Recent Publications

Paper: Thermography methods to assess stomatal behaviour in a dynamic environment Vialet-Chabrand, SRM., & lawson, t. (2020)
Paper
Vialet-Chabrand, S. and Lawson, T. (2020). Thermography methods to assess stomatal behaviour in a dynamic environment. Journal of experimental botany, 71(7), pp.2329-2338.
Abstract:
Although thermography allows rapid, non-invasive measurements of large numbers of plants, it has not been used extensively due to the difficulty in deriving biologically relevant information such as leaf transpiration (E) and stomatal conductance (gsw) from thermograms. Methods normalizing leaf temperature using temperatures from reference materials (e.g. with and without evaporative flux) to generate stress indices are generally preferred due to their ease of use to assess plant water status. Here, a simplified method to solve dynamic energy balance equations is presented, which enables the calculation of ‘wet’ and ‘dry’ leaf temperatures in order to derive stress indices, whilst providing accurate estimates of E and gsw. Comparing stress indices and gas exchange parameters highlights the limitation of stress indices in a dynamic environment and how this problem can be overcome using artificial leaf references with known conductance. Additionally, applying the equations for each pixel of a thermogram to derive the rapidity of stomatal response over the leaf lamina in wheat revealed the spatial heterogeneity of stomatal behaviour. Rapidity of stomatal movements is an important determinant of water use efficiency, and our results showed ‘patchy’ responses that were linked to both the spatial and temporal response of gsw.
Review: role of blue and red light in stomatal dynamic behaviour 
​matthews, jsa., vialet-chabrand, srm., & lawson, t. (2020)
Review
​Matthews, J.S., Vialet-Chabrand, S. and Lawson, T. (2020). Role of blue and red light in stomatal dynamic behaviour. Journal of Experimental Botany, 71(7), pp.2253-2269.
Abstract: 
Plants experience changes in light intensity and quality due to variations in solar angle and shading from clouds and overlapping leaves. Stomatal opening to increasing irradiance is often an order of magnitude slower than photosynthetic responses, which can result in CO2 diffusional limitations on leaf photosynthesis, as well as unnecessary water loss when stomata continue to open after photosynthesis has reached saturation. Stomatal opening to light is driven by two distinct pathways; the ‘red’ or photosynthetic response that occurs at high fluence rates and saturates with photosynthesis, and is thought to be the main mechanism that coordinates stomatal behaviour with photosynthesis; and the guard cell-specific ‘blue’ light response that saturates at low fluence rates, and is often considered independent of photosynthesis, and important for early morning stomatal opening. Here we review the literature on these complicated signal transduction pathways and osmoregulatory processes in guard cells that are influenced by the light environment. We discuss the possibility of tuning the sensitivity and magnitude of stomatal response to blue light which potentially represents a novel target to develop ideotypes with the ‘ideal’ balance between carbon gain, evaporative cooling, and maintenance of hydraulic status that is crucial for maximizing crop performance and productivity. 
annual review of plant biology guard cell metabolism and stomatal function 
​lawson, t., & matthews, jsa. (2020)
Review
Lawson, T. and Matthews, J. (2020). Guard cell metabolism and stomatal function. Annual Review of Plant Biology, 71
Abstract:
The control of gaseous exchange between the leaf and external atmosphere is governed by stomatal conductance (gs); therefore, stomata play a critical role in photosynthesis and transpiration and overall plant productivity. Stomatal conductance is determined by both anatomical features and behavioral characteristics. Here we review some of the osmoregulatory pathways in guard cell metabolism, genes and signals that determine stomatal function and patterning, and the recent work that explores coordination between gs and carbon assimilation (A) and the influence of spatial distribution of functional stomata on underlying mesophyll anatomy. We also evaluate the current literature on mesophyll-driven signals that may coordinate stomatal behavior with mesophyll carbon assimilation and explore stomatal kinetics as a possible target to improve A and water use efficiency. By understanding these processes, we can start to provide insight into manipulation of these regulatory pathways to improve stomatal behavior and identify novel unexploited targets for altering stomatal behavior and improving crop plant productivity.
Review: photosynthesis in non-foliar tissues: implications for yield simkin, aj., faralli, m., ramamorthy, s., & lawson, t. (2020)
Review
​Simkin, A.J., Faralli, M., Ramamoorthy, S. and Lawson, T. (2020). Photosynthesis in non‐foliar tissues: implications for yield. The Plant Journal, 101(4), pp.1001-1015
Abstract:
Photosynthesis is currently a focus for crop improvement. The majority of this work has taken place and been assessed in leaves, and limited consideration has been given to the contribution that other green tissues make to whole‐plant carbon assimilation. The major focus of this review is to evaluate the impact of non‐foliar photosynthesis on carbon‐use efficiency and total assimilation. Here we appraise and summarize past and current literature on the substantial contribution of different photosynthetically active organs and tissues to productivity in a variety of different plant types, with an emphasis on fruit and cereal crops. Previous studies provide evidence that non‐leaf photosynthesis could be an unexploited potential target for crop improvement. We also briefly examine the role of stomata in non‐foliar tissues, gas exchange, maintenance of optimal temperatures and thus photosynthesis. In the final section, we discuss possible opportunities to manipulate these processes and provide evidence that Triticum aestivum (wheat) plants genetically manipulated to increase leaf photosynthesis also displayed higher rates of ear assimilation, which translated to increased grain yield. By understanding these processes, we can start to provide insights into manipulating non‐foliar photosynthesis and stomatal behaviour to identify novel targets for exploitation in continuing breeding programmes.
