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@ARTICLE{nnep:183572,
      author       = {Ünnep, R. and Zsiros, O. and Solymosi, K. and Kovács, L.
                      and Lambrev, P. H. and Tóth, T. and Schweins, R. and
                      Posselt, D. and Szekely, Noemi and Rosta, L. and Nagy, G.
                      and Garab, G.},
      title        = {{T}he ultrastructure and flexibility of thylakoid membranes
                      in leaves and isolated chloroplasts as revealed by
                      small-angle neutron scattering},
      journal      = {Biochimica et biophysica acta / Bioenergetics},
      volume       = {1837},
      number       = {9},
      issn         = {0005-2728},
      address      = {Amsterdam},
      publisher    = {Elsevier},
      reportid     = {FZJ-2014-06866},
      pages        = {1572 - 1580},
      year         = {2014},
      abstract     = {We studied the periodicity of the multilamellar membrane
                      system of granal chloroplasts in different isolated plant
                      thylakoid membranes, using different suspension media, as
                      well as on different detached leaves and isolated
                      protoplasts—using small-angle neutron scattering. Freshly
                      isolated thylakoid membranes suspended in isotonic or
                      hypertonic media, containing sorbitol supplemented with
                      cations, displayed Bragg peaks typically between 0.019 and
                      0.023 Å− 1, corresponding to spatially and statistically
                      averaged repeat distance values of about 275–330 Å.
                      Similar data obtained earlier led us in previous work to
                      propose an origin from the periodicity of stroma thylakoid
                      membranes. However, detached leaves, of eleven different
                      species, infiltrated with or soaked in D2O in dim laboratory
                      light or transpired with D2O prior to measurements,
                      exhibited considerably smaller repeat distances, typically
                      between 210 and 230 Å, ruling out a stromal membrane
                      origin. Similar values were obtained on isolated tobacco and
                      spinach protoplasts. When NaCl was used as osmoticum, the
                      Bragg peaks of isolated thylakoid membranes almost coincided
                      with those in the same batch of leaves and the repeat
                      distances were very close to the electron microscopically
                      determined values in the grana. Although neutron scattering
                      and electron microscopy yield somewhat different values,
                      which is not fully understood, we can conclude that
                      small-angle neutron scattering is a suitable technique to
                      study the periodic organization of granal thylakoid
                      membranes in intact leaves under physiological conditions
                      and with a time resolution of minutes or shorter. We also
                      show here, for the first time on leaves, that the
                      periodicity of thylakoid membranes in situ responds
                      dynamically to moderately strong illumination. This article
                      is part of a Special Issue entitled: Photosynthesis research
                      for sustainability: Keys to produce clean energy.},
      cin          = {JCNS (München) ; Jülich Centre for Neutron Science JCNS
                      (München) ; JCNS-FRM-II / Neutronenstreuung ; JCNS-1 /
                      ICS-1},
      ddc          = {570},
      cid          = {I:(DE-Juel1)JCNS-FRM-II-20110218 /
                      I:(DE-Juel1)JCNS-1-20110106 / I:(DE-Juel1)ICS-1-20110106},
      pnm          = {54G - JCNS (POF2-54G24)},
      pid          = {G:(DE-HGF)POF2-54G24},
      experiment   = {EXP:(DE-MLZ)KWS2-20140101},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000341474300024},
      pubmed       = {pmid:24508217},
      doi          = {10.1016/j.bbabio.2014.01.017},
      url          = {https://juser.fz-juelich.de/record/183572},
}