Occurrence of the carotenoid lactucaxanthin in higher plant LHC II

1995 ◽  
Vol 43 (3) ◽  
pp. 273-282 ◽  
Author(s):  
Denise Phillip ◽  
Andrew J. Young
Keyword(s):  
Higher Plant ◽  
Lhc Ii

Assignment of Spectral Substructures to Pigment-Binding Sites in Higher Plant Light-Harvesting Complex LHC-II†

Biochemistry ◽  
2002 ◽  
Vol 41 (7) ◽  
pp. 2281-2287 ◽  
Author(s):  
Hans Rogl ◽  
Rene Schödel ◽  
Heiko Lokstein ◽  
Werner Kühlbrandt ◽  
Axel Schubert
Keyword(s):  
Binding Sites ◽  
Light Harvesting ◽  
Higher Plant ◽  
Lhc Ii ◽  
Light Harvesting Complex

High-Resolution electron crystallography of the light-harvesting chlorophyll-a/b protein complex from chloroplast membranes

1990 ◽  
Vol 48 (1) ◽  
pp. 610-610
Author(s):  
Werner Kühlbrandt ◽  
Da Neng Wang ◽  
K.H. Downing
Keyword(s):  
High Resolution ◽  
Electron Diffraction ◽  
Chlorophyll A ◽  
Protein Complex ◽  
Structural Integrity ◽  
Light Harvesting ◽  
Lhc Ii ◽  
Diffraction Patterns ◽  
Difference Fourier ◽  
2D Crystals

The light-harvesting chlorophyll-a/b protein complex (LHC-II) is the most abundant membrane protein in the chloroplasts of green plants where it functions as a molecular antenna of solar energy for photosynthesis. We have grown two-dimensional (2d) crystals of the purified, detergent-solubilized LHC-II . The crystals which measured 5 to 10 μm in diameter were stabilized for electron microscopy by washing with a 0.5% solution of tannin. Electron diffraction patterns of untilted 2d crystals cooled to 130 K showed sharp spots to 3.1 Å resolution. Spot-scan images of 2d crystals were recorded at 160 K with the Berkeley microscope . Images of untilted crystals were processed, using the unbending procedure by Henderson et al . A projection map of the complex at 3.7Å resolution was generated from electron diffraction amplitudes and high-resolution phases obtained by image processing .A difference Fourier analysis with the same image phases and electron diffraction amplitudes recorded of frozen, hydrated specimens showed no significant differences in the 3.7Å projection map. Our tannin treatment therefore does not affect the structural integrity of the complex.

Characterization of an iron-containing superoxide dismutase from a higher plant, Citrus limonum

1994 ◽  
Vol 90 (2) ◽  
pp. 339-347 ◽  
Author(s):  
Maria S. Almansa ◽  
Luis A. del Rio ◽  
Francisca Sevilla
Keyword(s):  
Superoxide Dismutase ◽  
Higher Plant ◽  
Citrus Limonum

scholarly journals Antisense Inhibition of the PsbX Protein Affects PSII Integrity in the Higher Plant Arabidopsis thaliana

2008 ◽  
Vol 50 (2) ◽  
pp. 191-202 ◽  
Author(s):  
José G. García-Cerdán ◽  
Dmitry Sveshnikov ◽  
David Dewez ◽  
Stefan Jansson ◽  
Christiane Funk ◽  
...  
Keyword(s):  
Arabidopsis Thaliana ◽  
Antisense Inhibition ◽  
Higher Plant ◽  
Plant Arabidopsis Thaliana

scholarly journals Comparative Metabolite Profile, Biological Activity and Overall Quality of Three Lettuce (Lactuca sativa L., Asteraceae) Cultivars in Response to Sulfur Nutrition

Pharmaceutics ◽  
2021 ◽  
Vol 13 (5) ◽  
pp. 713
Author(s):  
Muna Ali Abdalla ◽  
Fengjie Li ◽  
Arlette Wenzel-Storjohann ◽  
Saad Sulieman ◽  
Deniz Tasdemir ◽  
...  
Keyword(s):  
Secondary Metabolites ◽  
Plant Growth ◽  
Sesquiterpene Lactones ◽  
Critical Role ◽  
Soluble Sugars ◽  
Radical Scavenging ◽  
Metabolite Profile ◽  
Water Soluble ◽  
Radical Scavenger ◽  
Higher Plant

The main objective of the present study was to assess the effects of sulfur (S) nutrition on plant growth, overall quality, secondary metabolites, and antibacterial and radical scavenging activities of hydroponically grown lettuce cultivars. Three lettuce cultivars, namely, Pazmanea RZ (green butterhead, V1), Hawking RZ (green multi-leaf lettuce, V2), and Barlach RZ (red multi-leaf, V3) were subjected to two S-treatments in the form of magnesium sulfate (+S) or magnesium chloride (−S). Significant differences were observed under −S treatments, especially among V1 and V2 lettuce cultivars. These responses were reflected in the yield, levels of macro- and micro-nutrients, water-soluble sugars, and free inorganic anions. In comparison with the green cultivars (V1 and V2), the red-V3 cultivar revealed a greater acclimation to S starvation, as evidenced by relative higher plant growth. In contrast, the green cultivars showed higher capabilities in production and superior quality attributes under +S condition. As for secondary metabolites, sixteen compounds (e.g., sesquiterpene lactones, caffeoyl derivatives, caffeic acid hexose, 5-caffeoylquinic acid (5-OCQA), quercetin and luteolin glucoside derivatives) were annotated in all three cultivars with the aid of HPLC-DAD-MS-based untargeted metabolomics. Sesquiterpene lactone lactucin and anthocyanin cyanidin 3-O-galactoside were only detected in V1 and V3 cultivars, respectively. Based on the analyses, the V3 cultivar was the most potent radical scavenger, while V1 and V2 cultivars exhibited antibacterial activity against Staphylococcus aureus in response to S provision. Our study emphasizes the critical role of S nutrition in plant growth, acclimation, and nutritional quality. The judicious-S application can be adopted as a promising antimicrobial prototype for medical applications.

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