13 rezultātiem
Mitochondria and chloroplasts play key roles in plant-pathogen interactions. Cytidine-to-uridine (C-to-U) RNA editing is a critical post-transcriptional modification in mitochondria and chloroplasts that is specific to flowering plants. Multiple organellar RNA editing factors (MORFs) form a protein
Protoplasts can be used for genome editing using several different CRISPR systems, either separately or simultaneously, and that the resulting mutations can be recovered in regenerated non-chimaeric plants. Protoplast transfection and regeneration systems are useful platforms for CRISPR/Cas
Cytidine triphosphate (CTP) is essential for DNA, RNA and phospholipid biosynthesis. De novo synthesis is catalyzed by CTP synthases (CTPS). Arabidopsis encodes five CTPS isoforms that unanimously share conserved motifs found across kingdoms, suggesting all five are functional enzymes. Whereas
Nine Lhcb1 genes encoding the light-harvesting chlorophyll a/b-binding proteins of photosystem II were isolated and characterized from Nicotiana sylvestris. Their nucleotide sequences are highly similar. Lhcb1 transcripts are accumulated in leaves and stems but not in roots and non-green cultured
Genes encoding chlorophyll a/b-binding proteins of photosystem II (Lhcb) constitute a multigene family. Nine Lhcb1 genes have previously been isolated from the tobacco species, Nicotiana sylvestris, and the transcription initiation sites in vivo have been mapped. Reaction conditions from a
The distribution of incorporated synthetic cytokinins (N(6)-[8-(14)C]benzyladenine ([8-(14)C]bzl(6)Ade) and N(6)[8-(14)C]furfuryladenine ([8-(14)C]fr(6)Ade) in ribosomal RNA prepared from tobacco callus (Nicotiana tabacum L. var. Wis. No. 38) grown in the presence of one of these for 25 or 26 days
Sterile root cultures from Nicotiana tabacum were grown with H(3)-thymidine added to the medium for various intervals. Incorporation of the labeled nucleoside into nuclear DNA occurred in a fraction of the nuclei which increased with time. In addition, the cytoplasm of all cells incorporated enough
Genome editing technology is important for plant science and crop breeding. Genome-edited plants prepared using general CRISPR-Cas9 methods usually contain foreign DNA, which is problematic for production of genome-edited transgene-free plants for vegetative propagation or highly heterozygous hybrid
N 6 -methyl-adenosine (m6A) is a prevalent RNA modification in many species. Abnormal m6A methylation levels can lead to RNA dysfunction and can cause diseases. Tobacco mosaic virus (TMV) is one of the most devastating viruses for agricultural plants. It has many hosts, particularly including
In chloroplasts and plant mitochondria, specific cytidines in mRNAs are post-transcriptionally converted to uridines by RNA editing. Editing sites are recognized by nucleus-encoded RNA-binding proteins of the pentatricopeptide repeat (PPR) family, which bind upstream of the editing site in a
A computational analysis of RNA editing sites was performed on protein-coding sequences of plant mitochondrial genomes from Arabidopsis thaliana, Beta vulgaris, Brassica napus, and Oryza sativa. The distribution of nucleotides around edited and unedited cytidines was compared in 41 nucleotide
Tomato, Solanum lycopersicum (formerly Lycopersicon esculentum), has long been one of the classical model species of plant genetics. More recently, solanaceous species have become a model of evolutionary genomics, with several EST projects and a tomato genome project having been initiated. As a
Late-flowering ecotypes and mutants of Arabidopsis thaliana and the related crucifer Thlaspi arvense flower early after cold treatment (vernalization). Treatment with the DNA demethylating agent 5-azacytidine induced nonvernalized plants to flower significantly earlier than untreated controls.