RESUMO
Drought stress (DS) is a significant abiotic stress that limits agricultural productivity worldwide. In semi-arid climates, one potential solution to alleviate the deleterious effects of drought is the use of soil amendments such as nanoparticles. The current research was conducted out to probe the sway of drought at critical growth stages (CGS) of wheat crop (D0: Control, D1: Drought at tillering stage, and D2: Drought at anthesis stage) and the application of Cu-nanoparticles (T0: 0 mg L-1, T1: 300 mg L-1, T2: 700 mg L-1, and T3: 950 mg L-1) in order to improve drought resilience. Results of the study revealed that DS considerably decreased the wheat growth and yield during CGS. However, Cu-nanoparticles application alleviated the detrimental backlash of DS and led to improvements in various aspects of wheat growth and yield, including plant height, spike length, 1000 grain weight, stomatal conductance, leaf chlorophyll content, water use efficiency, leaf turgor potential, relative water content, and ultimately the grain yield. The use of principal component analysis allowed us to integrate and interpret the diverse findings of our study, elucidating the impact of Cu-nanoparticle treatment on wheat growth and yield under drought. Overall, the study concluded that DS during the anthesis stage had the most significant negative impact on crop yield. However, applying Cu-nanoparticles at the rate of 300 mg L-1 proved to be an effective strategy for improving crop productivity by reducing the harmful effects of drought.
Assuntos
Cobre , Secas , Triticum , Triticum/crescimento & desenvolvimento , Triticum/efeitos dos fármacos , Nanopartículas Metálicas/química , Estresse Fisiológico , Água/metabolismo , Folhas de Planta/crescimento & desenvolvimento , Folhas de Planta/efeitos dos fármacos , Clorofila/metabolismo , Solo/químicaRESUMO
Appendicitis, an inflammation of the vermiform appendix, is one of the most common causes of acute abdomen and one of the most frequent indications for emergency abdominal surgery worldwide. Any person older than 65 years old is considered elderly. The elderly population constitutes only 5-10% of total appendicitis cases. The symptoms depend on the location of the appendix. Generally, lower abdominal pain and anorexia are known to be the most common symptoms of appendicitis. Although young adults have a higher prevalence of appendicitis, the elderly have a higher complication rate, 37.5% versus 43.97%. In this article, we report a case of appendicitis in an 86-year-old gentleman known to have type 2 diabetes mellitus, hypertension, and prostate cancer. The patient was managed successfully after a complicated hospital course and discharged in an improved and stable condition.