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Drought stress significantly hampers crop growth and yield by negatively impacting various biochemical and physiological plant processes. This study aimed to assess drought tolerance in traditional rice varieties using Poly Ethylene Glycol 6000 (PEG 6000) and focused on the effectiveness of melatonin applied through both seed treatment and foliar spray in mitigating the effects of drought stress. The optimal drought screening conditions were determined at a PEG concentration of -4 bars. As the PEG concentration increased, key factors such as germination percentage, vigor index, root length, and shoot length decreased. This indicates that PEG can be a useful tool for early selection of drought tolerant rice varieties. Melatonin (N-acetyl-5-methoxytryptamine), known for alleviating abiotic stress, showed positive effects on seed germination at 200 ppm concentration. The study observed that stomatal closure is a natural response to drought stress, but melatonin application induced partial stomatal opening. Notably, a foliar spray of 100 ppm melatonin demonstrated better recovery from drought stress compared to the 200 ppm concentration. In conclusion, the research suggests that seed treatment with 200 ppm melatonin and foliar spraying with 100 ppm melatonin are the most effective approaches for reducing the adverse effects of drought stress in rice plants.
RESUMEN
Purpose: To compare the visual outcomes and complications between the eyes receiving retropupillary iris claw intraocular lens (IOL) and scleral-fixated IOL (SFIOL) for post-cataract aphakia. Methods: Medical records of consecutive patients who had iris claw IOL and SFIOL surgery from January 2010 to March 2015, with > 1 year of follow up were retrospectively analyzed. The surgical technique was based on individual surgeon preference. The best-corrected distance visual acuity (BCDVA), previous surgery, surgical technique, and complications were analyzed. Results: Retropupillary iris claw IOL was fixated in 48 eyes (46%) and SFIOL was performed in 56 eyes. Iris claw was performed more frequently at the time of primary cataract surgery (56%) compared to SFIOL (14%) (P < 0.001). At 1 month postoperative, BCDVA was significantly better in the SFIOL group [0.7 ± 0.5 logarithm of minimum angle of resolution (logMAR) in iris claw vs. 0.3 ± 0.2 logMAR in SFIOL, P < 0.001] but this difference did not persist at 1 year (0.4 ± 0.4 logMAR in iris claw vs. 0.3 ± 0.2 logMAR in SFIOL, P = 0.56). Eyes with iris claw IOL experienced significantly more postoperative iritis (17%), intraocular pressure spikes (10%), and ovalization of the pupil (16%). Conclusion: Retropupillary iris claw IOL fixation is as safe as SFIOL for visual rehabilitation of post-cataract aphakia. Visual rehabilitation following iris claw IOL might take longer than SFIOL. Ovalization of the pupil is the commonest adverse effect reported with this type of IOL design.
RESUMEN
Background: Intertrochanteric and subtrochanteric fractures are leading cause of hospital admissions in elderly people. Aim: This study was done to analyze the surgical management of proximal third fractures of femur using Proximal Femoral Nail fixation. Materials and methods: 20 cases there were 15 male and 5 female patients of intertrochanteric and subtrochanteric fractures, which were treated with Proximal Femoral nail. Results: Mean age of 60.4 years. 50% of cases were admitted due to slip and fall and with slight predominance of right side. Out of 20 cases, 10 were trochanteric and 10 were subtrochanteric. In Trochanteric class 60% were Boyd and Griffin type 2, in Subtrochanteric class 40% were Seinsheimer type 3a and 20% were 2b. Mean duration of hospital stay is 19.33 days and mean time of full weight bearing is 12.6 weeks. Out of 20 cases 2 cases expired before first follow up and 1 case lost for follow up. Out of 17 remaining cases 9 were Trochanteric and 8 were Subtrochanteric. Good to excellent results are seen in 100% cases of trochanteric fractures and 87.5% cases of subtrochanteric fractures. Conclusion: We consider that PFN is an excellent implant for the treatment of proximal third fractures of femur.