CRISPR/Cas Genome Editing Technologies for Plant Improvement against Biotic and Abiotic Stresses: Advances, Limitations, and Future Perspectives.

Crossbreeding, mutation breeding, and traditional transgenic breeding take much time to improve desirable characters/traits. CRISPR/Cas-mediated genome editing (GE) is a game-changing tool that can create variation in desired traits, such as biotic and abiotic resistance, increase quality and yield in less time with easy applications, high efficiency, and low cost in producing the targeted edits for rapid improvement of crop plants. Plant pathogens and the severe environment cause considerable crop losses worldwide. GE approaches have emerged and opened new doors for breeding multiple-resistance crop varieties. Here, we have summarized recent advances in CRISPR/Cas-mediated GE for resistance against biotic and abiotic stresses in a crop molecular breeding program that includes the modification and improvement of genes response to biotic stresses induced by fungus, virus, and bacterial pathogens. We also discussed in depth the application of CRISPR/Cas for abiotic stresses (herbicide, drought, heat, and cold) in plants. In addition, we discussed the limitations and future challenges faced by breeders using GE tools for crop improvement and suggested directions for future improvements in GE for agricultural applications, providing novel ideas to create super cultivars with broad resistance to biotic and abiotic stress.

Parenting practices, stressors and parental concerns during COVID-19 in Pakistan.

BACKGROUND: COVID-19 is a global crisis that has added fear, uncertainty, and stress to parents. Parents are going through several challenges related to school closure, financial insecurity and working remotely. These stressors are affecting the mental health of parents. OBJECTIVES: This study aimed to observe major stressors along with the impact of COVID-19 on parental concerns and practices during lockdown. PARTICIPANTS: Sample (N = 923) was selected through purposive sampling from parents attending Out Patients Departments of hospitals in three provincial capital cities of Pakistan having a high burden of COVID-19, i.e. Lahore, Karachi and Peshawar. Parents having at least one child younger than 18 years were included in the study. METHODS: A quantitative design was used using a COVID-19 Parenting Response Scale (α = 0.74). It was used as a self-administered tool for parents who knew how to read and write Urdu/English language, however it was conducted as a structured interview for those who could not read/write. Data was analyzed by applying descriptive statistics (frequency, mean, percentage), independent sample t-test and Pearson Product Moment Correlation. RESULTS: Findings of the current study showed several stressful factors for parents during COVID-19 pandemic, mainly financial burden, children's education, uncertainty of the situation, and many others. The study also suggests an association of parental concerns during COVID-19 with parenting practices. CONCLUSION: COVID-19 pandemic presents a global crisis not only of the health of the people but also on family relations and mental well-being. Findings of this research indicate the need for targeted and accessible interventions for mental health of parents especially during these challenging circumstances so that they can cope with the challenges in an effective way and be able to take care of their children better.