Mr Alan Gay

Mr Alan Gay

Senior Research Scientist

Contact Details


Plant and crop physiologist with wide interests including photosynthesis, stomatal responses, senescence, cold hardening, crop modelling and growth measurements. Currently working on the use of hyperspectral reflectance of leaves and crops as a diagnostic tool particularly when collected from manned and unmanned aerial platforms as an aid to environmental, vegetation, crop and forestry monitoring and management. Has developed expertise in biological image analyses and interpretation for various uses.

Research Groups


Detection of faecal and gut contamination on chicken carcasses using a chlorophyll-based markerMorgan, S., Theobald, V., Leemans, D., Gay, A. & Scollan, N. 2016 p. 539
Polyphenol oxidase-mediated protection against oxidative stress is not associated with enhanced photosynthetic efficiencyBoeckx, T., Webster, R., Winters, A., Webb, J., Gay, A. & Kingston-Smith, A. 2015 In : Annals of Botany.116, 4, p. 529-54012 p.
The potential of novel Festulolium (2n=4x=28) hybrids as productive, nutrient-use-efficient fodder for ruminantsHumphreys, M. W., O'Donovan, S. A., Farrell, M. S., Gay, A. P. & Kingston-Smith, A. H. 2014 In : Food and Energy Security.3, 2, p. 98-11013 p.
Objective Definition of Rosette Shape Variation Using a Combined Computer Vision and Data Mining ApproachCamargo-Rodriguez, A., Papadopoulou, D., Spyropoulou, Z., Vlachonasios, K., Doonan, J. H., Gay, A. P. & Candela, H. (ed.) 2014 In : PLoS One.9, 5, p. e96889
Challenges of Crop Phenomics in the Post-genomic EraGegas, V. C., Gay, A., Camargo, A. & Doonan, J. 2014 Phenomics. Hancock, J. (ed.). Taylor & Francis, p. 142-17130 p.
The development of chlorophyll-based markers in poultry diets to aid detection of fluorescent fecal contaminationLee, M. R. F., Leemans, D., Theobald, V. J., Fleming, H. R. & Gay, A. P. 2013 In : Poultry Science.92, 12, p. 3251-3258
Stomatal lock-up following pathogenic challenge: Source or symptom of costs of resistance in crops?Mur, L. A. J., Simpson, C., Gay, A., Paveley, N., Sanchez-Martin, J. & Prats, E. 2013 In : Plant Pathology.62, S1, p. 72-8211 p.
Variation in canopy duration in the perennial biofuel crop Miscanthus reveals complex associations with yield: Canopy duration and yield in MiscanthusRobson, P. R. H., Farrar, K., Gay, A. P., Jensen, E. F., Clifton-Brown, J. C. & Donnison, I. S. 2013 In : Journal of Experimental Biology.64, 8, p. 2373-2383
Compaction of cereal grainWychowaniec, J. K., Griffiths, I., Gay, A. & Mughal, A. 2013 In : Philosophical Magazine.93, 31-33, p. 4151-4158
Evidence of a role for foliar salicylic acid in regulating the rate of post-ingestive protein breakdown in ruminants and contributing to landscape pollutionKingston-Smith, A. H., Davies, T. E., Edwards, J. E., Gay, A. & Mur, L. A. J. 2012 In : Journal of Experimental Botany.63, 8, p. 3243-325513 p.
Incorporation of chlorophyll based markers into lamb finishing rations to aid visualization of faecal contamination in the abattoir- a spectrometric approachSagatarame, S., Leemans, L., Theobald, V. J., Fleming, H., Gay, A. & Lee, M. R. F. 2012 p. 2727 p.
EPPN: High throughput plant phenotyping facilities at AberystwythDoonan, J., Howarth, C., Camargo-Rodriguez, A., Allison, G., Swain, G., Gay, A. & Draper, J. 2012
Can polyphenol oxidase mitigate photooxidative damage under abiotic stress conditions?Boeckx, T., Kingston-Smith, A., Webster, R., Winters, A., Webb, K. & Gay, A. 2012 p. Abstract No: P1.27
Improving detection of faecal contamination of carcasses using chlorophyll based markersSagatarame, S., Gay, A. & Lee, M. R. F. 2011
Are stomatal responses the key to understanding the cost of fungal disease resistance in plants?Gay, A. P., Mur, L. A. J. & Withers, C. M. 2011 In : Journal of the Science of Food and Agriculture.91, 9, p. 1538-15403 p.
