomato genotypes were used: cv. Rutgers (wild-type; WT) and
                      its corresponding mutant (7B-1) affected in its responses to
                      blue light (BL). Using physiological and molecular
                      approaches, we identified that the skotomorphogenesis is
                      characterized by an endoreduplication-mediated cell
                      expansion, which is inhibited upon BL exposure as seen by
                      the accumulation of trancripts encoding CycD3, key
                      regulators of the cell cycle. Our study showed for the first
                      time that iP (isopentenyladenine) is the CK accumulated in
                      the tomato hypocotyl upon BL exposure, suggesting its
                      specific role in photomorphogenesis. This result was
                      supported by physiological experiments and gene expression
                      data. We propose a common model to explain the role and the
                      relationship between CKs, namely iP, and endoreduplication
                      during de-etiolation and photomorphogenesis.},
      cin          = {IBG-2},
      ddc          = {500},
      cid          = {I:(DE-Juel1)IBG-2-20101118},
      pnm          = {Terrestrische Umwelt},
      pid          = {G:(DE-Juel1)FUEK407},
      typ          = {PUB:(DE-HGF)16},
      pubmed       = {pmid:23049779},
      pmc          = {pmc:PMC3458014},
      UT           = {WOS:000309556100033},
      doi          = {10.1371/journal.pone.0045255},
      url          = {https://juser.fz-juelich.de/record/22564},
}