Linking the xanthophyll cycle with thermal energy dissipation

2006 ◽  
pp. 923-930 ◽  
Author(s):  
Barbara Demmig-Adams
Keyword(s):  
Energy Dissipation ◽  
Thermal Energy ◽  
Xanthophyll Cycle ◽  
Thermal Energy Dissipation

Effects of lincomycin on PSII efficiency, non-photochemical quenching, D1 protein and xanthophyll cycle during photoinhibition and recovery

2004 ◽  
Vol 31 (8) ◽  
pp. 803 ◽  
Author(s):  
Kristine Mueh Bachmann ◽  
Volker Ebbert ◽  
William W. Adams III ◽  
Amy S. Verhoeven ◽  
Barry A. Logan ◽  
...  
Keyword(s):  
Energy Dissipation ◽  
Thermal Energy ◽  
Xanthophyll Cycle ◽  
D1 Protein ◽  
Light Treatment ◽  
High Light ◽  
Low Light ◽  
Psii Efficiency ◽  
High Light Treatment ◽  
Thermal Energy Dissipation

Leaves of Parthenocissus quinquefolia (L.) Planch. (Virginia creeper) were treated with lincomycin (an inhibitor of chloroplast-encoded protein synthesis), subjected to a high-light treatment and allowed to recover in low light. While lincomycin-treated leaves had similar characteristics as controls after a 1 h exposure to high light, total D1 levels in lincomycin-treated leaves were half those in controls at the end of the recovery period. In addition, lincomycin delayed recovery of maximal PSII efficiency of open centers (ratio of variable to maximal chlorophyll fluorescence, F v / F m) and of estimated PSII photochemistry rate upon return to low light subsequent to the high-light treatment. Furthermore, lincomycin treatment slowed the removal of zeaxanthin (Z) and antheraxanthin (A) during recovery in low light, and the level of thermal energy dissipation (non-photochemical fluorescence quenching, NPQ) remained elevated. In lincomycin-treated leaves infiltrated with the uncoupler nigericin immediately after high-light exposure, thermal energy dissipation, sustained with lincomycin alone, declined quickly to control levels. In summary, lincomycin treatment affected not only D1 protein turnover but also xanthophyll-cycle operation and thermal-energy dissipation. The latter effect was apparently a result of the maintenance of a high trans-thylakoid proton gradient. Similar effects were also seen subsequent to short-term exposures to high light in lincomycin-treated Spinacia oleracea L. (spinach) leaves. In contrast, lincomycin treatments under low-light levels did not induce Z formation or NPQ. These results suggest that lincomycin has the potential to lower PSII efficiency (F v / F m) through inhibition of NPQ relaxation and Z + A removal subsequent to high-light exposures.

Thermal-Energy Dissipation

1982 ◽  
Vol 70 (4) ◽  
pp. 475-480 ◽  
Author(s):  
Kenneth H. Cohn ◽  
James W. May
Keyword(s):  
Energy Dissipation ◽  
Thermal Energy ◽  
Thermal Energy Dissipation

Thermal Energy Dissipation by SiO2-Coated Plasmonic-Superparamagnetic Nanoparticles in Alternating Magnetic Fields

2013 ◽  
Vol 25 (22) ◽  
pp. 4603-4612 ◽  
Author(s):  
Georgios A. Sotiriou ◽  
Michelle A. Visbal-Onufrak ◽  
Alexandra Teleki ◽  
Eduardo J. Juan ◽  
Ann M. Hirt ◽  
...  
Keyword(s):  
Energy Dissipation ◽  
Magnetic Fields ◽  
Thermal Energy ◽  
Superparamagnetic Nanoparticles ◽  
Thermal Energy Dissipation ◽  
Alternating Magnetic Fields

Wide variation of winter-induced sustained thermal energy dissipation in conifers: a common-garden study

Oecologia ◽  
2021 ◽  
Author(s):  
A. Walter-McNeill ◽  
M. A. Garcia ◽  
B. A. Logan ◽  
D. M. Bombard ◽  
J. S. Reblin ◽  
...  
Keyword(s):  
Energy Dissipation ◽  
Thermal Energy ◽  
Common Garden ◽  
Thermal Energy Dissipation
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