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Role of oxyR from Sinorhizobium meliloti in Regulating the Expression of Catalases

Acta Biochimica et Biophysica Sinica 2005年第6期37卷 421-428页

作者： Li EUO~(1.3) Ming-Sheng QI~(1.3) Shi-Yi YAO~2 Hai-Ping CHENG~2 Jia-Bi ZHU~1 Guan-Qiao YU~1 1 National Laboratory of plant Molecular Genetics, institute of plant Physiology and Ecology, Shanghai institutes for Biological Sciences.Chinese Academy of Sciences, Shanghai 200032. China 2 Biological Sciences Department, Lehman College, the City University of New York, Bronx, NY 10468. USA, 3 Graduate School of the Chinese Academy of Sciences, Shanghai 200032. China National Laboratory of plant Molecular Genetics Institute of Plant Physiology and Ecology Shanghai Institutes for Biological Sciences Chinese Academy of SciencesShanghai 200032 China Graduate School of the Chinese Academy of SciencesShanghai 200032 China Biological Sciences Department Lehman College the City University of New YorkBronx NY 10468 USA

The process of symbiotic nitrogen fixation results in the generation of reactive oxygen speciessuch as the superoxide anion（O2-）and hydrogen peroxide（H2O2）.The response of rhizobia to these toxicoxygen species is an important factor in nodulation and nitrogen *** Sinorhizobium meliloti,oneoxyR homologue and three catalase genes,katA,katB,and katC were detected by sequence *** gene is located next to and divergently from katA on the *** investigate the possible rolesof oxyR in regulating the expression of catalases at the transcriptional level in ***,an insertion mutantof this gene was *** mutant was more sensitive and less adaptive to H2O2than the wild typestrain,and total catalase/peroxidase activity was reduced approximately fourfold with the OxyR mutationrelative to *** activities of KatA and KatB and the expression of katA::lacZ and katB::lacZ promoterfusions were increased in the mutant strain compared with the parental strain grown in the absence of H2O2,indicating that katA and katB are repressed by ***,when exposed to H2O2,katA expressionwas also increased in both *** and Escherichia *** exposed to H2O2,OxyR is convertedfrom a reduced to an oxidized form in *** concluded that the reduced form of OxyR functions as arepressor of katA and katB ***,in the presence of H2O2,reduced OxyR is converted to theoxidized form of OxyR that then results in increased katA *** further showed that oxyR expressionis autoregulated via negative feedback.

关键词： Sinorhizobium meliloti OxyR catalase katA H2O2

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Novel, X-ray supported kinetic imaging of hidden-lifestyle arthropods

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Insect Science 2021年第1期28卷 281-284页

作者： Sandor Keszthelyi David Szollosi Lilia Strobe Szabolcs Osvath Krisztian Szigeti Zsolt Pbnya Adam Csoka Tamas Donko Faculty of Agricultural and Environment Sciences Department of Plant Production and ProtectionInstitute of Plant ScienceKaposvar UniversityKaposvarHungary Kinepict Ltd. BudapestHungary Medicopus Nonprofit Ltd. KaposvarHungary

Dear Editor,There are several arthropods,which live and develop covertly in plant *** plant tissues surrounding them provide them with shelter during their vulnerable developing stage or ensure overwintering as well a... 详细信息

关键词： arthropod kinetic hidden

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Development of UiO-66-NH_(2) and RuO_(2) composite-modified carbon fiber for highly sensitive sensing of ferulic acid

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Rare Metals 2023年第11期42卷 3630-3637页

作者： Jing Wang Qing-Bin Xu Jin-Xin Liu Wei-Jun Kong Lin-Chun Shi Key Laboratory of Chinese Medicine Resources Conservation State Administration of Traditional Chinese Medicine of the Peoples Republic of ChinaEngineering Research Center of Chinese Medicine Resource of Ministry of EducationInstitute of Medicinal Plant DevelopmentChinese Academy of Medical Sciences and Peking Union Medical CollegeBeijing100193China School of Traditional Chinese Medicine Capital Medical UniversityBeijing100069China

A new kind of UiO-66-NH_(2) and RuO_(2) composite loaded on carbon fiber was prepared by pulsed laser deposition and electrophoretic deposition,which was then utilized as working electrode in developing an electrochemical sensor for ferulic acid *** morphology,composition,chemical valence states of the developed composite were *** electrochemical redox reactions of ferulic acid were explored.

