该研究建立了芦蒿废弃茎叶的UPLC指纹图谱及5个酚酸类成分的一测多评法(quantitative analysis of multi-components by single marker,QAMS)。采用Waters Acquity UPLC BEH C_(18)色谱柱(2.1 mm×100 mm,1.7μm),流动相为0.1%磷酸...该研究建立了芦蒿废弃茎叶的UPLC指纹图谱及5个酚酸类成分的一测多评法(quantitative analysis of multi-components by single marker,QAMS)。采用Waters Acquity UPLC BEH C_(18)色谱柱(2.1 mm×100 mm,1.7μm),流动相为0.1%磷酸水-乙腈,梯度洗脱,流速0.3 mL·min^(-1),检测波长330 nm,柱温30℃,进样量2μL。对指纹图谱的数据进行相似度评价及聚类分析,确定13批次芦蒿废弃茎叶中的15个共有成分。以绿原酸为内参物,分别计算阿魏酸、异绿原酸A、异绿原酸B、异绿原酸C的相对校正因子,实现了芦蒿废弃茎叶中5个成分含量测定的一测多评法的建立。同时采用外标法测定此5个成分的含量,结果显示一测多评法与外标法测定结果无显著性差异。结果表明,不同品种和不同产地的芦蒿废弃茎叶中的酚酸类成分含量存在明显差异,且木质化后的芦蒿废弃物中的酚酸类含量较未木质化显著提升。综上所述,该研究建立的芦蒿废弃茎叶一测多评法能够快速准确、简便经济地用于芦蒿废弃茎叶中5个酚酸成分的含量测定,为芦蒿废弃茎叶的资源化开发利用奠定了基础。展开更多
A greenhouse experiment was conducted to elucidate the growth changes and tissues anatomical characteristics of giant reed(Arundo donax L.),a perennial rhizomatous grass,which was cultivated for 70 d in soils contamin...A greenhouse experiment was conducted to elucidate the growth changes and tissues anatomical characteristics of giant reed(Arundo donax L.),a perennial rhizomatous grass,which was cultivated for 70 d in soils contaminated with As,Cd and Pb.The results show that giant reed rapidly grows with big biomass of shoots in contaminated soil,possessing strong metal-tolerance with limited metal translocation from roots to shoots.When As,Cd and Pb concentrations in the soil are less than 254,76.1 and 1 552 mg/kg,respectively,plant height and dried biomass are slightly reduced,the accumulation of As,Cd and Pb in shoots of giant reed is low while metal concentration in roots is high,and the anatomical characteristics of stem tissues are thick and homogeneous according to SEM images.However,plant height and dried biomass are significantly reduced and metal concentration in plant shoots and roots are significantly increased(P<0.05),the stems images become heterogeneous and the secretion in vascular bundles increases significantly when As,Cd and Pb concentrations in the soil exceed 334,101 and 2 052 mg/kg,respectively.The giant reed is a promising,naturally occurring plant with strong metal-tolerance,which can be cultivated in soils contaminated with multiple metals for ecoremediation purposes.展开更多
A set of field experiments was conducted to investigate the effects of reed rootstocks on hydraulic properties of surface soils in the Shuangtai Estuary Wetland, Northeast China. The soil particle size distribution an...A set of field experiments was conducted to investigate the effects of reed rootstocks on hydraulic properties of surface soils in the Shuangtai Estuary Wetland, Northeast China. The soil particle size distribution and rootstock content were analyzed, and the vertical soil water profile was monitored by using a multisensory capacitance system. Hydraulic conductivity of the surface soil layer was estimated by in si-tu infiltration. The soil was silt loam with less sand; soil texture was consistent though the vertical profile, but bulk density was lower in the upper 20 era, where the fine roots were concentrated. The surface soil moisture profile changed dynamically, and variation in vertically integrated soil moisture was consistent with observed precipitation and estimated evaporation. Infiltration capacity was 30 cm＇d＂~, much larger than typical hydraulic conductivity values for silt loam with less sand. These findings suggest that fine annual roots change the soil matrix and hydraulic conductivity in surface soils. A vertical one-dimensional water transport model was presented based on Richard＇s equation. Model parameters were estimated from the soil analyses and literature data. The computation accurately reproduced the dynamic changes in moisture in surface soils containing large volumes of fine rootstock.展开更多
