Arbuscular mycorrhizae(AM)fungi form symbiotic associations with plant roots,providing nutritional benefits and promoting plant growth and defenses against various stresses.Metabolic changes in the roots during AM fun...Arbuscular mycorrhizae(AM)fungi form symbiotic associations with plant roots,providing nutritional benefits and promoting plant growth and defenses against various stresses.Metabolic changes in the roots during AM fungal colonization are key to understanding the development and maintenance of these symbioses.Here,we investigated metabolic changes in the roots of peanut(Arachis hypogaea L.)plants during the colonization and development of AM symbiosis,and compared them to uncolonized roots.The primary changes during the initial stage of AM colonization were in the contents and compositions of phenylpropanoid and flavonoid compounds.These compounds function in signaling pathways that regulate recognition,interactions,and pre-colonization between roots and AM fungi.Flavonoid compounds decreased by 25%when the symbiosis was fully established compared to the initial colonization stage.After AM symbiosis was established,general metabolism strongly shifted toward the formation of lipids,amino acids,carboxylic acids,and carbohydrates.Lipid compounds increased by 8.5%from the pre-symbiotic stage to well-established symbiosis.Lyso-phosphatidylcholines,which are signaling compounds,were only present in AM roots,and decreased in content after the symbiosis was established.In the initial stage of AM establishment,the content of salicylic acid increased two-fold,whereas jasmonic acid and abscisic acid decreased compared to uncolonized roots.The jasmonic acid content decreased in roots after the symbiosis was well established.AM symbiosis was associated with high levels of calcium,magnesium,and D-(+)-mannose,which stimulated seedling growth.Overall,specific metabolites that favor the establishment of AM symbiosis were common in the roots,primarily during early colonization,whereas general metabolism was strongly altered when AM symbiosis was well-established.In conclusion,specialized metabolites function as signaling compounds to establish AM symbiosis.These compounds are no longer produced after the symbiosis between the roots and AM becomes fully established.展开更多
目的分析门诊成人支气管哮喘患者的临床控制水平及其影响因素,为哮喘的规范化治疗提供参考。方法选取2017年7月至2022年7月上海中医药大学附属龙华医院呼吸科门诊就诊的100例成人哮喘患者,根据哮喘控制测试(asthma control test,ACT)评...目的分析门诊成人支气管哮喘患者的临床控制水平及其影响因素,为哮喘的规范化治疗提供参考。方法选取2017年7月至2022年7月上海中医药大学附属龙华医院呼吸科门诊就诊的100例成人哮喘患者,根据哮喘控制测试(asthma control test,ACT)评分表评估患者哮喘控制水平,将患者分为控制良好组(n=36)与未控制组(n=64)。采用多因素Logistic回归分析门诊成人支气管哮喘患者控制水平的影响因素。结果100例门诊成人支气管哮喘患者的控制率(ACT≥20分)为36%。单因素Logistic回归分析显示两组患者的性别、年龄、吸烟史、家族史、急性加重住院史、合并过敏性鼻窦炎、肺功能等差异无统计学意义(P>0.05)。两组患者的BMI、FeNO、嗜酸性粒细胞计数以及嗜酸性粒细胞百分比差异具有统计学意义(P<0.05)。多因素Logistic回归分析显示,有吸烟史、发病年龄≤33岁、FeNO>54ppb、血嗜酸性粒细胞百分比>5.5%是影响门诊成人支气管哮喘患者控制水平的危险因素(P<0.05)。ROC曲线分析显示,以Logistic回归分析总体模型为检验变量时,曲线下面积最大(0.778)。结论门诊成人支气管哮喘患者控制水平未达理想标准。有吸烟史、发病年龄小、FeNO水平高、血嗜酸粒细胞百分比高是影响门诊成人支气管哮喘患者控制水平的危险因素。展开更多
基金supported by the National Key R&D Program of China(2022YFD1000105)the Key R&D Program of Shandong Province,China(2021CXGC010804)+5 种基金the Taishan Scholars Project,China(202211275)the Youth Found of Shandong Natural Science Foundation,China(ZR2021QC163)the Natural Science Foundation of Shandong Province,China(ZR2020MC094)the Strategic Academic Leadership Program“Priority 2030”of the Kazan Federal University,Russiathe RUDN University Strategic Academic Leadership Program,Chinathe 2022 High-level Talent Innovation and Entrepreneurship(Platform)Project of Linyi,China。
文摘Arbuscular mycorrhizae(AM)fungi form symbiotic associations with plant roots,providing nutritional benefits and promoting plant growth and defenses against various stresses.Metabolic changes in the roots during AM fungal colonization are key to understanding the development and maintenance of these symbioses.Here,we investigated metabolic changes in the roots of peanut(Arachis hypogaea L.)plants during the colonization and development of AM symbiosis,and compared them to uncolonized roots.The primary changes during the initial stage of AM colonization were in the contents and compositions of phenylpropanoid and flavonoid compounds.These compounds function in signaling pathways that regulate recognition,interactions,and pre-colonization between roots and AM fungi.Flavonoid compounds decreased by 25%when the symbiosis was fully established compared to the initial colonization stage.After AM symbiosis was established,general metabolism strongly shifted toward the formation of lipids,amino acids,carboxylic acids,and carbohydrates.Lipid compounds increased by 8.5%from the pre-symbiotic stage to well-established symbiosis.Lyso-phosphatidylcholines,which are signaling compounds,were only present in AM roots,and decreased in content after the symbiosis was established.In the initial stage of AM establishment,the content of salicylic acid increased two-fold,whereas jasmonic acid and abscisic acid decreased compared to uncolonized roots.The jasmonic acid content decreased in roots after the symbiosis was well established.AM symbiosis was associated with high levels of calcium,magnesium,and D-(+)-mannose,which stimulated seedling growth.Overall,specific metabolites that favor the establishment of AM symbiosis were common in the roots,primarily during early colonization,whereas general metabolism was strongly altered when AM symbiosis was well-established.In conclusion,specialized metabolites function as signaling compounds to establish AM symbiosis.These compounds are no longer produced after the symbiosis between the roots and AM becomes fully established.
文摘目的分析门诊成人支气管哮喘患者的临床控制水平及其影响因素,为哮喘的规范化治疗提供参考。方法选取2017年7月至2022年7月上海中医药大学附属龙华医院呼吸科门诊就诊的100例成人哮喘患者,根据哮喘控制测试(asthma control test,ACT)评分表评估患者哮喘控制水平,将患者分为控制良好组(n=36)与未控制组(n=64)。采用多因素Logistic回归分析门诊成人支气管哮喘患者控制水平的影响因素。结果100例门诊成人支气管哮喘患者的控制率(ACT≥20分)为36%。单因素Logistic回归分析显示两组患者的性别、年龄、吸烟史、家族史、急性加重住院史、合并过敏性鼻窦炎、肺功能等差异无统计学意义(P>0.05)。两组患者的BMI、FeNO、嗜酸性粒细胞计数以及嗜酸性粒细胞百分比差异具有统计学意义(P<0.05)。多因素Logistic回归分析显示,有吸烟史、发病年龄≤33岁、FeNO>54ppb、血嗜酸性粒细胞百分比>5.5%是影响门诊成人支气管哮喘患者控制水平的危险因素(P<0.05)。ROC曲线分析显示,以Logistic回归分析总体模型为检验变量时,曲线下面积最大(0.778)。结论门诊成人支气管哮喘患者控制水平未达理想标准。有吸烟史、发病年龄小、FeNO水平高、血嗜酸粒细胞百分比高是影响门诊成人支气管哮喘患者控制水平的危险因素。
