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Regulation of Plant Vitamin Metabolism:Backbone of Biofortification for the Alleviation of Hidden Hunger

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Molecular Plant 2021年第3期14卷 40-60页

作者： Ling Jiang Simon Strobbe dominique van der straeten Chunyi Zhang Biotechnology Research Institute Chinese Academy of Agricultural SciencesBeijing 100081P.R.China Laboratory of Functional Plant Biology Ghent UniversityK.L.Ledeganckstraat 359000 GhentBelgium These authors contributed equally to this work

Micronutrient deficiencies include shortages of vitamins and *** affect billions of people and are associated with long-range effects on health,learning ability,and huge economic *** of multiple micronutrients can play an important role in combating *** challenge,however,is to balance plant growth with nutrient requirements for ***,we summarize the major progress about vitamin biosynthesis and its response to the changing *** discuss the interactions among vitamins as well as possible strategies for vitamin ***,we propose to integrate new breeding technologies with metabolic pathway modification to facilitate the biofortification of crops,thereby alleviating the hidden hunger of target populations.

关键词： vitamins biosynthesis regulatory mechanisms biofortification hidden hunger

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N-terminal truncated RHT-1 proteins generated by translational reinitiation cause semi-dwarfing of wheat Green Revolution alleles

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Molecular Plant 2021年第4期14卷 679-687页

作者： Karel van De Velde Stephen GThomas Floor Heyse Rim Kaspar dominique van der straeten Antje Rohde BASF Belgium Coordination Center-Innovation Center Gent Technologiepark 101.9052 GhentBelgium Rothamsted Research HarpendenHertfordshire AL52JQUK Laboratory of Functional Plant Biology Department of BiologyGhent UniversitK.L.Ledeganckstrat 359000 GhentBelgium

The unprecedented wheat yield increases during the Green Revolution were achieved through the introduc-tion of the Reduced height(Rht)-B1b and Rht-D1b semi-dwarfing *** Rht-1 alleles encode growth-repressing DELLA genes containing a stop codon within their open reading frame that confers gibberellin(GA)-insensitive *** this study,we successfully took the hurdle of detecting wild-type RHT-1 proteins in different wheat organs and confirmed their degradation in response to *** further demonstrated that Rht-B1b and Rht-D1b produce N-terminal truncated proteins through trans-lational *** of these N-terminal truncated proteins in transgenic lines and in Rht-D1c,an allele containing multiple Rht-D1b copies,demonstrated their ability to cause strong dwarfism,resulting from their insensitivity to GA-mediated degradation.N-terminal truncated proteins were detected in spikes and nodes,but not in the aleurone *** Rht-B 1b and Rht-D1b alleles cause dwarfism but have wild-type dormancy,this finding suggests that tissue-specific differences in translational reinitiation may explain why the Rht-1 alleles reduce plant height without affecting *** together,our findings not only reveal the molecular mechanism underlying the Green Revolution but also demonstrate that trans-lational reinitiation in the main open reading frame occurs in plants.

关键词： gibberellin(GA)signaling DELLA Rht-1 dwarfing ales Green Revolution wheat translational reinitiation

Photoreceptor-Mediated Bending towards UV-B in Arabidopsis

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Molecular Plant 2014年第6期7卷 1041-1052页

作者： Filip vandenbussche Kimberley Tilbrook Ana Carolina Fierro Kathleen Marchal Dirk Poelman dominique van der straeten Roman UIm boratory of Functional Plant Biology Department of Physiology Faculty of Sciences Ghent University B-9000 Ghent Belgium Department of Botany and Plant Biology Sciences III University of Geneva CH-1211 Geneva 4 Switzerland Department of Microbial and Molecular Systems Faculty of Bioscience Engineering KU Leuven B-3001 Heverlee Belgium Department of Plant Biotechnology and Bioinformatics Faculty of Sciences Ghent University B-9000 Ghent Belgium Department of Information Technology IMinds Faculty of Sciences Ghent University B-go00 Ghent Belgium Lumilab Department of Solid State Sciences Faculty of Sciences Ghent University B-9000 Ghent Belgium