文摘该研究建立了芦蒿废弃茎叶的UPLC指纹图谱及5个酚酸类成分的一测多评法(quantitative analysis of multi-components by single marker,QAMS)。采用Waters Acquity UPLC BEH C_(18)色谱柱(2.1 mm×100 mm,1.7μm),流动相为0.1%磷酸水-乙腈,梯度洗脱,流速0.3 mL·min^(-1),检测波长330 nm,柱温30℃,进样量2μL。对指纹图谱的数据进行相似度评价及聚类分析,确定13批次芦蒿废弃茎叶中的15个共有成分。以绿原酸为内参物,分别计算阿魏酸、异绿原酸A、异绿原酸B、异绿原酸C的相对校正因子,实现了芦蒿废弃茎叶中5个成分含量测定的一测多评法的建立。同时采用外标法测定此5个成分的含量,结果显示一测多评法与外标法测定结果无显著性差异。结果表明,不同品种和不同产地的芦蒿废弃茎叶中的酚酸类成分含量存在明显差异,且木质化后的芦蒿废弃物中的酚酸类含量较未木质化显著提升。综上所述,该研究建立的芦蒿废弃茎叶一测多评法能够快速准确、简便经济地用于芦蒿废弃茎叶中5个酚酸成分的含量测定,为芦蒿废弃茎叶的资源化开发利用奠定了基础。
基金Project(20507022) supported by the National Natural Science Foundation of China
文摘A greenhouse experiment was conducted to elucidate the growth changes and tissues anatomical characteristics of giant reed(Arundo donax L.),a perennial rhizomatous grass,which was cultivated for 70 d in soils contaminated with As,Cd and Pb.The results show that giant reed rapidly grows with big biomass of shoots in contaminated soil,possessing strong metal-tolerance with limited metal translocation from roots to shoots.When As,Cd and Pb concentrations in the soil are less than 254,76.1 and 1 552 mg/kg,respectively,plant height and dried biomass are slightly reduced,the accumulation of As,Cd and Pb in shoots of giant reed is low while metal concentration in roots is high,and the anatomical characteristics of stem tissues are thick and homogeneous according to SEM images.However,plant height and dried biomass are significantly reduced and metal concentration in plant shoots and roots are significantly increased(P<0.05),the stems images become heterogeneous and the secretion in vascular bundles increases significantly when As,Cd and Pb concentrations in the soil exceed 334,101 and 2 052 mg/kg,respectively.The giant reed is a promising,naturally occurring plant with strong metal-tolerance,which can be cultivated in soils contaminated with multiple metals for ecoremediation purposes.
文摘A set of field experiments was conducted to investigate the effects of reed rootstocks on hydraulic properties of surface soils in the Shuangtai Estuary Wetland, Northeast China. The soil particle size distribution and rootstock content were analyzed, and the vertical soil water profile was monitored by using a multisensory capacitance system. Hydraulic conductivity of the surface soil layer was estimated by in si-tu infiltration. The soil was silt loam with less sand; soil texture was consistent though the vertical profile, but bulk density was lower in the upper 20 era, where the fine roots were concentrated. The surface soil moisture profile changed dynamically, and variation in vertically integrated soil moisture was consistent with observed precipitation and estimated evaporation. Infiltration capacity was 30 cm＇d＂~, much larger than typical hydraulic conductivity values for silt loam with less sand. These findings suggest that fine annual roots change the soil matrix and hydraulic conductivity in surface soils. A vertical one-dimensional water transport model was presented based on Richard＇s equation. Model parameters were estimated from the soil analyses and literature data. The computation accurately reproduced the dynamic changes in moisture in surface soils containing large volumes of fine rootstock.
