Article
Biochemistry & Molecular Biology
Aynura Pashayeva, Guangxi Wu, Irada Huseynova, Choon-Hwan Lee, Ismayil S. Zulfugarov
Summary: This study investigated the role of thylakoid protein phosphorylation in regulating energy-dependent quenching of chlorophyll fluorescence in rice plants. The results showed that phosphorylated proteins were enhanced in the PsbS-KO mutant after illumination, indicating a light-induced process. It was suggested that this enhancement might be due to increased reactive-oxygen-species production in this mutant.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2021)
Article
Biochemistry & Molecular Biology
Artur Nosalewicz, Karolina Okon, Maria Skorupka
Summary: This study evaluates the effects of non-photochemical quenching (NPQ) components on the response of Arabidopsis thaliana to fluctuating light and water availability. It found that water deficit affects the dynamics of NPQ induced by fluctuating light and reduces plant capability to cope with it.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2022)
Article
Biochemistry & Molecular Biology
Kasane Suzuki, Shinji Masuda
Summary: The control of pH in chloroplasts is crucial for regulating photosynthesis, but the specific regulatory mechanisms of H+ homeostasis in chloroplasts are not fully understood. Recent research suggests that the cyanobacterial PxcA homolog DLDG1 is involved in controlling plastidial pH. By examining various double mutants lacking specific non-photochemical quenching (NPQ)-related proteins, it was found that PsbS functions upstream of DLDG1, PGR5 affects NPQ independently, and FLAP1 and DLDG1 regulate ΔpH independently.
Review
Plant Sciences
Alexander Ruban, Sam Wilson
Summary: Non-photochemical chlorophyll fluorescence quenching (NPQ) is a highly researched topic in photosynthesis, with a focus on the molecular mechanisms behind it. Recent studies have delved into the significance of NPQ in protecting RCII and monitoring qE component's lifespan, as well as the potential interplay between thylakoid membrane geometry, LHCII dynamics, PsbS protein, and thylakoid lipids in inducing a qE-related conformational change.
PLANT AND CELL PHYSIOLOGY
(2021)
Article
Plant Sciences
Elena M. Nadeeva, Lyudmila K. Ignatova, Natalia N. Rudenko, Daria V. Vetoshkina, Ilya A. Naydov, Marina A. Kozuleva, Boris N. Ivanov
Summary: Knockout of the At2g28210 gene in Arabidopsis thaliana resulted in alterations in photosynthetic processes, including increased effective quantum yields, decreased reduction state of plastoquinone pool, and higher electron transport rate. Non-photochemical quenching, state transitions, and light-dependent pH gradient were also affected. Starch content decreased and expression levels of chloroplast CAs changed noticeably in the knockout plants.
Article
Biochemistry & Molecular Biology
Belen Naranjo, Jan-Ferdinand Penzler, Thilo Ruehle, Dario Leister
Summary: The study demonstrates that NTRC negatively influences PGR5 activity, and the lack of both proteins has additive effects on plant photosynthesis and growth.
Article
Biochemistry & Molecular Biology
Akiko Yoshihara, Noriko Nagata, Hajime Wada, Koichi Kobayashi
Summary: The thylakoid membrane of cyanobacteria, plants, and algae mainly consists of uncharged galactolipids, but also includes anionic lipids such as sulfoquinovosyldiacylglycerol (SQDG) and phosphatidylglycerol (PG). Phosphatidylglycerol (PG) is essential for photosynthesis in all examined organisms, while the importance of SQDG varies. Additionally, plants produce another anionic lipid, glucuronosyldiacylglycerol (GlcADG), under phosphorus starvation, with its role still unclear. Studies on Arabidopsis mutants lacking PG and SQDG biosynthesis in plastids showed developmental defects in both photosynthetic and non-photosynthetic organs, indicating the pleiotropic role of these lipids. SQDG, but not GlcADG, is crucial for complementing PG in photosynthesis under PG-deficient conditions like phosphorus starvation.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2021)
Review
Biochemistry & Molecular Biology
Dandan Lu, Yi Zhang, Aihong Zhang, Congming Lu
Summary: This review summarizes the light-signaling pathways involved in photoprotection mechanisms and discusses key questions in these processes, emphasizing the importance of research on light-signaling mechanisms in plants.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2022)
Article
Plant Sciences
Wei Zhao, Quan Sheng Zhang, Ying Tan, Zhe Liu, Ming Yu Ma, Meng Xin Wang, Cheng Ying Luo
Summary: The marine angiosperm Zostera marina exhibits low-efficiency non-photochemical quenching under high-light conditions, with inability to produce energy-dependent quenching (qE) possibly due to limited construction of the trans-thylakoid proton gradient caused by photoinactivation of the oxygen evolving complex.
