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Tracy Valentine
Current research interests
- Root trait responses to soil physical conditions, including changes in border cell production, exudate production, changes in root meristem and overall root structure.
- Variation in responses to physical constraints between barley mutants and cultivars.
- Utilisation of confocal microscopy and computer vision techniques to develop tools for measuring cell expansion and root elongation.
Past research
- Movement, replication and suppression of Tobacco mosaic virus and Tobacco rattle virus in tobacco and Arabidopsis. Utilisation of Tobacco rattle virus as a vector for inducing gene silencing of endogenous root development genes (Mylnefield Research Services).
- Growth and development effects of cell wall carbohydrates (University College London)
Bibliography
- Teixeira, A.; Iannetta, P.P.M.; Binnie, K.; Valentine, T.A.; Toorop, P. (In press) Myxospermous seed-mucilage quantity correlates with environmental gradients indicative of water-deficit stress: Plantago species as a model., Plant and Soil.
- Newton, A.C.; Guy, D.C.; Valentine, T.A.; McKenzie, B.M.; George, T.S.; Hackett, C.A. (2020) Identifying spring barley cultivars with differential response to tillage., Agronomy, 10, Article No. 686.
- Leybourne, D.J.; Valentine, T.A.; Bos J.I.B.; Karley, A.J. (2020) A fitness cost resulting from Hamiltonella defensa infection is associated with altered probing and feeding behaviour in Rhopalosiphum padi., Journal of Experimental Biology, 223, Article No. jeb207936.
- Leybourne, D.J.; Bos, J.I.B.; Valentine, T.A.; Karley, A.J. (2020) The price of protection: a defensive endosymbiont impairs nymph growth in the bird cherry-oat aphid, Rhopalosiphum padi., Insect Science, 27, 69-85.
- Leybourne, D.L.; Valentine, T.A.; Robertson, J.A.H.; Perez-Fernandez, E.; Main, A.M.; Karley, A.J.; Bos, J.I.B. (2019) Defence gene expression and phloem quality contribute to mesophyll and phloem resistance to aphids in wild barley., Journal of Experimental Botany, 70, 4011-4026.
- Dello Jacovo, E.; Valentine, T.A.; Maluk, M.; Toorop, P.; Lopez del Egido, L.; Frachon, N.; Kenicer, G.; Park, L.; Goff, M.; Ferro, V.A.; Bonomi, C.; James, E.K.; Iannetta, P.P.M. (2019) Towards a characterisation of the wild legume bitter vetch (Lathyrus linifolius L. (Reichard) Bässler): heteromorphic seed germination, root nodule structure and N-fixing rhizobial symbionts., Plant Biology, 2, 523-532.
- McKenzie, B.M.; Stobart, R.; Brown, J.L.; George, T.S.; Morris, N.; Newton, A.C.; Valentine, T.A.; Hallett, P.D. (2017) Platforms to test and demonstrate sustainable soil management: integration of major UK field experiments., AHDB Final Report RD-2012-3786, 178pp.
- Greenland, A.G.; Bentley, S.; Jones, H.; Karley, A.; Lee, D.; Sherlock, D.; Valentine, T.; White, C.; Young. P. (2017) New wheat root ideotypes for improved resource use efficiency and yield performance in reduced input agriculture., AHDB Project Report, Reference No. RD-2008-3575.
- Cheng, Y.H.; Jiang, Y.; Wu, Y.; Valentine, T.A.; Li, H.X. (2016) Soil nitrogen status modifies rice root response to nematode-bacteria interactions in the rhizosphere., PLoS ONE, 11, Article No. e0148021.
- Squire, G.R.; Hawes, C.; Valentine, T.A.; Young, M.W. (2015) Degradation rate of soil function varies with trajectory of agricultural intensification., Agriculture, Ecosystems and Environment, 202, 160-167.
- Griffiths, B.S.; Hallett, P.D.; Daniell, T.J.; Hawes, C.; Squire, G.S.; Mitchell, S.M.; Caul, S.; Valentine, T.A.; Binnie, K.; Adeloye, A.J.; Rustum, R.; Nevison, I. (2015) Probing soil physical and biological resilience data from a broad sampling of arable farms in Scotland., Soil Use and Management, 31, 491-503.
- Downie, H.F.; Adu, M.O.; Schmidt, S.; Otten, W.; Dupuy, L.X.; White, P.J.; Valentine, T.A. (2015) Challenges and opportunities for quantifying roots and rhizosphere interactions through imaging and image analysis., Plant, Cell and Environment, 38, 1213-1232.
