---
res:
  bibo_abstract:
  - Although cytokinins (CKs) affect a number of processes connected with chloroplasts,
    it has never been rigorously proven that chloroplasts contain CKs. We isolated
    intact chloroplasts from tobacco (Nicotiana tabacum L. cv SR1) and wheat (Triticum
    aestivum L. cv Ritmo) leaves and determined their CKs by liquid chromatography/tandem
    mass spectroscopy. Chloroplasts from both species contained a whole spectrum of
    CKs, including free bases (zeatin and isopentenyladenine), ribosides (zeatin riboside,
    and isopentenyladenosine), ribotides (isopentenyladenosine-5′-monophosphate, zeatin
    riboside-5′-monophosphate, and dihydrozeatin riboside-5′-monophosphate), and N-glucosides
    (zeatin-N 9-glucoside, dihydrozeatin-N 9-glucoside, zeatin-N 7-glucoside, and
    isopentenyladenine-N-glucosides). In chloroplasts there was a moderately higher
    relative amount of bases, ribosides, and ribotides than in leaves, and a significantly
    increased level ofN 9-glucosides of zeatin and dihydrozeatin. Tobacco and wheat
    chloroplasts were prepared from leaves at the end of either a dark or light period.
    After a dark period, chloroplasts accumulated more CKs than after a light period.
    The differences were moderate for free bases and ribosides, but highly significant
    for glucosides. Tobacco chloroplasts from dark-treated leaves contained zeatin
    riboside-O-glucoside and dihydrozeatin riboside-O-glucoside, as well as a relatively
    high CK oxidase activity. These data show that chloroplasts contain a whole spectrum
    of CKs and the enzymatic activity necessary for their metabolism. @eng
  bibo_authorlist:
  - foaf_Person:
      foaf_givenName: Eva
      foaf_name: Benková, Eva
      foaf_surname: Benková
      foaf_workInfoHomepage: http://www.librecat.org/personId=38F4F166-F248-11E8-B48F-1D18A9856A87
    orcid: 0000-0002-8510-9739
  - foaf_Person:
      foaf_givenName: Erwin
      foaf_name: Witters, Erwin
      foaf_surname: Witters
  - foaf_Person:
      foaf_givenName: Walter
      foaf_name: Van Dongen, Walter
      foaf_surname: Van Dongen
  - foaf_Person:
      foaf_givenName: Jan
      foaf_name: Kolář, Jan
      foaf_surname: Kolář
  - foaf_Person:
      foaf_givenName: Václav
      foaf_name: Motyka, Václav
      foaf_surname: Motyka
  - foaf_Person:
      foaf_givenName: Břetislav
      foaf_name: Brzobohatý, Břetislav
      foaf_surname: Brzobohatý
  - foaf_Person:
      foaf_givenName: Henri
      foaf_name: Van Onckelen, Henri
      foaf_surname: Van Onckelen
  - foaf_Person:
      foaf_givenName: Ivana
      foaf_name: Macháčková, Ivana
      foaf_surname: Macháčková
  bibo_doi: 10.1104/pp.121.1.245
  bibo_issue: '1'
  bibo_volume: 121
  dct_date: 1999^xs_gYear
  dct_isPartOf:
  - http://id.crossref.org/issn/0032-0889
  dct_language: eng
  dct_publisher: American Society of Plant Biologists@
  dct_title: Cytokinins in tobacco and wheat chloroplasts. Occurrence and changes
    due to light/dark treatment@
  fabio_hasPubmedId: '10482680'
...