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Nonlocal Symmetry of the Lax Equation Related to Riccati-Type Pseudopotential

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Chinese Physics Letters 2012年第12期29卷 29-31页

作者： WANG Yun-Hu CHEN Yong xin xiang-peng Shanghai Key Laboratory of Trustworthy Computing East China Normal UniversityShanghai 200062

We investigate the Lax equation that can be employed to describe motions of long waves in shallow water under gravity.A nonlocal symmetry of this equation is given and used to find exact solutions and derive lower integrable models from higher *** is interesting that this nonlocal symmetry links with its corresponding Riccati-type *** introducing suitable and simple auxiliary dependent variables,the nonlocal symmetry is localized and used to generate new solutions from trivial ***,this equation is reduced to an ordinary differential equation by means of this nonlocal symmetry and some local symmetries.

关键词： symmetry equation trivial

Symmetry Reduction,Exact Solutions and Conservation Laws of the Modified Kadomtzev-Patvishvili-ⅡEquation

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Chinese Physics Letters 2011年第2期28卷 1-4页

作者： xin xiang-peng LIU Xi-Qiang ZHANG Lin-Lin School of Mathematical Sciences Liaocheng UniversityLiaocheng 252059

Employing the modified Clarkson-Kruskal direct method,we realize the symmetries of the nonlinear(2+1)-dimensional modified Kadomtzev-Patvishvili-Ⅱ*** the given Lie symmetry,we obtain the similarity reduction and new ... 详细信息

关键词： equation symmetry symmetry

Association-Dissociation of Glycolate Oxidase with Catalase in Rice： A Potential Switch to Modulate Intracellular H2O2 Levels

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Molecular Plant 2016年第5期9卷 737-748页

作者： Zhisheng Zhang Yuanyuan Xu Zongwang Xie xiangyang Li Zheng-Hui He xin-xiang peng State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources South China Agricultural University Guangzhou 510642 China Department of Biotechnology College of Bioscience and Biotechnology Hunan Agricultural University Changsha 410128 China Department of Biology San Francisco State University San Francisco CA 94132 USA

Rapid and dynamic change in hydrogen peroxide （H2O2） levels can serve as an important signal to regulate various biological processes in plants. The change is realized by tilting the balance between its production and scavenging rates, in which membrane-associated NADPH oxidases are known to play a crucial role. Functioning independently from NADPH oxidases, glycolate oxidase （GLO） was recently demonstrated as an aitemative source for H2O2 production during both germ-for-germ and non-host resistance in plants. In this study, we show that GLO physically interacts with catalase （CAT） in rice leaves, and that the interaction can be deregulated by salicylic acid （SA）. Furthermore, the GLO-mediated H2O2 accumulation is synergistically enhanced by SA. Based on the well-known mechanism of substrate channeling in enzyme complexes, SA-induced H2O2 accumulation likely results from SA-induced GLO-CAT dissociation. In the GLO-CAT complex, GLO-mediated H2O2 production during photorespiration is very high, whereas the affinity of CAT for H2O2 （measured Km ≈ 43 raM） is extraordinarily low. This unique combination can further potentiate the increase in H2O2 when GLO is dissociated from CAT. Taken together, we propose that the physical association-dissociation of GLO and CAT, in response to environmental stress or stimuli, seems to serve as a specific mechanism to modulate H2O2 levels in rice.

关键词： association-dissociation catalase glycolate oxidase hydrogen peroxide salicylic acid

Differential Expression of Rice Genes Under Different Nitrogen Forms and Their Relationship with Sulfur Metabolism

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Journal of Integrative Plant Biology 2006年第10期48卷 1177-1184页

作者： Guo-Hui Zhu Chu-Xiong Zhuang Yu-Oi Wang Lin-Rong Jiang xin-xiang peng College of Life Sciences South China Agricultural University Guangzhou 510642 China