Plants reorient their growth towards light to optimize photosynthetic light capture--a process known as phototropism. Phototropins are the photoreceptors essential for phototropic growth towards blue and ultraviolet-A （UV- A） light. Here we detail a phototropic response towards UV-B in etiolated Arabidopsis seedlings. We report that early differential growth is mediated by phototropins but clear phototropic bending to UV-B is maintained in photl phot2 double mutants. We further show that this phototropin-independent phototropic response to UV-B requires the UVoB photoreceptor UVR8. Broad UV-B-mediated repression of auxin-responsive genes suggests that UVR8 regulates directional bending by affecting auxin signaling. Kinetic analysis shows that UVR8-dependent directional bending occurs later than the phototropin response. We conclude that plants may use the full short-wavelength spectrum of sunlight to efficiently reorient photosynthetic tissue with incoming light.

关键词： phototropism UV-B auxin UVR8 Arabidopsis,

Folate Biofortification of Potato by Tuber-Specific Expression of Four Folate Biosynthesis Genes

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Molecular Plant 2018年第1期11卷 175-188页

作者： Jolien De Lepeleire Simon Strobbe Jana Verstraete Dieter Blancquaert Lars Ambach Richard G.F. Visser Christophe Stove dominique van der straeten Laboratory of Functional Plant Biology Department of Biology Ghent University K.L. Ledeganckstraat 35 9000 Ghent Belgium Laboratory of Toxicology Department of BioanalysisGhent University Ottergemsesteenweg 460 9000 Ghent Belgium Plant Breeding Wageningen University & Research Droevendaalsesteeg 16700 Wageningen the Netherlands These authors contributed equally to this article.

Insufficient dietary intake of micronutHents, known as ＂hidden hunger＂, is a devastating global burden, affecting two billion people. Deficiency of folates （vitamin B9）, which are known to play a central role in Cl metabolism, causes birth defects in at least a quarter million people annually. Biofortification to enhance the level of naturally occurring folates in crop plants, proves to be an efficient and cost-effective tool in fighting folate deficiency. Previously, introduction of folate biosynthesis genes GTPCHI andADCS, proven to be a successful biofortification strategy in rice and tomato, turned out to be insufficient to adequately increase folate levels in potato tubers. Here, we provide a proof of concept that additional introduction of HPPK/DHPS and/or FPGS, downstream genes in mitochonddal folate biosynthesis, enables augmenta- tion of folates to satisfactory levels （12-fold） and ensures folate stability upon long-term storage of tubers. In conclusion, this engineering strategy can serve as a model in the creation of folate-accumulating potato cultivars, readily applicable in potato-consuming populations suffedng from folate deficiency.

关键词： folate vitamin Bg malnutrition biofortification potato metabolic engineering

The Arabidopsis thaliana RNA Editing FactorSLO2, which Affects the Mitochondrial ElectronTransport Chain, Participates in Multiple Stressand Hormone Resoonses

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Molecular Plant 2014年第2期7卷 290-310页

作者： Qiang Zhu Jasper Dugardeyn Chunyi Zhang Per Mühlenbock Peter J. Eastmond Roland Valcke Barbara De Coninck Sevgi Öden Michael Karampelias Bruno P.A. Cammue Els Prinsen dominique van der straeten Laboratory of Functional Plant Biology Department of Physiology Ghent University K.L. Ledeganckstraat 35 B-9000 Ghent Belgium Present address: Milieudienst Midden West-Vlaanderen Peter Benoitstraat 13 8800 Roeselare Belgium Present address: Biotechnology Research Ins. Chinese Academy of Agricultural Sciences 12 ZhongGuanCun NanDajie Haidian District Beijing 100081 PR China Present address: Department of Plant Protection Biology Swedish University of Agricultural Sciences Sundsvägen 14 Sweden Department of Plant Biology and Crop Science Rothamsted Research Harpenden AL5 2JQ UK Molecular and Physical Plant Physiology Faculty of Sciences Hasselt University Bldg. D Agoralaan B-3590 Diepenbeek Limburg Belgium Centre of Microbial and Plant Genetics (CMPG) Katholieke Universiteit Leuven Kasteelpark Arenberg 20 B-3001 Heverlee Belgium Department of Biology University of Antwerp Groenenborgerlaan 171 B-2020 Antwerpen Belgium Present address: Department of Plant Systems Biology VIB Ghent University 9052 Gent Belgium

