Dr Annette Ryan

Laboratory Manager

Research Overview

I manage the Soils and Ecosystem Ecology Research Laboratory at Lancaster Environment Centre. Our research focuses mainly upon plant-soil interactions and soil biogeochemistry. Facilities include analysis of C, N and P in tissues and extracts, phospholipid fatty acid (PLFA) and enzyme assays, raw fibre analysis, soil respiration and soil density fractionation. We also have a range of field equipment including infra-red gas analyses for measurement of respiration and photosynthesis and hand held soil moisture meters.

My previous research used a phenotyping platform to explore the efficiency with which cereal crops use water and how whole plant transpiration responded to changing atmospheric vapour pressure deficit. I also investigated whether improving plant responses to oxidative stress can influence water use efficiency.

Gravimetric phenotyping of whole plant transpiration responses to atmospheric vapour pressure deficit identifies genotypic variation in water use efficiency
Ryan, A., Dodd, I.C., Rothwell, S.A., Jones, R.J.G., Tardieu, F., Draye, X., Davies, W.J. 28/05/2016 In: Plant Science.
Journal article

Mapping gas-phase organic reactivity and concomitant secondary organic aerosol formation: chemometric dimension reduction techniques for the deconvolution of complex atmospheric datasets
Wyche, K.P., Monks, P.S., Smallbone, K.L., Hamilton, J.F., Alfarra, M.R., Rickard, A.R., Mcfiggans, G.B., Jenkin, M.E., Bloss, W.J., Ryan, A.C., Hewitt, C.N., Mackenzie, R. 20/01/2015 In: Atmospheric Chemistry and Physics . 15, 2, p. 1651-1702. 52 p.
Journal article

Emissions of biogenic volatile organic compounds and subsequent photochemical production of secondary organic aerosol in mesocosm studies of temperate and tropical plant species
Wyche, K.P., Ryan, A., Hewitt, C.N., Alfarra, M.R., McFiggans, G., Carr, T., Monks, P.S., Smallbone, K.L., Capes, G., Hamilton, J.F., Pugh, T.A.M., Mackenzie, A.R. 5/12/2014 In: Atmospheric Chemistry and Physics . 14, 23, p. 12781-12801. 21 p.
Journal article

Isoprene emission protects photosynthesis but reduces plant productivity during drought in transgenic tobacco (Nicotiana tabacum) plants
Ryan, A., Hewitt, C.N., Purnell, A., Possell, M., Vickers, C., Mullineaux, P., Davies, B., Dodd, I. 01/2014 In: New Phytologist. 201, 1, p. 205-216. 12 p.
Journal article

World War II contrails: a case study of aviation-induced cloudiness
Ryan, A.C., MacKenzie, A.R., Watkins, S., Timmis, R. 09/2012 In: International Journal of Climatology. 32, 11, p. 1745-1753. 9 p.
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Reply to 'Circadian control of global isoprene emissions'
Hewitt, C.N., Ashworth, K., Boynard, A., Guenther, A., Langford, B., MacKenzie, A.R., Misztal, P.K., Nemitz, E., Owen, S.M., Possell, M., Pugh, T.A.M., Ryan, A.C., Wild, O. 07/2012 In: Nature Geoscience. 5, 7, 2 p.

Ground-level ozone influenced by circadian control of isoprene emissions
Hewitt, C.N., Ashworth, K., Boynard, A., Guenther, A., Langford, B., MacKenzie, A.R., Misztal, P.K., Nemitz, E., Owen, S.M., Possell, M., Pugh, T.A.M., Ryan, A.C., Wild, O. 10/2011 In: Nature Geoscience. 4, 10, p. 671-674. 4 p.
Journal article

Isoprene synthesis in plants: lessons from a transgenic tobacco model
Vickers, C.E., Possell, M., Laothawornkitkul, J., Ryan, A., Hewitt, C.N., Mullineaux, P.M. 06/2011 In: Plant, Cell and Environment. 34, 6, p. 1043-1053. 11 p.
Journal article

Effects of fosmidomycin on plant photosynthesis as measured by gas exchange and chlorophyll fluorescence
Possell, M., Ryan, A., Vickers, C., Mullineaux, P.M., Hewitt, C.N. 04/2010 In: Photosynthesis Research. 104, 1, p. 49-59. 11 p.
Journal article

Large estragole fluxes from oil palms in Borneo
Misztal, P.K., Owen, S.M., Guenther, A.B., Rasmussen, R., Geron, C., Harley, P., Phillips, G.J., Ryan, A., Edwards, D.P., Nemitz, E., Siong, J., Heal, M.R., Hewitt, C.N., Cape, J.N. 2010 In: Atmospheric Chemistry and Physics . 10, 9, p. 4343-4358. 16 p.
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Defining hybrid poplar (Populus deltoides x Populus trichocarpa) tolerance to ozone: identifying key parameters
Ryan, A., Cojocariu, C., Possell, M., Davies, B., Hewitt, N. 01/2009 In: Plant, Cell and Environment. 32, 1, p. 31-45. 15 p.
Journal article

Isoprene synthesis protects transgenic tobacco plants from oxidative stress
Vickers, C.E., Possell, M., Cojocariu, C., Velikova, V.B., Laothawornkitkul, J., Ryan, A., Mullineaux, P.M., Hewitt, C.N. 2009 In: Plant, Cell and Environment. 32, 5, p. 520-531. 12 p.
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