Our research is focused on understanding the diversity and metabolic flexibility of cyanobacteria, and these microbes are found in almost all environments on Earth. They are an excellent model system for the study of photosynthesis, nitrogen assimilation, circadian rhythms, and response to environmental stresses and have potential as a renewable energy source. Less than 20% of described species have been cultured, indicating the potential of cyanobacteria remains to be discovered.
Please contact me if you are interested in research projects in any of these areas.
The Photosynthetic electron transport chain under low oxygen conditions
We have identified changes in the photosynthetic electron transport chain under low oxygen conditions that are associated with hydrogen production. We are investigating the impact of these changes on photosynthetic performance.
Cyanobacterial symbioses
Cyanobacteria form symbiotic associations with plants and fungi. We are studying cyanolichens, in particular the mode of cellular communication between the symbiotic partners and how this alters photosynthetic metabolism.
Publications
Sheridan, K. J., Brown, T. J., Eaton-Rye, J. J., & Summerfield, T. C. (2023). Expression of the far-red D1 protein or introduction of conserved far-red D1 residues into Synechocystis sp. PCC 6803 impairs Photosystem II. Physiologia Plantarum, 175, e13997. doi: 10.1111/ppl.13997
Journal - Research Article
van Galen, L. G., Orlovich, D. A., Lord, J. M., Bohorquez, J., Nilsen, A. R., Summerfield, T. C., & Larcombe, M. J. (2023). Zeta diversity differentiates factors driving community assembly of rare and common ectomycorrhizal fungi. Molecular Ecology. Advance online publication. doi: 10.1111/mec.16860
Journal - Research Article
McGovern, J. J., Nilsen, A. R., Summerfield, T. C., & Orlovich, D. A. (2022, May). Takahē, scouts for fungal diversity. Verbal presentation at the Fungal Network of New Zealand 35th New Zealand 'Virtual' Fungal Foray including the 20th Mycology Colloquium, [Online].
Conference Contribution - Verbal presentation and other Conference outputs
van Galen, L., Orlovich, D., Lord, J., Bohorquez, J., Nilsen, A., Summerfield, T., Dutoit, L., & Larcombe, M. (2022, May). Environment and host effects on New Zealand Nothofagus ectomycorrhizal fungal communities. Verbal presentation at the Fungal Network of New Zealand 35th New Zealand 'Virtual' Fungal Foray including the 20th Mycology Colloquium, [Online].
Conference Contribution - Verbal presentation and other Conference outputs
Nilsen, A. R., Chyou, D., Summerfield, T. C., Catcheside, D., Brown, C. M., & Orlovich, D. A. (2022, May). Molecular evolution of truffle like fungi in NZ: Clues from Leratiomyces. Verbal presentation at the Fungal Network of New Zealand 35th New Zealand 'Virtual' Fungal Foray including the 20th Mycology Colloquium, [Online].
Conference Contribution - Verbal presentation and other Conference outputs
Choo, P., Forsman, J. A., Hui, L., Khaing, E. P., Summerfield, T. C., & Eaton-Rye, J. J. (2022). The PsbJ protein is required for photosystem II activity in centers lacking the PsbO and PsbV lumenal subunits. Photosynthesis Research, 151, 103-111. doi: 10.1007/s11120-021-00862-y
Journal - Research Article
Asih, D. R., Summerfield, T. C., & Eaton-Rye, J. J. (2022). Exploration of cyanobacteria as bioremediation candidates to reduce phosphorous contamination. IOP Conference Series: Earth & Environmental Science, 1062, 012027. doi: 10.1088/1755-1315/1062/1/012027
Conference Contribution - Published proceedings: Full paper
