Simultaneous stresses of salinity and drought often coincide during rice-growing seasons in saline lands,primarily due to insufficient water resources and inadequate irrigation facilities.Consequently,combined salinit...Simultaneous stresses of salinity and drought often coincide during rice-growing seasons in saline lands,primarily due to insufficient water resources and inadequate irrigation facilities.Consequently,combined salinity-drought stress poses a major threat to rice production.In this study,two salinity levels(NS,non-salinity;HS,high salinity)along with three drought treatments(CC,control condition;DJ,drought stress imposed at jointing;DH,drought stress imposed at heading)were performed to investigate their combined influences on leaf photosynthetic characteristics,biomass accumulation,and rice yield formation.Salinity,drought,and their combination led to a shortened growth period from heading to maturity,resulting in a reduced overall growth duration.Grain yield was reduced under both salinity and drought stress,with a more substantial reduction under the combined salinity-drought stress.The combined stress imposed at heading caused greater yield losses in rice compared with the stress imposed at jointing.Additionally,the combined salinity-drought stress induced greater decreases in shoot biomass accumulation from heading to maturity,as well as in shoot biomass and nonstructural carbohydrate(NSC)content in the stem at heading and maturity.However,it increased the harvest index and NSC remobilization reserve.Salinity and drought reduced the leaf area index and SPAD value of flag leaves and weakened the leaf photosynthetic characteristics as indicated by lower photosynthetic rates,transpiration rates,and stomatal conductance.These reductions were more pronounced under the combined stress.Salinity,drought,and especially their combination,decreased the activities of ascorbate peroxidase,catalase,and superoxide dismutase,while increasing the contents of malondialdehyde,hydrogen peroxide,and superoxide radical.Our results indicated a more significant yield loss in rice when subjected to combined salinity-drought stress.The individual and combined stresses of salinity and drought diminished antioxidant enzyme activities,inhibited leaf photosynthetic functions,accelerated leaf senescence,and subsequently lowered assimilate accumulation and grain yield.展开更多
目的:分析中医推拿结合针刺治疗对神经根型颈椎病的疗效。方法:对2018年1月-2019年10月我院康复医学科门诊及病房收治的神经根型颈椎病患者共48例进行研究,经均等双盲划分法将其中24例纳入对照组(仅予以针刺治疗),剩余24例纳入观察组(...目的:分析中医推拿结合针刺治疗对神经根型颈椎病的疗效。方法:对2018年1月-2019年10月我院康复医学科门诊及病房收治的神经根型颈椎病患者共48例进行研究,经均等双盲划分法将其中24例纳入对照组(仅予以针刺治疗),剩余24例纳入观察组(于对照组前提下加以推拿),观察两组的治疗有效率和治疗前后颈椎功能障碍指数(Neck Disability Index,NDI)、田中靖久20分量表、疼痛视觉模拟评分表(Visual Analogue Score,VAS)及健康状况调查简表(The Mos Item Short From 36 Health Survey,SF-36)评分。结果:观察组的治疗有效率比对照组更高(P<0.05)。治疗前,两组NDI、田中靖久20分量表、VAS及SF-36评分差异不显著(P>0.05);治疗后,观察组NDI及VAS评分比对照组更低,田中靖久20分量表及SF-36评分比对照组更高(P<0.05)。结论:中医推拿结合针刺治疗对神经根型颈椎病疗效明显,能改善临床症状及颈椎功能,减轻其疼痛程度,提升其生活质量,值得推广应用。展开更多
基金financed by the National Key Research and Development Program,China(Grant Nos.2022YFE0113400 and 2022YFD1500402)National Natural Science Foundation of China(Grant No.32001466)+3 种基金Scientific and Technological Innovation Fund of Carbon Emissions Peak and Neutrality of Jiangsu Provincial Department of Science and Technology,China(Grant Nos.BE2022304 and BE2022305)Joints Funds of the National Natural Science Foundation of China(Grant No.U20A2022)Postdoctoral Research Foundation of China(Grant No.2020M671628)the Priority Academic Program Development of Jiangsu Higher Education Institutions,China.
文摘Simultaneous stresses of salinity and drought often coincide during rice-growing seasons in saline lands,primarily due to insufficient water resources and inadequate irrigation facilities.Consequently,combined salinity-drought stress poses a major threat to rice production.In this study,two salinity levels(NS,non-salinity;HS,high salinity)along with three drought treatments(CC,control condition;DJ,drought stress imposed at jointing;DH,drought stress imposed at heading)were performed to investigate their combined influences on leaf photosynthetic characteristics,biomass accumulation,and rice yield formation.Salinity,drought,and their combination led to a shortened growth period from heading to maturity,resulting in a reduced overall growth duration.Grain yield was reduced under both salinity and drought stress,with a more substantial reduction under the combined salinity-drought stress.The combined stress imposed at heading caused greater yield losses in rice compared with the stress imposed at jointing.Additionally,the combined salinity-drought stress induced greater decreases in shoot biomass accumulation from heading to maturity,as well as in shoot biomass and nonstructural carbohydrate(NSC)content in the stem at heading and maturity.However,it increased the harvest index and NSC remobilization reserve.Salinity and drought reduced the leaf area index and SPAD value of flag leaves and weakened the leaf photosynthetic characteristics as indicated by lower photosynthetic rates,transpiration rates,and stomatal conductance.These reductions were more pronounced under the combined stress.Salinity,drought,and especially their combination,decreased the activities of ascorbate peroxidase,catalase,and superoxide dismutase,while increasing the contents of malondialdehyde,hydrogen peroxide,and superoxide radical.Our results indicated a more significant yield loss in rice when subjected to combined salinity-drought stress.The individual and combined stresses of salinity and drought diminished antioxidant enzyme activities,inhibited leaf photosynthetic functions,accelerated leaf senescence,and subsequently lowered assimilate accumulation and grain yield.
文摘目的:分析中医推拿结合针刺治疗对神经根型颈椎病的疗效。方法:对2018年1月-2019年10月我院康复医学科门诊及病房收治的神经根型颈椎病患者共48例进行研究,经均等双盲划分法将其中24例纳入对照组(仅予以针刺治疗),剩余24例纳入观察组(于对照组前提下加以推拿),观察两组的治疗有效率和治疗前后颈椎功能障碍指数(Neck Disability Index,NDI)、田中靖久20分量表、疼痛视觉模拟评分表(Visual Analogue Score,VAS)及健康状况调查简表(The Mos Item Short From 36 Health Survey,SF-36)评分。结果:观察组的治疗有效率比对照组更高(P<0.05)。治疗前,两组NDI、田中靖久20分量表、VAS及SF-36评分差异不显著(P>0.05);治疗后,观察组NDI及VAS评分比对照组更低,田中靖久20分量表及SF-36评分比对照组更高(P<0.05)。结论:中医推拿结合针刺治疗对神经根型颈椎病疗效明显,能改善临床症状及颈椎功能,减轻其疼痛程度,提升其生活质量,值得推广应用。
