scholarly journals Light-Induced Biogenesis of Light-Harvesting Complex I (LHC I) during Chloroplast Development in Barley (Hordeum vulgare) (Studies Using cDNA Clones of the 21- and 20-Kilodalton LHC I Apoproteins)

1993 ◽  
Vol 101 (1) ◽  
pp. 227-236 ◽  
Author(s):  
S. Anandan ◽  
D. T. Morishige ◽  
J. P. Thornber
Keyword(s):  
Hordeum Vulgare ◽  
Complex I ◽  
Chloroplast Development ◽  
Light Harvesting ◽  
Cdna Clones ◽  
Light Harvesting Complex ◽  
Lhc I

Structure of plant photosystem I‐light harvesting complex I supercomplex at 2.4 Å resolution

2021 ◽  
Author(s):  
Jie Wang ◽  
Long‐Jiang Yu ◽  
Wenda Wang ◽  
Qiujing Yan ◽  
Tingyun Kuang ◽  
...  
Keyword(s):  
Photosystem I ◽  
Complex I ◽  
Light Harvesting ◽  
Light Harvesting Complex

Structure of the maize photosystem I supercomplex with light-harvesting complexes I and II

Science ◽  
2018 ◽  
Vol 360 (6393) ◽  
pp. 1109-1113 ◽  
Author(s):  
Xiaowei Pan ◽  
Jun Ma ◽  
Xiaodong Su ◽  
Peng Cao ◽  
Wenrui Chang ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Energy Transfer ◽  
Complex I ◽  
Light Harvesting ◽  
Light Conditions ◽  
Light Harvesting Complexes ◽  
Light Harvesting Complex ◽  
Cryo Electron Microscopy ◽  
Photosystems I And Ii ◽  
Light Harvesting Complex Ii

Plants regulate photosynthetic light harvesting to maintain balanced energy flux into photosystems I and II (PSI and PSII). Under light conditions favoring PSII excitation, the PSII antenna, light-harvesting complex II (LHCII), is phosphorylated and forms a supercomplex with PSI core and the PSI antenna, light-harvesting complex I (LHCI). Both LHCI and LHCII then transfer excitation energy to the PSI core. We report the structure of maize PSI-LHCI-LHCII solved by cryo–electron microscopy, revealing the recognition site between LHCII and PSI. The PSI subunits PsaN and PsaO are observed at the PSI-LHCI interface and the PSI-LHCII interface, respectively. Each subunit relays excitation to PSI core through a pair of chlorophyll molecules, thus revealing previously unseen paths for energy transfer between the antennas and the PSI core.

The Variation of the Electrochromic Difference Spectrum at Various Stages of the Chloroplast Development

1979 ◽  
Vol 34 (1-2) ◽  
pp. 120-123 ◽  
Author(s):  
G. Renger ◽  
D. Difiore ◽  
B. Luuring ◽  
P. Gräber
Keyword(s):  
Electron Transport ◽  
Chloroplast Development ◽  
Light Harvesting ◽  
Difference Spectrum ◽  
Chlorophyll B ◽  
Light Harvesting Complex ◽  
Intermittent Illumination ◽  
Electrochromic Bandshift

Abstract The flash-induced difference spectrum in the range of 450 - 550 nm of protochloroplasts isolated from pea-leaves greened under intermittent illumination (2 min light, 98 min dark) was measured and compared with that of fully developed chloroplasts from pea leaves. Because of the sensitivity of the decay o fthe absorption changes to the ionophore valinomycin they were shown to mainly be due to an electrochromic bandshift of the membrane pigments (chlorophylls-a, -b and carotenoids). The differences in the shape and the amplitude between both spectra are consistently explained within the framework of a recent hypothesis supposed by Sewe and Reich (Z. Naturforsch. 33 c, 161 - 171 (1978)) by the lack of chlorophyll-b in the protochloroplasts. It is concluded, that the transformation of the protochloroplasts into chloroplasts which is accompanied by the incorporation of the light harvesting complex and the formation of grana stacks does not seriously change the orientation of the field indicating pigments within the membrane with respect of the polarity of the light induced vectorial electron transport.

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