scholarly journals The Xanthophyll Cycle Modulates the Kinetics of Nonphotochemical Energy Dissipation in Isolated Light-Harvesting Complexes, Intact Chloroplasts, and Leaves of Spinach

1999 ◽  
Vol 119 (2) ◽  
pp. 531-542 ◽  
Author(s):  
Alexander V. Ruban ◽  
Peter Horton
Keyword(s):  
Energy Dissipation ◽  
Xanthophyll Cycle ◽  
Light Harvesting ◽  
Light Harvesting Complexes ◽  
Intact Chloroplasts ◽  
Kinetics Of

scholarly journals 9-cis-Neoxanthin in Light Harvesting Complexes of Photosystem II Regulates the Binding of Violaxanthin and Xanthophyll Cycle

2017 ◽  
Vol 174 (1) ◽  
pp. 86-96 ◽  
Author(s):  
Ke Wang ◽  
Wenfeng Tu ◽  
Cheng Liu ◽  
Yan Rao ◽  
Zhimin Gao ◽  
...  
Keyword(s):  
Photosystem Ii ◽  
Xanthophyll Cycle ◽  
Light Harvesting ◽  
Light Harvesting Complexes

Chlorophyll and Carotenoid Composition in Leaves of Euonymus kiautschovicus Acclimated to Different Degrees of Light Stress in the Field

1996 ◽  
Vol 23 (5) ◽  
pp. 649 ◽  
Author(s):  
B Demmig-Adams ◽  
WW Iii Adams
Keyword(s):  
Energy Dissipation ◽  
Xanthophyll Cycle ◽  
Light Stress ◽  
Single Species ◽  
Thermal Dissipation ◽  
Light Collection ◽  
Light Harvesting Complexes ◽  
Carotenoid Composition ◽  
Actual Degree ◽  
Β Carotene

The response of carotenoid and chlorophyll composition to the actual degree of excess light experienced in the natural environment was examined in differently angled leaves of the sclerophyllous shrub Euonymus kiautschovicus. Increasing light stress caused a greater conversion of the xanthophyll cycle to zeaxanthin and antheraxanthin as well as thermal dissipation of a greater fraction of the absorbed light. Increasing light stress was also associated with increasing chlorophyll alb ratios and increases in the pool size of the xanthophyll cycle. The response of all other carotenoids to light stress was less pronounced than that of the xanthophyll cycle pool. While the ratio of β-carotene or lutein to chlorophyll increased with increasing light stress, the ratio of neoxanthin to chlorophyll remained constant. Only the (taxonomically restricted) carotenoids lactucaxanthin and �-carotene decreased relative to chlorophyll with increasing light stress. These findings are consistent with an increased emphasis on energy dissipation over light collection with increasing light stress, afforded presumably by a decreased ratio of major, peripheral (bulk chlorophyll-binding) to minor, proximal (xanthophyll cycle-rich) light-harvesting complexes of photosystem II. These responses to light stress within a single species could not be extrapolated to comparisons among different groups of species.

scholarly journals Photoprotective Energy Dissipation Involves the Reorganization of Photosystem II Light-Harvesting Complexes in the Grana Membranes of Spinach Chloroplasts

2011 ◽  
Vol 23 (4) ◽  
pp. 1468-1479 ◽  
Author(s):  
Matthew P. Johnson ◽  
Tomasz K. Goral ◽  
Christopher D.P. Duffy ◽  
Anthony P.R. Brain ◽  
Conrad W. Mullineaux ◽  
...  
Keyword(s):  
Energy Dissipation ◽  
Photosystem Ii ◽  
Light Harvesting ◽  
Light Harvesting Complexes ◽  
Spinach Chloroplasts
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