PAPER: dynamic leaf energy balance: deriving stomatal conductance from thermal imaging in a dynamic environment VIALET-CHABRAND, S., & LAWSON, T. (2019)
Paper
​Vialet-Chabrand, S. and Lawson, T. (2019). Dynamic leaf energy balance: deriving stomatal conductance from thermal imaging in a dynamic environment. Journal of experimental botany. 
Abstract:
In spite of the significant progress made in recent years, the use of thermography to derive biologically relevant traits remains a challenge under fluctuating conditions. The aim of this study was to rethink the current method to process thermograms and derive temporal responses of stomatal conductance (gsw) using dynamic energy balance equations. Time-series thermograms provided the basis for a spatial and temporal characterization of gsw responses in wheat (Triticum aestivum). A leaf replica with a known conductance was used to validate the approach and to test the ability of our model to be used with any material and under any environmental conditions. The results highlighted the importance of the co-ordinated stomatal responses that run parallel to the leaf blade despite their patchy distribution. The diversity and asymmetry of the temporal response of gsw observed after a step increase and step decrease in light intensity can be interpreted as a strategy to maximize photosynthesis per unit of water loss and avoid heat stress in response to light flecks in a natural environment. This study removes a major bottleneck for plant phenotyping platforms and will pave the way to further developments in our understanding of stomatal behaviour.
FULL publication list
(also see University of Essex webpage)
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  1. Evans, J.R. and Lawson, T. (2020). From green to gold: agricultural revolution for food security. Journal of experimental botany. pp2211-2215
  2. Flütsch S, Wang Y, Wang Y, Takemiya A, Vialet-Chabrand S, Klejchova M, Nigro A, Hills A, Lawson T, Blatt MR Santelia D. 2020. Guard cell starch degradation yields glucose for rapid stomatal opening in Arabidopsis.  Plant Cell.
  3. Ahman N, Khan MO, Islam E, Wei Z, McAusland L, Lawson T, Johnson GN, Nixon PJ. 2020. Contrasting responses to stress displayed by tobacco overexpressing algal plastid terminal oxidase in the chloroplast. Frontiers in Plant Science,   https://doi.org/10.3389/fpls.2020.00501
  4. Lawson T, Matthews JSA. 2020. Guard cell metabolism and stomatal function. Annual review of Plant Biology  71: 237-302
  5. Matthews, J.S., Vialet-Chabrand, S. and Lawson, T., 2020. Role of Blue and Red Light in Stomatal Dynamic Behaviour. Journal of Experimental Botany.
  6. Falco WF,  Scherer MD, Oliveira SL, Wender H, Colbeck I, Lawson T,  Caires ARL 2020. Phytotoxicity of silver nanoparticles on Vicia faba: evaluation of particle size effects on photosynthetic performance and leaf gas exchange.  Science of the Total Environment. 701.  134816
  7. Vialet-Chabrand, S. and Lawson, T., 2020. Thermography methods to assess stomatal behaviour in a dynamic environment. Journal of Experimental Botany.
  8. Stevens J, Faralli M, Wall S, Stamford JD, Lawson T. 2020 Stomatal Responses to Climate Change.  Photosynthesis, Respiration and Climate change. Springer.
  9. Murray M, Soh WK, Yiotis C, Spicer RA, Lawson T, McElwain JC. 2020 Consistent relationship between field-measured stomatal conductance and theoretical maximum stomatal conductance in C3 woody angiosperms in four major biomes. Int. J. Plant Sci. 181(1):000–000.
  10. Simkin AJ, Faralli M, Ramamoorthy S, Lawson T. 2020. Photosynthesis in non-foliar tissues: implications for yield. The Plant Journal. In Press.
  11. Faralli M, Lawson T. 2019 Natural genetic variation in photosynthesis: an untapped resource to increase crop 2 yield potential? The Plant Journal. In Press
  12. McAusland L., Atkinson JA, Lawson T., Murchie E. 2019 High throughput procedure utilising chlorophyll fluorescence imaging to phenotype dynamic photosynthesis and photoprotection in leaves under controlled gaseous conditions. Plant Methods. 15: 109.
  13. Matthew JSA, Lawson T 2019 Climate change and stomatal physiology. Ann P Rev 2: 1-39.
  14. Soh WK, Yiotis C, Murray M Parnell A, Wright IJ, Spicer RA, Lawson T, Caballero R, McElwain JC. (2019) Rising CO2 rise drives divergence in water-use efficiency of evergreen and deciduous plants.  Science Advances.  In press.