Recently, we reported that the novel mitochondrial RNA editing factor SLO2 is essential for mitochondrialelectron transport, and vital for plant growth through regulation of carbon and energy metabolism. Here, we show thatmutation in SL02 causes hypersensitivity to ABA and insensitivity to ethylene, suggesting a link with stress ***, slo2 mutants are hypersensitive to salt and osmotic stress during the germination stage, while adult plantsshow increased drought and salt tolerance. Moreover, slo2 mutants are more susceptible to Botrytis cinerea *** increased expression of nuclear-encoded stress-responsive genes, as well as mitochondrial-encoded NAD genes ofcomplex I and genes of the alternative respiratory pathway, was observed in slo2 mutants, further enhanced by ABAtreatment. In addition, H202 accumulation and altered amino acid levels were recorded in slo2 mutants. We conclude thatSLO2 is required for plant sensitivity to ABA, ethylene, biotic, and abiotic stress. Although two stress-related RNA editingfactors were reported very recently, this study demonstrates a unique role of SLO2, and further supports a link betweenmitochondrial RNA editing events and stress response.

关键词： ABA Arabidopsis thaliana ethylene plant stress mitochondria RNA editing PPR protein SLO2 stress

Cytokinins regulate spatially specific ethylene production to control root growth in Arabidopsis

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Plant Communications 2024年第11期5卷 99-115页

作者： Amel Yamoune Marketa Zdarska Thomas Depaepe Anna Rudolfova Jan Skalak Kenneth Wayne Berendzen Virtudes Mira-Rodado Michael Fitz Blanka Pekarova Katrina Leslie Nicolas Mala Paul Tarr Eliska Spackova Lucia Tomovicova Barbora Parizkova Abigail Franczyk Ingrid Kovacova Vladislav Dolgikh Elena Zemlyanskaya Marketa Pernisova Ondrej Novak Elliot Meyerowitz Klaus Harter dominique van der straeten Jan Hejatko CEITEC(Central European Institute of Technology) Masaryk UniversityBrnoCzech Republic National Centre for Biomolecular Research Faculty of ScienceMasaryk UniversityBrnoCzech Republic Laboratory of Functional Plant Biology Department of BiologyGhent UniversityGentBelgium Center for Plant Molecular Biology University of TübingenTübingenGermany Howard Hughes Medical Institute and Division of Biology and Biological Engineering California Institute of TechnologyPasadenaCAUSA Faculty of Science PalackýUniversity and Institute of Experimental BotanyThe Czech Academy of SciencesOlomoucCzech Republic Institute of Cytology and Genetics Siberian BranchRussian Academy of SciencesNovosibirsk 630090Russia Faculty of Natural Sciences Novosibirsk State UniversityNovosibirsk 630090Russia

Two principal growth regulators,cytokinins and ethylene,are known to interact in the regulation of plant ***,information about the underlying molecular mechanism and positional specificity of cytokinin/ethylene crosstalk in the control of root growth is *** have identified the spatial specificity of cytokinin-regulated root elongation and root apical meristem(RAM)size,both of which we demonstrate to be dependent on ethylene *** of the cytokinin biosynthetic gene ISOPENTENYLTRANSFERASE(IPT)in proximal and peripheral tissues leads to both root and RAM *** contrast,IPT activation in distal and inner tissues reduces RAM size while leaving the root length comparable to that of mock-treated *** show that cytokinins regulate two steps specific to ethylene biosynthesis:production of the ethylene precursor 1-aminocyclopropane-1-carboxylate(ACC)by ACC SYNTHASEs(ACSs)and its conversion to ethylene by ACC OXIDASEs(ACOs).We describe cytokinin-and ethylene-specific regulation controlling the activity of ACSs and ACOs that are spatially discrete along both proximo/distal and radial root *** direct ethylene measurements,we identify ACO2,ACO3,and ACO4 as being responsible for ethylene biosynthesis and ethylene-regulated root and RAM shortening in cytokinin-treated *** interaction between ARABIDOPSIS RESPONSE REGULATOR 2(ARR2),a member of the multistep phosphorelay cascade,and the C-terminal portion of ETHYLENE INSENSITIVE 2(EIN2-C),a key regulator of canonical ethylene signaling,is involved in the cytokinin-induced,ethylene-mediated control of *** propose tight cooperation between cytokinin and ethylene signaling in the spatially specific regulation of ethylene biosynthesis as a key aspect of the hormonal control of root growth.

