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| http://dx.doi.org/10.1073/pnas.49.2.248 | DOI Listing |
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Enhancing Acclimatization Conditions for 'Fire': A Comparative Analysis of Substrate Effects on Growth and Survival.
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January 2025
Department of Floriculture and Dendrology, Institute of Landscape Architecture, Urban Planning and Garden Art, Hungarian University of Agriculture and Life Sciences (MATE), Villányi Street 29-43, 1118 Budapest, Hungary.
This study investigates the acclimatization success of 'Fire', a popular ornamental bromeliad, through in vitro propagation on various substrates. Due to the increasing demand for , micropropagation offers a promising solution to overcome the limitations of traditional propagation methods. In this research, acclimatization was conducted in two trial types: in the one-step greenhouse conditions, and in two-step acclimatization, which introduced a controlled laboratory step before transferring plants to the greenhouse.
View Article and Find Full Text PDFCryo-EM structure of the NDH-PSI-LHCI supercomplex from Spinacia oleracea.
Nat Struct Mol Biol
January 2025
Department of Structural Biology, Max Planck Institute of Biophysics, Frankfurt am Main, Germany.
The nicotinamide adenine dinucleotide phosphate (NADPH) dehydrogenase (NDH) complex is crucial for photosynthetic cyclic electron flow and respiration, transferring electrons from ferredoxin to plastoquinone while transporting H across the chloroplast membrane. This process boosts adenosine triphosphate production, regardless of NADPH levels. In flowering plants, NDH forms a supercomplex with photosystem I, enhancing its stability under high light.
View Article and Find Full Text PDFPhysical properties of chlorophyll-quinone conjugates prepared via Friedel-Crafts reaction.
Photosynth Res
January 2025
Graduate School of Life Sciences, Ritsumeikan University, Kusatsu, Shiga, 525-8577, Japan.
Pheophytin-a derivatives possessing plastoquinone and phylloquinone analogs in the peripheral 3-substituent were prepared by Friedel-Crafts reactions of a 3-hydroxymethyl-chlorin as one of the chlorophyll-a derivatives with benzo- and naphthohydroquinones, respectively, and successive oxidation of the 1,4-dihydroxy-aryl groups in the resulting dehydration products. The 3-quinonylmethyl-chlorins exhibited ultraviolet-visible absorption and circular dichroism spectra in acetonitrile, which were composed of those of the starting 3-hydroxymethyl-chlorin and the corresponding methylated benzo- and naphthoquinones. No intramolecular interaction between the chlorin and quinone π-systems was observed in the solution owing to the methylene spacer.
View Article and Find Full Text PDFEngineering Cascade Bio-solar Cells Inspired by the Z-Scheme of Oxygenic Photosynthesis: Layered Chlorophyll and Bacterio-chlorophyll Derivatives.
ChemSusChem
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Kwansei Gakuin University: Kansei Gakuin Daigaku, Department of Applied Chemistry for Environment, 1 Gakuen-Uegahara, 669-1330, Sanda, JAPAN.
The natural Z-scheme of oxygenic photosynthesis efficiently drives electron transfer from photosystem II (PSII) to photosystem I (PSI) via an electron transport chain, despite the lower energy levels of PSII. Inspired by this sophisticated mechanism, we present a layered cascade bio-solar cell (CBSC) that emulates the Z-scheme. In this design, chlorophyll derivatives (Chl) act as PSI analogs, while bacteriochlorophyll derivatives (BChl) serve as PSII analogs in the active layer.
View Article and Find Full Text PDFDevelopment of a TSR-based method for understanding structural relationships of cofactors and local environments in photosystem I.
BMC Bioinformatics
January 2025
Department of Chemistry, University of Louisiana at Lafayette, Lafayette, LA, 70504, USA.
Background: All chemical forms of energy and oxygen on Earth are generated via photosynthesis where light energy is converted into redox energy by two photosystems (PS I and PS II). There is an increasing number of PS I 3D structures deposited in the Protein Data Bank (PDB). The Triangular Spatial Relationship (TSR)-based algorithm converts 3D structures into integers (TSR keys).
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