提出了加速溶剂萃取-液相色谱法测定运动地坪材料中16种多环芳烃含量的方法。优化的加速溶剂萃取条件如下:①萃取溶剂为丙酮-正己烷(1+1)混合液;②萃取温度为100℃;③静态萃取时间5min;④循环萃取2次。以Hypersil Green PAH色谱柱为分离...提出了加速溶剂萃取-液相色谱法测定运动地坪材料中16种多环芳烃含量的方法。优化的加速溶剂萃取条件如下:①萃取溶剂为丙酮-正己烷(1+1)混合液;②萃取温度为100℃;③静态萃取时间5min;④循环萃取2次。以Hypersil Green PAH色谱柱为分离柱,用水和乙腈以不同比例混合的溶液为流动相进行梯度洗脱,用紫外检测器和荧光检测器测定。16种多环芳烃的质量浓度均在5.0~500.0μg·L^-1内与其对应的峰面积呈线性关系,检出限(3S/N)为0.04~1.67μg·kg^-1。以空白样品为基体进行加标回收试验,所得回收率为70.9%~117%,测定值的相对标准偏差(n=6)为1.5%~6.7%。展开更多
The effects of putrescine on improving rice growth under aluminum(Al)toxicity conditions have been previously demonstrated,however,the underlying mechanism remains unclear.In this study,treatment with 50 pmol/L Al sig...The effects of putrescine on improving rice growth under aluminum(Al)toxicity conditions have been previously demonstrated,however,the underlying mechanism remains unclear.In this study,treatment with 50 pmol/L Al significantly decreased rice root growth and whole rice dry weight,inhibited Ca2+uptake,decreased ATP syn thesis,and in creased Al,H2O2 and malon dialdehyde(MDA)con tents,whereas the application of putrescine mitigated these negative effects.Putrescine increased root growth and total dry weight of rice,reduced total Al content,decreased H2O2 and MDA contents by increasing antioxidant enzyme(superoxide dismutase,peroxidase,catalase and glutathione S・transferase)activities,increased Ca2+uptake and energy product!oru Proteomic analyses using data-independent acquisition successfully identified 7934 proteins,and 59 representative proteins exhibiting fold-change values higher than 1.5 were randomly selected.From the results of the proteomic and biochemical analyses,we found that putrescine significantly inhibited ethylene biosynthesis and phosphorus uptake in rice roots,increased pectin methylation,decreased pectin content and apoplastic Al deposit!on in rice roots.Putrescine also alleviated Al toxicity by repairing damaged DNA and increasing the proteins involved in maintaining plasma membra ne integrity and normal cell proliferation.These fin dings improve our understanding of how putrescine affects the rice response to Al toxicity,which will facilitate further studies on environmental protection,crop safety,in novations in rice performance and real-world producti on.展开更多
文摘提出了加速溶剂萃取-液相色谱法测定运动地坪材料中16种多环芳烃含量的方法。优化的加速溶剂萃取条件如下:①萃取溶剂为丙酮-正己烷(1+1)混合液;②萃取温度为100℃;③静态萃取时间5min;④循环萃取2次。以Hypersil Green PAH色谱柱为分离柱,用水和乙腈以不同比例混合的溶液为流动相进行梯度洗脱,用紫外检测器和荧光检测器测定。16种多环芳烃的质量浓度均在5.0~500.0μg·L^-1内与其对应的峰面积呈线性关系,检出限(3S/N)为0.04~1.67μg·kg^-1。以空白样品为基体进行加标回收试验,所得回收率为70.9%~117%,测定值的相对标准偏差(n=6)为1.5%~6.7%。
基金supported by the Zhejiang Provincial Natural Science Foundation of China(Grant No.LQ19C020007)the National Natural Science Foundation of China(Grant Nos.31901452,31771733,32001104 and 31872857)+2 种基金the Key Research and Development Program of Zhejiang Province,China(Grant No.2021C02002)the Open Project of State Key Laboratory of Rice Biology of China(Grant No.20190402)the Basic Research Foundation of National Commonweal Research Institute of China(Grant No.2017RG004-2).
文摘The effects of putrescine on improving rice growth under aluminum(Al)toxicity conditions have been previously demonstrated,however,the underlying mechanism remains unclear.In this study,treatment with 50 pmol/L Al significantly decreased rice root growth and whole rice dry weight,inhibited Ca2+uptake,decreased ATP syn thesis,and in creased Al,H2O2 and malon dialdehyde(MDA)con tents,whereas the application of putrescine mitigated these negative effects.Putrescine increased root growth and total dry weight of rice,reduced total Al content,decreased H2O2 and MDA contents by increasing antioxidant enzyme(superoxide dismutase,peroxidase,catalase and glutathione S・transferase)activities,increased Ca2+uptake and energy product!oru Proteomic analyses using data-independent acquisition successfully identified 7934 proteins,and 59 representative proteins exhibiting fold-change values higher than 1.5 were randomly selected.From the results of the proteomic and biochemical analyses,we found that putrescine significantly inhibited ethylene biosynthesis and phosphorus uptake in rice roots,increased pectin methylation,decreased pectin content and apoplastic Al deposit!on in rice roots.Putrescine also alleviated Al toxicity by repairing damaged DNA and increasing the proteins involved in maintaining plasma membra ne integrity and normal cell proliferation.These fin dings improve our understanding of how putrescine affects the rice response to Al toxicity,which will facilitate further studies on environmental protection,crop safety,in novations in rice performance and real-world producti on.