关键词： composite fiber carbon

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Tecia solanivora infestation increases tuber starch accumulation in Pastusa Suprema potatoes

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Journal of Integrative plant biology 2018年第11期60卷 1083-1096页

作者： Pavan Kumar Etzel Garrido Kun Zhao Yi Zheng Saleh Alseekh Erandi Vargas-Ortiz Alisdair R.Fernie Zhangjun Fei Katja Poveda Georg Jander Boyce Thompson institute for plant Research 533 Tower RoadIthacaNY 14853USA Department of Entomology Cornell UniversityIthacaNY 14853USA Max Planck institute of Molecular plant Physiology Wissenschaftspark GolmAm Muhlenberg 114476 PotsdamGermany department of entomology and nematology university of floridaGainesvilleFL 32611USA unidad de microbiologia basica y aplicada facultad de ciencias naturalesuniversidad autonoma de queretaroAv.de las Ciencias SINJuriquillaquerdtaroMdxico department of molecular biology institute for scientific and technological research of san luis potosiMexico

In response to infestation with larvae of the Guatemalan tuber moth （Tecia solanivora）, some Solanum tuberosum （potato） varieties exhibit an overcompensa- tion response, whereby the total dry mass of uninfested tubers is increased. Here, we describe early responses, within the first few days, of T. solanivora feeding, in the Colombian potato variety Pastusa Suprema. Non- targeted metabolite profiling showed significant second- ary metabolism changes in T. solanivora-infested tubers, but not in uninfested systemic tubers. In contrast, changes in primary metabolism were greater in unin- fested systemic tubers than in the infested tubers, with a notable 80% decline in systemic tuber sucrose levels within 1 d of T. solanivora infestation. This suggested either decreased sucrose transport from the leaves or increased sink strength, i.e., more rapid sucrose to starch conversion in the tubers. Increased sucrose synthesis was indicated by higher rubisco activase and lower starch synthase gene expression in the leaves of infested plants. Elevated sink strength was demonstrated by 45% more total starch deposition in systemic tubers of T. solanivord- infested plants compared to uninfested control plants. Thus, rather than investing in increased defense of uninfested tubers, Pastusa Suprema promotes deposition of photoassimilates in the form of starch as a response to T. solanivora infestation.

关键词： Tecia solanivora infestation increases tuber starch accumulation in Pastusa Suprema potatoes Figure

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Gut microbisal methionine impacts circadian clock gene expression and reactive oxygen species level in host gastrointestinal tract

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Protein & Cell 2023年第4期14卷 309-313页

作者： Xiaolin Liu Yue Ma Ying Yu Wenhui Zhang ingjing Shi Xuan Zhang Min Dai Yuhan Wang Hao Zhang Jiahe Zhang Jianghua Shen Faming Zhang Moshi Song Jun Wang CAS Key Laboratory of Pathogenic Microbiology and Immunology Institute of MicrobiologyChinese Academy of SciencesBeijing 100101China UniversityofChineseAcademyof Sciences Beijing100049China Medical Center for Digestive Diseases the Second Affliated Hospital of Nanjing Medical UniversityNanjing 210011China State Key Laboratory of Membrane biology Institute of ZoologyChinese Academy of SciencesBeijing100101China institute for Stem cell and Regeneration Chinese Academy of SciencesBeijing100101China Beijing institute for Stem Cell and Regenerative Medicine Beijing 100101China Key Lab of Holistic Integrative Enterology Nanjing Medical University.Nanjing 210011China

Dear Editor,Circadian rhythms are the periodic turmover of biological behaviors and physiological functions of many organisms(Allada and Bass,2021).In mammals,circadian rhythms are maintained by the clock system,involving central clock in suprachiasmatic nucleus and peripheral clock in organs like intestine;and at cellular level a cell-autonomous transcriptional and translational feedback loop involving clock genes like BMAL1(brain and muscle ARNT-Like 1,also known as ARNTL),CLOCK(clock circadian regulator),PER1/2/3(period circadian regulator 1/2/3)and CRY1/2(cryptochrome circadian regulator 1/2)(Allada and Bass,2021).

