Results 31 to 40 of about 30,075 (258)

Non-intrusive Assessment of Photosystem II and Photosystem I in Whole Coral Tissues

Frontiers in Marine Science, 2017
Reef building corals (phylum Cnidaria) harbor endosymbiotic dinoflagellate algae (genus Symbiodinium) that generate photosynthetic products to fuel their host's metabolism.
Milán Szabó, Milán Szabó, Anthony W. D. Larkum, David J. Suggett, Imre Vass, László Sass, Barry Osmond, Barry Osmond, Alonso Zavafer, Peter J. Ralph, Wah S. Chow   +10 more
doaj   +1 more source

Cryo-EM and femtosecond spectroscopic studies provide mechanistic insight into the energy transfer in CpcL-phycobilisomes

Nature Communications, 2023
Phycobilisomes (PBS) are the major light harvesting complexes of photosynthesis in the cyanobacteria and red algae. CpcL-PBS is a type of small PBS in cyanobacteria that transfers energy directly to photosystem I without the core structure.
Lvqin Zheng, Zhengdong Zhang, Hongrui Wang, Zhenggao Zheng, Jiayu Wang, Heyuan Liu, Hailong Chen, Chunxia Dong, Guopeng Wang, Yuxiang Weng, Ning Gao, Jindong Zhao   +11 more
doaj   +1 more source

Structure Insights Into Photosystem I Octamer From Cyanobacteria

Frontiers in Microbiology, 2022
The diversity of photosystem oligomers is essential to understanding how photosynthetic organisms adapt to light conditions. Due to its structural and physiological significance, the assembly of the PSI supercomplex has been of great interest recently in
Ming Chen, Yujie He, Dongyang Liu, Lijin Tian, Pengqi Xu, Xuan Liu, Yihang Pan, Shuqi Dong, Shuqi Dong, Jun He, Jun He, Ying Zhang   +11 more
doaj   +1 more source

Reconstructing the origin of oxygenic photosynthesis: do assembly and photoactivation recapitulate evolution?

Frontiers in Plant Science, 2016
Due to the great abundance of genomes and protein structures that today span a broad diversity of organisms, now more than ever before, it is possible to reconstruct the molecular evolution of protein complexes at an incredible level of detail.
Tanai eCardona
doaj   +1 more source

Chlorophyll Proteins of Photosystem I [PDF]

Plant Physiology, 1980
Data are presented which suggest the existence of a light-harvesting pigment-protein complex which is functionally and structurally associated with photosystem I (PSI) reaction centers. These observations are based on techniques which allow isolation of PSI using minimal concentrations of Triton X-100. Properties of density and self aggregation allowed
J E, Mullet, J J, Burke, C J, Arntzen
openaire   +2 more sources

Blue light is more essential than red light for maintaining the activities of photosystem II and I and photosynthetic electron transport capacity in cucumber leaves

Journal of Integrative Agriculture, 2016
Blue and red lights differently regulate leaf photosynthesis. Previous studies indicated that plants under blue light generally exhibit better photosynthetic characteristics than those under red light.
Yan-xiu MIAO, Xiao-zhuo WANG, Li-hong GAO, Qing-yun CHEN, Mei QU   +4 more
doaj   +1 more source

New Water Oxidation Mechanism in Photosystem II Resolves Major Experimental Controversies

Angewandte Chemie, EarlyView.
In Photosystem II Oxygen Evolving Complex, we discovered the O3‐O6 peroxide at lower energy. Assignment of the O3 ligated by histidine (His337) as a slow exchanging substrate and its coupling with O6 give the O─O bond formation mechanism most consistent with all currently available experimental data. Proposal shows how protein environment can steer the
Yulia Pushkar
wiley   +2 more sources

Wheat truncated hemoglobin interacts with photosystem I PSK-I subunit and photosystem II subunit PsbS1

Biologia Plantarum, 2013
Recently, the truncated hemoglobin gene (trHb) was discovered in plant species, however, its role has not yet been determined. In this study, the gene expression of wheat trHb (TatrHb) was analyzed under various biotic and abiotic stresses.
D. Y. Kim, M. J. Hong, Y. J. Lee, M. B. Lee, Y. W. Seo   +4 more
doaj   +1 more source

Water, Alcohols, Amines, and Amides as Formal Hydrogen‐Atom‐Transfer Reagents Through Activation With Redox‐Active Lewis Acids

Angewandte Chemie, EarlyView.
Protic molecules containing strong O─H or N─H bonds typically resist hydrogen‐atom abstraction because of the high reactivity of the resulting heteroatom‐centered radicals. However, association of the protic molecules with redox‐active Lewis acids can provide powerful hydrogen‐atom donors or proton‐coupled‐electron‐transfer reagents.
Petra Vojáčková, Armido Studer
wiley   +2 more sources

Early Archean origin of heterodimeric Photosystem I

Heliyon, 2018
When and how oxygenic photosynthesis originated remains controversial. Wide uncertainties exist for the earliest detection of biogenic oxygen in the geochemical record or the origin of water oxidation in ancestral lineages of the phylum Cyanobacteria.
Tanai Cardona
doaj   +1 more source