RESUMEN
Nicotiana tabacum is a non-food herb that has the potential to be utilized as bio-factory for generating medicines, vaccines or valuable small metabolites. To achieve these goals, the improvement of genetic tools for pre-designed genome modifications is indispensable. The development of CRISPR/Cas nucleases allows the induction of site-specific double-strand breaks to enhance homologous recombination-mediated gene targeting (GT). However, the efficiency of GT is still a challenging obstacle for many crops including tobacco. Recently, studies in several plant species indicated that by replacing SpCas9 with other CRISPR/Cas-based nucleases, GT efficiencies might be enhanced considerably. Therefore, we tested SaCas9 as well as a temperature-insensitive version of LbCas12a (ttLbCas12a) for targeting the tobacco SuRB gene. At the same time, we also optimized the protocol for Agrobacterium-mediated tobacco transformation and tissue culture. In this way, we could improve GT efficiencies to up to a third of the inoculated cotyledons when using ttLbCas12a, which outperformed SaCas9 considerably. In addition, we could show that the conversion tract length of the GT reaction can be up to 606 bp long and in the majority of cases, it is longer than 250 bp. We obtained multiple heritable GT events, mostly heterozygous, but also biallelic GT events and some without T-DNA integration. Thus, we were not only able to obtain CRISPR/Cas-based heritable GT events in allotetraploid Nicotiana tabacum for the first time, but our results also indicate that ttLbCas12a might be a superior alternative for gene editing and GT in tobacco as well as in other crops.
Asunto(s)
Repeticiones Palindrómicas Cortas Agrupadas y Regularmente Espaciadas , Nicotiana , Sistemas CRISPR-Cas/genética , Repeticiones Palindrómicas Cortas Agrupadas y Regularmente Espaciadas/genética , Edición Génica , Marcación de Gen , Temperatura , Nicotiana/genéticaRESUMEN
The world has seen an explosion in mobile device technology over the past decade, in addition to the impact that COVID-19 has placed on nursing education programs. More specifically, mobile devices have afforded users with endless possibilities. This upsurge in mobile technology has altered the way people use and interact with their device. One such example is how these devices are being utilized for the purposes of learning due to social distancing guidelines. Thus, it becomes important to explore and understand those factors that will influence the use of mobile devices for learning. The purpose of this study was to explore variables that might influence the adoption of mobile devices among nursing faculty. The Unified Theory of Acceptance and Use of Technology served as the theoretical basis for this study and guiding framework. An exploratory quantitative survey research design was utilized to explore specific variables and their impact on mobile device adoption among participants. It was found that 85%, six of the seven research variables were statistically significant predictors of mobile device adoption. Mobile devices have the potential to leverage a wealth of resources for both users and faculty. Therefore, recommendations for developing increased use of mobile device technology for teaching and learning will be suggested.
Asunto(s)
COVID-19 , Educación en Enfermería , Aplicaciones Móviles , Computadoras de Mano , Humanos , SARS-CoV-2RESUMEN
Tattoos have become increasingly popular in the United States among the general population. Furthermore, the popularity of body art, primarily tattoos, among nursing students generates issues about professionalism in academics and in clinical settings. Nursing faculty are faced with conflicting views on cultural awareness, professionalism, and self-expression. With nursing viewed as one of the most trusted professions, the policy of covering tattoos should be discussed, and more research is necessary.