Go toArchive
Browse byFacets
Bookbag ( 0 )
'Chlorophyll Protein Complexes' in keywords
Results  4 Items
Sorted by   
Publication Year
1999 (1)
1992 (1)
1982 (2)
1Author    F. Schuler, P. Brandt, W. WießnerRequires cookie*
 Title    Isolierung von PS II-Partikeln mit in vivo Eigenschaften aus Euglena gracilis, Stamm Z Isolation of PS II-Particels with in vivo Characteristics from Euglena gracilis, Stamm Z  
 Abstract    An improved method for isolation of (photosystem II)-particles from Euglena gracilis, strain Z was established. PS II-particles isolated by ultrasonic treatment and following differential centrifugation show fluorescence emission and absorption spectra identical with in vivo properties o f Euglena gracilis. These PS II-particles have only PS II-activity and contain CP a, the typical chlorophyll-protein-complex o f PS II. N o contamination o f PS I-components are detectable. 
  Reference    Z. Naturforsch. 37c, 256—259 (1982); eingegangen am 21. Dezember 1981 
  Published    1982 
  Keywords    Chlorophyll-Protein-Complex, Euglena gracilis, Photosystem II Particle 
  Similar Items    Find
 TEI-XML for    default:Reihe_C/37/ZNC-1982-37c-0256.pdf 
 Identifier    ZNC-1982-37c-0256 
 Volume    37 
2Author    É. Va Sárvári3, Ferenc Fodor3, Edit Cseh3, Anita Vargab, GyulaZ. Árayb, Lello ZollacRequires cookie*
 Title    Relationship between Changes in Ion Content of Leaves and Chlorophyll-Protein Composition in Cucumber under Cd and Pb Stress  
 Abstract    Hydroponically cultured cucumber plants supplied with 4 |.im Fe chelated either with E D T A or citrate and treated with Cd (10 jim) and Pb (10, 50 jam) from their one-or four-leaf stage were grown up to five-week-old age. The decrease in the chlorophyll content was the most pronounced in plants treated with Cd from a younger age, and in the case of Fe-citrate. The chlorophyll a/b ratio of Cd stressed plants was also significantly lowered. In later treated plants the accumulation of chlorophyll was inhibited and the chlorophyll a/b ratio decreased only in the vigorously growing young leaves. Pb treatm ent had only a slight effect on both parameters. The changes in the chlorophyll-protein pattern of thylakoids were strongly related to their chlorophyll content but the response of each complex was different. Cd reduced the amount of chlorophyll containing complexes in the order of photosystem I > light-harvesting complex II > photosystem Il-core, while light-harvesting complex II ap­ peared somewhat more sensitive than photosystem I in Pb treated plants. In accordance, a decline or blue shift of the long wavelength fluorescence emission band of chloroplasts was observed referring to disturbances also in photosystem I antenna assembly. The accumulation of chlorophyll and chlorophyll-proteins did not show close relationship to the heavy metal content of leaves which was the highest in the first of the intensively expanding leaves in the time of the treatm ent. The extraordinary sensitivity of photosystem I, and the relative sta­ bility of photosystem II under Cd treatm ent were similar to the case found in iron deficient plants. However, the pattern of chlorophyll content of leaf storeys of Cd treated plants rather followed the changes in their Mn content. 
  Reference    Z. Naturforsch. 54c, 746 (1999); received November 15 1998/February 18 1999 
  Published    1999 
  Keywords    Cadmium, Chlorophyll-protein complexes, Fluorescence emission Heavy metal stress, Lead 
  Similar Items    Find
 TEI-XML for    default:Reihe_C/54/ZNC-1999-54c-0746.pdf 
 Identifier    ZNC-1999-54c-0746 
 Volume    54 
3Author    Christian Wilhelm, Aloysius WildRequires cookie*
 Title    Growth and Photosynthesis of Nanochlorum eucaryotum, a New and Extremely Small Eucaryotic Green Alga  
 Abstract    Nanochlorum eucaryotum is a very small species o f unicellular coccoid green algae (1.5 nm). The growth of Nanochlorum under different conditions o f salinity, pH and light intensities was studied. Optimal growth rates were observed with normal sea water salinity and low light conditions at pH 7.0. The contents o f chlorophylls, carotinoids, soluble proteins and the chlorophyll a to chlorophyll b ratio were measured. The light saturating curves of Nanochlorum cells grown under light intensities o f 100 lx, 2000 lx and 10000 lx reveal a very narrow capacity of light adaptation. When cultured under higher light intensities, Nanochlorum was not able to reach high photosynthetic activities but underwent a photoinhibition o f photosynthesis. The contents of cytochrome f, P-700 and ribulosebisphosphate carboxylase were low and comparable with those of low light adapted Chlorella cells. The analysis o f the chlorophyll-protein complexes shows that about 80% o f total chlorophyll is bound in the light harvesting chlorophyll protein complexes. All results indicate that Nanochlorum is a low light adapted marine organism with very narrow ecological flexibility. 
  Reference    Z. Naturforsch. 37c, 115—119 (1982); received October 191981 
  Published    1982 
  Keywords    Nanochlorum eucaryotum, Growth, Photosynthesis, Cytochrome f, Chlorophyll-Protein Complexes 
  Similar Items    Find
 TEI-XML for    default:Reihe_C/37/ZNC-1982-37c-0115.pdf 
 Identifier    ZNC-1982-37c-0115 
 Volume    37 
4Author    Zoltán Szigeti, Éva Sárvári, Endre LehoczkiRequires cookie*
 Title    Chlorophyll Proteins and Lipids in Paraquat Treated Sensitive and Resistant Cony za Canadensis Leaves  
 Abstract    Photosynthetic activity and molecular com position o f thylakoid membranes o f sensitive and atrazine/paraquat coresistant biotypes o f Conyza canadensis (L.) Cronq was compared before and after 5 x 10~4 molar paraquat spraying. In contrast to the irreversibly damaged sensitive plants the Rfd values (vitality indices) calculated from parameters o f fluorescence induction curves, and the in vivo C 0 2 fixation in resistant plants showed -after a transitory inhibition -a recovery. Resistant thylakoids contained higher amount o f PS II and LHC II, (i.e. lower relative amount o f CP I) which can be the result o f an adaptation process. Fatty acid com position o f total leaf extract was almost the same in both biotype even after spraying. The amount o f the oligomeric form o f LHCP II decreased in paraquat treated sensitive thylakoids, which was in correlation with the reduction o f A3-transhexadecanoic acid content. Decrease in oligom eric LHCP II and/or special lipids (PG) in sensitive thylakoids may change the association o f LHCP II and photosystem II core as it is evidenced from lowering o f the M g2+ induced changes o f the short wavelength fluorescence intensity and increase in the relative quantum requirement values. The results are discussed in connection with a possible effect o f paraquat on PS II. 
  Reference    Z. Naturforsch. 47c, 400 (1992); received January 20 1992 
  Published    1992 
  Keywords    Paraquat/Atrazine Coresistance, Conyza canadensis, Chlorophyll-Protein Complexes, C hloro­ plast Lipids, Herbicides 
  Similar Items    Find
 TEI-XML for    default:Reihe_C/47/ZNC-1992-47c-0400.pdf 
 Identifier    ZNC-1992-47c-0400 
 Volume    47