Genetic improvement has promoted wheat’s grain yield and nitrogen use efficiency(NUE)during the past decades.Therefore,the current wheat cultivars exhibit higher grain yield and NUE than previous cultivars in the Yan...Genetic improvement has promoted wheat’s grain yield and nitrogen use efficiency(NUE)during the past decades.Therefore,the current wheat cultivars exhibit higher grain yield and NUE than previous cultivars in the Yangtze River Basin,China since the 2000s.However,the critical traits and mechanisms of the increased grain yield and NUE remain unknown.This study explores the mechanisms underlying these new cultivars’increased grain yield and NUE by studying 21 local cultivars cultivated for three growing seasons from 2016 to 2019.Significantly positive correlations were observed between grain yield and NUE in the three years.The cultivars were grouped into high(HH),medium(MM),and low(LL)grain yield and NUE groups.The HH group exhibited significantly high grain yield and NUE.High grain yield was attributed to more effective ears by high tiller fertility and greater single-spike yield by increasing post-anthesis single-stem biomass.Compared to other groups,the HH group demonstrated a longer leaf stay-green ability and a greater flag leaf photosynthetic rate after anthesis.It also showed higher N accumulation at pre-anthesis,which contributed to increasing N accumulation per stem,including stem and leaf sheath,leaf blade,and unit leaf area at pre-anthesis,and promoting N uptake efficiency,the main contribution of high NUE.Moreover,tiller fertility was positively related to N accumulation per stem,N accumulation per unit leaf area,leaf stay-green ability,and flag leaf photosynthetic rate,which indicates that improving tiller fertility promoted N uptake,leaf N accumulation,and photosynthetic ability,thereby achieving synchronous improvements in grain yield and NUE.Therefore,tiller fertility is proposed as an important kernel indicator that can be used in the breeding and management of cultivars to improve agricultural efficiency and sustainability.展开更多
目的调查老年急性心肌梗死患者抑郁状况并探讨其影响因素。方法入选2021年6月至2022年9月在辽宁省健康产业集团抚矿总医院住院的182例老年急性心肌梗死患者,应用老年抑郁量表对其抑郁情况进行评估;收集患者一般资料及总胆红素(Total bil...目的调查老年急性心肌梗死患者抑郁状况并探讨其影响因素。方法入选2021年6月至2022年9月在辽宁省健康产业集团抚矿总医院住院的182例老年急性心肌梗死患者,应用老年抑郁量表对其抑郁情况进行评估;收集患者一般资料及总胆红素(Total bilirubin,T-BIL)、直接胆红素(Direct bilirubin,D-BIL)、总胆固醇(Total Bilirubin,TG)、高密度脂蛋白胆固醇(High Density Lipoprotein Cholesterol,HDL-C)、低密度脂蛋白胆固醇(Low Density Lipoprotein Cholesterol,LDL-C)、非高密度脂蛋白胆固醇(Non High Density Lipoprotein Cholesterol,Non-HDL-C)、甘油三酯(Total Bilirubin,TG)等生化结果,分析其与抑郁状态的相关性。结果抑郁阳性患者73例,占40.1%。抑郁组患者中女性、空巢老人、TG、Non-HDL-C与非抑郁组比较,差异具有统计学意义(P<0.05)。GDS-30评分与TC、TG、LDL-C、Non-HDL-C、Gensini评分具有正相关(P<0.05)。结论老年急性心肌梗死患者抑郁发生率高(40.1%),女性、空巢老人、TG及Non-HDL-C水平升高是老年急性心肌梗死合并抑郁的危险因素。展开更多
基金supported by the National Natural Science Foundation of China(31771711 and 32071953)the National Key Research and Development Program of China(2016YFD0300405)+1 种基金the Priority Academic Program Development of Jiangsu Higher Education Institutions,China,the Project of the Vice General Manager of Science and Technology of Jiangsu Province,China(FZ20211472)the Plan of Gathering 1000 Leading Talents of Suqian,China.
文摘Genetic improvement has promoted wheat’s grain yield and nitrogen use efficiency(NUE)during the past decades.Therefore,the current wheat cultivars exhibit higher grain yield and NUE than previous cultivars in the Yangtze River Basin,China since the 2000s.However,the critical traits and mechanisms of the increased grain yield and NUE remain unknown.This study explores the mechanisms underlying these new cultivars’increased grain yield and NUE by studying 21 local cultivars cultivated for three growing seasons from 2016 to 2019.Significantly positive correlations were observed between grain yield and NUE in the three years.The cultivars were grouped into high(HH),medium(MM),and low(LL)grain yield and NUE groups.The HH group exhibited significantly high grain yield and NUE.High grain yield was attributed to more effective ears by high tiller fertility and greater single-spike yield by increasing post-anthesis single-stem biomass.Compared to other groups,the HH group demonstrated a longer leaf stay-green ability and a greater flag leaf photosynthetic rate after anthesis.It also showed higher N accumulation at pre-anthesis,which contributed to increasing N accumulation per stem,including stem and leaf sheath,leaf blade,and unit leaf area at pre-anthesis,and promoting N uptake efficiency,the main contribution of high NUE.Moreover,tiller fertility was positively related to N accumulation per stem,N accumulation per unit leaf area,leaf stay-green ability,and flag leaf photosynthetic rate,which indicates that improving tiller fertility promoted N uptake,leaf N accumulation,and photosynthetic ability,thereby achieving synchronous improvements in grain yield and NUE.Therefore,tiller fertility is proposed as an important kernel indicator that can be used in the breeding and management of cultivars to improve agricultural efficiency and sustainability.
文摘目的调查老年急性心肌梗死患者抑郁状况并探讨其影响因素。方法入选2021年6月至2022年9月在辽宁省健康产业集团抚矿总医院住院的182例老年急性心肌梗死患者,应用老年抑郁量表对其抑郁情况进行评估;收集患者一般资料及总胆红素(Total bilirubin,T-BIL)、直接胆红素(Direct bilirubin,D-BIL)、总胆固醇(Total Bilirubin,TG)、高密度脂蛋白胆固醇(High Density Lipoprotein Cholesterol,HDL-C)、低密度脂蛋白胆固醇(Low Density Lipoprotein Cholesterol,LDL-C)、非高密度脂蛋白胆固醇(Non High Density Lipoprotein Cholesterol,Non-HDL-C)、甘油三酯(Total Bilirubin,TG)等生化结果,分析其与抑郁状态的相关性。结果抑郁阳性患者73例,占40.1%。抑郁组患者中女性、空巢老人、TG、Non-HDL-C与非抑郁组比较,差异具有统计学意义(P<0.05)。GDS-30评分与TC、TG、LDL-C、Non-HDL-C、Gensini评分具有正相关(P<0.05)。结论老年急性心肌梗死患者抑郁发生率高(40.1%),女性、空巢老人、TG及Non-HDL-C水平升高是老年急性心肌梗死合并抑郁的危险因素。