Microarray analysis was initially performed to screen for differentially expressed genes between nitrate-and ammonium-fed rice （Oryza sativa L.） leaves, in total, 198 genes were shown to have a unique expression response to each treatment and most of the genes for which function is known were involved in signal transduction, plant stress resistance, transcriptional regulation, and basic metabolism. Northern blotting analysis confirmed that expression of the MT and PCS genes was highly upregulated in ammonium-fed leaves compared with expression in nitrate-fed leaves and it was further revealed that ammonium-fed leaves accumulated more cysteine and glutathione. The upregulated expressions of the MTand PCS genes and the higher levels of cysteine and glutathione in ammonium-fed leaves indicate that ammonium may be able to accelerate sulfur assimilation metabolism in rice leaves. Unexpectedly, Northern blotting analysis showed that the expression of the two key enzymes in the sulfur assimilation pathway, namely adenosine 5＇-phosphosulfate reductase and O-acetylserine（thiol）lyase, was not upregulated by ammonium treatment. It was found that the total content of free amino acids was much higher in ammonium-fed leaves compared with nitrate-fed leaves, mainly resulting from an increase in several amino acids such as serine, asparagine, glutamine, and arginine. The increased amino acids, in particular serine （as a central substrate for the synthesis of the thioi metabolites）, may have promoted sulfur assimilation metabolism under conditions of ammonium nutrition.

关键词： gene expression nitrogen forms rice sulfur assimilation

Pharmacodynamic and kinetic effect of rabeprazole on serum gastrin level in relation to CYP2C19 polymorphism in Chinese Hans

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World Journal of Gastroenterology 2006年第29期12卷 4750-4753页

作者： Yong-Mei Hu Qiao Mei xin-Hua Xu xiang-peng Hu Nai-Zhong Hu Jian-Ming Xu Department of Gastroenterology The First Affiliated Hospital Anhui Medical University Hefei 230022 Anhui Province China

AIM： To observe the pharmacokinetics and pharmacodynamics of rabeprazole and compare serum gastrin concentrations in different CYP2C19 genotype groups. METHODS： The CYP2C19 genotype status of Chinese Han healthy volunteers was determined by polymerase chain reaction-restriction fragment length polymorphism method. Twenty H pylori-negative healthy subjects voluntary participated in the study. They were divided into the following three groups： homozygous extensive metabolizers （homEM）, heterozygous extensive metabolizers （hetEM） and poor metabolizers （PM）. After they orally received rabeprazole 20 mg once daily in the morning of d 1 and d 8, blood samples were collected at various time-points until 24 h after administration and intragastric pH values were monitored for 24 h by Digitrapper pH. Serum gastrin concentrations were measured by radioimmunoassay. Serum concentrations of rabeprazole were measured by high performance liquid chromatography. RESULTS： The mean AUC values for rabeprazole after a single and repeated doses were significantly different between the homEM and PM groups, but not between the homEM and hetEM, or the hetEM and PM groups. No significant differences in intragastric pH medians were observed among the three different genotype groups after a single dose or repeated doses. The ratio of pH medians between d 1 and d 8 ranged from 84% to 108%. The mean gastrin AUC values were also different among the three genotype groups, with a relative ratio of 1.0, 1.2 and 1.5 after a single dose and 1.0, 1.5 and 1.6 after repeated doses in the homEM, hetEM and PM groups, respectively. The gastrin AUC values among the three different genotype groups showed no significant difference either after a single dose or repeated doses. The subject who had lower intragastric acidity showed higher serum gastrin levels and concentrations of rabeprazole. CONCLUSION： In Chinese Han healthy people, the pharmacokinetics of rabeprazole are dependent on the CYP2C19 genotype

关键词： CYP450 Pharmacokinetics Pharmacody-namics Proton pump inhibitors

A Synthetic Photorespiratory Shortcut Enhances Photosynthesis to Boost Biomass and Grain Yield in Rice

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Molecular Plant 2020年第12期13卷 1802-1815页

作者： Li-Min Wang Bo-Ran Shen Bo-Di Li Chuan-Ling Zhang Min Lin Pan-Pan Tong Li-Li Cui Zhi-Sheng Zhang xin-xiang peng State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources College of Life SciencesSouth China Agricultural UniversityGuangzhou 510642China College of Agriculture and Biology Zhongkai University of Agriculture and EngineeringGuangzhouChina

Several photorespiratory bypasses have been introduced into plants and shown to improve photosynthesis by increasing chloroplastic C02 concentrations or optimizing energy *** recently reported that an engineered GOC bypass could increase photosynthesis and productivity in ***,the grain yield of GOC plants was unstable,fluctuating in different cultivation seasons because of varying seed setting *** this study,we designed a synthetic photorespiratory shortcut(the GCGT bypass)consisting of genes en-coding Oryza sativa glycolate oxidase and Escherichia coli catalase,glyoxylate carboligase,and tartronic semialdehyde *** GCGT bypass was guided by an optimized chloroplast transit peptide that targeted rice chloroplasts and redirected 75% of carbon from glycolate metabolism to the Calvin cycle,identical to the native photorespiration *** transgenic plants exhibited significantly increased biomass production and grain yield,which were mainly attributed to enhanced photosynthesis due to increased chloroplastic C02 *** the increases in biomass production and grain yield,GCGT transgenic plants showed a reduced seed setting rate,a phenotype previously reported for the GOC *** transcriptomic,physiological,and biochemical assays revealed that photosynthetic car-bohydrates were not transported to grains in an efficient manner,thereby reducing the seed setting *** together,our results demonstrate that the GCGT photorespiratory shortcut confers higher yield by promoting photosynthesis in rice,mainly through increasing chloroplastic C02 concentrations.

