Chinese chive usually develops an off-flavor after a short storage time. To explore effective ways to maintain the postharvest quality of Chinese chive, the effect of exogenous application of 6-benzylaminopurine（6-BA...Chinese chive usually develops an off-flavor after a short storage time. To explore effective ways to maintain the postharvest quality of Chinese chive, the effect of exogenous application of 6-benzylaminopurine（6-BA） on postharvest quality and antioxidant activity of chive was evaluated, and the mechanism of the physiological responses of chive to 6-BA treatment was explored. Chives were sprayed for 10 min with 100, 300, or 500 mg L–1 6-BA or with alkaline solution as the control, then stored at（2±1）°C with a relative humidity（RH） of 80–85%. We found that 300 mg L–1 6-BA significantly delayed yellowing and chlorophyll degradation, maintained the total phenolic and flavonoid content, and improved the activities of antioxidant enzymes, including superoxide dismutase（SOD）, catalase（CAT） and peroxidase（POD）. In conclusion, we identified exogenous application of 6-BA as an effective method for maintaining postharvest quality of Chinese chive. In addition, our finding that the activities of antioxidant enzymes increase in response to exogenous 6-BA provides new insights into the mechanism of cytokinin-based postharvest fresh-keeping.展开更多
目的:探讨自体富血小板血浆(platelet-rich plasma,PRP)关节腔注射联合坚骨胶囊口服在自体骨软骨移植手术治疗HeppleⅤ型距骨骨软骨损伤(osteochondral lesion of the talus,OLT)中的应用价值。方法:2021年1月至2023年1月,纳入45例Heppl...目的:探讨自体富血小板血浆(platelet-rich plasma,PRP)关节腔注射联合坚骨胶囊口服在自体骨软骨移植手术治疗HeppleⅤ型距骨骨软骨损伤(osteochondral lesion of the talus,OLT)中的应用价值。方法:2021年1月至2023年1月,纳入45例HeppleⅤ型OLT患者。男26例,女19例;年龄22~39岁,中位数31岁。左侧20例,右侧25例。采用自体骨软骨移植手术治疗,术后经踝关节内侧间隙向关节腔内注射5 mL自体PRP,并于术后第1天开始服用坚骨胶囊,每次5粒,每日3次,连续服用1个月。记录术前、术后3个月踝关节疼痛视觉模拟量表(visual analogue scale,VAS)评分、踝关节活动度、美国足与踝关节协会(American Orthopaedic Foot and Ankle Society,AOFAS)踝与后足评分及转化生长因子(transforming growth factor,TGF)-β1、血管内皮生长因子(vascular endothelial growth factor,VEGF)血清含量。结果:45例患者均顺利完成治疗。均获3个月以上随访。踝关节疼痛VAS评分,术前(7.69±1.16)分,术后3个月(2.47±0.26)分;踝关节活动度,术前42.14°±4.38°,术后3个月63.62°±6.41°;AOFAS踝与后足评分,术前(66.73±6.17)分,术后3个月(91.27±4.18)分;TGF-β1血清含量,术前(214.36±18.34)ng·mL^(-1),术后3个月(36.47±4.55)ng·mL^(-1);VEGF血清含量,术前(129.76±11.37)ng·mL^(-1),术后3个月(281.36±19.75)ng·mL^(-1)。结论:在自体骨软骨移植手术后应用自体PRP关节腔注射联合坚骨胶囊口服治疗HeppleⅤ型OLT,能够缓解踝关节疼痛、改善踝关节功能、促进软骨损伤修复。展开更多
基金financially supported by the Innovation Capacity Building Projects of Beijing Academy of Agriculturaland Forestry Sciences,China (KJCX20140205)the Innovation Capacity Building Projects of Beijing Academy of Agricultural and Forestry Sciences, China (KJCX20140408)
文摘Chinese chive usually develops an off-flavor after a short storage time. To explore effective ways to maintain the postharvest quality of Chinese chive, the effect of exogenous application of 6-benzylaminopurine（6-BA） on postharvest quality and antioxidant activity of chive was evaluated, and the mechanism of the physiological responses of chive to 6-BA treatment was explored. Chives were sprayed for 10 min with 100, 300, or 500 mg L–1 6-BA or with alkaline solution as the control, then stored at（2±1）°C with a relative humidity（RH） of 80–85%. We found that 300 mg L–1 6-BA significantly delayed yellowing and chlorophyll degradation, maintained the total phenolic and flavonoid content, and improved the activities of antioxidant enzymes, including superoxide dismutase（SOD）, catalase（CAT） and peroxidase（POD）. In conclusion, we identified exogenous application of 6-BA as an effective method for maintaining postharvest quality of Chinese chive. In addition, our finding that the activities of antioxidant enzymes increase in response to exogenous 6-BA provides new insights into the mechanism of cytokinin-based postharvest fresh-keeping.
