Mr Alan Gay

Mr Alan Gay

Senior Research Scientist

Contact Details

Research

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

  • Aberystwyth Centre for Space and Earth Monitoring

Publications

Bingham, IJ, Foulkes, MJ, Gay, A, Gregory, PJ, King, J, Robinson, D & Sylvester-Bradley, R 2002, ''Balancing' root and canopy growth' 2002 Proceedings Home-Grown Cereals Authority Conference, London, 2002 - 2002, pp. 6.1.
Gay, A, Donnison, I, Taylor, J, Thomas, H & Ougham, H 2002, 'Hyperspectral imaging as a non-invasive tool to determine crop maturity, nutritional status and stress' 2002 Conference on Applications of Remote Sensing in Agriculture, London, United Kingdom of Great Britain and Northern Ireland, 2002 - 2002, .
Bouchart, V, Macduff, J, Ourry, A, Svenning, M, Gay, A, Simon, JC & Boucaud, J 1998, 'Seasonal pattern of accumulation and effects of low temperatures on storage compounds in Trifolium repens' Physiologia Plantarum, vol 104, no. 1, pp. 65-74. DOI: 10.1034/j.1399-3054.1998.1040109.x
Hauck, B, Gay, A, Macduff, J, Griffiths, CM & Thomas, H 1997, 'Leaf senescence in a non-yellowing mutant of Festuca pratensis: implications of the stay-green mutation for photosynthesis, growth and nutrition ' Plant, Cell and Environment, vol 20, no. 8, pp. 1007-1018. DOI: 10.1111/j.1365-3040.1997.tb00677.x
Lewis, CE, Gay, A, Hauck, B, Causton, DR & Foyer, CH 1996, 'Is Lolium temulentum able to avoid end product inhibition of photosynthesis?' International Conference on Transport of Photoassimilates, Canterbury, United Kingdom of Great Britain and Northern Ireland, 1995 - 1995, pp. 1380.
Lewis, CE, Gay, A, Turner, L, Foyer, CH & Causton, DR 1996, 'The effect of elevated CO2 on the relationship between photosynthetic gas exchange, associated enzymes and growth of Lolium temulentum at various light levels' Caper Meeting, Aberystwyth, United Kingdom of Great Britain and Northern Ireland, 1996 - 1996, pp. Paper No. 4.
Lewis, CE, Gay, A, Hauck, B, Foyer, CH & Causton, DR 1996, 'The effect of elevated CO2 on the relationship between photosynthetic gas exchange, associated enzymes and growth of Lolium temulentum at various light levels' SEB Annual Meeting, Lancaster, United Kingdom of Great Britain and Northern Ireland, 1996, pp. 39.
Gay, A & Thomas, H 1995, 'Leaf development in Lolium temulentum: photosynthesis in relation to growth and senescence' New Phytologist, vol 160, no. 2, pp. 159-168. DOI: 10.1111/j.1469-8137.1995.tb03037.x
Souriau, N, Hauck, B, Gay, A, Foyer, CH & Thomas, H 1995, Photosynthesis and light energy dissipation in senescing leaves of grass mutants blocked in chlorophyll degradation. in P Mathis (ed.), Photosynthesis: From Light to Biosphere. Springer Nature, pp. 953-956.
Potter, JF, Dhanoa, MS, Shanmulingham, S & Gay, A 1995, 'Biologists and statisticians working together in science for agriculture and the environment' Paper presented at Royal Statistical Society Conference, Shropshire, United Kingdom of Great Britain and Northern Ireland, 1995 - 1995, .
Carver, TLW, Ingerson-Morris, SM, Thomas, BJ & Gay, A 1994, 'Light-mediated delay of primary haustorium formation by Erysiphe graminis f. sp. avenae' Physiological and Molecular Plant Pathology, vol 45, no. 1, pp. 59-79. DOI: 10.1016/S0885-5765(05)80019-0
Gay, A & Hauck, B 1994, 'Acclimation of Lolium temulentum to enhanced carbon dioxide concentration' Journal of Experimental Botany, vol 45, no. 8, pp. 1133-1141. DOI: 10.1093/jxb/45.8.1133
Gay, A & Thomas, H 1994, 'Rapid changes in leaf extension growth of grasses under controlled conditions and in the field' 1995 Society for Experimental Botany Meeting , Swansea, United Kingdom of Great Britain and Northern Ireland, 1994 - 1994, pp. 31.
