应用水培茶树模式,采用透射电子显微镜(Transmission Electron Microscope,TEM)和X射线能谱仪(Energy Dispersive Spectrometer,EDS)相结合的手段,对铅盐水培茶树根、茎、叶细胞内Pb2+的累积部位与分布水平进行观测与分析。结果表明:茶...应用水培茶树模式,采用透射电子显微镜(Transmission Electron Microscope,TEM)和X射线能谱仪(Energy Dispersive Spectrometer,EDS)相结合的手段,对铅盐水培茶树根、茎、叶细胞内Pb2+的累积部位与分布水平进行观测与分析。结果表明:茶树根细胞中的铅均匀地分布于细胞壁上,且数量最多,质膜、细胞质和液泡膜上的铅较少,细胞间隙等部位的铅最少;嫩茎细胞壁中的铅颗粒小、数量多,质膜、液泡膜及叶绿体上数量较少;叶片细胞中的铅则主要分布在质膜和液泡膜上,细胞壁中的铅较少。展开更多
An extensively drug-resistant(XDR)Escherichia coli strain 258E was isolated from an anal swab sample of a chicken farm of Anhui province in China.Genomic analyses indicated that the strain 258E harbors an incompatibil...An extensively drug-resistant(XDR)Escherichia coli strain 258E was isolated from an anal swab sample of a chicken farm of Anhui province in China.Genomic analyses indicated that the strain 258E harbors an incompatibility group N(IncN)plasmid pEC258-3,which co-produces bla_(CTX-M-3),bla_(KPC-2),bla_(TEM-1B),qnrS1,aac(6')-Ib-cr,dfrA14,arr-3,and aac(6')-Ib3.Multiple genome arrangement analyses indicated that pEC258-3 is highly homologous with pCRKP-1-KPC discovered in Klebsiella pneumoniae from a patient.Furthermore,conjugation experiments proved that plasmid pEC258-3 can be transferred horizontally and may pose a significant potential threat in animals,community and hospital settings.展开更多
文摘应用水培茶树模式,采用透射电子显微镜(Transmission Electron Microscope,TEM)和X射线能谱仪(Energy Dispersive Spectrometer,EDS)相结合的手段,对铅盐水培茶树根、茎、叶细胞内Pb2+的累积部位与分布水平进行观测与分析。结果表明:茶树根细胞中的铅均匀地分布于细胞壁上,且数量最多,质膜、细胞质和液泡膜上的铅较少,细胞间隙等部位的铅最少;嫩茎细胞壁中的铅颗粒小、数量多,质膜、液泡膜及叶绿体上数量较少;叶片细胞中的铅则主要分布在质膜和液泡膜上,细胞壁中的铅较少。
基金the National Key Research and Development Program of China(2018YFE0192600)the Shanghai Agriculture Applied Technology Development Program,China(T20200104)+1 种基金the Fundamental Research Funds for the Central Universities,China(2020JB05)the Agricultural Science and Technology Innovation Program of Chinese Academy of Agricultural Sciences(CAAS-ZDRW202203).
文摘An extensively drug-resistant(XDR)Escherichia coli strain 258E was isolated from an anal swab sample of a chicken farm of Anhui province in China.Genomic analyses indicated that the strain 258E harbors an incompatibility group N(IncN)plasmid pEC258-3,which co-produces bla_(CTX-M-3),bla_(KPC-2),bla_(TEM-1B),qnrS1,aac(6')-Ib-cr,dfrA14,arr-3,and aac(6')-Ib3.Multiple genome arrangement analyses indicated that pEC258-3 is highly homologous with pCRKP-1-KPC discovered in Klebsiella pneumoniae from a patient.Furthermore,conjugation experiments proved that plasmid pEC258-3 can be transferred horizontally and may pose a significant potential threat in animals,community and hospital settings.