关键词： organs intestine circadian

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Characterization and Molecular Mapping of a Stripe Rust Resistance Gene in Synthetic Wheat CI110

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Journal of Integrative Agriculture 2012年第4期11卷 521-527页

作者： REN Qiang LIU Hui-juan ZHANG Zeng-yan FENG Jing XU Shi-chang PU Zong-jun XIN Zhi-yong The National Key Facility for Crop Gene Resources and Genetic Improvement/Key Laboratory of biology and Genetic Improvement of Triticeae Crops Ministry of Agriculture/Institute of Crop Sciences Chinese Academy of Agricultural Sciences Beijing 100081 P.R.China institute of plant Protection Chinese Academy of Agricultural Sciences Beijing 100193 P.R.China Crop Research institute Sichun Academy of Agricultural Sciences Chengdu 610066 P.R. China

Stripe rust,caused by Puccinia striiformis ***（Pst）,is one of the most destructive diseases of wheat（Triticum aestivum L.）.To diversify stripe rust-resistant resources for wheat breeding programs,a CIMMYT synthetic wheat line CI110 was identified to be resistant to 28 isolates of Pst,including 6 Chinese prevalent races *** analysis indicated that a single dominant gene was responsible for the stripe rust resistance in CI110,temporarily designated YrC110.A molecular map,harboring YrC110 and 9 linked SSR markers,was constructed through simple sequence repeat（SSR）,and bulked segregant *** linked markers and YrC110 were assigned on the short arm of chromosome 1B using the Chinese Spring nullisomic-tetrasomic and ditelosomic *** postulation based on seedling reaction patterns to 30 Pst isolates suggested that the resistance gene YrC110 seemed different from the other known resistance genes tested,such as Yr9,Yr10,Yr15,Yr24,and Yr26/*** SSR markers Xbarc187150,Xgwm18227,Xgwm11223,and Xbarc240292 distinguished YrC110 from Yr10,Yr15,Yr24,and Yr26/YrCH42,and could be used as diagnostic ones for YrC110 in wheat resistant breeding programs against stripe rust.

关键词： synthetic wheat Puccinia striiformis f.sp.tritici resistance gene simple sequence repeat(SSR) marker gene postulation

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The Salt Overly Sensitive （SOS） Pathway： Established and Emerging Roles

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Molecular plant 2013年第2期6卷 275-286页

作者： Hongtao Ji José M. Pardo Giorgia Batelli Michael J. Van Oosten Ray A. Bressan Xia Li The State Key Laboratory of plant Cell and Chromosome Engineering Center of Agricultural Resources Research Institute of Genetics andDevelopmental Biology Chinese Academy of Sciences Shijiazhuang Hebei 050021 PR China Instituto de Recursos Naturales y Agrobiologia Consejo Superior de Investigaciones Cientificas Sevilla-41012 Spain CNR institute of plant Genetics (CNR-IGV) Via Universita' i33 80055 Portici Italy Department of Agricultural Engineering and Agronomy University of Naples Federico II Via Universit~ 100 80055 Portici Italy Center for plant Environmental Stress Physiology Purdue University West Lafayette IN 47907-2010 USA Department Biological Sciences King Abdulaziz University Kingdom of Saudi Arabia

Soil salinity is a growing problem around the world with special relevance in farmlands. The ability to sense and respond to environmental stimuli is among the most fundamental processes that enable plants to survive. At the cellular level, the Salt Overly Sensitive （SOS） signaling pathway that comprises SOS3, SOS2, and SOS1 has been proposed to mediate cellular signaling under salt stress, to maintain ion homeostasis. Less well known is how cellularly heterog- enous organs couple the salt signals to homeostasis maintenance of different types of cells and to appropriate growth of the entire organ and plant. Recent evidence strongly indicates that different regulatory mechanisms are adopted by roots and shoots in response to salt stress. Several reports have stated that, in roots, the SOS proteins may have novel roles in addition to their functions in sodium homeostasis. SOS3 plays a critical role in plastic development of lateral roots through modulation of auxin gradients and maxima in roots under mild salt conditions. The SOS proteins also play a role in the dynamics of cytoskeleton under stress. These results imply a high complexity of the regulatory networks involved in plant response to salinity. This review focuses on the emerging complexity of the SOS signaling and SOS protein functions, and highlights recent understanding on how the SOS proteins contribute to different responses to salt stress besides ion homeostasis.

关键词： auxin ion homeostasis root system architecture salt stress the SOS signaling pathway.

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PCPD:plant cytochrome P450 database and web-based tools for structural construction and ligand docking

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Synthetic and Systems Biotechnology 2021年第2期6卷 102-109页