A flexible quantitative methodology for the analysis of gene-flow between conventionally bred maize populations using microsatellite markersRobson, P. R. H., Kelly, R., Jensen, E. F., Giddings, G. D., Leitch, M., Davey, C., Gay, A. P., Jenkins, G., Thomas, H. & Donnison, I. S. 2011 In : Theoretical and Applied Genetics.122, 4, p. 819-82911 p.
Development of high throughput plant phenotyping facilities at AberystwythHowarth, C. J., Gay, A. P., Draper, J. & Powell, W. 2011 Phenomics Workshop.
Choosing the number of labels in image segmentationLiu, Y., Draper, J. H., Gay, A. P., Howarth, C. & Martin, R. R. 2011
Factors affecting rates of cross-pollination in maize growing under typical UK conditions RG0124Robson, P. R., Kelly, R., Jensen, E. F., Davey, C., Gay, A. P., Thomas, H., Donnison, I. S., Leitch, M., Warren, J. M., Giddings, G. D. & Jenkins, G. 2011 Department for Environment, Food and Rural Affairs. (DEFRA Report 2011)
Blumeria graminis interactions with barley conditioned by different single R genes demonstrate a temporal and spatial relationship between stomatal dysfunction and cell deathPrats, E., Gay, A. P., Roberts, P. C., Thomas, B. J., Sanderson, R., Paveley, N., Lyngkjaer, M. F., Carver, T. L. W. & Mur, L. A. J. 2010 In : Phytopathology.100, 1, p. 21-3212 p.
Developing unmanned aerial vehicles for local and flexible environmental and agricultural monitoringEves, A. J., Stewart, T. P., Gay, A. P., Kemp, A. I., Easey, M., Angel, R., Thomas, N. J. & Pearce, D. A. 2009 p. 471-4766 p.
Non parametric stochastic expectation maximization for data clusteringBougeniere, G., Cariou, C., Chehdi, K. & Gay, A. 2008 E-business and Telecommunications. Revised Selected Papers of the 4th International Conference, ICETE 2007, Barcelona, Spain, July 28-31, 2007,. Filipe, J. & Obaidat, M. S. (eds.). p. 293-30311 p.
Nondestructive analysis of senescence in mesophyll cells by spectral resolution of protein synthesis-dependent pigment metabolismGay, A. P., Thomas, H., Roca, M., James, C. L., Taylor, J., Rowland, J. J. & Ougham, H. J. 2008 In : New Phytologist.179, 3, p. 663-67412 p.
Enemy at the Gates: Interaction-Specific Stomatal Responses to Pathogenic ChallengePrats, E., Carver, T. L. W., Gay, A. & Mur, L. 2007 In : Plant Signaling and Behavior.2, 4, p. 275-277
Modification of nitrogen remobilisation, grain fill and leaf senescence in maize (Zea mays L.) by transposon insertional mutagenensis in a protease geneDonnison, I., Gay, A., Thomas, H., Edwards, K. J., Edwards, D., Evans, C., Thomas, A. & Ougham, H. 2007 In : New Phytologist.173, 3, p. 481-49414 p.
Unsupervised non parametric data clustering by means of Bayesian inference and information theoryBougeniere, G., Cariou, C., Chehdi, K. & Gay, A. 2007 Proceedings of the International Conference on signal processing and multimedia applications (SIGMAP).Institute for Systems and Technologies of Information, Control and Communication Press, p. 101-1088 p.
Stomatal lock-open, a consequence of epidermal cell death, follows transient suppression of stomatal opening in barley attacked by Blumeria graminisPrats, E., Gay, A. P., Thomas, B. J., Mur, L. A. J. & Carver, T. L. W. 2006 In : Journal of Experimental Botany.p. 2211-222616 p.