PHOTOSYNTHESIS RESEARCH
(2021)
Article
Plant Sciences
Marjaana Rantala, Aiste Ivanauskaite, Laura Laihonen, Sai Divya Kanna, Bettina Ughy, Paula Mulo
Summary: Plants acclimate to changes in light conditions through adjustments in thylakoid membrane ultrastructure and excitation energy transfer, with the involvement of acetyltransferase GNAT2 in thylakoid structure regulation.
PLANT AND CELL PHYSIOLOGY
(2022)
Article
Biology
Magdalena Trojak, Ernest Skowron
Summary: Photosynthetic organisms have evolved mechanisms to dissipate excess excitation energy and optimize light utilization for photosynthesis. This study demonstrated that monochromatic green light can reduce energy dissipation, while blue light enhances photosynthetic efficiency. Optimization of light spectrum plays a crucial role in modifying photosynthetic and photoprotective properties of plants.
Article
Plant Sciences
Nqobile Truelove Ndhlovu, Knut Asbjorn Solhaug, Farida Minibayeva, Richard Peter Beckett
Summary: Lichens have a problem of excess energy causing the formation of harmful reactive oxygen species. Fungi in the lichens can reduce reactive oxygen species formation by synthesizing melanins, while photobionts can dissipate excess energy through non-photochemical quenching. The use of fluorimetry techniques to measure non-photochemical quenching has limitations, but a dissection technique can accurately evaluate it. The level of non-photochemical quenching in melanised thalli may vary depending on the light history of the microhabitat and presence of other tolerance mechanisms.
Article
Forestry
Jimei Han, Lianhong Gu, Jeffrey M. Warren, Anirban Guha, David A. Mclennan, Wangfeng Zhang, Yali Zhang
Summary: The induction and relaxation of photochemistry and non-photochemical quenching (NPQ) in fluctuating environments depend on the phases of environmental fluctuations and the interactive effects of light and temperature. Increased fraction of open reaction centers in photosystem II (q(L)) can enhance the photosynthesis rate but is influenced by NPQ and temperature. When the light shifts from high to low intensity, NPQ remains at a high level causing a faster decline in photosynthesis.
Article
Plant Sciences
Thekla von Bismarck, Kuebra Korkmaz, Jeremy Russ, Kira Skurk, Elias Kaiser, Viviana Correa Galvis, Jeffrey A. Cruz, Deserah D. Strand, Karin Koehl, Juergen Eirich, Iris Finkemeier, Peter Jahns, David M. Kramer, Ute Armbruster
Summary: Understanding photosynthesis in natural light environments requires knowledge of the long-term acclimation as well as the short-term responses and their interactions. This study investigates the effects of light intensity and variability on thylakoid ion transport, which plays a crucial role in dynamic photosynthesis. The findings reveal that daily light intensity shapes photosynthetic capacity and fluctuations in light intensity enhance the accumulation of protective pigment zeaxanthin. The study also uncovers the role of ion transporters in regulating zeaxanthin accumulation and facilitating the transition to lower light intensities.
Article
Plant Sciences
Kunal Dhokne, Jayendra Pandey, Ranay Mohan Yadav, Pavithra Ramachandran, Jyoti Ranjan Rath, Rajagopal Subramanyam
Summary: Salt stress has adverse effects on the photosynthetic process and thylakoid structure in Pea. Under high salt conditions, the net photosynthetic rate decreases, water use efficiency improves, and the photochemical efficiency of both photosystems is reduced. Non-photochemical quenching is decreased, while non-regulated energy dissipation increases, leading to the inactivation of PSII. Salt stress also affects the electron transport chain, causing disorganization of thylakoid grana and altering the macro-organization and super complexes of thylakoids.
PLANT PHYSIOLOGY AND BIOCHEMISTRY
(2022)