Mae, T, Thomas, H, Gay, A, Makino, A & Hidema, J 1993, 'Leaf Development in Lolium temulentum: Photosynthesis and Photosynthetic Proteins in Leaves Senescing under Different Irradiances' Plant and Cell Physiology, pp. 391-399.
Gay, A, Mae, T & Thomas, H 1993, Effect of light intensity during senescence on photosynthesis and photosynthetic proteins of Lolium temulentum. in D Wilson, H Thomas & K Pithan (eds), Crop Adaptation to Cool, Wet Climates. pp. 159-166, EC COST 814 Workshop, Aberystwyth, United Kingdom of Great Britain and Northern Ireland, 1993.
Gay, A & Hauck, B 1993, Acclimation of Lolium temulentum to enhanced carbon dioxide. in J Rozema, H Lambers, SC van de Geijn & ML Cambridge (eds), CO2 and Biosphere: Advances in Vegetation Science No.14. Springer Nature, pp. 454-455.
Hauck, B & Gay, A 1993, 'Effects of elevated carbon dioxide concentration on growth and proteins of Lolium temulentum' SEB Meeting on Impact of Climate Change, Canterbury, United Kingdom of Great Britain and Northern Ireland, 1993 - 1993, .
Gay, A & Eagles, CF 1993, 'Modelling cold hardening and dehardening in Lolium' Stressnet Meeting, Manchester, United Kingdom of Great Britain and Northern Ireland, 1993 - 1993, .
Gay, A 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 studies' Controlled Environment Users' Group, Leicester, United Kingdom of Great Britain and Northern Ireland, 1993 - 1993, .
Eagles, CF & Gay, A 1993, 'Will climate affect winter survival?' SEB Meeting on Impact of Climate Change, Canterbury, United Kingdom of Great Britain and Northern Ireland, 1993 - 1993, .
Eves, AJ, Stewart, TP, Gay, AP, Kemp, AI, Easey, M, Angel, R, Thomas, NJ & Pearce, DA 2009, 'Developing unmanned aerial vehicles for local and flexible environmental and agricultural monitoring' Paper presented at New Dimensions in Earth Observation. Remote Sensing and Photogrammetry Society conference, Leicester, UK, Leicester, United Kingdom of Great Britain and Northern Ireland, 2009 - 2009, pp. 471-476.
Bougeniere, G, Cariou, C, Chehdi, K & Gay, A 2008, Non parametric stochastic expectation maximization for data clustering. in J Filipe & MS Obaidat (eds), E-business and Telecommunications. Revised Selected Papers of the 4th International Conference, ICETE 2007, Barcelona, Spain, July 28-31, 2007,. pp. 293-303. DOI: 10.1007/978-3-540-88653-2
Gay, AP, Thomas, H, Roca, M, James, CL, Taylor, J, Rowland, JJ & Ougham, HJ 2008, 'Nondestructive analysis of senescence in mesophyll cells by spectral resolution of protein synthesis-dependent pigment metabolism' New Phytologist, vol 179, no. 3, pp. 663-674. DOI: 10.1111/j.1469-8137.2008.02412.x
Prats, E, Carver, TLW, Gay, A & Mur, L 2007, 'Enemy at the Gates: Interaction-Specific Stomatal Responses to Pathogenic Challenge' Plant Signaling and Behavior, vol 2, no. 4, pp. 275-277. DOI: 10.4161/psb.2.4.4153
Donnison, I, Gay, A, Thomas, H, Edwards, KJ, Edwards, D, Evans, C, Thomas, A & Ougham, H 2007, 'Modification of nitrogen remobilisation, grain fill and leaf senescence in maize (Zea mays L.) by transposon insertional mutagenensis in a protease gene' New Phytologist, vol 173, no. 3, pp. 481-494. DOI: 10.1111/j.1469-8137.2006.01928.x
Bougeniere, G, Cariou, C, Chehdi, K & Gay, A 2007, Unsupervised non parametric data clustering by means of Bayesian inference and information theory. in Proceedings of the International Conference on signal processing and multimedia applications (SIGMAP). Institute for Systems and Technologies of Information, Control and Communication Press, pp. 101-108.
