Results 11 to 20 of about 2,591 (159)

Photosynthetic Parameters Show Specific Responses to Essential Mineral Deficiencies

Antioxidants, 2021
In response to decreases in the assimilation efficiency of CO2, plants oxidize the reaction center chlorophyll (P700) of photosystem I (PSI) to suppress reactive oxygen species (ROS) production.
Miho Ohnishi, Riu Furutani, Takayuki Sohtome, Takeshi Suzuki, Shinya Wada, Soma Tanaka, Kentaro Ifuku, Daisei Ueno, Chikahiro Miyake   +8 more
doaj   +1 more source

Special issue in honour of Prof. Reto J. Strasser - Effect of AtLFNR1 deficiency on chlorophyll a fluorescence rise kinetics OJIP of Arabidopsis

Photosynthetica, 2020
Leaf-type ferredoxin-NADP(H) oxidoreductase, encoded by AtLFNR1 gene in Arabidopsis, extensively exists in chloroplast stroma and thylakoids and is responsible for the reduction of NADP+ to NADPH in PSI.
Y. GUO, Y. ZHANG, Y. LU, J. SHI, S. CHEN, R.J. STRASSER, S. QIANG, Z. HU   +7 more
doaj   +1 more source

FTIR Difference Spectroscopy in Combination with Isotope Labeling for Identification of the Carbonyl Modes of P700 and P700+ in Photosystem I [PDF]

Biophysical Journal, 2004
Room temperature, light induced (P700(+)-P700) Fourier transform infrared (FTIR) difference spectra have been obtained using photosystem I (PS I) particles from Synechocystis sp. PCC 6803 that are unlabeled, uniformly (2)H labeled, and uniformly (15)N labeled.
Wang, Ruili, Sivakumar, Velautham, Wade Johnson, T., Hastings, Gary   +3 more
openaire   +2 more sources

Identification of a Novel Mutation Exacerbated the PSI Photoinhibition in pgr5/pgrl1 Mutants; Caution for Overestimation of the Phenotypes in Arabidopsis pgr5-1 Mutant

Cells, 2021
PSI photoinhibition is usually avoided through P700 oxidation. Without this protective mechanism, excess light represents a potentially lethal threat to plants.
Shinya Wada, Katsumi Amako, Chikahiro Miyake   +2 more
doaj   +1 more source

Identification of Twelve Different Mineral Deficiencies in Hydroponically Grown Sunflower Plants on the Basis of Short Measurements of the Fluorescence and P700 Oxidation/Reduction Kinetics

Frontiers in Plant Science, 2022
The photosynthetic electron transport chain is mineral rich. Specific mineral deficiencies can modify the electron transport chain specifically. Here, it is shown that on the basis of 2 short Chl fluorescence and P700+ measurements (approx. 1 s each), it
Gert Schansker, Miho Ohnishi, Riu Furutani, Chikahiro Miyake   +3 more
doaj   +1 more source

Different Strategies for Photosynthetic Regulation under Fluctuating Light in Two Sympatric Paphiopedilum Species

Cells, 2021
Fluctuating light can cause selective photoinhibition of photosystem I (PSI) in angiosperms. Cyclic electron flow (CEF) around PSI and electron flux from water via the electron transport chain to oxygen (the water-water cycle) play important roles in ...
Jing-Qiu Feng, Wei Huang, Ji-Hua Wang, Shi-Bao Zhang   +3 more
doaj   +1 more source

Photorespiration Enhances Acidification of the Thylakoid Lumen, Reduces the Plastoquinone Pool, and Contributes to the Oxidation of P700 at a Lower Partial Pressure of CO₂ in Wheat Leaves

Plants, 2020
The oxidation of P700 in photosystem I (PSI) is a robust mechanism that suppresses the production of reactive oxygen species. We researched the contribution of photorespiration to the oxidation of P700 in wheat leaves.
Shinya Wada, Yuji Suzuki, Chikahiro Miyake   +2 more
doaj   +1 more source

Molecular analysis of virulent determinants of enterovirus 71. [PDF]

PLoS ONE, 2011
Enterovirus 71 (EV71) is the most important causative agent of hand, foot and mouth disease (HFMD) in children. In most cases, it is a self-limiting illness.
Renqing Li, Qinghua Zou, Lijuan Chen, Herun Zhang, Yumei Wang   +4 more
doaj   +1 more source

Reduction-Induced Suppression of Electron Flow (RISE) Is Relieved by Non-ATP-Consuming Electron Flow in Synechococcus elongatus PCC 7942

Frontiers in Microbiology, 2018
Photosynthetic organisms oxidize P700 to suppress the production of reactive oxygen species (ROS) in photosystem I (PSI) in response to the lower efficiency of photosynthesis under high light and low CO2 conditions.
Ginga Shimakawa, Keiichiro Shaku, Chikahiro Miyake, Chikahiro Miyake   +3 more
doaj   +1 more source

The evolutionary conserved iron-sulfur protein TCR controls P700 oxidation in photosystem I

iScience, 2021
Summary: In natural habitats, plants have developed sophisticated regulatory mechanisms to optimize the photosynthetic electron transfer rate at the maximum efficiency and cope with the changing environments.
Mai Duy Luu Trinh, Daichi Miyazaki, Sumire Ono, Jiro Nomata, Masaru Kono, Hiroyuki Mino, Tatsuya Niwa, Yuki Okegawa, Ken Motohashi, Hideki Taguchi, Toru Hisabori, Shinji Masuda   +11 more
doaj   +1 more source