  15. Vialet-Chabrand, S, Lawson T. 2019.  Dynamic leaf energy balance: deriving stomatal conductance from thermal imaging in a dynamic environment.  Journal of Exp. Bot. 
  16. Faralli M, Cockram J, Ober E, Wall S, Galle A, Van Rie J, Raines CA, Lawson T. 2019. Genotypic, developmental and environmental effects on the rapidity of gs in wheat: impacts on carbon gain and water-use efficiency.  Frontiers in Plant Science
  17. Murray M, Soh WK, Yiotis C, Batke S, Parnell A, Spicer RA, Lawson T, Caballero R, Wright IJ, Purcell C, McElwain JC. 2019. Convergence in Maximum Stomatal Conductance of C3 Woody Angiosperms in Natural Ecosystems Across Bioclimatic Zones. Frontiers in Plant Science, 10, 558.
  18. van Wesemael J, Kissel E, Eyland D, Lawson T, Swennen R, Carpentier S. 2019. Using growth and transpiration phenotyping under controlled conditions to select water efficient banana genotypes. Frontiers in Plant Science,
  19. Faralli M, Matthews J, Lawson T. 2019. Natural variation in stomatal conductance to improve crop productivity.  Current Opinions in Plant biology. 49: 1-7.
  20. Vialet-Chabrand, S., Lawson, T. 2019. Dynamic leaf energy balance: deriving stomatal conductance from thermal imaging in a dynamic environment. Journal of Experimental Botany.     
  21. Bretherton L, Poulton AJ, Lawson T, Rukminasari N, Balestreri C, Brownlee C, Moore M, Suggest  DJ. 2019. Day length as a key factor moderating the response of coccolithophore growth to elevated CO2. Limnology and Oceanography.      
  22. Lawson, T. Vialet-Chabrand S, 2019. Speedy stomata, photosynthesis and plant water use efficiency. New Phytologist.  Invited Tansley Insight. 221: 93-98    
  23. Walker BJ, Busch FA, Driever SM, Kromdijk J, Lawson T. Survey of tools for measuring in Vivo photosynthesis 2018. In Photosynthesis: Methods and Protocols.  Springer.  Editor Sarah Covshoff.
  24. Boatman TG, Davey PA, Lawson T, Geider RJ. 2018. CO2 modulation of the rates of photosynthesis and light-dependent O2 consumption in Trichodesmium. J. Exp Botany.  70: 589-597
  25. Pennacchi JP, Carmo-Silva E, Andralojc PJ, Lawson T, Allen AM, Raines CA, Parry MAJ. (2018).  Stability of wheat grain yields over three field experiments in the UK.  Food and Energy Security. 
  26. Lawson T, Vialet-Chabrand S.  Chlorophyll fluorescence Imaging (2018). Invited book chapter. In Photosynthesis: Methods and Protocols.  Springer.  Editor Sarah Covshoff.
  27. Lawson T, Terashima I, Fujita T, Wang Y.  2018. Co-ordination between photosynthesis and stomatal behaviour.  Invited Book chapter. The Leaf:  A Platform for Performing Photosynthesis and Feeding the Plant” as part of the Advances in Photosynthesis and Respiration series (editors Thomas D. Sharkey and Govindjee. Accepted
  28. Boatman TG, Mangan NM, Lawson T, Geider R. 2018.  Inorganic carbon and pH dependency of photosynthetic rates in Trichodesmium. J. Exp.  Bot. Ery141.
  29. Keys M, Tilstone G, Findlay H, Widdicombe CE, Lawson T. 2018 Effects of elevated CO2 and temperature on phytoplankton community biomass, species composition and photosynthesis during an autumn bloom in the Western English Channel.  Biogeosciences
  30. Murchie EH, Kefauver S , Araus Ortega JLA, Muller O, Rascher U, Flood PJ, Lawson T. 2018  Measuring the dynamic photosynthome.  Annals of Botany.  122. 207-220.
  31. Boatman TG, Davey PA, Lawson T, Geider R. 201.  The physiological cost of diazotrophy for Trichodesmium erythraeum IMS101. PLOS1 In press.
  32. Boatman TG, Oxborough K, Gledhill M, Lawson T, Geider R. 2018. An integrated response of Trichodesmium erythraeum IMS101 growth and photo-physiology to iron, CO2 and light intensity.  Frontiers in Microbiology
  33. Matthews JS, Vialet-Chabrand SR, Lawson T, 2018. Acclimation to fluctuating light impacts the rapidity and diurnal rhythm of stomatal conductance. Plant Physiology, pp.pp-01809.
  34. Ferguson JN, Humphry M, Brendel O, Lawson T, Bechtold U. 2018. Natural variation of life history trait and water consumption in Arabidopsis. Plant Direct. 2 (1).