Forsman, J. A., Brown, T. J., Sheridan, K. J., Summerfield, T. C., & Eaton-Rye, J. J. (2022). Partitioning of excitation energy between Photosystem II and Photosystem I is affected by mutations targeting the His-252 residue of the D1 subunit of Photosystem II. Proceedings of the International Society of Photosynthesis Research (ISPR) 18th International Congress on Photosynthesis Research. (pp. 247). Retrieved from https://www.ps2022.nz
Conference Contribution - Published proceedings: Abstract
Sheridan, K. J., Eaton-Rye, J. J., & Summerfield, T. C. (2022). Characterisation of Synechocystis sp. PCC 6803 mutants that contain an introduced copy of psbA from a cyanobacterial gene cluster induced under far-red light. Proceedings of the International Society of Photosynthesis Research (ISPR) 18th International Congress on Photosynthesis Research. (pp. 266). Retrieved from https://www.ps2022.nz
Conference Contribution - Published proceedings: Abstract
Allen, R. J., Summerfield, T. C., Harvey, B. P., Agostini, S., Rastrick, S. P. S., Hall-Spencer, J. M., & Hoffmann, L. J. (2021). Species turnover underpins the effect of elevated CO2 on biofilm communities through early succession. Climate Change Ecology, 2, 100017. doi: 10.1016/j.ecochg.2021.100017
Journal - Research Article
Harvey, B. P., Allen, R., Agostini, S., Hoffmann, L. J., Kon, K., Summerfield, T. C., … Hall-Spencer, J. M. (2021). Feedback mechanisms stabilise degraded turf algal systems at a CO2 seep site. Communications Biology, 4(1), 219. doi: 10.1038/s42003-021-01712-2
Journal - Research Article
Nilsen, A. R., Macrae, O. C., Andrew, K., Wang, X. Y., Te Tana, M. C., Soop, K., Brown, C. M., Summerfield, T. C., & Orlovich, D. A. (2021). Studies of New Zealand Cortinarius: Resolution of taxonomic conflicts in section Subcastanelli (Agaricales), new species and key to rozitoid species. New Zealand Journal of Botany, 59(4), 457-475. doi: 10.1080/0028825X.2021.1879877
Journal - Research Article
Lea-Smith, D. J., Summerfield, T. C., Ducat, D. C., Lu, X., McCormick, A. J., & Purton, S. (2021). Exploring the growing role of cyanobacteria in industrial biotechnology and sustainability. Frontiers in Microbiology, 12, 725128. doi: 10.3389/fmicb.2021.725128
Journal - Research Other
Nilsen, A., Chyou, D., Summerfield, T., Catcheside, D., Brown, C., & Orlovich, D. (2021). Molecular evolution of truffle like fungi in NZ: Clues from comparative genomics. Proceedings of the 16th Congress of the Federation of Asian & Oceanic Biochemists & Molecular Biologists (FAOBMB). (pp. 220). Retrieved from https://www.faobmb2021.org
Conference Contribution - Published proceedings: Abstract
Orlovich, D. A., Nilsen, A. R., McGovern, J., Lasham, S., Williams, D., van Galen, L. G., Summerfield, T. C., Larcombe, M. J., Lord, J. M., & Brown, C. M. (2021). Bush genomics: Using genetics and genomics tools to discover and understand New Zealand's truffle-like fungi [Invited]. Proceedings of the Genetics Otago (GO) Annual Symposium. Retrieved from https://blogs.otago.ac.nz/go
Conference Contribution - Published proceedings: Abstract
Orlovich, D. A., van Galen, L. G., Nilsen, A. R., Larcombe, M. J., Lord, J. M., Summerfield, T. C., & Brown, C. M. (2021). eDNA for detecting data-deficient fungi. Proceedings of the 16th Congress of the Federation of Asian & Oceanic Biochemists & Molecular Biologists (FAOBMB). (pp. 89). Retrieved from https://www.faobmb2021.org
Conference Contribution - Published proceedings: Abstract
Allen, R., Hoffmann, L. J., Larcombe, M. J., Louisson, Z., & Summerfield, T. C. (2020). Homogeneous environmental selection dominates microbial community assembly in the oligotrophic South Pacific Gyre. Molecular Ecology, 29, 4680-4691. doi: 10.1111/mec.15651
Journal - Research Article