关键词： photorespiratory shortcut photosynthesis yield rice

ixed Dubin-Gilbert Syndrome： A Compound Heterozygous Phenotype of Two Novel Variants in ABCC2 Gene

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Chinese Medical Journal 2017年第8期130卷 1003-1005页

作者： Jun Jiang Hua-Gui Wang Wei-Li Wu xiang-xin peng The Key Laboratory of Genome Sciences and Information Beijing Institute of Genomics Chinese Academy of Sciences Beijing 100101 China Department of Infectious Diseases China-Japan Friendship Hospital Beijing 100029 China

Gilbert syndrome （GS, MIM #143500） is characterized by fluctuating mild, unconjugated hyperbilirubinemia 〈85 μmol/L and is caused by mutations in the bilirubin uridine diphosphate （UDP）-glucuronosyltransferase gene （ UGT1A 1 ）,Dubin-Johnson syndrome （DJS, M I M #237500） is characterized by fluctuating mild, predominantly conjugated hyperbilirubinemia and is caused by mutations in the ATP-binding cassette subfamily C member 2 gene （ABCC2）.

关键词： ABCC2 Gene Dubin-Johnson Syndrome Gilbert's Syndrome Hyperbilirubinemia UGTIAI Gene

广义(3+1)维Zakharov-Kuznetsov方程的对称约化、精确解和守恒律

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物理学报 2017年第8期66卷 1-7页

作者：张丽香刘汉泽辛祥鹏聊城大学数学科学学院聊城252059

运用李群分析,得到了广义(3+1)维Zakharov-Kuznetsov(ZK)方程的对称及约化方程,结合齐次平衡原理,试探函数法和指数函数法得到了该方程的群不变解和新精确解,包括冲击波解、孤立波解等.进一步给出了广义(3+1)维ZK方程的伴随方程和守恒律.

关键词： Zakharov-Kuznetsov方程李群分析精确解守恒律

Engineering a New Chloroplastic Photorespiratory Bypass to In crease Photosynthetic Efficiency and Productivity in Rice

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Molecular Plant 2019年第2期12卷 199-214页

作者： Bo-Ran Shen Li-Min Wang Xiu-Ling Lin Zhen Yao Hua-Wei Xu Cheng-Hua Zhu Hai-Yan Teng Li-Li Cui E.-E. Liu Jian-Jun Zhang Zheng-Hui He xin-xiang peng State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources College of Life Sciences South China Agricultural University Guangzhou 510642 China College of Agricultural Henan University of Science and Technology Luoyang Henan China Departme nt of Biology San Fran cisco State University San Fran cisco CA USA These authors contributed equally to this article.

Over the past few years, three photorespiratory bypasses have been introduced into plants, two of which led to observable in creases in photos yn thesis and biomass yield. However, most of the experiments were carried out using Arabidopsis under controlled environmental conditions, and the increases were only observed under low-light and short-day conditions. In this study, we designed a new photorespiratory bypass (called GOC bypass), characterized by no reducing equivalents being produced during a complete oxidation of glycolate into CO2 catalyzed by three rice-self-originating enzymes, i.e., glycolate oxidase, oxalate oxidase, and catalase. We successfully established this bypass in rice chloroplasts using a multi-gene assembly and transformation system. Transgenic rice plants carrying GOC bypass (GOC plants) showed significant increases in photosynthesis efficiency, biomass yield, and nitrogen content, as well as several other CO2-enriched phe no types under both greenhouse and field conditions .Grain yield of GOC plants varied depending on seeding season and was increased significantly in the spring. We further demonstrated that GOC plants had significant advantages under high-light conditions and that the improvements in GOC plants resulted primarily from a photosynthetic CO2-concentrating effect rather than from improved energy balance. Taken together, our results reveal that engineering a newly designed chloroplastic photorespiratory bypass could increase photosynthetic efficiency and yield of rice plants grown in field conditions, particularly under high light.

关键词： photorespiratory bypass photosynthetic efficiency productivity rice