  35. Wang Y, Hills A, Vialet-Chabrand S, Papanatsiou M, Griffiths H, Rogers S, Lawson T, Lew VL. and Blatt MR, 2017. Unexpected Connections between Humidity and Ion Transport Discovered using a Model to Bridge Guard Cell-to-Leaf Scales. The Plant Cell, 29(11), pp.2921-2939.
  36. Archer SD, Stefels J, Airs RL, Lawson T, Smyth TJ, Ress AP, Geider RJ. 2017. Limitation of DMSP synthesis at high irradiance in natural phytoplankton communities of the Tropical Atlantic.  Limnology and Oceanography.  63: 227-242.
  37. Simkin AJ, McAusland L, Lawson T, Raines CA. 2017. Over-expression of the Rieske iron sulphur protein increases electron transport rates, photosynthetic CO2 assimilation and yield in Arabidopsis thaliana.  Plant Physiology. 17:134-145.
  38. Keys M, Tilstone G, Findlay H, Widdicombe CE, Lawson T. 2017. Effects of elevated CO2 on phytoplankton community biomass and species composition during a spring Phaeocystis spp. bloom in the western English Channel.  Harmful Alage. 67: 92-106.
  39. Carmo-Silva E, Andralojc JP, Scales JC, Driever SM, Mead A, Lawson T, Raines CA, Parry MA. 2017. Phenotyping of field-grown wheat in the UK highlights contribution of light response of photosynthesis and flag leaf longevity to grain yield.  Journal of Experimental Botany. 68: 3473-3486.
  40. Caspari OD, Meyer MT, Tolleter D, Wittkopp TW, Cunnifee NJ, Lawson T, Grossman AR, Griffiths H. 2017  Pyrenoid loss in Chlamydomonas reinhardtii causes limitations in CO2 supply, but not thylakoid operating efficiency.  Journal of Experimental Botany. 68 (14), 3903-3913
  41. Boatman, T, Lawson T, Geider, R. 2017.  A Key Marine Diazotroph in a Changing Ocean: The Interacting Effects of Temperature, CO2 and Light on the Growth of Trichodesmium erythraeum IMS101. PLOS
  42. Matthews JA, Vialet-Chabrand, SR, Lawson T. 2017. Diurnal variation in gas exchange: the balance between carbon fixation and water loss. Plant Physiology 174: 614-623.
  43. Silvère Vialet-Chabrand, Yizhou Wang, Adrian Hills, Howard Griffiths, Virgilio L. Lew, Lawson T, Blatt MR, and Rogers S. 2017. Global Sensitivity Analysis of OnGuard Systems Models Identifies Key Interaction Nodes in Stomatal Regulation. Plant Physiology. pp-00170.
  44. Simkin, AJ, Lopez-Calcagno, PE, Davey, PA, Headland, LR, Lawson , T, Timm, S, Bauwe, H. and Raines, CA, 2016. Simultaneous stimulation of the SBPase, FBP aldolase and the photorespiratory GDC‐H protein increases CO2 assimilation, vegetative biomass and seed yield in Arabidopsis. Plant Biotechnology Journal. 15: 805-816.
  45. Vialet-Chabrand, SR, Matthews, JA. McAusland L, Blatt, M, Griffiths, H, Lawson T. 2017. Temporal dynamics of stomatal behaviour: modelling, and implications for photosynthesis and water use. Plant Physiology. 174: 603-613
  46. Driever, SM, Simkin, A, Alotaibi, S, Fisk, SJ, Madgwick, PJ, Sparks, CA, Jones, HD, Lawson, T, Parry, MAJ, Raines, CA. 2017.  Increased SBPase activity improves photosynthesis and grain yield in wheat grown in greenhouse conditions.  Phi. Trans. R. Soc. B.  372: 20160384.
  47. Lopez-Calcagno, Omar A, Lawson T, Raines CA. 2017. Arabidopsis CP12 mutants have reduced levels of phosphoribulokinase and impaired function of the Calvin Benson cycle. Journal of Experimental Botany.  68: 2285-2298.
  48. Vialet-Chabrand, SR, Matthews, JS, Simkin, A., Raines CA, Lawson T. 2017. Importance of fluctuations in light on plant photosynthetic acclimation.  Plant Physiology.  173: 2163-2179.
  49. Jacobs M, Lopez-Garcia M, Phrathep O-P, Lawson T, Oulton R, Whitney HM. 2016. Photonic crystal structure of Begonia chloroplasts enhances photosynthetic efficiency.  Nature Plants.  2: 16162.
  50. Santelia D, Lawson T. 2016.  Rethinking guard cell metabolism.  Plant Physiology. 172: 1371-1392.
  51. Camp E, Dong L, Suggett D, Smith D, Boatman T, Scorfield, S, Walinkjar A, Wood H, Lawson T. 2016. A novel membrane inlet-infrared gas analysis (MI-IRGA) system for monitoring of seawater carbonate system.  Limnology and Oceanography: methods. 5: 38-53.
