ABSTRACT
In this study, we report genetic characterization of Orobanche cumana, the causal agent of sunflower wilting in Serbia. The genetic diversity of this parasitic plant in Serbia was not studied before. Random amplified polymorphic DNA (RAPD) markers and partial rbcL gene sequences analysis were used to characterize the O. cumana populations at the molecular level. While phylogenetic analyses of RAPD-PCR amplicons were performed using unweighted pair-group Method analyses, rbcL gene sequences were analyzed using neigbor joining method and minimum spanning tree. Molecular analyses of RAPD-PCR analysis revealed high genetic diversity of O. cumana populations which indicated high adaptive potential of this parasitic weed in Serbia. Further analyses of rbcL gene using minimum spanning tree revealed clear differences among diverse sections of Orobanche genus. Although this molecular marker lacked the resolution to display intrapopulation diversity it could be a useful tool for understanding the evolution of this parasitic plant. Our results suggested that O. cumana has great genetic potential which can lead to differentiation of more virulent races which is important for determining crop breeding strategies for their control.
ABSTRACT
Postoperative mental disorders are a common complication of cardiovascular surgery, with serious consequences. The main types of postoperative mental disorders include postoperative delirium and postoperative cognitive dysfunction. Their incidence ranges up to 15%-80%. Postoperative mental disorders may be reversible and irreversible. Although reversible in most cases, postoperative mental disorders are associated with increased mortality, morbidity and increasing costs of treatment. The treatment is usually symptomatic and may be associated with dangerous side effects. Safer and more effective is preventive action. Preoperative preventive action need to recognize, avoid and optimize risk factors. Intraoperative prevention involves maintaining optimal oxygenation of the brain during cardiovascular surgery. For postoperative prevention, multimodal approach is applied. It includes early extubation, early enteral nutrition, early mobilization, regular evaluation of cognitive function, activation of cognitive function and optimal analgesia, which requires teamwork of medical staff who care for patients. Combining all these methods can show promising results in reducing the incidence of postoperative mental disorders as a complication in cardiovascular surgery.
Subject(s)
Cardiovascular Surgical Procedures/adverse effects , Cognition Disorders/etiology , Delirium/etiology , Postoperative Complications/prevention & control , Cognition Disorders/prevention & control , Cognition Disorders/therapy , Delirium/prevention & control , Delirium/therapy , HumansABSTRACT
BACKGROUND: A Chenopodium album L. biotype surviving in atrazine-treated Serbian corn fields (VC) was compared against atrazine-susceptible (S) and atrazine-resistant (R) standards. RESULTS: Atrazine (2 kg ha(-1)) killed S and VC shoot biomass 15 days after treatment (DAT), but R was only suppressed by 42% and survived 8 kg ha(-1). Atrazine at 2 kg ha(-1) only inhibited VC height by 60% as against 100 and 0% for S and R respectively. Chlorophyll fluorescence (Fv/Fm) and transpiration were insensitive to atrazine in R, but were inhibited by 90 and 100% in S and by 50 and 60% in VC respectively. Decline of Fv/Fm after 2 kg ha(-1) atrazine was stabilized at 3 DAT for the VC biotype. CONCLUSION: A toxicity mitigation mechanism could have facilitated VC survival in an atrazine-treated field. Further knowledge on this mechanism is needed to establish if surviving VC plants are indicators of atrazine resistance evolution in these Serbian corn fields. Variables related to foliar function provided better detection of weed mechanisms to survive herbicide action than the usual shoot biomass measurements.