作者： Hui Wang Qian Wang Yuqian Liu Xiaoping Liao Huanyu Chu Hong Chang Yang Cao Zhigang Li Tongcun Zhang Jian Cheng Huifeng Jiang College of Biotechnology Tianjin University of Science&TechnologyTianjin300457China Key Laboratory of Systems microbial Biotechnology Tianjin Institute of Industrial BiotechnologyChinese Academy of SciencesTianjin300308China University of Chinese Academy of Sciences Beijing100049China School of biology and Biological Engineering South China University of TechnologyGuangzhou510006China Department of Environmental Medicine Institute of Environmental and Operational MedicineTianjinChina

plant cytochrome P450s play key roles in the diversification and functional modification of plant natural *** over 200,000 plant P450 gene sequences have been recorded,only seven crystalized P450 genes severely hampered the functional characterization,gene mining and engineering of important ***,we combined Rosetta homologous modeling and MD-based refinement to construct a high-resolution P450 structure prediction process(PCPCM),which was applied to 181 plant P450s with identified ***,we constructed a ligand docking process(PCPLD)that can be applied for plant P450s virtual screening.10 examples of virtual screening indicated the process can reduce about 80%screening space for next experimental ***,we constructed a plant P450 database(PCPD:http://***/),which includes the sequences,structures and functions of the 181 plant P450s,and a web service based on PCPCM and *** study not only developed methods for the P450-specific structure analysis,but also introduced a universal approach that can assist the mining and functional analysis of P450 enzymes.

关键词： plant P450 database Homologous modeling Ligand docking Database Web service

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Anticancer Activity of Diosgenin and Its Molecular Mechanism

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Chinese Journal of Integrative Medicine 2023年第8期29卷 738-749页

作者： REN Qun-li WANG Qian ZHANG Xin-qun WANG Miao HU Huan TANG Jun-jie YANG Xiong-tong RAN Ying-hui LIU Huan-huan SONG Zhi-xing LIU Jian-guo LI Xiao-lan Special Key Laboratory of microbial Resources and Drug Development of Guizhou Higher Education Institution Zunyi Medical UniversityZunyiGuizhou Province(563000)China School of Stomatology Zunyi Medical UniversityZunyiGuizhou Province(563000)China institute of Life Sciences Zunyi Medical UniversityZunyiGuizhou Province(563000)China Zheng'an County People's Hospital ZunyiGuizhou Province(563000)China School of Basic Medicine Zunyi Medical UniversityZunyiGuizhou Province(563000)China

Diosgenin, a steroidal sapogenin, obtained from Trigonella foenum-graecum, Dioscorea, and Rhizoma polgonati, has shown high potential and interest in the treatment of various cancers, such as oral squamous cell carcinoma, laryngeal cancer, esophageal cancer, liver cancer, gastric cancer, lung cancer, cervical cancer, prostate cancer, glioma, and leukemia. This article aims to provide an overview of the in vivo, in vitro,and clinical studies reporting the diosgenin’s anticancer effects. Preclinical studies have shown promising effects of diosgenin on inhibiting tumor cell proliferation and growth, promoting apoptosis, inducing differentiation and autophagy, inhibiting tumor cell metastasis and invasion, blocking cell cycle, regulating immunity and improving gut microbiome. Clinical investigations have revealed clinical dosage and safety property of diosgenin. Furthermore, in order to improve the biological activity and bioavailability of diosgenin, this review focuses on the development of diosgenin nano drug carriers, combined drugs and the diosgenin derivatives. However, further designed trials are needed to unravel the diosgenin’s deficiencies in clinical application.

关键词： diosgenin steroidal sapogenin anticancer molecular mechanism biological activity

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The international-Oryza Map Alignment Project:Development and analysis of a genus-wide comparative genomics platform to help solve the 9-billion people question

The international-Oryza Map Alignment Project:Development an...

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第十三届全国植物基因组学大会

作者： Rod A.Wing Robert Henry Yue-ie Hsing Nori Kurata Antonio Costa de Oliveira Olivier Panaud Darshan Brar Scott Jackson Kshirod Jena Carlos Machado Mike Sanderson Doreen Ware Arizona Genomics institute University of ArizonaUSA University of Queensland Australia institute of plant & microbial biology ASTaiwan National institute of Genetics(NIG) Japan plant Genomics & Breeding Center Federal University of PelotasBrazil plant Genome & Development Laboratory Perpignan UniversityFrance Department of plant Breeding & Genetics International Rice Research InstitutePhilippines Crop & Soil Sciences Department University of GeorgiaUSA Kshirod Jena Department of Plant Breeding & GeneticsInternational Rice Research InstitutePhilippines Department of biology University of MarylandUSA Department of Ecology & Evolutionary biology University of ArizonaUSA USDA-ARS Cold Spring Harbor LaboratoryUSA

In 2011,the Economist magazine published an issue entitled "The 9-billion People Question"(9BPQ) which addressed a world-wide dilemma that is central to most if not all plant scientists - How can our society grow enough food to feed 2 billion additional human beings in less than 40 years[1]? Rice(Oryza sativa) will play a key role in solving the 9BPQ as rice feeds half the world and it is that half that will double

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