  52. Elliott-Kingston C, Haworth M, Yearsley JM, Batke SP, Lawson T, McElwain JC. 2016. Does size matter?  Stomatal closing speed may be driven by atmospheric CO2 during diversification and not by stomatal size. Frontiers in Plant Science. 7:
  53. Vialet-Chabrand S, Matthews JSA, Brendel O, Blatt M, Wang Y, Hills A, Griffiths H, Rogers S, Lawson T. 2016.  Modelling water use efficiency in a dynamic environment: An example using Arabidopsis thaliana. Plant Science. 251: 65-74.
  54. Queiroz AM, Mezacsasa AV, Graciano DE, Falco WF, M’Peko J-C, Guilmaraes FEG, Lawson T, Colbeck I, Oliveira SL, Caires ARL.  2016. Quenching of chlorophyll fluorescence induced by silver nanoparticles.  Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy. ISSN 1386-1425 168: 73-77.
  55. Lawson T, McElwain JC. (2016). Evolutionary trade-offs in stomatal spacing.  Commentary New Phytologist. 210: 1149-1151
  56. McAusland L, Vialet-Chabrand, S, Davey PA, Baker NR, Brendel, O, Lawson T. (2016).  Effects of kinetics of light light-induced stomatal responses on photosynthesis and water-use efficiency. New Phytologist. 211: 1209-1220.
  57. Webster R, Driever S, Kromdijk J, McGrath J, Leakey A, Siebke K, Demetriades-Shah T, Bonnage S, Peloe T, Lawson T, and Long S. High C3 photosynthetic capacity and high intrinsic water use efficiency underlies the high productivity of the bioenergy grass Arundo donax." Nature Scientific Reports.   6: 20694.
  58. Bechtold U, Penfold CA, Jenkins D, Legaie R, Moore JD, Lawson T, Matthews JSA, Vialet-Chabrand SRM, Baxter L, Subramaniam S,. Hickman R, Florance H, Sambles C, Salmon DL, Feil R, Bowden L, Hill C, Baker NR, Lunn JE, Frinkenstadt B, Mead AM, Buchanan-Wollaston V, Beynon J,  Rand DA, Wild D, Denby K, Ott S, Smirnoff N and Mullineaux PM 2016 . Time-series transcriptomics reveals that AGAMOUS-LIKE22 affects primary metabolism and developmental processes in drought-stressed Arabidopsis. Plant Cell.  28: 345–366.
  59. Horrer D, Flutsch S, Pazmino D, Matthews JSA, Thalmann M, Nigro A, Leonhardt N, Lawson T, Santelia D. 2016.  Blue light induces a distinct starch degradation pathway in guard cells for stomatal opening. Current Biology.  26: 362- 370
  60. Minguet-Parramona C, Wang Y, Hills A, Vialet-Chabrand S, Griffiths H, Lew V, Rogers S, Lawson T, Lew VL and Blatt MR. 2016. An optimal frequency in Ca2+ oscillations for stomatal closure is an emergent property of Ion Transport in Guard cells. 2016. Plant Physiology; 33-42.
  61. Sosan, A., Svistunenko, D., Straltsova, D., Tsiurkina, K., Smolich, I., Lawson, T., Subramaniam, S., Golovko, V., Anderson, D., Sokolik, A. and Colbeck, I., 2015. Engineered silver nanoparticles are sensed at the plasma membrane and dramatically modify physiology of Arabidopsis thaliana plants. The Plant Journal.
  62. Beddow J, Johnson RJ, Lawson T, Breckels MN, Webster RJ, Smith BE, Rowland SJ, Whitby C 2016. The effect of oil sands process-affected water and model naphthenic acids on photosynthesis and growth in Emiliania huxlyei and Chlorella vulgaris. Chemosphere 145: 416-423.
  63. Minguet-Parramona C, Wang Y, Hills A, Vialet-Chabrand S,Griffiths H, Lew V, Rogers S, Lawson T, and Blatt MR. 2015 Emergent oscillatory properties in modelling ion transport of guard cells. Rhythm in plants: Dynamic responses in a dynamic environment. Ed. Mancuso S., Shabala S. Springer. Pp 323.
  64. Litthauer S, Battle M, Lawson T, Jones MA. 2015  Phototropins Maintain Robust Circadian Oscillation of PSII Operating Efficiency Under Blue Light. The Plant journal : for cell and molecular biology, 83 (6). pp. 1034-1045. ISSN 1365-313X
  65. McAusland, L, Vialet-Chabrand SRM, Matthews JSA, Lawson T 2015. Spatial and temporal responses in stomatal behaviour, photosynthesis and implications for water use efficiency. Rhythm in plants: Dynamic responses in a dynamic environment. Ed. Mancuso S., Shabala S. Springer. Pp 97.
  66. McElwain J,Yiotis C Lawson T. 2016.  Using modern plant trait relationships between observed and theoretical maximum stomatal conductance and vein density to examine patterns of plant macroevolution. New Phytologist. 209: 94-103.