Allen, R., Hoffmann, L. J., Law, C. S., & Summerfield, T. C. (2020). Subtle bacterioplankton community responses to elevated CO2 and warming in the oligotrophic South Pacific Gyre. Environmental Microbiology Reports, 12(4), 377-386. doi: 10.1111/1758-2229.12844
Journal - Research Article
Allen, R., Summerfield, T. C., Currie, K., Dillingham, P. W., & Hoffmann, L. J. (2020). Distinct processes structure bacterioplankton and protist communities across an oceanic front. Aquatic Microbial Ecology, 85, 19-34. doi: 10.3354/ame01938
Journal - Research Article
Fagerlund, R. D., Forsman, J. A., Biswas, S., Vass, I., Davies, F. K., Summerfield, T. C., & Eaton-Rye, J. J. (2020). Stabilization of Photosystem II by the PsbT protein impacts photodamage, repair and biogenesis. Biochimica et Biophysica Acta: Bioenergetics, 1861, 148234. doi: 10.1016/j.bbabio.2020.148234
Journal - Research Article
Feng, Y., Roleda, M. Y., Armstrong, E., Summerfield, T. C., Law, C. S., Hurd, C. L., & Boyd, P. W. (2020). Effects of multiple drivers of ocean global change on the physiology and functional gene expression of the coccolithophore Emiliania huxleyi. Global Change Biology, 26, 5630-5645. doi: 10.1111/gcb.15259
Journal - Research Article
Forsman, J. A., Fagerlund, R. D., Biswas, S., Summerfield, T. C., & Eaton-Rye, J. J. (2020). The PsbT protein modifies the bicarbonate-binding environment of Photosystem II. New Zealand Journal of Botany, 58(4), 406-421. doi: 10.1080/0028825X.2020.1772320
Journal - Research Article
Ludwig, L. R., Kantvilas, G., Nilsen, A. R., Orlovich, D. A., Ohmura, Y., Summerfield, T. C., … Lord, J. M. (2020). A molecular-genetic reassessment of the circumscription of the lichen genus Icmadophila. Lichenologist, 52(3), 213-220. doi: 10.1017/S0024282920000122
Journal - Research Article
Nilsen, A. R., Teasdale, S. E., Guy, P. L., Summerfield, T. C., & Orlovich, D. A. (2020). Fungal diversity in canopy soil of silver beech, Nothofagus menziesii (Nothofagaceae). PLoS ONE, 15(1), e0227860. doi: 10.1371/journal.pone.0227860
Journal - Research Article
Nilsen, A. R., Wang, X. Y., Soop, K., Cooper, J. A., Ridley, G. S., Wallace, M., Summerfield, T. C., Brown, C. M., & Orlovich, D. A. (2020). Purple haze: Cryptic purple sequestrate Cortinarius in New Zealand. Mycologia, 112(3), 588-605. doi: 10.1080/00275514.2020.1730120
Journal - Research Article
Sheridan, K. J., Duncan, E. J., Eaton-Rye, J. J., & Summerfield, T. C. (2020). The diversity and distribution of D1 proteins in cyanobacteria. Photosynthesis Research, 145(2), 111-128. doi: 10.1007/s11120-020-00762-7
Journal - Research Article
Eaton-Rye, J. J., Guieysse, B., Packer, M. A., Summerfield, T. C., & Wood, S. A. (2020). Biology and biotechnological applications of microalgae and photosynthetic prokaryotes: Part 2. New Zealand Journal of Botany, 58(4), 275-277. doi: 10.1080/0028825X.2020.1856887
Journal - Research Other
Morris, J. N., Kovács, S., Vass, I., Summerfield, T. C., & Eaton-Rye, J. J. (2019). Environmental pH and Glu364 to Gln mutation in the chlorophyll-binding CP47 protein affect redox-active TyrD and charge recombination in Photosystem II. FEBS Letters, 593, 163-174. doi: 10.1002/1873-3468.13307
Journal - Research Article
Nilsen, A. R., Brown, C. M., Summerfield, T. C., & Orlovich, D. A. (2019). Cortinarius atropileatus sp. nov. (Cortinariaceae) from New Zealand. New Zealand Journal of Botany, 57(1), 50-61. doi: 10.1080/0028825X.2018.1548493
Journal - Research Article
Salis, R. K., Bruder, A., Piggott, J. J., Summerfield, T. C., & Matthaei, C. D. (2019). Multiple-stressor effects of dicyandiamide (DCD) and agricultural stressors on trait-based responses of stream benthic algal communities. Science of the Total Environment, 693, 133305. doi: 10.1016/j.scitotenv.2019.07.111
