Results 41 to 50 of about 51,482 (311)

A minimal mathematical model of nonphotochemical quenching of chlorophyll fluorescence [PDF]

, 2010
Copyright © 2010 Elsevier Ireland Ltd.
Ebenhöh, Oliver, Houwaart, Torsten, Lokstein, Heiko, Schlede, Stephanie, Tirok, Katrin   +4 more
core   +1 more source

Low-Temperature Adaptation of the Snow Alga Chlamydomonas nivalis Is Associated With the Photosynthetic System Regulatory Process

Frontiers in Microbiology, 2020
The alga Chlamydomonas nivalis thrives in polar snow fields and on high-altitude mountain tops, and contributes significantly on primary production in the polar regions, however, the mechanisms underlying this adaptation to low temperatures are unknown ...
Yanli Zheng, Yanli Zheng, Chunling Xue, Chunling Xue, Hui Chen, Hui Chen, Chenliu He, Qiang Wang, Qiang Wang   +8 more
doaj   +1 more source

The Adaptive Role of Carotenoids and Anthocyanins in Solanum lycopersicum Pigment Mutants under High Irradiance

Cells, 2023
The effects of high-intensity light on the pigment content, photosynthetic rate, and fluorescence parameters of photosystem II in high-pigment tomato mutants (hp 3005) and low-pigment mutants (lp 3617) were investigated. This study also evaluated the dry
Aleksandr Ashikhmin, Maksim Bolshakov, Pavel Pashkovskiy, Mikhail Vereshchagin, Alexandra Khudyakova, Galina Shirshikova, Anna Kozhevnikova, Anatoliy Kosobryukhov, Vladimir Kreslavski, Vladimir Kuznetsov, Suleyman I. Allakhverdiev   +10 more
doaj   +1 more source

Alterations in Carboxylate Ligation at the Active Site of Photosystem II [PDF]

Journal of Biological Chemistry, 1999
Photosystem II (PSII) is the photosynthetic enzyme catalyzing the oxidation of water and reduction of plastoquinone (Q). This reaction occurs at a catalytic site containing four manganese atoms and cycling among five oxidation states, the Sn states, where n refers to the number of oxidizing equivalents stored.
J J, Steenhuis, R S, Hutchison, B A, Barry   +2 more
openaire   +2 more sources

Activity of photosystem II in spring barley leaves under the action of manganese ions

Аграрная наука Евро-Северо-Востока, 2023
The influence of manganese ions (30, 60 and 90 mg/l) on the functioning of the photosystem II (PSII) in leaves was assessed on plants of six spring barley cultivars (Belgorodsky 100, st.). The plants were grown on a complete Knop medium without (control)
E. M. Lisitsyn, S. A. Churakova
doaj   +1 more source

Carbonic Anhydrase Activity of the Photosystem II OEC33 Protein from Pea [PDF]

Plant and Cell Physiology, 2005
The purpose of this study was to identify the location of one of the two sources of carbonic anhydrase (CA) activity associated with the PSII complex in chloroplast membranes. We tested the hypothesis that the extrinsic 33 kDa protein, OEC33, associated with the oxygen-evolving complex (OEC), is one source of CA activity.
Yih-Kuang, Lu, Steven M, Theg, Alan J, Stemler   +2 more
openaire   +2 more sources

Seasonal changes in photosynthesis for the epiphytic bromeliad Tillandsia brachycaulos in a tropical dry deciduous forest

Botan‪ical Sciences, 2021
Background: Sunlight stress and drought affect plants by inducing various biochemical and physiological responses, which reduce growth. Seasonal changes in light and water availability that occur in forest canopies, where epiphytes occur, are extreme.
Claudia González-Salvatierra , Luis Manuel Peña-Rodríguez , Casandra Reyes-García, Erick de la Barrera, José Luis Andrade   +4 more
doaj   +1 more source

Models and measurements of energy-dependent quenching. [PDF]

, 2013
Energy-dependent quenching (qE) in photosystem II (PSII) is a pH-dependent response that enables plants to regulate light harvesting in response to rapid fluctuations in light intensity.
Amarnath, Kapil, FLEMING, Graham R, Sylak-Glassman, Emily, Zaks, Julia   +3 more
core   +1 more source

Carbon Contacts to Proteins Enable Robust, Biocompatible Electronic Junctions with Near‐Activation‐less Conduction Down to 10 K

Advanced Functional Materials, EarlyView.
A robust solid‐state protein junction with a semi‐transparent eC/Au electrode allows photoexcitation of the bacterio‐rhodopsin, bR layer, to isomerize the bR retinal. The resulting photo‐response shows the protein is functional in the solid‐state junction.
Shailendra K. Saxena, Sudipta Bera, Tatyana Bendikov, Israel Pecht, Mordechai Sheves, David Cahen   +5 more
wiley   +1 more source

Oxygen Supply of Islets of Langerhans by Photosynthetically Active Microalgae in Bioprinted Co‐Cultures Maintains Their Function in a Hypoxic Environment

Advanced Healthcare Materials, EarlyView.
This study developed a bioprinted co‐culture system embedding rat pancreatic islets and Scenedesmus sp. microalgae spatially defined in close vicinity. Red light was found optimal to ensure microalgal photosynthesis while maintaining islet viability and functionality. A tailored co‐culture medium supported both cell types.
Finn Dani, Sarah Duin, Ashwini Rahul Akkineni, Susann Lehmann, Barbara Ludwig, Michael Kühl, Michael Gelinsky, Anja Lode   +7 more
wiley   +1 more source