  67.  de Torres-Zabala M, Littlejohn G, Jayaraman S, Bailey T, Lawson T, Studholme D, Tillich M, Licht D, Bölter B, Delfino L, Truman W, Mansfield J, Smirnoff N, Grant M. 2015. Photosynthesis is central to plant defence and pathogen effectors target the chloroplast.  Nature plants 1. 1.15074  doi:10.1038/nplants.2015.74
  68. Simkin AJ, McAusland L, Headland LR, Lawson T, Raines CA. 2015. Multigene manipulation of photosynthetic carbon assimilation increases CO2 fixation and biomass yield in tobacco.  Journal of Experimental Botany, 66: 4075-4090.
  69. Khozeai M, Fisk S, Lawson  T, Gibon Y, Sulpice R, Stitt M, Lefebvre SC, Raines CA. 2015.  Over expression of plastid transketolase in tobacco results in a thiamine auotrophic phenotype. Plant Cell. 27, 432-447.
  70. Driever SM1, Lawson T1*, Andralojc PA, Raines CA, Parry MA. 2014. Natural variation in photosynthetic capacity, growth and yield in 64 field grown wheat genotypes.  J Exp. Botany. 65, 4959-4973. 1 joint first author *corresponding author
  71. Lawson T, Simkin AJ, Gilor K, Grant DA. 2014 Mesophyll photosynthesis and guard cell metabolism impacts on stomatal behaviour. Tansley review. New Phytologist. 203: 1064-1081.
  72. Lawson T & Blatt. M 2014. Stomatal size, speed and responsiveness impact on photosynthesis and water use efficiency. Plant Physiol. 164: 1556-1570.
  73. Zambrano AB, Lawson T, Olmos E, Fernandez N, Borland AM. 2014. Differentiated leaf anatomy accommodates photosynthetic plasticity in the engagement of crassulacean acid metabolism in tropical trees of the genus Clusia. Journal of Experimental Botany. 65: 3513-3523.
  74. Gorecka M, Alvarez-Fernandez R, Slattery K, McAusland L, Davey PA, Karpinski S, Lawson T, Mullineaux PM. 2014. Abscisic acid signalling is primarily confined to bundle sheath cells in high light-exposed Arabidopsis leaves. Proceedings for the Royal Society. 369: 1471-2970.
  75. Yates SA, Chernukhin I, Alvarez-Fernandez R, Bechtold U, Baeshen M, Baeshen  N, Mutwakil MZ, Sabir J, Lawson T, Mullineaux PM. 2014. The temporal foliar transcriptome of the perennial C3 desert plant Rhazya stricta in its natural environment. BMC Plant Biology.14: 2-22.
  76. Lawson T, Davey PA, Yates SA, Bechtold U, Baeshen M, Baeshen  N, Mutwakil MZ, Sabir J, Baker NR, Mullineaux PM. 2014. C3 photosynthesis in the desert plant Rhazya stricta is fully functional at high temperatures and light intensities. New Phytologist. 201: 862-873.
  77. McAusland L, Davey PA, Kanwal N, Baker NR, Lawson T. 2013. A novel system for spatial and temporal imaging of intrinsic plant water use. Journal of Experimental Botany. 64: 4993-5007.
  78. Murchie EH & Lawson T.  2013.  Chlorophyll fluorescence analysis: a guide to good practice and understanding some new applications. Journal of Experimental Botany.  64: 3983-3998.
  79. Bechtold U,  Albihlal WS, Lawson T, Fryer MJ, Sparrow PAC, Richard F, Persad R, Bowden L, Hickman R, Martin C, Beynon JL, Buchanan-Wollaston V, Baker NR, Morison JIL, Schöffl F, Ott S, Mullineaux PM. (2013).  Arabidopsis HEAT SHOCK TRANSCRIPTION FACTORA1b overexpression enhances water productivity, resistance to drought, and infection. Journal of Experimental Botany. 64: 3467-3481.
  80. Read et al (incl. Lawson T). 2013. Emiliania’s pan genome drives the phytoplankton’s global distribution. Nature. doi:10.1038/nature12221
  81. Honey DJ, Gledhill M, Bibby TS, Legiret F-C, Pratt N, Hickmann A, Lawson T, Achterberg EP. 2013. Heme b in marine phytoplankton and particulate material from the North Atlantic Ocean. Marine Ecology Progress Series. 484, 1-36
  82. McKew BA, Davey P, Finch SJ, Hopkins J, Lefebvre SC, Metodiev MV, Oxborough K, Raines CA, Lawson T, Geider RJ. (2013). The trade-off between light-harvesting and photoprotective functions of fucoxanthin-chlorophyll proteins dominates light acclimation in Emiliania huxleyi (clone 1516). 200:74-85.
  83. Chronopoulou PM, Fahy A, Coulon F, Païssé S, Goñi-Urriza M, Peperzak L, Acuña-Alvarez L, McKew BA, Lawson T, Timmis KN, Duran R, Underwood GJC & McGenity TJ. (2013). Impact of a simulated oil spill on benthic phototrophs and nitrogen-fixing bacteria in mudflat mesocosms.  Environmental Microbiology. 15: 242-252.
