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1998 (1)
1982 (1)
1Author    Franz-C Czygan, Almuth KrügerRequires cookie*
 Title    Actinioerythrin in M ullus barbatus L  
 Abstract    Actinioerythrin has been isolated together with asta-xanthin-esters and /?-carotene from different samples of Mullus barbatus for the first time. 
  Reference    Z. Naturforsch. 37c, 340—341 (1982); eingegangen am 23. November 1981 
  Published    1982 
  Keywords    Mullus barbatus, Carotenoids, Actinioerythrin, Astaxanthin 
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 TEI-XML for    default:Reihe_C/37/ZNC-1982-37c-0340_n.pdf 
 Identifier    ZNC-1982-37c-0340_n 
 Volume    37 
2Author    Lu Fan, Avigad Vonshak, Aliza Zarka, Sammy BoussibaRequires cookie*
 Title    Does Astaxanthin Protect Haematococcus against Light Damage?  
 Abstract    The photoprotective function of the ketocarotenoid astaxanthin in Haematococcus was questioned. When exposed to high irradiance and/or nutritional stress, green Haematococcus cells turned red due to accumulation of an immense quantity of the red pigment astaxanthin. Our results demonstrate that: 1) The addition of diphenylamine, an inhibitor of astaxanthin biosynthesis, causes cell death under high light intensity; 2) Red cells are susceptible to high light stress to the same extent or even higher then green ones upon exposure to a very high light intensity (4000 |j.mol photon m-2 s_1); 3) Addition of '0 2 generators (methylene blue, rose bengal) under noninductive conditions (low light of 100 (imol photon m -2 s_1) induced astaxanthin accumulation. This can be reversed by an exogenous '0 2 quencher (histidine); 4) Histidine can prevent the accumulation of astaxanthin induced by phosphate starvation. We suggest that: 1) Astaxanthin is the result of the photoprotection process rather than the protective agent; 2) ^ 2 is involved indirectly in astaxanthin accumulation process. 
  Reference    Z. Naturforsch. 53c, 93 (1998); received October 28/November 7 1997 
  Published    1998 
  Keywords    Astaxanthin, Haematococcus, High Light, Reactive Oxygen Species (ROS) 
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 TEI-XML for    default:Reihe_C/53/ZNC-1998-53c-0093.pdf 
 Identifier    ZNC-1998-53c-0093 
 Volume    53