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Systems approaches reveal that ABCB and PIN proteins mediate co-dependent auxin efflux (2022)
Journal Article
Mellor, N. L., Voß, U., Ware, A., Janes, G., Barrack, D., Bishopp, A., …Band, L. R. (2022). Systems approaches reveal that ABCB and PIN proteins mediate co-dependent auxin efflux. Plant Cell, 34(6), 2309–2327. https://doi.org/10.1093/plcell/koac086

Members of the B family of membrane-bound ATP-binding cassette (ABC) transporters represent key components of the auxin-efflux machinery in plants. Over the last two decades experimental studies have shown that modifying ABCB expression affects auxin... Read More about Systems approaches reveal that ABCB and PIN proteins mediate co-dependent auxin efflux.

X-ray CT reveals 4D root system development and lateral root responses to nitrate in soil (2022)
Journal Article
Griffiths, M., Mellor, N., Sturrock, C. J., Atkinson, B. S., Johnson, J., Mairhofer, S., …Wells, D. M. (2022). X-ray CT reveals 4D root system development and lateral root responses to nitrate in soil. Plant Phenome Journal, 5(1), Article e20036. https://doi.org/10.1002/ppj2.20036

The spatial arrangement of the root system, termed root system architecture, is important for resource acquisition as it directly affects the soil zone explored. Methods for phenotyping roots are mostly destructive, which prevents analysis of roots o... Read More about X-ray CT reveals 4D root system development and lateral root responses to nitrate in soil.

Auxin fluxes through plasmodesmata modify root-tip auxin distribution (2020)
Journal Article
Mellor, N. L., Voß, U., Janes, G., Bennett, M. J., Wells, D. M., & Band, L. R. (2020). Auxin fluxes through plasmodesmata modify root-tip auxin distribution. Development, 147(6), Article dev181669. https://doi.org/10.1242/dev.181669

© 2020. Published by The Company of Biologists Ltd. Auxin is a key signal regulating plant growth and development. It is well established that auxin dynamics depend on the spatial distribution of efflux and influx carriers on the cell membranes. In t... Read More about Auxin fluxes through plasmodesmata modify root-tip auxin distribution.

A core mechanism for specifying root vascular pattern can replicate the anatomical variation seen in diverse plant species (2019)
Journal Article
Mellor, N., Vaughan-Hirsch, J., Kümpers, B. M., Help-Rinta-Rahko, H., Miyashima, S., Pekka Mähönen, A., …Bishopp, A. (2019). A core mechanism for specifying root vascular pattern can replicate the anatomical variation seen in diverse plant species. Development, 146(6), Article dev172411. https://doi.org/10.1242/dev.172411

Pattern formation is typically controlled through the interaction between molecular signals within a given tissue. During early embryonic development, roots of the model plant Arabidopsis thaliana have a radially symmetric pattern, but a heterogeneou... Read More about A core mechanism for specifying root vascular pattern can replicate the anatomical variation seen in diverse plant species.

Mobile PEAR transcription factors integrate positional cues to prime cambial growth (2019)
Journal Article
Miyashima, S., Roszak, P., Sevilem, I., Toyokura, K., Blob, B., Heo, J. O., …Helariutta, Y. (2019). Mobile PEAR transcription factors integrate positional cues to prime cambial growth. Nature, 565(7740), 490-494. https://doi.org/10.1038/s41586-018-0839-y

© 2019, Springer Nature Limited. Apical growth in plants initiates upon seed germination, whereas radial growth is primed only during early ontogenesis in procambium cells and activated later by the vascular cambium 1 . Although it is not known how... Read More about Mobile PEAR transcription factors integrate positional cues to prime cambial growth.

OpenSimRoot: widening the scope and application of root architectural models (2017)
Journal Article
Postma, J. A., Kuppe, C., Owen, M. R., Mellor, N. L., Griffiths, M., Bennett, M. J., …Watt, M. (2017). OpenSimRoot: widening the scope and application of root architectural models. New Phytologist, 215(3), 1274-1286. https://doi.org/10.1111/nph.14641

© 2017 The Authors. New Phytologist © 2017 New Phytologist Trust OpenSimRoot is an open-source, functional–structural plant model and mathematical description of root growth and function. We describe OpenSimRoot and its functionality to broaden the b... Read More about OpenSimRoot: widening the scope and application of root architectural models.

Theoretical approaches to understanding root vascular patterning: a consensus between recent models (2016)
Journal Article
Mellor, N., Adibi, M., El-Showk, S., De Rybel, B., King, J., Mähönen, A. P., …Bishopp, A. (in press). Theoretical approaches to understanding root vascular patterning: a consensus between recent models. Journal of Experimental Botany, https://doi.org/10.1093/jxb/erw410

The root vascular tissues provide an excellent system for studying organ patterning, as the specification of these tissues signals a transition from radial symmetry to bisymmetric patterns. The patterning process is controlled by the combined action... Read More about Theoretical approaches to understanding root vascular patterning: a consensus between recent models.

Dynamic regulation of auxin oxidase and conjugating enzymes AtDAO1 and GH3 modulates auxin homeostasis (2016)
Journal Article
Mellor, N. L., Band, L. R., Pěnčík, A., Novak, O., Rashed, A., Holman, T., …Owen, M. R. (2016). Dynamic regulation of auxin oxidase and conjugating enzymes AtDAO1 and GH3 modulates auxin homeostasis. Proceedings of the National Academy of Sciences, 113(39), 11022-11027. https://doi.org/10.1073/pnas.1604458113

Auxin is a key hormone regulating plant growth and development. We combine experiments and mathematical modeling to reveal how auxin levels are maintained via feedback regulation of genes encoding key metabolic enzymes. We describe how regulation of... Read More about Dynamic regulation of auxin oxidase and conjugating enzymes AtDAO1 and GH3 modulates auxin homeostasis.

Sequential induction of auxin efflux and influx carriers regulates lateral root emergence (2013)
Journal Article
Peret, B., Middleton, A. M., French, A. P., Larrieu, A., Bishopp, A., Njo, M., …Bennett, M. J. (2013). Sequential induction of auxin efflux and influx carriers regulates lateral root emergence. Molecular Systems Biology, 9(1), Article 699. https://doi.org/10.1038/msb.2013.43

In Arabidopsis, lateral roots originate from pericycle cells deep within the primary root. New lateral root primordia (LRP) have to emerge through several overlaying tissues. Here, we report that auxin produced in new LRP is transported towards the o... Read More about Sequential induction of auxin efflux and influx carriers regulates lateral root emergence.