There is a misinterpretation in the literature regarding the variable orientation of the small single copy region of plastid genomes (plastomes). The common phenomenon of small and large single copy inversion, hypothesized to occur through
What mechanisms contribute to plastome structural diversity in Monsonia emarginata?The study reveals that intramolecular recombination and repeat-mediated inversion significantly influence plastome structure, resulting in unique arrangements in M. emarginata. Complex repeats, notably the R20 system, account for nearly 29% of the plastome sequence.How does GC content vary in plastomes among different species?M. emarginata exhibits a mean GC content of 43.3% in coding regions, surpassing values in related taxa, such as Arabidopsis thaliana. The elevated GC levels correlate with the dense repeat structure, particularly in intergenic areas.What role do inverted repeats play in plastome evolution?The absence of canonical inverted repeats (IR) in M. emarginata does not hinder recombination; rather, alternate arrangements arise through internal repeats. This study indicates that repeat-induced recombination can generate substantial structural diversity in plastomes without traditional IR.
«The Nobel Prize in Physiology or Medicine 1959 was awarded jointly to Severo Ochoa and Arthur Kornberg 'for their discovery of the mechanisms in the biological synthesis of ribonucleic acid and deoxyribonucleic acid'.»
Recently, the possibility of cross-kingdom gene expression regulation by miRNAs from other species (“xenomiRs”), specifically from plants, has acquired scien...
David S. Krantz is Professor Emeritus of Medical & Clinical Psychology and Professor Emeritus of Psychiatry (secondary), at Uniformed Services University of the Health Sciences. His research is in health psychology and behavioral medicine…