Impact of UV-B radiation on the photosystem II activity, pro-/antioxidant balance and expression of light-activated genes in Arabidopsis thaliana hy4 mutants grown under light of different spectral composition

2019 ◽  
Vol 194 ◽  
pp. 14-20 ◽  
Author(s):  
Aleksandra Yu Khudyakova ◽  
Vladimir D. Kreslavski ◽  
Aleksandr N. Shmarev ◽  
Valery Yu Lyubimov ◽  
Galina N. Shirshikova ◽  
...  
Keyword(s):  
Arabidopsis Thaliana ◽  
Photosystem Ii ◽  
Spectral Composition ◽  
Photosystem Ii Activity

The PsbJ protein is required for photosystem II activity in centers lacking the PsbO and PsbV lumenal subunits

2021 ◽  
Author(s):  
Priscilla Choo ◽  
Jack A. Forsman ◽  
Liangliang Hui ◽  
Ei Phyo Khaing ◽  
Tina C. Summerfield ◽  
...  
Keyword(s):  
Photosystem Ii ◽  
Photosystem Ii Activity

scholarly journals The Role of Selected Wavelengths of Light in the Activity of Photosystem II in Gloeobacter violaceus

2021 ◽  
Vol 22 (8) ◽  
pp. 4021
Author(s):  
Monika Kula-Maximenko ◽  
Kamil Jan Zieliński ◽  
Ireneusz Ślesak
Keyword(s):  
Photosystem Ii ◽  
Spectral Composition ◽  
Photosynthetic Electron Transport ◽  
Metabolic Energy ◽  
Light Conditions ◽  
Gloeobacter Violaceus ◽  
Transport Chain ◽  
Cyanobacterial Culture ◽  
Photosynthetic Antennas

Gloeobacter violaceus is a cyanobacteria species with a lack of thylakoids, while photosynthetic antennas, i.e., phycobilisomes (PBSs), photosystem II (PSII), and I (PSI), are located in the cytoplasmic membrane. We verified the hypothesis that blue–red (BR) light supplemented with a far-red (FR), ultraviolet A (UVA), and green (G) light can affect the photosynthetic electron transport chain in PSII and explain the differences in the growth of the G. violaceus culture. The cyanobacteria were cultured under different light conditions. The largest increase in G. violaceus biomass was observed only under BR + FR and BR + G light. Moreover, the shape of the G. violaceus cells was modified by the spectrum with the addition of G light. Furthermore, it was found that both the spectral composition of light and age of the cyanobacterial culture affect the different content of phycobiliproteins in the photosynthetic antennas (PBS). Most likely, in cells grown under light conditions with the addition of FR and G light, the average antenna size increased due to the inactivation of some reaction centers in PSII. Moreover, the role of PSI and gloeorhodopsin as supplementary sources of metabolic energy in the G. violaceus growth is discussed.

Inhibitions of photosystem II activity by proton gradient

1994 ◽  
Vol 1185 (3) ◽  
pp. 279-283 ◽  
Author(s):  
Alexander M. Ehrenheim ◽  
Giovanni Finazzi ◽  
Giorgio Forti
Keyword(s):  
Photosystem Ii ◽  
Proton Gradient ◽  
Photosystem Ii Activity

Changes in Photosystem II Activity and Leaf Reflectance Features of Several Subtropical Woody Plants Under Simulated SO2Treatment

2006 ◽  
Vol 48 (11) ◽  
pp. 1274-1286 ◽  
Author(s):  
Nan Liu ◽  
Chang-Lian Peng ◽  
Zhi-Fang Lin ◽  
Gui-Zhu Lin ◽  
Ling-Ling Zhang ◽  
...  
Keyword(s):  
Photosystem Ii ◽  
Woody Plants ◽  
Leaf Reflectance ◽  
Photosystem Ii Activity

scholarly journals Expression and pH-dependence of the Photosystem II Subunit S from Arabidopsis thaliana

2010 ◽  
Vol 31 (6) ◽  
pp. 1479-1484 ◽  
Author(s):  
Mi-Suk Jeong ◽  
Eun-Young Hwang ◽  
Gyoung-Ean Jin ◽  
So-Young Park ◽  
Ismayil S. Zulfugarov ◽  
...  
Keyword(s):  
Arabidopsis Thaliana ◽  
Photosystem Ii ◽  
Ph Dependence

scholarly journals Appreciation of tolerance at the impact of thermal stress on photosystem ii activity in the leaves of pedunculate oak (Quercus robur L.) trees of different ecological origin

2021 ◽  
Vol 13 (1(22)) ◽  
pp. 13-20
Author(s):  
Petru Cuza ◽  
Keyword(s):  
Thermal Stress ◽  
Photosystem Ii ◽  
Quercus Robur ◽  
Central Area ◽  
Extreme Weather Events ◽  
Pedunculate Oak ◽  
Adaptation Capacity ◽  
Oak Trees ◽  
Photosystem Ii Activity ◽  
The Impact

Extreme weather events with high temperatures and strong sunlight have increased alarmingly in the last few decades, considerable affecting plant photosynthesis. In this study, the impact of thermal stress on photosystem II activity in the leaves of pedunculate oak trees (Quercus robur L.) of different ecological origin was assessed. Four days after the thermal shock application with a temperature of 50°C during 20, 40, 60 minutes, the processes of recovery on photosystem II activity in the leaves of the oak trees in the investigated provenances took place with different speed and fullness. The recovery of the functional state of photosystem II in the leaves of the trees showed that in the environmental conditions of the ,,Plaiul Fagului” reservation territory an advanced thermotolerance to the thermal stress action was specifi c for the origin from the north of the country (Edinet). The leaves of the trees of local and southern origin showed a low resistance to the thermal stress action. The advanced adaptation capacity, the high growth rate of the trees from the northern provenance suggest that the acorn harvested from the oaks of northern origin can be used for the works of extension of the afforestation areas in the central area of the Republic of Moldova.

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