The
            <i>Arabidopsis</i>
            NRT1.1 transporter participates in the signaling pathway triggering root colonization of nitrate-rich patches

Remans, Tony; Nacry, Philippe; Pervent, Marjorie; Filleur, Sophie; Diatloff, Eugene; Mounier, Emmanuelle; Tillard, Pascal; Forde, Brian G.; Gojon, Alain

doi:10.1073/pnas.0605275103

Cited by 480 publications

(478 citation statements)

References 42 publications

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“…The changes in root architecture due to low phosphorus or patchy nitrogen are well documented (Casimiro et al, 2003;Ló pez-Bucio et al, 2003). Under patchy nitrogen conditions, a MADS box transcription factor, ANR1, may be important in controlling the proliferation of roots (Zhang and Forde, 1998;Remans et al, 2006). Auxin has been previously implicated in response to phosphate deprivation (Ló pez- Bucio et al, 2002;Ló pez-Bucio et al, 2005).…”

Section: Myb77 Plays a Role In Root Response To Nutrient Deprivationmentioning

confidence: 99%

TheArabidopsisTranscription Factor MYB77 Modulates Auxin Signal Transduction

et al. 2007

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Auxin is a key plant hormone that regulates plant development, apical dominance, and growth-related tropisms, such as phototropism and gravitropism. In this study, we report a new Arabidopsis thaliana transcription factor, MYB77, that is involved in auxin response. In MYB77 knockout plants, we found that auxin-responsive gene expression was greatly attenuated. Lateral root density in the MYB77 knockout was lower than the wild type at low concentrations of indole-3-acetic acid (IAA) and also under low nutrient conditions. MYB77 interacts with auxin response factors (ARFs) in vitro through the C terminus (domains III and IV) of ARFs and the activation domain of MYB77. A synergistic genetic interaction was demonstrated between MYB77 and ARF7 that resulted in a strong reduction in lateral root numbers. Experiments with protoplasts confirmed that the coexpression of MYB77 and an ARF C terminus enhance reporter gene expression. R2R3 MYB transcription factors have not been previously implicated in regulating the expression of auxin-inducible genes. Also it was previously unknown that ARFs interact with proteins other than those in the Aux/IAA family via conserved domains. The interaction between MYB77 and ARFs defines a new type of combinatorial transcriptional control in plants. This newly defined transcription factor interaction is part of the plant cells' repertoire for modulating response to auxin, thereby controlling lateral root growth and development under changing environmental conditions.

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Section: Myb77 Plays a Role In Root Response To Nutrient Deprivationmentioning

confidence: 99%

TheArabidopsisTranscription Factor MYB77 Modulates Auxin Signal Transduction

et al. 2007

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“…More recently, the N-responsive CLAVATA3/ESR (CLE) peptides and the CLAVATA1 (CLV1) leucine-rich repeat receptor-like kinase signaling module were identified as playing a crucial role in the development of the lateral root system in N-poor environments (Araya et al 2013). Additionally, the nitrate transporters NRT1.1 (Remans et al 2006a;Krouk et al 2010) and NRT2.1 (Little et al 2005;Remans et al 2006b) are known to be crucial in nitrate sensing, independent of their uptake function (Malamy and Ryan 2001;Miller et al 2007). Our studies indicate that different winter rapeseed varieties show different reactions to low and high nitrogen concentrations (Fig.…”

Section: Genetic Control Of Traits Related To Nitrogen Uptake Efficiencymentioning

confidence: 99%

Nitrogen use efficiency in rapeseed. A review

Bouchet

Laperche

Bissuel-Bélaygue

et al. 2016

Agron. Sustain. Dev.

164

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Mineral nitrogen fertilization has improved crop yield over the last century but has also caused air and water pollution. Reduction of nitrogen inputs and maintaining high yields are therefore essential to ensure a more sustainable agriculture. Improving the nitrogen use efficiency (NUE) of crops is therefore needed. Rapeseed, Brassica napus, depends on nitrogen fertilization due to its low NUE, with the ratio of plant nitrogen content to nitrogen supplied often not exceeding 60 %. Here, we review the major phenotypic traits associated with NUE in B. napus, with special emphasis on winter oilseed rape. We discuss the genetic diversity available and potential breeding strategies. The major points are the following: (1) rapeseed seed yield elaboration is complex, with overlapping phases of nitrogen uptake and remobilization during the crop cycle; (2) traits related to nitrogen uptake, such as root length and the amount of nitrogen absorbed after flowering, and traits related to nitrogen remobilization, such as the "staygreen" phenotype, have been identified as possible levers to improve NUE in rapeseed; (3) a substantial body of studies investigating the genetic control of NUE traits have already published and potential candidate genes identified; and (4) rapeseed genetic diversity may be enriched by exploiting interpopulation genetic variation and the closely related gene pools of Brassica rapa and Brassica oleracea.

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“…Experimental studies must therefore expose roots to heterogeneous physical or chemical environments. Split root systems (Remans et al, 2006;Girin et al, 2010;Ruffel et al, 2011) or artificial granular media are examples of systems available to understand the effects of environments on root development. However, ensuring concentrations of nutrients in growth media are within the levels recorded in soil would help to guarantee that root responses observed are physiologically relevant.…”

Section: Which Growth Media and Conditions To Study Roots?mentioning

confidence: 99%

Analyzing Lateral Root Development: How to Move Forward

et al. 2012

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Roots are important to plants for a wide variety of processes, including nutrient and water uptake, anchoring and mechanical support, storage functions, and as the major interface between the plant and various biotic and abiotic factors in the soil environment. Therefore, understanding the development and architecture of roots holds potential for the manipulation of root traits to improve the productivity and sustainability of agricultural systems and to better understand and manage natural ecosystems. While lateral root development is a traceable process along the primary root and different stages can be found along this longitudinal axis of time and development, root system architecture is complex and difficult to quantify. Here, we comment on assays to describe lateral root phenotypes and propose ways to move forward regarding the description of root system architecture, also considering crops and the environment.Root system architecture is a key determinant of nutrient and water use efficiency and describes, on a macro scale, the organization of the primary root and root-and stemderived branches where they are present in monocots and dicots (Hochholdinger et al., 2004;De Smet et al., 2006;Hochholdinger and Zimmermann, 2008;Pé ret et al., 2009;Coudert et al., 2010

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The Arabidopsis NRT1.1 transporter participates in the signaling pathway triggering root colonization of nitrate-rich patches

Abstract: Localized proliferation of lateral roots in NO 3؊ -rich patches is a adaptive root development ͉ ANR1 signaling pathway ͉ plant growth ͉ nitrate sensing ͉ nitrogen nutrition

Cited by 480 publications

References 42 publications

TheArabidopsisTranscription Factor MYB77 Modulates Auxin Signal Transduction

TheArabidopsisTranscription Factor MYB77 Modulates Auxin Signal Transduction

Nitrogen use efficiency in rapeseed. A review

Analyzing Lateral Root Development: How to Move Forward

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