Hyperspectral imaging in plant science: some case studies of various stresses on different species and at different scales under laboratory and natural lighting conditionsOugham, H. J., Donnison, I. S., Taylor, J., Vozel, B., Chehdi, K., Gay, A. P., Wagstaff, C., Stead, A. D., Cariou, C. & Rogers, H. J. 2006
Is hyperspectral imaging a useful technique for managing crops and monitoring grassland?Gay, A. 2006
Maintaining yield under drought stress by different mechanisms in a range of genetic sources of stay-green sorghumGalyuon, I. K. A., Gay, A., Borrell, A. K. & Howarth, C. 2005 p. S314
Changes in cold tolerance and the mechanisms of acclimation of photosystem II to cold hardening generated by anther culture of Festuca pratensis × Lolium multiflorum cultivarsRapacz, M., Gasior, D., Zwierzykowski, Z., Lesniewska-Bocianowska, A., Humphreys, M. W. & Gay, A. P. 2004 In : New Phytologist.162, 1, p. 105-11410 p.
Powdery mildew, cereal cells and sustainable crop productionCarver, T. L. W., Prats, E., Gay, A., Mur, L., Thomas, B. J. & Kunoh, H. 2004
Photoinhibition and resistance to winter damage in stay-green amenity grassesGay, A., Smith, E. L., Kingston-Smith, A., Thorogood, D., Roca, M., Ougham, H., Thomas, H., Evans, C., Davies, T. & Moss, L. 2004 Comparative Biochemistry and Physiology, Part A.Vol. 137, S170
A comparison of root and stem lodging risks among winter wheat cultivarsBerry, P. M., Spink, J. H., Gay, A. P. & Craigon, J. 2003 In : Journal of Agricultural Science.141, 2, p. 191-20212 p.
The effect of weather factors on the performance of herbicides to control Alopecurus myosuroides in winter wheatCollings, L. V., Blair, A. M., Gay, A. P., Dyer, C. J. & MacKay, W. 2003 In : Weed Research.43, 2, p. 146-1538 p.
Modelling cereal root systems for water and nitrogen capture: towards an economic optionRobinson, D., Bingham, I. J., Sylvester-Bradley, R., Foulkes, M. J., Gay, A. P., Gregory, P. J. & King, J. A. 2003 In : Annals of Botany.p. 383-3908 p.
Hyperspectral imaging and machine learning as a no-invasive screening tool to determine crop maturity, nutritional status and stressOugham, H., Gay, A., Donnison, I., Thomas, H., Evans, C. & Rowlands, J. 2003 p. AR09
Hyperspectral imaging and machine learning as a non-invasive screening tool to determine crop maturity, nutritional status and stressOugham, H., Gay, A., Donnison, I., Thomas, H., Evans, C. & Rowlands, J. 2003
To establish separate power ratings for stem and root lodging in the UK Recommended Lists for wheat: HGCA Project No. 2213 Final ReportSpinks, J., Berry, P. M., Fenwick, R. & Gay, A. 2003 Home-Grown Cereals Authority.
Estimating a crop root system from limited core samplesKing, J. A., Gay, A. P., Villalobos, J. (ed.) & Testi, L. (ed.) 2002 p. 15-184 p.
'Balancing' root and canopy growthBingham, I. J., Foulkes, M. J., Gay, A., Gregory, P. J., King, J., Robinson, D. & Sylvester-Bradley, R. 2002 p. 6.16 p.
Hyperspectral imaging as a non-invasive tool to determine crop maturity, nutritional status and stressGay, A., Donnison, I., Taylor, J., Thomas, H. & Ougham, H. 2002
Seasonal pattern of accumulation and effects of low temperatures on storage compounds in Trifolium repensBouchart, V., Macduff, J., Ourry, A., Svenning, M., Gay, A., Simon, J. C. & Boucaud, J. 1998 In : Physiologia Plantarum.104, 1, p. 65-74
Leaf senescence in a non-yellowing mutant of Festuca pratensis: implications of the stay-green mutation for photosynthesis, growth and nutrition Hauck, B., Gay, A., Macduff, J., Griffiths, C. M. & Thomas, H. 1997 In : Plant, Cell and Environment.20, 8, p. 1007-1018
Is Lolium temulentum able to avoid end product inhibition of photosynthesis?Lewis, C. E., Gay, A., Hauck, B., Causton, D. R. & Foyer, C. H. 1996 p. 13801 p.
