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Long-distance nitrate signaling displays cytokinin dependent and independent branches

Journal of Integrative Plant Biology 2016年第3期58卷 226-229页

作者： Sandrine Ruffel Arthur Poitout Gabriel Krouk gloria M.coruzzi Benoit Lacombe Biochemistry and Plant Molecular Physiology Integrative Biology Institute for Plants'Claude Grignon'UMR CNRS/INRA/SupAgro/UM Place Pierre Viala 34060 Montpellier cedexFrance Center for Genomics and Systems Biology Department of Biology New York University New YorkNY 10003USA

The long-distance signaling network allowing a plant to properly develop its root system is crucial to optimize root foraging in areas where nutrients are available. Cytokinin is an essential element of the systemic signaling network leading to the enhancement of lateral root proliferation in areas where nitrate is available. Here,we explore more precisely：（i） which particular traits of lateral root growth（density and length of emerged lateral roots） are the targets of systemic signaling in a context of heterogeneous nitrate supply; and（ii） if the systemic signaling depends only on cytokinin or on a combination of several signalings.

关键词： Cytokinin development nitrate root systemic

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Nitrate Transport, Sensing, and Responses in Plants

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Molecular Plant 2016年第6期9卷 837-856页

作者： Jose A. O'Brien Andrea Vega Eleonore Bouguyon Gabriel Krouk Alain Gojon gloria coruzzi Rodrigo A. Gutierrez Departamento de Genetica Molecular y Microbiologia FONDAP Center for Genome Regulation Millennium Nucleus Center for Plant Systems and Synthetic Biology Pontificia Universidad Cat61ica de Chile 8331150 Chile Departamento de Fruticultura y Enologia Pontificia Universidad Catolica de Chile Santiago 7820436 Chile Departamento de Ciencias Vegetales Pontificia Universidad Catolica de Chile Santiago 7820436 Chile Department of Biology Center for Genomics and Systems Biology New York University New York NY 10003 USA SLaboratoire de Biochimie et Physiologie Moleculaire des Plantes Institut de Biologie Integrative des Plantes 'Claude Grignon' UMR CNRS INRA SupAgro UM 2 Place Viala 34060 Montpellier Cedex France

Nitrogen （N） is an essential macronutrient that affects plant growth and development. N is an important component of chlorophyll, amino acids, nucleic acids, and secondary metabolites. Nitrate is one of the most abundant N sources in the soil. Because nitrate and other N nutrients are often limiting, plants have developed sophisticated mechanisms to ensure adequate supply of nutrients in a variable environment. Nitrate is absorbed in the root and mobilized to other organs by nitrate transporters. Nitrate sensing activates signaling pathways that impinge upon molecular, metabolic, physiological, and developmental responses locally and at the whole plant level. With the advent of genomics technologies and genetic tools, important advances in our understanding of nitrate and other N nutrient responses have been achieved in the past decade. Furthermore, techniques that take advantage of natural polymor- phisms present in divergent individuals from a single species have been essential in uncovering new components. However, there are still gaps in our understanding of how nitrate signaling affects biolog- ical processes in plants. Moreover, we still lack an integrated view of how all the regulatory factors iden- tified interact or crosstalk to orchestrate the myriad N responses plants typically exhibit. In this review, we provide an updated overview of mechanisms by which nitrate is sensed and transported throughout the plant. We discuss signaling components and how nitrate sensing crosstalks with hormonal pathways for developmental responses locally and globally in the plant. Understanding how nitrate impacts on plant metabolism, physiology, and growth and development in plants is key to improving crops for sustainable agriculture.

关键词： nitrate nitrate transporters hormones N-foraging

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iPlant Systems Biology (iPSB): An International Network Hub in the Plant Community

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Molecular Plant 2019年第6期12卷 727-730页

作者： Pascal Falter-Braun Siobhan Brady Rodrigo A.Gutierrez gloria M.coruzzi Gabriel Krouk Institute of Network Biology (INET) Helmholtz Zentrum Munchen (HMGU) 85764 Munchen-Neuherberg Germany Microbe-Host Interactions Faculty of Biology. Ludwig-Maximilians-University (LMU) Munich 82152 Planegg-Martinsried Germany Department of Plant Biology and the Genome Center University of California Davis CA 95616 USA Departamento de Genetica Molecular y Microbiologia FONDAP Center for Genome Regulation Millennium Institute for Integrative Biology Pontificia Universidad Catolica de Chile Santiago 8331150 Chile Center for Genomics and Systems Biology Department of Biology New York University New York NY 10003 USA B&PMP Univ Montpellier CNRS INRA SupAgro Montpellier France

sequenced genome of a multicellular organism (Arabidopsis Genome, 2000) completed just after those of the nematode Caenorhabditis elegans (C. elegans Sequencing Consortium, 1998) and the fruit fly Drosophila melanogaster (Adams et al., 2000). Availability of a full whole-genome sequence for the reference plant opened to plant biologists what is commonly called the post-genomic era.

关键词： Systems Biology International Network Hub Plant Community

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TARGET： A Transient Transformation System for Genome-Wide Transcription Factor Target Discovery

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Molecular Plant 2013年第3期6卷 978-980页

作者： Bastiaan O.R. Bargmann Amy Marshall-Colon Idan Efroni Sandrine Ruffel Kenneth D. Birnbaum gloria M. coruzzi Gabriel Krouk Center for Genomics and Systems Biology Department of Biology New York University New York NY 10003 USA Biochimie et Physiologie Mol~culaire des Plantes UMR 5004 CNRS/ INRA/SupAgro-M/UM2 Institut de Biologie Integrative des Plantes-Claude Grignon Montpellier France

Dear Editor, Determining the fundamental structure of gene regulatory networks （GRN） is a major challenge of systems biology. In particular, inferring GRN structure from comprehensive gene expression and transcription factor （TF）-promoter interaction data sets has become an increasingly sought-after aim in both fundamental and agronomical research in plant biology （Bonneau et al., 2007; Ruffel et al., 2010）.

关键词： TARGET Transient Transformation

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