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Carbon sinks associated with biological carbon pump in karst surface waters: progress, challenges, and prospects.
Environ Res
December 2024
Xi'an Institute for Innovative Earth Environment Research, Institute of Earth Environment Chinese Academy of Sciences, Xi'an 710061, China; Xi'an Institute for Innovative Earth Environment Research, Xi'an 710061, China.
The biological carbon pump (BCP) associated with aquatic photosynthesis in karst surface waters converts dissolved inorganic carbon (DIC) into organic carbon. In the context of global climate change, BCP could be an important carbon sink mechanism, ultimately regulating atmospheric carbon dioxide (CO) and mitigating climate change. Because of the high DIC and pH, and low dissolved CO [CO (aq)], the hydrochemical characteristics of karst surface water bodies cause C limitation in BCP efficiency.
View Article and Find Full Text PDFChemoproteomic Profiling Reveals Chlorogenic Acid as a Covalent Inhibitor of Dehydroascorbate Reductase 1.
J Agric Food Chem
December 2024
School of Biotechnology and Food Engineering, Changshu Institute of Technology, Suzhou 215500, China.
Chlorogenic acid (CA) is an abundant plant secondary metabolite with promising allelopathic effects on weed growth. However, the molecular targets and mechanism of action of CA in plants remain elusive. Here, we report the employment of a clickable photoaffinity probe in identifying the protein targets of CA in seedling proteomes.
View Article and Find Full Text PDFPreliminary Treatment by Exogenous 24-Epibrassinolide Influences Burning-Induced Electrical Signals and Following Photosynthetic Responses in Pea ( L.).
Plants (Basel)
November 2024
Department of Biophysics, N.I. Lobachevsky State University of Nizhny Novgorod, 603950 Nizhny Novgorod, Russia.
Long-distance electrical signals (ESs) are an important mechanism of induction of systemic adaptive changes in plants under local action of stressors. ES-induced changes in photosynthesis and transpiration play a key role in these responses increasing plant tolerance to action of adverse factors. As a result, investigating ways of regulating electrical signaling and ES-induced physiological responses is a perspective problem of plant electrophysiology.
View Article and Find Full Text PDFRedesign of the Chlamydomonas reinhardtii Q binding niche reveals photosynthesis works in the absence of a driving force for Q-Q electron transfer.
Physiol Plant
December 2024
Institute of Crystallography, National Research Council, Monterotondo Stazione (RM), Italy.
An in silico redesign of the secondary quinone electron acceptor (Q) binding pocket of the D1 protein of Photosystem II (PSII) suggested that mutations of the F265 residue would affect atrazine binding. Chlamydomonas reinhardtii mutants F265T and F265S were produced to obtain atrazine-hypersensitive strains for biosensor applications, and the mutants were indeed found to be more atrazine-sensitive than the reference strain IL. Fluorescence and thermoluminescence data agree with a weak driving force and confirm slow electron transfer but cannot exclude an additional effect on protonation of the secondary quinone.
View Article and Find Full Text PDFHow Small Proteins Adjust the Metabolism of Cyanobacteria Under Stress: The Role of Small Proteins in Cyanobacterial Stress Responses.
Bioessays
December 2024
Genetics and Experimental Bioinformatics, Faculty of Biology, University of Freiburg, Freiburg, Germany.
Several recently discovered small proteins of less than 100 amino acids control important, but sometimes surprising, steps in the metabolism of cyanobacteria. There is mounting evidence that a large number of small protein genes have also been overlooked in the genome annotation of many other microorganisms. Although too short for enzymatic activity, their functional characterization has frequently revealed the involvement in processes such as signaling and sensing, interspecies communication, stress responses, metabolism, regulation of transcription and translation, and in the formation of multisubunit protein complexes.
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