Prats, E, Gay, AP, Thomas, BJ, Mur, LAJ & Carver, TLW 2006, 'Stomatal lock-open, a consequence of epidermal cell death, follows transient suppression of stomatal opening in barley attacked by Blumeria graminis' Journal of Experimental Botany, pp. 2211-2226.
Ougham, HJ, Donnison, IS, Taylor, J, Vozel, B, Chehdi, K, Gay, AP, Wagstaff, C, Stead, AD, Cariou, C & Rogers, HJ 2006, 'Hyperspectral imaging in plant science: some case studies of various stresses on different species and at different scales under laboratory and natural lighting conditions'. DOI: 10.1016/j.cbpa.2006.01.053
Gay, A 2006, 'Is hyperspectral imaging a useful technique for managing crops and monitoring grassland?' 2006 Plant Science Wales, Cardiff, United Kingdom of Great Britain and Northern Ireland, 2007 - 2007, .
Galyuon, IKA, Gay, A, Borrell, AK & Howarth, C 2005, 'Maintaining yield under drought stress by different mechanisms in a range of genetic sources of stay-green sorghum' 2005 Society for Experimental Botany, Annual Main Meeting, Barcelona, Spain, 2005 - 2005, pp. S314.
Rapacz, M, Gasior, D, Zwierzykowski, Z, Lesniewska-Bocianowska, A, Humphreys, MW & Gay, AP 2004, 'Changes in cold tolerance and the mechanisms of acclimation of photosystem II to cold hardening generated by anther culture of Festuca pratensis × Lolium multiflorum cultivars' New Phytologist, vol 162, no. 1, pp. 105-114. DOI: 10.1111/j.1469-8137.2004.01024.x
Carver, TLW, Prats, E, Gay, A, Mur, L, Thomas, BJ & Kunoh, H 2004, 'Powdery mildew, cereal cells and sustainable crop production' Paper presented at 11th International Cereal Rust and Powdery Mildew Conference, Norwich, United Kingdom of Great Britain and Northern Ireland, 2004 - 2004, .
Gay, A, Smith, EL, Kingston-Smith, A, Thorogood, D, Roca, M, Ougham, H, Thomas, H, Evans, C, Davies, T & Moss, L 2004, Photoinhibition and resistance to winter damage in stay-green amenity grasses. in Comparative Biochemistry and Physiology, Part A. vol. 137, S170, Society for Experimental Biology (SEB) Meeting, Edinburgh, United Kingdom of Great Britain and Northern Ireland, 2004.
Berry, PM, Spink, JH, Gay, AP & Craigon, J 2003, 'A comparison of root and stem lodging risks among winter wheat cultivars' Journal of Agricultural Science, vol 141, no. 2, pp. 191-202. DOI: 10.1017/S002185960300354X
Collings, LV, Blair, AM, Gay, AP, Dyer, CJ & MacKay, W 2003, 'The effect of weather factors on the performance of herbicides to control Alopecurus myosuroides in winter wheat' Weed Research, vol 43, no. 2, pp. 146-153. DOI: 10.1046/j.1365-3180.2003.00327.x
Robinson, D, Bingham, IJ, Sylvester-Bradley, R, Foulkes, MJ, Gay, AP, Gregory, PJ & King, JA 2003, 'Modelling cereal root systems for water and nitrogen capture: towards an economic option' Annals of Botany, pp. 383-390.
Ougham, H, Gay, A, Donnison, I, Thomas, H, Evans, C & Rowlands, J 2003, 'Hyperspectral imaging and machine learning as a no-invasive screening tool to determine crop maturity, nutritional status and stress' DEFRA Arable Crop Physiology and Technology Workshop, United Kingdom of Great Britain and Northern Ireland, 2003 - 2003, pp. AR09.
Ougham, H, Gay, A, Donnison, I, Thomas, H, Evans, C & Rowlands, J 2003, 'Hyperspectral imaging and machine learning as a non-invasive screening tool to determine crop maturity, nutritional status and stress' DEFRA Arable Crop Physiology and Technology Workshop, United Kingdom of Great Britain and Northern Ireland, 2003 - 2003, .