- George, T.S.; Hawes, C.; Newton, A.C.; McKenzie, B.M.; Hallett, P.D.; Valentine, T.A. (2014) Field phenotyping and long-term platforms to characterise how crop genotypes interact with soil processes and the environment., Agronomy, 4, 242-278.
- Downie, H.; Valentine, T.A.; Otten, W.; Spiers, A.J.; Dupuy, L.X. (2014) Transparent soil microcosms allow 3D spatial quantification of soil microbiological processes in vivo., Plant Signaling and Behavior, 9, Article No. e29878.
- Haling, R.E.; Brown, L.K.; Bengough, A.G.; Valentine, T.A.; White, P.J.; Young, I.M.; George, T.S. (2014) Root hair length and rhizosheath mass depend on soil porosity, strength and water content in barley genotypes., Planta, 239, 643-651.
- Stobart, R.; Hallett, P.D.; George, T.S.; Morris, N.; Newton, A.C.; Valentine, T.A.; MacKenzie, B.M. (2014) Platforms to test and demonstrate sustainable soil management; integration of major UK field experiments., Crop Production in Southern Britain Meeting: Precision Decision for Profitable Cropping, Peterborough Arena, 25-26 November 2014. Aspects of Applied Biology, 127, 233-239.
- White, P.J.; George, T.S.; Dupuy, L.X.; Karley, A.J.; Valentine, T.A.; Wiesel, L.; Wishart, J. (2013) Root traits for infertile soils., Frontiers in Plant Science, 4, 193.
- Valentine, T.A.; Hallett, P.D.; Binnie, K.; Young, M.W.; Squire, G.R.; Hawes, C.; Bengough, A.G. (2012) Soil strength and macropore volume limit root elongation rates in many UK agricultural soils., Annals of Botany, 110, 259-270.
- Downie, H.; Holden, N.; Otten, W.; Spiers, A.J.; Valentine, T.A.; Dupuy, L.X. (2012) Transparent soil for imaging the rhizosphere., PLoS ONE, 7, Article No. e44276.
- Newton, A.C.; Guy, D.C.; Bengough, A.G.; Gordon, D.C.; McKenzie, B.M.; Sun, B.; Valentine, T.A.; Hallett, P.D. (2012) Soil tillage effects on the efficacy of cultivars and their mixtures in winter barley., Field Crops Research, 128, 91-100.
- Bengough, A.G.; McKenzie, B.M.; Hallett, P.D.; Valentine, T.A. (2011) Root elongation, water stress, and mechanical impedance: a review of limiting stresses and beneficial root tip traits., Journal of Experimental Botany, 62, 59-68.
- Karley, A.J.; Valentine, T.A.; Squire, G.R. (2011) Dwarf alleles differentially affect barley root traits influencing nitrogen acquisition under low nutrient supply., Journal of Experimental Botany, 62, 3917-3927.
- Wuyts, N.; Bengough, A.G.; Roberts, T.J.; Du, C.; Bransby, M.F.; McKenna, S.J.; Valentine, T.A. (2011) Automated motion estimation of root responses to sucrose in two Arabidopsis thaliana genotypes using confocal microscopy., Planta, 234, 769-784.
- Iannetta, P.P.M.; Begg, G.S.; Valentine, T.A.; Wishart, J. (2010) Sustainable disease control using weeds as indicators: Capsella bursa pastoris and Tobacco Rattle Virus., Weed Research, 50, 511-514.
- Bengough, A.G.; Hans, J.; Bransby, M.F.; Valentine, T.A. (2010) PIV as a method for quantifying root cell growth and particle displacement in confocal images., Microscopy Research and Technique, 73, 27-36.
- Valentine, T.A.; Bengough, A.G.; Hallett, P.D.; McKenzie, B.M. (2010) Root traits for a changing physical environment., Annual Report of the Scottish Crop Research Institute for 2009, pp13-14.
- White, P.J.; Bengough, A.G.; Bingham, I.J.; George, T.S.; Karley, A.J.; Valentine, T.A. (2009) Induced mutations affecting root architecture and mineral acquisition in barley., In: Shu, Q.Y. (ed.). Induced Plant Mutations in the Genomics Era. Food and Agriculture Organisation of the United Nations, Rome, Italy, pp381-384
- Valentine, T.A.; Randall, E.; Wypijewski, K.; Chapman, S.N.; Jones, J.T.; Oparka, K.J. (2007) Delivery of macromolecules to plant parasitic nematodes using a tobacco rattle virus vector., Plant Biotechnology Journal, 5, 827-834.