  84. Suggett DJ, Dong L, Lawson T, Lawrenz E, Torres L, Smith DJ. 2013. Light availability determines susceptibility of reef building corals to ocean acidification. Coral Reefs: 32: 327-337.
  85. Suggett DJ, Hall-Spencer JM, Rodolfo-Metalpa R, Boatman TG, Payton R, Pettay DT, Johnson VR, Warner ME, Lawson T.(2012). Sea anemones may thrive in a high CO2 world. Global Change Biology 18: 3015-3025.
  86. Lawson T, Kramer DM, Raines CA. 2012.  Improving yield by exploiting mechanisms underlying natural variation of photosynthesis.  Current Opinions in Plant Biotechnology.  23: 215-20.
  87. Oxborough K, Moore CM, Suggett DJ, Lawson T, Chan H-G, Geider R.G. 2012.  Direct estimation of functional PSII reaction centre concentration and PSII electron flux on a volume basis: a new approach to the analysis of Fast Repetition Rate fluorometry (FRRf) data. Limnology and Oceanography. 10: 142-152.
  88. Bechtold U., Lawson T., Mejia-Carranza J., Meyer R.C., Brown IR., Altmann T., Ton J., Mullineaux PM. 2010. Constitutive salicylic acid defences do not compromise seed yield, drought tolerance and water productivity in the Arabidopsis accession C24. Plant Cell & Environment. 33, 1959-1973.
  89. Lawson T, vonCaemmerer S, Baroli I. 2010. Photosynthesis and stomatal behaviour. Progress in Botany. 72, 265-304.
  90. Galvez-Valdivieso G, Fryer MJ., Lawson T., Slattery K., Truman W., Smirnoff N., Asami T., Davies WJ., Jones AM., Baker NR., Mullineaux PM. (2009). The high light response of Arabidopsis involves ABA signalling between vascular and bundle sheath cells. The Plant Cell 21, 2143-2162.
  91. Suggett D.J., Stambler, N. & 16 other including Lawson T. (2009).Nitrogen and phosphorous limitation of oceanic microbial growth during spring in the Gulf of Aquaba. Aquatic Microbial Ecology. 56, 227-239.
  92. Lawson T. (2009) Guard cell photosynthesis and stomatal function. New Phytologist. 181, 13-34.
  93. Mullineaux P.M.& Lawson T. (2008) Measuring redox changes in vivo in leaves: prospects and technical challenges. In. Redox-mediated signal transduction: Methods and Protocls. Edt. J.T. Hancock, 467, 67-77.
  94. Lawson T., Lefebvre S., Baker N.R.. Morison J.I.L. & Raines C.A. (2008) Reductions in mesopyhyll and guard cell photosynthesis impacts on the control of stomata to light and CO2. Journal of Experimental Botany 59, 3609-3619.
  95. Morison, J.I.L. Lawson T. & Cornic G. (2007) Lateral CO2 diffusion inside dicotyledonous leaves can be substantial: Quantification in different light intensities. Plant Physiology, 145, 680-690.
  96. Morison, J.I.L. & Lawson T. (2007) “Does lateral gas diffusion in leave matter?” Plant Cell & Environment, 30, 1072-1085.
  97. Lawson T., Morison, J.I.L. (2006) Visualising patterns of CO2 diffusion in leaves. New Phytologist, 169, 641-643.
  98. Lawson T., Bryant B., Lefebvre S., Lloyd J.C. & Raines C.A. (2006) Decreased SBPase activity alters growth and development in transgenic tobacco plants. Plant, Cell & Environment 29, 48-58.
  99. Morison J.I.L, Gallouet E., Lawson T., Cornic G., Herbin R. & Baker N.R. (2005) Lateral diffusion of CO2 in leaves is not sufficient to support photosynthesis. Plant Physiology, 139, 254-266.
  100. Lefebvre S., Lawson T., Zakhlenivk O.V., Fryer M., Lloyd J.C. & Raines C.A. (2005) Increased SBPase activity in transgenic tobacco plants stimulates photosynthesis and growth during early development. Plant Physiology, 138, 451-460.
  101. Von Caemmerer S., Lawson T., Oxborough K., Baker N.R. & Raines CA (2004). Stomatal conductance does not correlate with photosynthetic capacity in transgenic tobacco with reduced amounts of Rubisco. Journal of Experimental Botany. 55, 1157-1166.
  102. Maple J., Fujiwara MT., Kitahata N., Lawson T., Baker NR., Yoshida S., Moller SM.(2004).  GAINT CHLOROPLAST 1 is essential for correct plastid division in Arabidopsis. Current Biology.  14: 776-81.
  103. Lawson T. & Morison J.I.L (2004) Stomatal Function and Physiology. In: The Evolution of Plant Physiology; from whole plants to ecosystem. Edited by Hemsley A.R. & Poole I. Elsevier Academic Press. 217-242.