Journal - Research Article
Eaton-Rye, J. J., Guieysse, B., Packer, M. A., Summerfield, T. C., & Wood, S. A. (2019). Biology and biotechnological applications of microalgae and photosynthetic prokaryotes: Part 1. New Zealand Journal of Botany, 57(2), 65-69. doi: 10.1080/0028825X.2019.1625558
Journal - Research Other
Allen, R., Summerfield, T. C., Harvey, B., Agostini, S., & Hoffmann, L. J. (2019). Biofilm succession in an acidified ocean: Mechanistic insights from a volcanic CO2 seep study. Proceedings of the 12th New Zealand Ocean Acidification Workshop. (pp. 12). Retrieved from http://nzoac.nz
Conference Contribution - Published proceedings: Abstract
Orlovich, D. A., Nilsen, A. R., Summerfield, T. C., Brown, C. M., Ohlemüller, R., van Galen, L., Larcombe, M., & Lord, J. (2019). Using genomics tools to understand beech forests and their fungi. Proceedings of the Joint Conference of the Australasian Systematic Botany Society (ASBS) and the New Zealand Plant Conservation Network (NZPCN): Taxonomy for Plant Conservation: Ruia mai i Rangiātea. (pp. 38). Retrieved from https://systematics.ourplants.org
Conference Contribution - Published proceedings: Abstract
Sheridan, K. J., Eaton-Rye, J. J., & Summerfield, T. C. (2019). Characterisation of a phylogenetically distinct group of D1 proteins from cyanobacteria. In S. Allakhverdiev & I. Naydov (Eds.), Proceedings of the 10th International Photosynthesis and Hydrogen Energy Research for Sustainability Conference. (pp. 68). Retrieved from https://icprs.ru
Conference Contribution - Published proceedings: Abstract
Summerfield, T. C., Morris, J. N., Pearson, T., Sheridan, K., & Eaton-Rye, J. J. (2019). Characterisation of pH sensitive Photosystem II mutants in Synechocystis sp. PCC 6803. In S. Allakhverdiev & I. Naydov (Eds.), Proceedings of the 10th International Photosynthesis and Hydrogen Energy Research for Sustainability Conference. (pp. 141). Retrieved from https://icprs.ru
Conference Contribution - Published proceedings: Abstract
Allen, R., Rudminat, F., Law, C., Hoffmann, L., & Summerfield, T. (2018). Bacterioplankton resistance to acidification and warming in the oligotrophic ocean. Proceedings of the 11th New Zealand Ocean Acidification Workshop. (pp. 7). Retrieved from http://nzoac.nz
Conference Contribution - Published proceedings: Abstract
Brown, C., Chyou, T.-y., Lim, C. S., Padilla, E., Nilsen, A., Liu, S., … Summerfield, T., … Orlovich, D. (2018). The functions of non-coding RNAs and elements in fungal genomes: New roles in the regulation of gene expression. Proceedings of the New Zealand Microbiological Society (NZMS) New Zealand Society for Biochemistry and Molecular Biology (NZSBMB) Joint Annual Conference: Microbes & Molecules. (pp. 53). Retrieved from https://www.nzmsconference.org.nz
Conference Contribution - Published proceedings: Abstract
Morris, J. N., Crawford, T. S., Pearson, T., Lim, E. G., Eaton-Rye, J. J., & Summerfield, T. C. (2018). Investigating genetic instability in cyanobacteria. Proceedings of the New Zealand Microbiological Society (NZMS) New Zealand Society for Biochemistry and Molecular Biology (NZSBMB) Joint Annual Conference: Microbes & Molecules. (pp. 56-57). Retrieved from https://www.nzmsconference.org.nz
Conference Contribution - Published proceedings: Abstract
Nilsen, A., Summerfield, T., Brown, C., & Orlovich, D. (2018). Evolution of sequestrate fungi in New Zealand, with emphasis on the genus Cortinarius. Proceedings of the New Zealand Microbiological Society (NZMS) New Zealand Society for Biochemistry and Molecular Biology (NZSBMB) Joint Annual Conference: Microbes & Molecules. (pp. 56). Retrieved from https://www.nzmsconference.org.nz
