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'Plastids' in keywords Facet   section ZfN Section C:Volume 054  [X]
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1999 (1)
1Author    Jasmina Muraja-Ljubičić, Mercedes Wrischer, Nikola LjubešićRequires cookie*
 Title    Influence of the Herbicides Amitrole and Norflurazon on Greening of Illuminated Potato Microtubers  
 Abstract    Potato microtubers turn green within a few days when kept in the light. The initial phases in this process were observed as early as 12 hours after the onset of illumination. The changes included a pronounced increase in chlorophyll and carotenoid concentrations, accompanied by changes in the protein pattern and in the transformation of amyloplasts and leucoplasts to chloroplasts. The bleaching herbicides amitrole and norflurazon inhibited the synthesis of carotenoids in the illuminated potato microtubers. However, amitrole only delayed greening and an increase in chlorophyll and carotenoid levels became visible as late as four days after the onset of illumination, and the LHC II protein of the photosynthetic membrane was not detected before the seventh day of light exposure. Norflurazon, in contrast, acted as a stronger inhibitor, and microtuber tissues stayed yellowish throughout the experiment. The concentrations of both carotenoids and chlorophylls were very low in tissues treated with this herbicide. The LHC II protein could not be detected after a seven-day light exposure and the plastids were damaged, small in size, without normal thylakoids and with numer­ ous plastoglobules. 
  Reference    Z. Naturforsch. 54c, 333 (1999); received November 30 1998/January 21 1999 
  Published    1999 
  Keywords    Solanum tuberosum L cv Istra, Microtuber, Plastid, Amitrole, Norflurazon 
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 TEI-XML for    default:Reihe_C/54/ZNC-1999-54c-0333.pdf 
 Identifier    ZNC-1999-54c-0333 
 Volume    54