- Bengough, A.G.; Bransby, M.F.; Hans, J.; McKenna, S.J.; Roberts, T.J.; Valentine, T.A. (2006) Root responses to soil physical conditions; growth dynamics from field to cell., Journal of Experimental Botany, 57, 437-447.
- Iannetta, P.P.M.; Begg, G.S.; Wishart, J.; Young, M.W.; Karley, A.J.; Valentine, T.A.; Hawes, C.; Squire, G.R. (2006) Common wild plants as biodiversity indicators., Annual Report of the Scottish Crop Research Institute for 2006, pp42-43.
- Bengough, A.G.; Hallett, P.D.; McKenzie, B.M.; Valentine, T.A.; Wuyts, N. (2006) Dynamics of root-soil systems., Annual Report of the Scottish Crop Research Institute for 2006, pp40-41.
- Humphris, S.N.; Bengough, A.G.; Griffiths, B.S.; Killham, K.; Rodger, S.; Stubbs, V.; Valentine, T.A.; Young, I.M. (2005) Root cap influences root colonisation by Pseudomonas fluorescens SBW25 on maize., FEMS Microbiology Ecology, 54, 123-130.
- Valentine, T.A.; Shaw, J.; Blok, V.C.; Phillips, M.S.; Oparka, K.J.; Lacomme, C. (2004) Efficient virus-induced gene silencing in roots using a modified tobacco rattle virus vector., Plant Physiology, 136, 3999-4009.
- Bengough, A.G.; Barlow, P.W.; Cooke, D.E.L.; Griffiths, B.S.; Humphris, S.N.; Iijima, M.; Killham, K.; Rodger, S.; Stubbs, V.; Valentine, T.A.; Young, I.M. (2004) Root border cells in plant-soil interactions., Annual Report of the Scottish Crop Research Institute for 2003/2004, 160-161.
- Valentine, T.A.; Roberts, I.M.; Oparka, K.J. (2002) Inhibition of tobacco mosaic virus (TMV) in lateral roots is dependant on the propagation of a meristem-derived signal., Protoplasma, 219, 184-196.
- Gillespie, T.; Boevink, P.; Haupt, S.; Roberts, A.G.; Toth, R.; Valentine, T.A.; Chapman, S.N.; Oparka, K.J. (2002) Functional analysis of a DNA-shuffled movement protein reveals that microtubules are dispensable for the cell-to-cell movement of tobacco mosaic virus., Plant Cell, 14, 1207-1222.
- Valentine, T.A.; Dorward, M.; Oparka, K.J. (1999) The silence of the RAMs - viral suppression in root apical meristems., Annual Report of the Scottish Crop Research Institute for 1999/2000, pp132-135.
- Newton, A.C.; Guy, D.C.; Valentine, T.A.; McKenzie, B.M.; George, T.S.; Hackett, C.A. (2020) Identifying spring barley cultivars with differential response to tillage., Agronomy, 10, Article No. 686.
- Leybourne, D.J.; Valentine, T.A.; Bos J.I.B.; Karley, A.J. (2020) A fitness cost resulting from Hamiltonella defensa infection is associated with altered probing and feeding behaviour in Rhopalosiphum padi., Journal of Experimental Biology, 223, Article No. jeb207936.
- Leybourne, D.J.; Bos, J.I.B.; Valentine, T.A.; Karley, A.J. (2020) The price of protection: a defensive endosymbiont impairs nymph growth in the bird cherry-oat aphid, Rhopalosiphum padi., Insect Science, 27, 69-85.
- Leybourne, D.L.; Valentine, T.A.; Robertson, J.A.H.; Perez-Fernandez, E.; Main, A.M.; Karley, A.J.; Bos, J.I.B. (2019) Defence gene expression and phloem quality contribute to mesophyll and phloem resistance to aphids in wild barley., Journal of Experimental Botany, 70, 4011-4026.
- Dello Jacovo, E.; Valentine, T.A.; Maluk, M.; Toorop, P.; Lopez del Egido, L.; Frachon, N.; Kenicer, G.; Park, L.; Goff, M.; Ferro, V.A.; Bonomi, C.; James, E.K.; Iannetta, P.P.M. (2019) Towards a characterisation of the wild legume bitter vetch (Lathyrus linifolius L. (Reichard) Bässler): heteromorphic seed germination, root nodule structure and N-fixing rhizobial symbionts., Plant Biology, 2, 523-532.
