In young Arabidopsis seedlings, retrograde signalling from plastids regulates the expression of photosynthesis-associated nuclear genes in response to the developmental and functional state of the chloroplasts. The chloroplast-located PPR protein GUN1 is required for signalling following disruption of plastid protein synthesis early in seedling development before full photosynthetic competence has been achieved. Recently we showed that sucrose repression and the correct temporal expression of LHCB1, encoding a light-harvesting chlorophyll protein associated with photosystem II, are perturbed in gun1 mutant seedlings. ( 1) Additionally, we demonstrated that in gun1 seedlings anthocyanin accumulation and the expression of the "early" anthocyanin-biosynthesis genes is perturbed. Early seedling development, predominantly at the stage of hypocotyl elongation and cotyledon expansion, is also affected in gun1 seedlings in response to sucrose, ABA and disruption of plastid protein synthesis by lincomycin. These findings indicate a central role for GUN1 in plastid, sucrose and ABA signalling in early seedling development.
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http://dx.doi.org/10.4161/psb.6.4.14900 | DOI Listing |
IDCases
December 2024
Division of Infectious Diseases, Department of Internal Medicine, Rush University Medical Center, Chicago, IL, USA.
Dalbavancin is a novel long acting lipoglycopeptide antibiotic with a favorable safety profile approved for treating Acute Bacterial Skin and Skin Structure Infections (ABSSSI) caused by Gram-positive organisms. Given its long half-life, a two-dose regimen can provide effective systemic therapy for up to six weeks, making it an appealing option to avoid prolonged intravenous antibiotic therapy. Herein, we report a case of a 27-year-old male who developed dalbavancin-induced fever while treating Methicillin-sensitive (MSSA) bacteremia.
View Article and Find Full Text PDFTheor Appl Genet
January 2025
CSIRO Agriculture and Food, 2 Clunies Ross Street, Acton, ACT, 2601, Australia.
In this first QTL mapping study of embryo size in barley, novel and stable QTL were identified and candidate genes underlying a significant locus independent of kernel size were identified based on orthologous analysis and comparison of the whole-genome assemblies for both parental genotypes of the mapping population. Embryo, also known as germ, in cereal grains plays a crucial role in plant development. The embryo accounts for only a small portion of grain weight but it is rich in nutrients.
View Article and Find Full Text PDFFood Chem
January 2025
Laboratory for Functional Foods and Human Health, Center for Excellence in Post-Harvest Technologies, North Carolina Agricultural and Technical State University, NC Research Campus, 500 Laureate Way, Kannapolis, North Carolina 28081, United States. Electronic address:
Barley (Hordeum vulgare L.; Poaceae), the second most important grain after wheat, contains phenolamides, specifically hordatines and their agmatinated precursors. Hordatines are the unique compounds found in barley, consumption of which is associated with beneficial effects for human health.
View Article and Find Full Text PDFSci Total Environ
January 2025
School of Geographic and Oceanographic Sciences, Nanjing University, Nanjing 210023, China.
Crop plant microbiomes are increasingly seen as important in plant nutrition and health, and a key to maintaining food productivity. Currently, little is known of the temporal changes that occur in the wheat rhizosphere microbiome as the plant develops, and how this varies among different sites. We used a pot-based mesocosm experiment with the same modern wheat cultivar grown in eight soils from across the North China Plain, a major wheat producing area.
View Article and Find Full Text PDFBot Stud
January 2025
Department of Life Sciences, National Chung Hsing University, Taichung, 40227, Taiwan.
Ice plant (Mesembryanthemum crystallinum L.) is a halophyte and an inducible CAM plant. Ice plant seedlings display moderate salt tolerance, with root growth unaffected by 200 mM NaCl treatments, though hypocotyl elongation is hindered in salt-stressed etiolated seedlings.
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