  104. Lawson T., Oxborough K., Morison J.I.L. & Baker N.R. (2003) The response of guard cell photosynthesis to CO2, O2, light and water stress in a range of species are similar. J. Experimental Botany 54: 1743-1752.
  105. Lawson T., Oxborough K., Morison J.I.L. & Baker N.R. (2002) Responses of photosynthetic electron transport in stomatal guard cells and mesophyll cells in intact leaves to light, CO2 and humidity. Plant Physiology 128: 52-62.
  106. Lawson T., Craigon J., Black C.R., Colls J.J. & Landon G. (2002) Effect of elevated carbon dioxide and ozone on stomatal density and distribution on potato plants (Solanum tuberosum) grown in open-top chambers. J. Experimental Botany 52: 737-746.
  107. Vorne V., Ojanpera K., De Temmerman L., Bindi M., Hogy P., Jones M.B., Lawson T. & Persson K. (2002). Effects of elevated carbon dioxide and ozone on potato tuber quality in the Eurepoan multiple-site experiment 'CHIP'-project. European Journal of Agronomy 17: 369-381.
  108. Vandermeiren K., Black C., Lawson T., Casanova A. & Ojanpera K. (2002) Photosynthetic and stomatal responses of potatoes grown under elevated CO2 and/or O3 - results from the European CHIP -programme. European Journal of Agronomy 17: 337-352.
  109. Lawson T., Craigon J., Black C.R., Colls J.J., Tullock A-M. & Landon G. (2001) Effects of elevated carbon dioxide and ozone on the growth and yield of potatoes (Solanum tuberosum) grown in open-top chambers. Environmental Pollution 111: 479-491.
  110. Baker N.R., Oxborough K., Lawson T. & Morison J.I.L. (2001) High resolution imaging of photosynthetic activities of tissues, cells and chloroplasts in leaves. J. Experimental Botany 52: 615-621.
  111. Lawson T., Tullock A-M., Craigon J., Black C.R., Colls J.J. & Landon G. (2001) Photosynthetic responses to elevated CO2 and O3 in field-grown potato (Solanum tuberosum). Journal of Plant Physiology 158: 309-323.
  112. Donnelly A., Lawson T., Craigon J., Black C.R., Colls J.J.& Landon G. (2001) Impact of elevated CO2 and O3 on tuber quality in potato (Solanum tuberosum L.). Agriculture, Ecosystems & Environment 87: 273-285.
  113. Lawson T., Hopkins D.W, Chudek J.A., Janaway R.C. & Bell M.G. (2000) The Experimental Earthwork at Wareham, Dorest after 33 years: 3. Interaction of soil organisms with buried materials. J. Archaeological Science 27: 273-285.
  114. Poole I., Lawson T., Weyers J.D.B. & Raven J.A. (2000) Effect of elevated CO2 on the stomatal distribution and leaf physiology of Alnus glutionosa (L). Gaertn. New Phytologist 145: 511-521.
  115. Lawson T, & Weyers J.D.B. (1999) Spatial and temporal variation in gas exchange over the lower surface of Phaseolus vulgaris L. primary leaves. J. Experimental Botany 50: 1381-1391.
  116. Lawson T., James W. & Weyers J.D.B. (1998) A Surrogate Measure of Stomatal Aperture. J. of Experimental Botany 49: 1397-1403.
  117. Lawson T., Weyers J.D.B. & A’brook R. (1998) The nature of heterogeneity in stomatal behaviour of Phaseolus vulgaris L. primary leaves. J. of Experimental Botany 49: 1387-1395.
  118. Hopkins D.W, Chudek J.A., Bignell D.E., Frouz J., Webster E.A. & Lawson T. (1998) Application of 13C NMR to investigate the transformations and biodegradation of organic materials by some soil and litter dwelling insects. Biodegradation 9: 423-431.
  119. Weyers J.D.B. & Lawson T. (1997) Heterogeneity in stomatal characteristics. Advances in Botanical Research 26: 317-352.
  120. Parsons R., Weyers J.D.B., Lawson T. & Godber I.M. (1997) Rapid and Straightforward Estimates of Photosynthetic Characteristics using a Portable IRGA System. Photosynthetia 34: 265-279.
  121. Weyers J.D.B., Lawson T. & Peng Z. Y. (1997) Variation in stomatal characteristics at the whole-leaf level. SEB Seminar Series volume - Scaling Up. Edited by van Gardingen, P.R., Foody G.M., Curran, P.J., Cambridge University Press, Cambridge. 129-149.
  122. Poole I., Weyers J.D.B., Lawson T. & Raven J.A. (1996) Variations in intra- and inter-leaf stomatal density and index: implications for palaeoclimatic reconstructions. Plant, Cell & Environment 19: 705-712.
  123. Abe T., Lawson T., Weyers J.D.B. & Codd G.A. (1996) Microcystin-LR inhibits photosynthesis of Phaseolus vulgaris primary leaves: implications for current spray irrigation practice. New Phytology.