Spinks, J, Berry, PM, Fenwick, R & Gay, A 2003, To establish separate power ratings for stem and root lodging in the UK Recommended Lists for wheat: HGCA Project No. 2213 Final Report. Home-Grown Cereals Authority.
King, JA, Gay, AP, Villalobos, J (ed.) & Testi, L (ed.) 2002, 'Estimating a crop root system from limited core samples' pp. 15-18.
Morgan, S, Theobald, V, Leemans, D, Gay, A & Scollan, N 2016, 'Detection of faecal and gut contamination on chicken carcasses using a chlorophyll-based marker' 67th Annual Meeting of the European Federation of Animal Science, Belfast, United Kingdom of Great Britain and Northern Ireland, 2016 - 2016, pp. 539.
Boeckx, T, Webster, R, Winters, A, Webb, J, Gay, A & Kingston-Smith, A 2015, 'Polyphenol oxidase-mediated protection against oxidative stress is not associated with enhanced photosynthetic efficiency' Annals of Botany, vol 116, no. 4, pp. 529-540. DOI: 10.1093/aob/mcv081
Humphreys, MW, O'Donovan, SA, Farrell, MS, Gay, AP & Kingston-Smith, AH 2014, 'The potential of novel Festulolium (2n=4x=28) hybrids as productive, nutrient-use-efficient fodder for ruminants' Food and Energy Security, vol 3, no. 2, pp. 98-110. DOI: 10.1002/fes3.50
Camargo-Rodriguez, A, Papadopoulou, D, Spyropoulou, Z, Vlachonasios, K, Doonan, JH, Gay, AP & Candela, H (ed.) 2014, 'Objective Definition of Rosette Shape Variation Using a Combined Computer Vision and Data Mining Approach' PLoS One, vol 9, no. 5, pp. e96889. DOI: 10.1371/journal.pone.0096889
Gegas, VC, Gay, A, Camargo, A & Doonan, J 2014, Challenges of Crop Phenomics in the Post-genomic Era. in J Hancock (ed.), Phenomics. Taylor & Francis, pp. 142-171. DOI: 10.1201/b16437-8
Lee, MRF, Leemans, D, Theobald, VJ, Fleming, HR & Gay, AP 2013, 'The development of chlorophyll-based markers in poultry diets to aid detection of fluorescent fecal contamination' Poultry Science, vol 92, no. 12, pp. 3251-3258. DOI: 10.3382/ps.2013-03310
Mur, LAJ, Simpson, C, Gay, A, Paveley, N, Sanchez-Martin, J & Prats, E 2013, 'Stomatal lock-up following pathogenic challenge: Source or symptom of costs of resistance in crops?' Plant Pathology, vol 62, no. S1, pp. 72-82. DOI: 10.1111/ppa.12174
Robson, PRH, Farrar, K, Gay, AP, Jensen, EF, Clifton-Brown, JC & Donnison, IS 2013, 'Variation in canopy duration in the perennial biofuel crop Miscanthus reveals complex associations with yield: Canopy duration and yield in Miscanthus' Journal of Experimental Biology, vol 64, no. 8, pp. 2373-2383. DOI: 10.1093/jxb/ert104
Wychowaniec, JK, Griffiths, I, Gay, A & Mughal, A 2013, 'Compaction of cereal grain' Philosophical Magazine, vol 93, no. 31-33, pp. 4151-4158. DOI: 10.1080/14786435.2013.808771
Kingston-Smith, AH, Davies, TE, Edwards, JE, Gay, A & Mur, LAJ 2012, 'Evidence of a role for foliar salicylic acid in regulating the rate of post-ingestive protein breakdown in ruminants and contributing to landscape pollution' Journal of Experimental Botany, vol 63, no. 8, pp. 3243-3255. DOI: 10.1093/jxb/ers048
Sagatarame, S, Leemans, L, Theobald, VJ, Fleming, H, Gay, A & Lee, MRF 2012, 'Incorporation of chlorophyll based markers into lamb finishing rations to aid visualization of faecal contamination in the abattoir- a spectrometric approach' pp. 27.
