Nanomaterials, Journal Year: 2024, Volume and Issue: 14(21), P. 1746 - 1746
Published: Oct. 30, 2024
The escalating release of multi-walled carbon nanotubes (MWCNTs) into the environment has raised concerns due to their potential ecotoxicological impacts. However, combined phytotoxicity with heavy metals such as copper (Cu) is still unclear. This study investigated individual and toxic effects MWCNTs (MWCNT, MWCNT-OH, MWCNT-COOH) Cu
Language: Английский
Biochimica et Biophysica Acta (BBA) - Bioenergetics, Journal Year: 2024, Volume and Issue: 1865(3), P. 149032 - 149032
Published: Feb. 22, 2024
Language: Английский
Citations
13
Proceedings of the National Academy of Sciences, Journal Year: 2025, Volume and Issue: 122(4)
Published: Jan. 23, 2025
Phycobilisomes (PBS) are the major photosynthetic light-harvesting complexes in cyanobacteria and red algae. While structures of PBS have been determined atomic resolutions, how attached to reaction centers photosystems remains less clear. Here, we report that a linker protein (LcpA) is required for attachment photosystem II (PSII) cyanobacterium Synechococcus sp. PCC 7002. We also PB-loop PBS, which located within α-APC domain ApcE, PSII. Deletion either or gene A0913 led decreased rate photoautotrophic growth under illumination green light, preferentially absorbed by PBS. A double mutant lacking (ΔPBL-0913) showed complete inhibition O 2 evolution 590 nm light could not grow illumination. assembled be isolated from ΔPBL-0913, energy transfer its PSII was blocked as measured fluorescence induction. Photobleaching with intact cells movement speed ΔPBL-0913 2.5 times fast wild type, suggesting association thylakoids weakened significantly. The pull-down coimmunoprecipitation results LcpA interacts CP47 subunit through N-terminal region ApcB C-terminal α-helix motif. Our provide insights into molecular mechanism PBS–PSII shed on excitation
Language: Английский
Citations
0
Frontiers in Plant Science, Journal Year: 2025, Volume and Issue: 16
Published: March 10, 2025
Chinese chestnut ( Castanea mollissima ) is a significant woody food plant that has garnered increasing attention due to its potential role in addressing security challenges. However, low yield remains critical issue facing the industry. One contributing factor this insufficient light, particularly since chestnuts predominantly grow mountainous regions. Therefore, present study aims investigate intrinsic mechanisms underlying resistance light stress, identify and validate genes associated with stress tolerance, provide foundation for targeted breeding of varieties can withstand stress. Studies have demonstrated light-harvesting chlorophyll a/b Lhca/b proteins play key roles regulating adaptation plants low-light there been no reports on gene family under We initially identified 17 CmLhca/b members across genome constructed phylogenetic tree divided them into five subgroups: Lhca, Lhcb, CP24, CP26, CP29 groups. CmLhcb2.1 CmLhcb2.2 were grouped same branch GhLhcb2.3 upland cotton involved synthesis.The leaves exhibited phenotypic transcriptomic differences normal conditions. By 10th day shading treatment, showed signs damage, extent damage intensifying as intensity increased. Additionally, leaf color darkened gradual increase b content, which was correlated increased intensity. The upregulated all intensities. Specifically, quantitative reverse transcription PCR (qRT-PCR) confirmed upregulation Overexpression studies tobacco indicated enhances by promoting synthesis. Finally, yeast one-hybrid dual-luciferase reporter assays CmGLK positively regulated . These findings lay theoretical exploring how regulates
Language: Английский
Citations
0
Photosynthesis Research, Journal Year: 2025, Volume and Issue: 163(2)
Published: March 10, 2025
Language: Английский
Citations
0
Cleaner Engineering and Technology, Journal Year: 2025, Volume and Issue: unknown, P. 100948 - 100948
Published: March 1, 2025
Language: Английский
Citations
0
The Plant Cell, Journal Year: 2024, Volume and Issue: 36(10), P. 3895 - 3896
Published: July 20, 2024
Language: Английский
Citations
3
Advances in microbial physiology/Advances in Microbial Physiology, Journal Year: 2024, Volume and Issue: unknown, P. 97 - 144
Published: Jan. 1, 2024
Language: Английский
Citations
1
FEBS Journal, Journal Year: 2024, Volume and Issue: unknown
Published: Aug. 7, 2024
Phytoplankton are a major source of primary productivity. Their photosynthetic fluorescence unique measures their type, physiological state, and response to environmental conditions. Changes in phytoplankton photophysiology commonly monitored by bulk spectroscopy, where gradual changes reported different perturbations, such as light intensity changes. What is the meaning trends parameters if values report ensemble averages multiple unsynchronized cells? To answer this, we developed an experimental scheme that enables tracking intensities, brightnesses, ratios, well mean photon nanotimes equivalent lifetimes, one cell at time. We three species during diurnal cycles abrupt increase intensity. Our results show can define specific subpopulations cells for each species, varying Importantly, identify undergo well‐defined transitions between these subpopulations. The approach shown this work will be useful exact characterization states parameter signatures experience marine environments, which applicable monitoring marine‐related effects.
Language: Английский
Citations
0
bioRxiv (Cold Spring Harbor Laboratory), Journal Year: 2024, Volume and Issue: unknown
Published: Sept. 15, 2024
Abstract Phycobilisomes are versatile cyanobacterial antenna complexes that harvest light energy to drive photosynthesis. These can also adapt various conditions, dismantling under high prevent photo-oxidation and arranging in rows low increase harvesting efficiency. Light quality influences phycobilisome structure function, as observed far-red exposure. Here we describe a new, linker protein, ApcI (previously hypothetical protein sll1911), expressed specifically red light. We characterized Synechocystis sp. PCC 6803 using mutant strain analyses, binding experiments, interaction studies. Mutation of apcI conferred tolerance compared wild type with reduced transfer from phycobilisomes the photosystems. Binding experiments revealed replaces ApcG at membrane-facing side core paralogous C-terminal domain. Additionally, N-terminal extension was found interact photosystem II. Our findings highlight importance remodeling for adaptation different conditions. The characterization provides new insights into mechanisms by which cyanobacteria optimize light-harvesting response varying environments.
Language: Английский
Citations
0
Plant and Cell Physiology, Journal Year: 2024, Volume and Issue: unknown
Published: Oct. 3, 2024
Abstract Photosynthesis in the world’s oceans is primarily conducted by phytoplankton, microorganisms that use many different pigments for light capture. Synechococcus a unicellular cyanobacterium estimated to be second most abundant marine phototroph, with global population of 7 × 1026 cells. This group’s success partly due pigment diversity their photosynthetic harvesting antennae, which maximize photon capture photosynthesis. Many isolates adjust antennae composition response shifts blue:green ratio ambient light. was named type 4 chromatic acclimation (CA4). Research has made significant progress understanding CA4 across scales, from its ecological importance molecular mechanisms. Two forms exist, each correlated occurrence one two distinct but related genomic islands. Several genes these islands are differentially transcribed ratio. The encoded proteins control addition blue versus green light, altering absorption characteristics These regulated several putative transcription factors also Ecologically, types, occurring over 40% oceanwide. It predominates at higher latitudes and depth, suggesting beneficial under sub-saturating irradiances. Future research will further clarify role mechanisms controlling this globally important form phenotypic plasticity.
Language: Английский
Citations
0