The biology safety of genetically modified organisms （GMO） has been a topic of considerable public debate in recent years. Parts of the international research on the safety of GMO focus on its effect on soil ecosyst...The biology safety of genetically modified organisms （GMO） has been a topic of considerable public debate in recent years. Parts of the international research on the safety of GMO focus on its effect on soil ecosystem, especially on microbial communities changing and process in soil that are essential to key terrestrial ecosystem functions. This paper studied the dynamic change of soil microbe after cultivating Roundup Ready soybean （RRS） and the effect on biochemical processing of nitrogen cycle. According to the variance analysis, the ammonifying bacteria and nitrifying bacteria quantities of RRS in the rhizosphere soil were much lower than that of other genotype soybeans. The effects of different genotype soybeans on ammoniation intensity and nitrification intensity were remarkable. The nitrification intensity and the nitrifying bacteria had the great positive correlation and sustainable development.展开更多
Maximizing NO3 uptake during seedling development is important as it has a major influence on plant growth and yield. However, little is known about the processes leading to, and involved in, the initiation of root NO...Maximizing NO3 uptake during seedling development is important as it has a major influence on plant growth and yield. However, little is known about the processes leading to, and involved in, the initiation of root NO3 uptake capacity in developing seedlings. This study examines the physiological processes involved in root NO3 uptake and metabolism, to gain an understanding of how the NO3 uptake system responds to meet demand as maize seedlings transition from seed N use to external N capture. The concentrations of seedderived free amino acids within root and shoot tissues are initially high, but decrease rapidly until stabilizing eight days after imbibition （DAI）. Similarly, shoot N% decreases, but does not stabilize until 12-13 DAI. Following the decrease in free amino acid concentrations, root NO3- uptake capacity increases until shoot N% stabilizes. The increase in root NO3 uptake capacity corresponds with a rapid rise in transcript levels of putative NO3 transporters, ZmNRT2.1 and ZmNRT2.2. The processes underlying the increase in root NO3- uptake capacity to meet N demand provide an insight into the processes controlling N uptake.展开更多
The rational design of earth-abundant catalysts with excellent water splitting activities is important to obtain clean fuels for sustainable energy devices. In this study, mixed transition metal oxide nanoparticles en...The rational design of earth-abundant catalysts with excellent water splitting activities is important to obtain clean fuels for sustainable energy devices. In this study, mixed transition metal oxide nanoparticles encapsulated in nitrogendoped carbon （denoted as AB2O4@NC） were developed using a one-pot protocol, wherein a metal-organic complex was adopted as the precursor. As a proof of concept, MnCo2O4@NC was used as an electrocatalyst for water oxidation, and demonstrated an outstanding electrocatalytic activity with low overpotential to achieve a current density of 10 mA·cm^-1 0/10 = 287 mV）, small Tafel slope （55 mV·dec^-1）, and high stability （96% retention after 20 h）. The excellent electrochemical performance benefited from the synergistic effects of the MnCo2O4 nanoparticles and nitrogen-doped carbon, as well as the assembled mesoporous nanowire structure. Finally, a highly stable all-solid-state supercapacitor based on MnCo2O4@NC was demonstrated （1.5% decay after 10,000 cycles）.展开更多
基金Supported by Natural Science Foundation of Heilongjiang Province(04-0402:ZJN)
文摘The biology safety of genetically modified organisms （GMO） has been a topic of considerable public debate in recent years. Parts of the international research on the safety of GMO focus on its effect on soil ecosystem, especially on microbial communities changing and process in soil that are essential to key terrestrial ecosystem functions. This paper studied the dynamic change of soil microbe after cultivating Roundup Ready soybean （RRS） and the effect on biochemical processing of nitrogen cycle. According to the variance analysis, the ammonifying bacteria and nitrifying bacteria quantities of RRS in the rhizosphere soil were much lower than that of other genotype soybeans. The effects of different genotype soybeans on ammoniation intensity and nitrification intensity were remarkable. The nitrification intensity and the nitrifying bacteria had the great positive correlation and sustainable development.
基金Victorian Node of Metabolomics Australia,which is funded through Bioplatforms Australia Pty Ltd,a National Collaborative Research Infrastructure Strategy,5.1 Biomolecular Platforms and informatics investment,and co-investment from the Victorian State Government and The University of Melbournesupported by the Australian Centre for Plant Functional Genomics,the Australian Research Council(LP130101055)Du Pont Pioneer and the Grains Research and Development Corporation(GRS10437)
文摘Maximizing NO3 uptake during seedling development is important as it has a major influence on plant growth and yield. However, little is known about the processes leading to, and involved in, the initiation of root NO3 uptake capacity in developing seedlings. This study examines the physiological processes involved in root NO3 uptake and metabolism, to gain an understanding of how the NO3 uptake system responds to meet demand as maize seedlings transition from seed N use to external N capture. The concentrations of seedderived free amino acids within root and shoot tissues are initially high, but decrease rapidly until stabilizing eight days after imbibition （DAI）. Similarly, shoot N% decreases, but does not stabilize until 12-13 DAI. Following the decrease in free amino acid concentrations, root NO3- uptake capacity increases until shoot N% stabilizes. The increase in root NO3 uptake capacity corresponds with a rapid rise in transcript levels of putative NO3 transporters, ZmNRT2.1 and ZmNRT2.2. The processes underlying the increase in root NO3- uptake capacity to meet N demand provide an insight into the processes controlling N uptake.
基金Acknowledgements The project is supported by the National Basic Research Program of China （No. 2014CB660808）, Jiangsu Provincial Founds for Distinguished Young Scholars （No. BK20130046）, the National Natural Science Foundation of China （Nos. 61525402 and 21275076）, QingLan Project, Program for New Century Excellent Talents in University （No. NCET-13-0853）, Synergetic Innovation Center for Organic Electronics and Information Displays, the Priority Academic Program Development of Jiangsu Higher Education Institutions （PAPD）, SERC Grant （No. 1021700142） from A＊STAR, Singapore, the scholarship from China Scholarships Council （No. 201508320304）, the Jiangsu Provincial Founds for Graduate Student Innovation Project （No. KYLX15_0821）.
文摘The rational design of earth-abundant catalysts with excellent water splitting activities is important to obtain clean fuels for sustainable energy devices. In this study, mixed transition metal oxide nanoparticles encapsulated in nitrogendoped carbon （denoted as AB2O4@NC） were developed using a one-pot protocol, wherein a metal-organic complex was adopted as the precursor. As a proof of concept, MnCo2O4@NC was used as an electrocatalyst for water oxidation, and demonstrated an outstanding electrocatalytic activity with low overpotential to achieve a current density of 10 mA·cm^-1 0/10 = 287 mV）, small Tafel slope （55 mV·dec^-1）, and high stability （96% retention after 20 h）. The excellent electrochemical performance benefited from the synergistic effects of the MnCo2O4 nanoparticles and nitrogen-doped carbon, as well as the assembled mesoporous nanowire structure. Finally, a highly stable all-solid-state supercapacitor based on MnCo2O4@NC was demonstrated （1.5% decay after 10,000 cycles）.