- Cheng, Y.H.; Jiang, Y.; Wu, Y.; Valentine, T.A.; Li, H.X. (2016) Soil nitrogen status modifies rice root response to nematode-bacteria interactions in the rhizosphere., PLoS ONE, 11, Article No. e0148021.
- Squire, G.R.; Hawes, C.; Valentine, T.A.; Young, M.W. (2015) Degradation rate of soil function varies with trajectory of agricultural intensification., Agriculture, Ecosystems and Environment, 202, 160-167.
- Griffiths, B.S.; Hallett, P.D.; Daniell, T.J.; Hawes, C.; Squire, G.S.; Mitchell, S.M.; Caul, S.; Valentine, T.A.; Binnie, K.; Adeloye, A.J.; Rustum, R.; Nevison, I. (2015) Probing soil physical and biological resilience data from a broad sampling of arable farms in Scotland., Soil Use and Management, 31, 491-503.
- Downie, H.F.; Adu, M.O.; Schmidt, S.; Otten, W.; Dupuy, L.X.; White, P.J.; Valentine, T.A. (2015) Challenges and opportunities for quantifying roots and rhizosphere interactions through imaging and image analysis., Plant, Cell and Environment, 38, 1213-1232.
- George, T.S.; Hawes, C.; Newton, A.C.; McKenzie, B.M.; Hallett, P.D.; Valentine, T.A. (2014) Field phenotyping and long-term platforms to characterise how crop genotypes interact with soil processes and the environment., Agronomy, 4, 242-278.
- Downie, H.; Valentine, T.A.; Otten, W.; Spiers, A.J.; Dupuy, L.X. (2014) Transparent soil microcosms allow 3D spatial quantification of soil microbiological processes in vivo., Plant Signaling and Behavior, 9, Article No. e29878.
- Haling, R.E.; Brown, L.K.; Bengough, A.G.; Valentine, T.A.; White, P.J.; Young, I.M.; George, T.S. (2014) Root hair length and rhizosheath mass depend on soil porosity, strength and water content in barley genotypes., Planta, 239, 643-651.
- Stobart, R.; Hallett, P.D.; George, T.S.; Morris, N.; Newton, A.C.; Valentine, T.A.; MacKenzie, B.M. (2014) Platforms to test and demonstrate sustainable soil management; integration of major UK field experiments., Crop Production in Southern Britain Meeting: Precision Decision for Profitable Cropping, Peterborough Arena, 25-26 November 2014. Aspects of Applied Biology, 127, 233-239.
- White, P.J.; George, T.S.; Dupuy, L.X.; Karley, A.J.; Valentine, T.A.; Wiesel, L.; Wishart, J. (2013) Root traits for infertile soils., Frontiers in Plant Science, 4, 193.
- Valentine, T.A.; Hallett, P.D.; Binnie, K.; Young, M.W.; Squire, G.R.; Hawes, C.; Bengough, A.G. (2012) Soil strength and macropore volume limit root elongation rates in many UK agricultural soils., Annals of Botany, 110, 259-270.
- Downie, H.; Holden, N.; Otten, W.; Spiers, A.J.; Valentine, T.A.; Dupuy, L.X. (2012) Transparent soil for imaging the rhizosphere., PLoS ONE, 7, Article No. e44276.
- Newton, A.C.; Guy, D.C.; Bengough, A.G.; Gordon, D.C.; McKenzie, B.M.; Sun, B.; Valentine, T.A.; Hallett, P.D. (2012) Soil tillage effects on the efficacy of cultivars and their mixtures in winter barley., Field Crops Research, 128, 91-100.
- Bengough, A.G.; McKenzie, B.M.; Hallett, P.D.; Valentine, T.A. (2011) Root elongation, water stress, and mechanical impedance: a review of limiting stresses and beneficial root tip traits., Journal of Experimental Botany, 62, 59-68.
- Karley, A.J.; Valentine, T.A.; Squire, G.R. (2011) Dwarf alleles differentially affect barley root traits influencing nitrogen acquisition under low nutrient supply., Journal of Experimental Botany, 62, 3917-3927.
- Wuyts, N.; Bengough, A.G.; Roberts, T.J.; Du, C.; Bransby, M.F.; McKenna, S.J.; Valentine, T.A. (2011) Automated motion estimation of root responses to sucrose in two Arabidopsis thaliana genotypes using confocal microscopy., Planta, 234, 769-784.
- Iannetta, P.P.M.; Begg, G.S.; Valentine, T.A.; Wishart, J. (2010) Sustainable disease control using weeds as indicators: Capsella bursa pastoris and Tobacco Rattle Virus., Weed Research, 50, 511-514.