The effect of elevated CO2 on the relationship between photosynthetic gas exchange, associated enzymes and growth of Lolium temulentum at various light levelsLewis, C. E., Gay, A., Turner, L., Foyer, C. H. & Causton, D. R. 1996 p. Paper No. 4
The effect of elevated CO2 on the relationship between photosynthetic gas exchange, associated enzymes and growth of Lolium temulentum at various light levelsLewis, C. E., Gay, A., Hauck, B., Foyer, C. H. & Causton, D. R. 1996 p. 391 p.
Leaf development in Lolium temulentum: photosynthesis in relation to growth and senescenceGay, A. & Thomas, H. 1995 In : New Phytologist.160, 2, p. 159-168
Photosynthesis and light energy dissipation in senescing leaves of grass mutants blocked in chlorophyll degradationSouriau, N., Hauck, B., Gay, A., Foyer, C. H. & Thomas, H. 1995 Photosynthesis: From Light to Biosphere. Mathis, P. (ed.). Springer Nature, p. 953-956
Biologists and statisticians working together in science for agriculture and the environmentPotter, J. F., Dhanoa, M. S., Shanmulingham, S. & Gay, A. 1995
Light-mediated delay of primary haustorium formation by Erysiphe graminis f. sp. avenaeCarver, T. L. W., Ingerson-Morris, S. M., Thomas, B. J. & Gay, A. 1994 In : Physiological and Molecular Plant Pathology.45, 1, p. 59-79
Acclimation of Lolium temulentum to enhanced carbon dioxide concentrationGay, A. & Hauck, B. 1994 In : Journal of Experimental Botany.45, 8, p. 1133-1141
Rapid changes in leaf extension growth of grasses under controlled conditions and in the fieldGay, A. & Thomas, H. 1994 p. 311 p.
Leaf Development in Lolium temulentum: Photosynthesis and Photosynthetic Proteins in Leaves Senescing under Different IrradiancesMae, T., Thomas, H., Gay, A., Makino, A. & Hidema, J. 1993 In : Plant and Cell Physiology.p. 391-399
Effect of light intensity during senescence on photosynthesis and photosynthetic proteins of Lolium temulentumGay, A., Mae, T. & Thomas, H. 1993 Crop Adaptation to Cool, Wet Climates. Wilson, D., Thomas, H. & Pithan, K. (eds.). p. 159-166
Acclimation of Lolium temulentum to enhanced carbon dioxideGay, A. & Hauck, B. 1993 CO2 and Biosphere: Advances in Vegetation Science No.14. Rozema, J., Lambers, H., van de Geijn, S. C. & Cambridge, M. L. (eds.). Springer Nature, p. 454-4552 p.
Effects of elevated carbon dioxide concentration on growth and proteins of Lolium temulentumHauck, B. & Gay, A. 1993
Modelling cold hardening and dehardening in LoliumGay, A. & Eagles, C. F. 1993
The effects of light quality on clover growth: an example of how simple modifications of standard C. E. facilities can be used in light quality studiesGay, A. 1993
Will climate affect winter survival?Eagles, C. F. & Gay, A. 1993
Respiration and photosynthesis in oats exhibiting different levels of partial resistance to Erysiphe graminis D.c. ex Merat f. sp. avenae MarchalHaigh, G. R., Carver, T. L. W., Gay, A. P. & Farrar, J. F. 1991 In : New Phytologist.119, 1, p. 129-136
Quantitative analysis of cold hardening and dehardening in LoliumGay, A. & Eagles, C. F. 1991 In : Annals of Botany.67, 4, p. 339-345
Assessment of the response to selection for leaf water conductance in Lolium perenneGay, A. 1989 In : Annals of Botany.p. 593-5986 p.
Recovery of photosynthesis during regrowth of Lolium perenneGay, A. 1988
Characterization of forages for drought resistanceThomas, H. & Gay, A. 1987 Collection, Characterization and Utilization of Genetic Resources of Temperate Forage Grass and Clover: (Lectures given at the Welsh Plant Breeding Station, Aberystwyth for an IBPGR, ECP/GR Short Course, October 1984. Tyler, B. F. (ed.). International Board for Plant Genetic Resources, p. 29-35