The edges of the thylakoids are connected with the plasmalemma in the cyanobacterium Synechococcus sp., strain 715, this leading to partial compartmentalization of the cytoplasm in the cell.
Download full-text PDF |
Source |
|---|
Publication Analysis
Top Keywords
Similar Publications
Functional organization of 3D plant thylakoid membranes as seen by high resolution microscopy.
Biochim Biophys Acta Bioenerg
November 2024
Université Paris-Saclay, CEA, CNRS, Institute for Integrative Biology of the Cell (I2BC), 91198 Gif-sur-Yvette, France.
In the field of photosynthesis, only a limited number of approaches of super-resolution fluorescence microscopy can be used, as the functional architecture of the thylakoid membrane in chloroplasts is probed through the natural fluorescence of chlorophyll molecules. In this work, we have used a custom-built fluorescence microscopy method called Single Pixel Reconstruction Imaging (SPiRI) that yields a 1.4 gain in lateral and axial resolution relative to confocal fluorescence microscopy, to obtain 2D images and 3D-reconstucted volumes of isolated chloroplasts, obtained from pea (Pisum sativum), spinach (Spinacia oleracea) and Arabidopsis thaliana.
View Article and Find Full Text PDFMembrane association of active genes organizes the chloroplast nucleoid structure.
Proc Natl Acad Sci U S A
July 2024
Department of Molecular, Cellular, and Developmental Biology, University of Michigan, Ann Arbor, MI 48109.
DNA is organized into chromatin-like structures that support the maintenance and regulation of genomes. A unique and poorly understood form of DNA organization exists in chloroplasts, which are organelles of endosymbiotic origin responsible for photosynthesis. Chloroplast genomes, together with associated proteins, form membrane-less structures known as nucleoids.
View Article and Find Full Text PDFLight-independent pathway of STN7 kinase activation under low temperature stress in runner bean (Phaseolus coccineus L.).
BMC Plant Biol
June 2024
Department of Metabolic Regulation, Institute of Biochemistry, Faculty of Biology, University of Warsaw, Miecznikowa 1, Warsaw, 02-096, Poland.
Article Synopsis
- The phosphorylation of the Light-Harvesting Complex of photosystem II (LHCII) by STN7 kinase is crucial for regulating photosynthesis, particularly under changing light conditions, and can also happen in the dark due to chilling.
- Research on runner bean showed that dark-chilling leads to light-independent LHCII phosphorylation, linked to reduced plastoquinone (PQ) pool levels and potential relocation within the thylakoid membrane.
- The study suggests a new pathway where the activation of oxidative pentose phosphate pathway enzymes triggers a series of biochemical events that ultimately lead to LHCII phosphorylation, highlighting the intricate functioning of photosynthetic processes even without light.
Thylakoid membrane stacking controls electron transport mode during the dark-to-light transition by adjusting the distances between PSI and PSII.
Nat Plants
March 2024
Department of Biomolecular Sciences, Weizmann Institute of Science, Rehovot, Israel.
The balance between linear electron transport (LET) and cyclic electron transport (CET) plays an essential role in plant adaptation and protection against photo-induced damage. This balance is largely maintained by phosphorylation-driven alterations in the PSII-LHCII assembly and thylakoid membrane stacking. During the dark-to-light transition, plants shift this balance from CET, which prevails to prevent overreduction of the electron transport chain and consequent photo-induced damage, towards LET, which enables efficient CO assimilation and biomass production.
View Article and Find Full Text PDF2-Cys peroxiredoxins contribute to thylakoid lipid unsaturation by affecting ω-3 fatty acid desaturase 8.
Plant Physiol
May 2024
Departamento de Bioquímica Vegetal y Biología Molecular, Instituto de Bioquímica Vegetal y Fotosíntesis , Universidad de Sevilla and CSIC, Avda. Américo Vespucio, 49, 41092 Sevilla, Spain.
Fatty acid unsaturation levels affect chloroplast function and plant acclimation to environmental cues. However, the regulatory mechanism(s) controlling fatty acid unsaturation in thylakoid lipids is poorly understood. Here, we have investigated the connection between chloroplast redox homeostasis and lipid metabolism by focusing on 2-Cys peroxiredoxins (Prxs), which play a central role in balancing the redox state within the organelle.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!