Results 31 to 40 of about 2,591 (159)

Intrinsic Fluctuations in Transpiration Induce Photorespiration to Oxidize P700 in Photosystem I

Plants, 2020
Upon exposure to environmental stress, the primary electron donor in photosystem I (PSI), P700, is oxidized to suppress the production of reactive oxygen species that could oxidatively inactivate the function of PSI.
Riu Furutani, Amane Makino, Yuij Suzuki, Shinya Wada, Ginga Shimakawa, Chikahiro Miyake   +5 more
doaj   +1 more source

Oxidation of P700 in Photosystem I Is Essential for the Growth of Cyanobacteria [PDF]

Plant Physiology, 2016
The photoinhibition of photosystem I (PSI) is lethal to oxygenic phototrophs. Nevertheless, it is unclear how photodamage occurs or how oxygenic phototrophs prevent it. Here, we provide evidence that keeping P700 (the reaction center chlorophyll in PSI) oxidized protects PSI.
Ginga Shimakawa, Keiichiro Shaku, Chikahiro Miyake   +2 more
openaire   +2 more sources

Higher Reduced State of Fe/S-Signals, with the Suppressed Oxidation of P700, Causes PSI Inactivation in Arabidopsis thaliana

Antioxidants, 2022
Environmental stress increases the risk of electron accumulation in photosystem I (PSI) of chloroplasts, which can cause oxygen (O2) reduction to superoxide radicals and decreased photosynthetic ability.
Riu Furutani, Shinya Wada, Kentaro Ifuku, Shu Maekawa, Chikahiro Miyake   +4 more
doaj   +1 more source

Sustained diurnal stimulation of cyclic electron flow in two tropical tree species Erythrophleum guineense and Khaya ivorensis

Frontiers in Plant Science, 2016
The photosystem II (PSII) activity of C3 plants is usually inhibited at noon associated with high light but can be repaired fast in the afternoon. However, the diurnal variation of photosystem I (PSI) activity is unknown.
Wei Huang, Ying-Jie Yang, Hong Hu, Kun-Fang Cao, Shi-Bao Zhang   +4 more
doaj   +1 more source

Photosynthetic physiological response of Radix Isatidis (Isatis indigotica Fort.) seedlings to nicosulfuron. [PDF]

PLoS ONE, 2014
Radix Isatidis (Isatis indigotica Fort.) is one of the most important traditional Chinese medicine plants. However, there is no suitable herbicide used for weed control in Radix Isatidis field during postemergence stage.
Xiangyang Yuan, Liguang Zhang, Na Ning, Yinyuan Wen, Shuqi Dong, Meiqiang Yin, Meijun Guo, Binqiang Wang, Lei Feng, Pingyi Guo   +9 more
doaj   +1 more source

Responses of Linear and Cyclic Electron Flow to Nitrogen Stress in an N-Sensitive Species Panax notoginseng

Frontiers in Plant Science, 2022
Nitrogen (N) is a primary factor limiting leaf photosynthesis. However, the mechanism of N-stress-driven photoinhibition of the photosystem I (PSI) and photosystem II (PSII) is still unclear in the N-sensitive species such as Panax notoginseng, and thus ...
Zhu Cun, Zhu Cun, Zhu Cun, Hong-Min Wu, Hong-Min Wu, Hong-Min Wu, Jin-Yan Zhang, Jin-Yan Zhang, Jin-Yan Zhang, Sheng-Pu Shuang, Sheng-Pu Shuang, Sheng-Pu Shuang, Jie Hong, Jie Hong, Jie Hong, Jun-Wen Chen, Jun-Wen Chen, Jun-Wen Chen   +17 more
doaj   +1 more source

Equilibration between cytochrome f and P700 in intact leaves

Biochimica et Biophysica Acta (BBA) - Bioenergetics, 2005
Electron transport between the two photosynthetic reaction centres of high plants is mediated by plastoquinone, a rieske iron-sulfur centre, cytochrome f and plastocyanin. Measurements of redox equilibration amongst these have produced confusing results, with apparent equilibrium constants being estimated that are inconsistent with in vitro ...
Golding, Alison J., Joliot, Pierre, Johnson, Giles N.; id_orcid 0000-0003-1536-5582   +2 more
openaire   +3 more sources

Electron flow from PSII to PSI under high light is controlled by PGR5 but not by PSBS

Frontiers in Plant Science, 2015
Absence of the PROTON GRADIENT REGULATION 5 (PGR5) protein from plant chloroplasts prevents the induction of strong trans-thylakoid proton gradient (ΔpH) and consequently also the thermal dissipation of excess energy (NPQ).
Mikko eTikkanen, Sanna eRantala, Eva-Mari eAro   +2 more
doaj   +1 more source

Use of chlorophyll fluorescence and P700 absorbance to rapidly detect glyphosate resistance in goosegrass (Eleusine indica)

Journal of Integrative Agriculture, 2015
The rapid detection of glyphosate resistance in goosegrass (Eleusine indica) will enhance our ability to respond to new resistant populations of this major weed.
Tai-jie ZHANG, Li FENG, Xing-shan TIAN, Cai-hong YANG, Jia-dong GAO   +4 more
doaj   +1 more source

Response of Chloroplast NAD(P)H Dehydrogenase-Mediated Cyclic Electron Flow to a Shortage or Lack in Ferredoxin-Quinone Oxidoreductase-Dependent Pathway in Rice Following Short-Term Heat Stress

Frontiers in Plant Science, 2016
Cyclic electron flow around PSI can protect photosynthetic electron carriers under conditions of stromal over-reduction. The goal of the research reported in this paper was to investigate the responses of both PSI and PSII to a short-term heat stress in ...
Jemaa eEssemine, Mingnan eQu, Hualing eMi, Xinguang eZhu   +3 more
doaj   +1 more source