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Mutation in FvPAL2 leads to light red strawberry fruits and yellow-green petioles.
Plant Sci
December 2024
Shanghai Collaborative Innovation Center of Agri-Seeds, School of Agriculture and Biology, Shanghai Jiao Tong University, Shanghai, China. Electronic address:
In recent years, light red or white strawberries have attracted much attention because of their unusual color, however, the mechanism of strawberry color formation, especially light red strawberry color, is not well understood. By EMS mutagenesis of woodland strawberry (Fragaria vesca), we identified two mutants, rg40 and rg120, with light red fruit and yellow-green petiole, and allelic hybridization and BSA mixed-pool sequencing revealed that the phenotype was caused by mutation in the FvPAL2 protein in the anthocyanin synthesis pathway. Enzyme activity experiments showed that the mutant FvPAL2 protein barely catalyzed the substrate conversion normally, thus blocking anthocyanin synthesis, which in turn led to a decrease in anthocyanin accumulation in fruits and petioles.
View Article and Find Full Text PDFA recurrent neural circuit in Drosophila temporally sharpens visual inputs.
Curr Biol
December 2024
Department of Neurobiology, Stanford University, Stanford, CA 94305, USA. Electronic address:
A critical goal of vision is to detect changes in light intensity, even when these changes are blurred by the spatial resolution of the eye and the motion of the animal. Here, we describe a recurrent neural circuit in Drosophila that compensates for blur and thereby selectively enhances the perceived contrast of moving edges. Using in vivo, two-photon voltage imaging, we measured the temporal response properties of L1 and L2, two cell types that receive direct synaptic input from photoreceptors.
View Article and Find Full Text PDFInsights into the divergence of the photosynthetic LH1 complex obtained from structural analysis of the unusual photocomplexes of Roseospirillum parvum.
Commun Biol
December 2024
Photosynthesis Research Center, Key Laboratory of Photobiology, Institute of Botany, Chinese Academy of Sciences, Beijing, China.
Purple phototrophic bacteria produce two kinds of light-harvesting complexes that function to capture and transmit solar energy: the core antenna (LH1) and the peripheral antenna (LH2). The apoproteins of these antennas, encoded respectively by the genes pufBA and pucBA within and outside the photosynthetic gene cluster, respectively, exhibit conserved amino acid sequences and structural topologies suggesting they were derived from a shared ancestor. Here we present the structures of two photosynthetic complexes from Roseospirillum (Rss.
View Article and Find Full Text PDFSuperatomic Stabilization of Dinuclear Platinum(III) through Iodide-Bridged Five-Center Ten-Electron Bonding.
Inorg Chem
December 2024
Department of Chemistry, Graduate School of Science, Tohoku University, 6-3 Aramaki-Aza-Aoba, Aoba-Ku, Sendai 980-8578, Japan.
One of the goals in synthetic chemistry is to obtain compounds featuring unusual valence states that are stable under ambient conditions. At present, stabilizing unusual Pt(III) states is considered difficult, except through direct Pt-Pt bonding such as that in platinum-blues or organometallization using bulky ligands. Pt(III) stabilization is also very difficult in halogen-bridged metal complex chains (MX-Chains).
View Article and Find Full Text PDFLong-term sequelae of stage 4A ROP after successful management with lens-sparing vitrectomy.
BMJ Case Rep
December 2024
Department of Ophthalmology, Government Medical College and Hospital, Chandigarh, Chandigarh, India.
We present an unusual case of a macular lesion, possibly a spontaneously closed macular hole, at a 4-year follow-up visit, after lens-sparing vitrectomy (LSV) in stage 4A retinopathy of prematurity (ROP). Optical coherence tomography scans of the macula were suggestive of a spontaneously closed macular hole and fibrovascular proliferation at the equator. We hypothesise that tangential traction by residual posterior hyaloid could lead to late macular hole formation after LSV in ROP.
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