Simultaneous photocalorimetric and oxygen polarographic measurements on Dunaliella maritima cells reveal a thermal discrepancy that could be due to nonphotochemical quenching

2006 ◽  
Vol 446 (1-2) ◽  
pp. 11-19 ◽  
Author(s):  
V.S. Mukhanov ◽  
R.B. Kemp
Keyword(s):  
Nonphotochemical Quenching ◽  
Dunaliella Maritima

Variation among slash pine families in chlorophyll fluorescence traits

2003 ◽  
Vol 33 (6) ◽  
pp. 1102-1109 ◽  
Author(s):  
Anita C Koehn ◽  
James H Roberds ◽  
Robert L Doudrick
Keyword(s):  
Photosystem Ii ◽  
Growth Traits ◽  
Pinus Elliottii ◽  
Nonphotochemical Quenching ◽  
Slash Pine ◽  
Photochemical Quenching ◽  
Full Sibling ◽  
Pretreatment Effects ◽  
Pattern Of Variation ◽  
Variance Profile

Photochemical quenching, nonphotochemical quenching, and yield of photosystem II were measured on seedlings of full-sibling, open-, and self-pollinated slash pine (Pinus elliottii Engelm. var. elliottii) families. Our results reveal that genetic variation in photochemical quenching and yield of photosystem II exists within this species. The pattern of variation found in these traits is consistent with the variance profile expected to occur as a result of segregation among nuclear genes. Variation among families accounted for 17% of the total variation observed in photochemical quenching, whereas the component for trees within families made up slightly more than 25% of the total. Less variation, both among families as well as among trees within families, was found for yield of photosystem II. A strikingly different pattern was observed for nonphotochemical quenching. Other than the error term, only pretreatment effects contributed significantly to the variation observed. This suggests that nonphotochemical quenching is largely influenced by environmental factors. With regard to associations between fluorescence and growth traits, both height and diameter growth were found to be positively correlated with photochemical quenching (0.36 and 0.33, respectively) when selfed and open-pollinated families were analyzed along with control-pollinated families.

scholarly journals Dissecting and modeling zeaxanthin- and lutein-dependent nonphotochemical quenching in Arabidopsis thaliana

2017 ◽  
Vol 114 (33) ◽  
pp. E7009-E7017 ◽  
Author(s):  
Michelle Leuenberger ◽  
Jonathan M. Morris ◽  
Arnold M. Chan ◽  
Lauriebeth Leonelli ◽  
Krishna K. Niyogi ◽  
...  
Keyword(s):  
Arabidopsis Thaliana ◽  
Light Intensity ◽  
Vascular Plants ◽  
Single Photon ◽  
Photon Counting ◽  
Nonphotochemical Quenching ◽  
Light Acclimation ◽  
Single Photon Counting ◽  
Photosynthetic Organisms ◽  
Psbs Protein

Photosynthetic organisms use various photoprotective mechanisms to dissipate excess photoexcitation as heat in a process called nonphotochemical quenching (NPQ). Regulation of NPQ allows for a rapid response to changes in light intensity and in vascular plants, is primarily triggered by a pH gradient across the thylakoid membrane (∆pH). The response is mediated by the PsbS protein and various xanthophylls. Time-correlated single-photon counting (TCSPC) measurements were performed on Arabidopsis thaliana to quantify the dependence of the response of NPQ to changes in light intensity on the presence and accumulation of zeaxanthin and lutein. Measurements were performed on WT and mutant plants deficient in one or both of the xanthophylls as well as a transgenic line that accumulates lutein via an engineered lutein epoxide cycle. Changes in the response of NPQ to light acclimation in WT and mutant plants were observed between two successive light acclimation cycles, suggesting that the character of the rapid and reversible response of NPQ in fully dark-acclimated plants is substantially different from in conditions plants are likely to experience caused by changes in light intensity during daylight. Mathematical models of the response of zeaxanthin- and lutein-dependent reversible NPQ were constructed that accurately describe the observed differences between the light acclimation periods. Finally, the WT response of NPQ was reconstructed from isolated components present in mutant plants with a single common scaling factor, which enabled deconvolution of the relative contributions of zeaxanthin- and lutein-dependent NPQ.

scholarly journals Molecular Mechanisms of Nonphotochemical Quenching in the LHCSR3 Protein of Chlamydomonas reinhardtii

2019 ◽  
Vol 10 (10) ◽  
pp. 2500-2505 ◽  
Author(s):  
Gabriel de la Cruz Valbuena ◽  
Franco V. A. Camargo ◽  
Rocio Borrego-Varillas ◽  
Federico Perozeni ◽  
Cosimo D’Andrea ◽  
...  
Keyword(s):  
Chlamydomonas Reinhardtii ◽  
Molecular Mechanisms ◽  
Nonphotochemical Quenching

Toward an Understanding of the Mechanism of Nonphotochemical Quenching in Green Plants†

Biochemistry ◽  
2004 ◽  
Vol 43 (26) ◽  
pp. 8281-8289 ◽  
Author(s):  
Nancy E. Holt ◽  
Graham R. Fleming ◽  
Krishna K. Niyogi
Keyword(s):  
Nonphotochemical Quenching ◽  
Green Plants

scholarly journals A minimal mathematical model of nonphotochemical quenching of chlorophyll fluorescence

Biosystems ◽  
2011 ◽  
Vol 103 (2) ◽  
pp. 196-204 ◽  
Author(s):  
Oliver Ebenhöh ◽  
Torsten Houwaart ◽  
Heiko Lokstein ◽  
Stephanie Schlede ◽  
Katrin Tirok
Keyword(s):  
Mathematical Model ◽  
Chlorophyll Fluorescence ◽  
Nonphotochemical Quenching
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