Doonan, J, Howarth, C, Camargo-Rodriguez, A, Allison, G, Swain, G, Gay, A & Draper, J 2012, 'EPPN: High throughput plant phenotyping facilities at Aberystwyth' EPPN Workshop, Warsaw, Poland, 2012 - 2012, .
Boeckx, T, Kingston-Smith, A, Webster, R, Winters, A, Webb, K & Gay, A 2012, 'Can polyphenol oxidase mitigate photooxidative damage under abiotic stress conditions?' Society for Experimental Biology (SEB) Annual Meeting, Salzburg, Austria, 2012 - 2012, pp. Abstract No: P1.27.
Sagatarame, S, Gay, A & Lee, MRF 2011, 'Improving detection of faecal contamination of carcasses using chlorophyll based markers' Paper presented at Novus Symposium: 20 Years Innovation with Integrity, Tarragona, Spain, 2011 - 2011, .
Gay, AP, Mur, LAJ & Withers, CM 2011, 'Are stomatal responses the key to understanding the cost of fungal disease resistance in plants?' Journal of the Science of Food and Agriculture, vol 91, no. 9, pp. 1538-1540. DOI: 10.1002/jsfa.4423
Robson, PRH, Kelly, R, Jensen, EF, Giddings, GD, Leitch, M, Davey, C, Gay, AP, Jenkins, G, Thomas, H & Donnison, IS 2011, 'A flexible quantitative methodology for the analysis of gene-flow between conventionally bred maize populations using microsatellite markers' Theoretical and Applied Genetics, vol 122, no. 4, pp. 819-829. DOI: 10.1007/s00122-010-1489-0
Howarth, CJ, Gay, AP, Draper, J & Powell, W 2011, Development of high throughput plant phenotyping facilities at Aberystwyth. in Phenomics Workshop. Plant and Animal Genome XIX Conference , San Diego, United States of America, 2011.
Liu, Y, Draper, JH, Gay, AP, Howarth, C & Martin, RR 2011, 'Choosing the number of labels in image segmentation' Paper presented at 16th IEEE International Conference on Emerging Technologies and Factory Automation (ETFA), Toulouse, France, 2011 - 2011, . DOI: 10.1109/ETFA.2011.6059090
Robson, PR, Kelly, R, Jensen, EF, Davey, C, Gay, AP, Thomas, H, Donnison, IS, Leitch, M, Warren, JM, Giddings, GD & Jenkins, G 2011, Factors affecting rates of cross-pollination in maize growing under typical UK conditions RG0124. DEFRA Report 2011, Department for Environment, Food and Rural Affairs.
Prats, E, Gay, AP, Roberts, PC, Thomas, BJ, Sanderson, R, Paveley, N, Lyngkjaer, MF, Carver, TLW & Mur, LAJ 2010, 'Blumeria graminis interactions with barley conditioned by different single R genes demonstrate a temporal and spatial relationship between stomatal dysfunction and cell death' Phytopathology, vol 100, no. 1, pp. 21-32. DOI: 10.1094/PHYTO-100-1-0021
Haigh, GR, Carver, TLW, Gay, AP & Farrar, JF 1991, 'Respiration and photosynthesis in oats exhibiting different levels of partial resistance to Erysiphe graminis D.c. ex Merat f. sp. avenae Marchal' New Phytologist, vol 119, no. 1, pp. 129-136. DOI: 10.1111/j.1469-8137.1991.tb01016.x
Gay, A & Eagles, CF 1991, 'Quantitative analysis of cold hardening and dehardening in Lolium' Annals of Botany, vol 67, no. 4, pp. 339-345.
Gay, A 1989, 'Assessment of the response to selection for leaf water conductance in Lolium perenne' Annals of Botany, pp. 593-598.
Gay, A 1988, 'Recovery of photosynthesis during regrowth of Lolium perenne' Britih Grassland Society (BGS) Research Meeting, Aberystwyth, United Kingdom of Great Britain and Northern Ireland, 1988, .
Thomas, H & Gay, A 1987, Characterization of forages for drought resistance. in BF Tyler (ed.), 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. International Board for Plant Genetic Resources, pp. 29-35.