关键词： cytokinin ethylene ACC SYNTHASE ACC OXIDASE multistep phosphorelay Arabidopsis

Skewed superstatistical distributions from a Langevin and Fokker-Planck approach

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Chinese Science Bulletin 2011年第34期56卷 3633-3638页

作者： van der straeten Erik BECK Christian Queen Mary University of London School of Mathematical Sciences

The superstatistics concept is a useful statistical method to describe inhomogeneous complex systems for which a system parameter βfluctuatesonalargespatio-temporal scale. Inthispaper weanalyze ameasuredtimeseriesofwindspeed fluctuationsandextract the superstatistical distribution function f(β) directly from the data. We construct suitable Langevin and Fokker-Planck models with a position dependent β-field and show that they reduce to standard type of superstatistics in the overdamped limit.

关键词：普朗克复杂系统统计方法时间尺度分布函数位置相关不均匀过阻尼

Hip resurfacing arthroplasty complicated by mismatched implant components

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World Journal of Orthopedics 2017年第3期8卷 286-289页

作者： Alessandro Calistri Patricia Campbell Catherine van der straeten Koen Aimè De Smet Department of Orthopedic and Traumatology ANCA Clinic Implant Retrieval Lab Orthopaedic Institute for Children Department Orthopaedics and Traumatology UZ University Hospital ANCA Medical Centre

Metal-on-metal hip resurfacing has gained popularity as a feasible treatment option for young and active patients with hip osteoarthritis and high functional *** procedure should only be performed by surgeons who have trained specifically in this *** planning is essential for hip resurfacing in order to execute a successful operation and preview any technical *** authors present a case of a man who underwent a resurfacing arthroplasty for osteoarthritis of the left hip that was complicated by mismatched implant components that were revised three days afterwards for severe pain and leg length *** mistakes,although rare,can be prevented by educating operating room staff in the size and colour code tables provided by the companies on their prostheses or implant boxes.

关键词： Hip resurfacing Mismatch Revision

Sensitive capacitive pressure sensors based on graphene membrane arrays

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Microsystems & Nanoengineering 2020年第1期6卷 176-184页

作者： Makars Siskins Martin Lee dominique Wehenkel Richard van Rijn Tijmen W.de Jong Johannes R.Renshof Berend C.Hopman Willemijn S.J.M.Peters Dejan Davidovikj Herre S.J.van der Zant Peter G.Steeneken Kavli Institute of Nanoscience Delft University of TechnologyLorentzweg 12628 CJ DelftThe Netherlands Applied Nanolayers B.V. Feldmannweg 172628 CT DelftThe Netherlands Department of Precision and Microsystems Engineering Delft University of TechnologyMekelweg 22628 CD DelftThe Netherlands

The high flexibility,impermeability and strength of graphene membranes are key properties that can enable the next generation of nanomechanical ***,for capacitive pressure sensors,the sensitivity offered by a single suspended graphene membrane is too small to compete with commercial ***,we realize highly sensitive capacitive pressure sensors consisting of arrays of nearly ten thousand small,freestanding double-layer graphene *** fabricate large arrays of small-diameter membranes using a procedure that maintains the superior material and mechanical properties of graphene,even after high-temperature *** sensors are readout using a low-cost battery-powered circuit board,with a responsivity of up to 47:8aF Pa^(−1) mm^(−2),thereby outperforming the commercial sensors.

关键词： graphene arrays thereby