- Bengough, A.G.; Hans, J.; Bransby, M.F.; Valentine, T.A. (2010) PIV as a method for quantifying root cell growth and particle displacement in confocal images., Microscopy Research and Technique, 73, 27-36.
- Valentine, T.A.; Randall, E.; Wypijewski, K.; Chapman, S.N.; Jones, J.T.; Oparka, K.J. (2007) Delivery of macromolecules to plant parasitic nematodes using a tobacco rattle virus vector., Plant Biotechnology Journal, 5, 827-834.
- Bengough, A.G.; Bransby, M.F.; Hans, J.; McKenna, S.J.; Roberts, T.J.; Valentine, T.A. (2006) Root responses to soil physical conditions; growth dynamics from field to cell., Journal of Experimental Botany, 57, 437-447.
- Humphris, S.N.; Bengough, A.G.; Griffiths, B.S.; Killham, K.; Rodger, S.; Stubbs, V.; Valentine, T.A.; Young, I.M. (2005) Root cap influences root colonisation by Pseudomonas fluorescens SBW25 on maize., FEMS Microbiology Ecology, 54, 123-130.
- Valentine, T.A.; Shaw, J.; Blok, V.C.; Phillips, M.S.; Oparka, K.J.; Lacomme, C. (2004) Efficient virus-induced gene silencing in roots using a modified tobacco rattle virus vector., Plant Physiology, 136, 3999-4009.
- Valentine, T.A.; Roberts, I.M.; Oparka, K.J. (2002) Inhibition of tobacco mosaic virus (TMV) in lateral roots is dependant on the propagation of a meristem-derived signal., Protoplasma, 219, 184-196.
- Gillespie, T.; Boevink, P.; Haupt, S.; Roberts, A.G.; Toth, R.; Valentine, T.A.; Chapman, S.N.; Oparka, K.J. (2002) Functional analysis of a DNA-shuffled movement protein reveals that microtubules are dispensable for the cell-to-cell movement of tobacco mosaic virus., Plant Cell, 14, 1207-1222.
- White, P.J.; Bengough, A.G.; Bingham, I.J.; George, T.S.; Karley, A.J.; Valentine, T.A. (2009) Induced mutations affecting root architecture and mineral acquisition in barley., In: Shu, Q.Y. (ed.). Induced Plant Mutations in the Genomics Era. Food and Agriculture Organisation of the United Nations, Rome, Italy, pp381-384
- McKenzie, B.M.; Stobart, R.; Brown, J.L.; George, T.S.; Morris, N.; Newton, A.C.; Valentine, T.A.; Hallett, P.D. (2017) Platforms to test and demonstrate sustainable soil management: integration of major UK field experiments., AHDB Final Report RD-2012-3786, 178pp.
- Greenland, A.G.; Bentley, S.; Jones, H.; Karley, A.; Lee, D.; Sherlock, D.; Valentine, T.; White, C.; Young. P. (2017) New wheat root ideotypes for improved resource use efficiency and yield performance in reduced input agriculture., AHDB Project Report, Reference No. RD-2008-3575.
- Valentine, T.A.; Bengough, A.G.; Hallett, P.D.; McKenzie, B.M. (2010) Root traits for a changing physical environment., Annual Report of the Scottish Crop Research Institute for 2009, pp13-14.
- Iannetta, P.P.M.; Begg, G.S.; Wishart, J.; Young, M.W.; Karley, A.J.; Valentine, T.A.; Hawes, C.; Squire, G.R. (2006) Common wild plants as biodiversity indicators., Annual Report of the Scottish Crop Research Institute for 2006, pp42-43.
- Bengough, A.G.; Hallett, P.D.; McKenzie, B.M.; Valentine, T.A.; Wuyts, N. (2006) Dynamics of root-soil systems., Annual Report of the Scottish Crop Research Institute for 2006, pp40-41.
- Bengough, A.G.; Barlow, P.W.; Cooke, D.E.L.; Griffiths, B.S.; Humphris, S.N.; Iijima, M.; Killham, K.; Rodger, S.; Stubbs, V.; Valentine, T.A.; Young, I.M. (2004) Root border cells in plant-soil interactions., Annual Report of the Scottish Crop Research Institute for 2003/2004, 160-161.
- Valentine, T.A.; Dorward, M.; Oparka, K.J. (1999) The silence of the RAMs - viral suppression in root apical meristems., Annual Report of the Scottish Crop Research Institute for 1999/2000, pp132-135.
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