Effects of Exogenous NO on Active Oxygen Metabolism in Cucumber Seedlings under NaCl Stress

Employing nutrient solution hydroponic method,the effects of exogenous nitric oxide（NO）on the growth and active oxygen metabolism in cucumber（Cucumis sativus L.）seedlings under NaCl stress were investigated.The results indicated that NaCl treatment significantly inhibited the growth of cucumber seedlings,while exogenous NO could significantly alleviate the inhibitory effects of NaCl stress on seedling growth.Especially,0.1 mmol/L SNP treatment exhibited better effects than 0.5 mmol/L SNP treatment on alleviating NaCl stress.Under 0.1 mmol/L NaCl stress,adding 0.1 mmol/L exogenous NO could significantly decrease the generation rate of O·-2and MDA content,significantly improve soluble protein content and enhance the activities of SOD,POD and CAT,thus reducing the damage of salt stress to cucumber seedlings.

Endoscopically controlled surgery with open hemilaminectomy for the treatment of intradural extramedullary tumors:an operative technique and short-term outcomes of 20 consecutive cases

Background:To present a surgical technique for the treatment of intradural extramedullary(IDEM)tumors by using endoscopically controlled surgery with open hemilaminectomy technique.Methods:In this study,20 patients with 22 IDEM tumors were enrolled.An endoscopically controlled surgery with open hemilaminectomy was employed to remove the tumors.Data related to clinical symptoms and medical images before and after surgery were collected for perioperative evaluation and follow-up analysis.Results:All the tumors in 20 patients were well removed.The clinical symptoms were significantly reduced in all the patients as well.The short-term follow-up data showed that there was no tumor recurrence or spinal deformity.Conclusion:The endoscopically controlled surgery with open hemilaminectomy technique provided favorable exposure and satisfactory resection to the IDEM tumors.It may be an effective surgical method for treating IDEM tumors.Larger samples and longer follow-up data are needed to verify its long-term effectiveness.