Conference Contribution - Published proceedings: Abstract
Orlovich, D. A., Nilsen, A. R., Kahlert, B. C., Teasdale, S. E., Guy, P. L., & Summerfield, T. C. (2018). Microbial diversity in aerial "canopy soil" microhabitats. Proceedings of the New Zealand Microbiological Society (NZMS) New Zealand Society for Biochemistry and Molecular Biology (NZSBMB) Joint Annual Conference: Microbes & Molecules. (pp. 54). Retrieved from https://www.nzmsconference.org.nz
Conference Contribution - Published proceedings: Abstract
Orlovich, D. A., Nilsen, A. R., Teasdale, S. E., Guy, P. L., & Summerfield, T. C. (2018). Detecting and identifying ectomycorrhizal fungi in New Zealand silver beech (Lophozonia menziesii, Nothofagaceae) forest: A case study. Biodiversity Information Science & Standards, 2, e25982. doi: 10.3897/biss.2.25982
Conference Contribution - Published proceedings: Abstract
Griffith, J. C., Lee, W. G., Orlovich, D. A., & Summerfield, T. C. (2017). Contrasting bacterial communities in two indigenous Chionochloa (Poaceae) grassland soils in New Zealand. PLoS ONE, 12(6), e0179652. doi: 10.1371/journal.pone.0179652
Journal - Research Article
Ludwig, L., Summerfield, T. C., Lord, J. M., & Singh, G. (2017). Characterization of the mating-type locus (MAT) reveals a heterothallic mating system in Knightiella splachnirima. Lichenologist, 49(4), 373-385. doi: 10.1017/S0024282917000214
Journal - Research Article
Morris, J. N., Eaton-Rye, J. J., & Summerfield, T. C. (2017). Phenotypic variation in wild-type substrains of the model cyanobacterium Synechocystis sp. PCC 6803. New Zealand Journal of Botany, 55(1), 25-35. doi: 10.1080/0028825X.2016.1231124
Journal - Research Article
Salis, R. K., Bruder, A., Piggott, J. J., Summerfield, T. C., & Matthaei, C. D. (2017). High-throughput amplicon sequencing and stream benthic bacteria: Identifying the best taxonomic level for multiple-stressor research. Scientific Reports, 7, 44657. doi: 10.1038/srep44657
Journal - Research Article
Packer, M. A., Eaton-Rye, J. J., Summerfield, T. C., Guieysse, B., & Wood, S. A. (2017). Introduction: Proceedings of the 2015 New Zealand symposium on algae and photosynthetic prokaryotes. New Zealand Journal of Botany, 55, 1-4. doi: 10.1080/0028825X.2016.1261908
Journal - Professional & Other Non-Research Articles
Allen, R., Hoffmann, L., & Summerfield, T. (2017). The ecological and evolutionary importance of genetic diversity in phytoplankton responses to ocean acidification. Proceedings of the 10th New Zealand Ocean Acidification Workshop. (pp. 11). Retrieved from http://www.otago.ac.nz/oceanacidification/news/index.html
Conference Contribution - Published proceedings: Abstract
Rudminat, F., Law, C., Hoffmann, L., & Summerfield, T. (2017). Bacterioplankton community response to elevated CO2 and/or temperature in the South Pacific. Proceedings of the 10th New Zealand Ocean Acidification Workshop. (pp. 26). Retrieved from http://www.otago.ac.nz/oceanacidification/news/index.html
Conference Contribution - Published proceedings: Abstract
Crawford, T. S., Eaton-Rye, J. J., & Summerfield, T. C. (2016). Mutation of Gly195 of the ChlH subunit of Mg-chelatase reduces chlorophyll and further disrupts PS II assembly in a Ycf48-deficient strain of Synechocystis sp. PCC 6803. Frontiers in Plant Science, 7, 1060. doi: 10.3389/fpls.2016.01060
Journal - Research Article
Crawford, T. S., Hanning, K. R., Chua, J. P. S., Eaton-Rye, J. J., & Summerfield, T. C. (2016). Comparison of D1´- and D1-containing PS II reaction centre complexes under different environmental conditions in Synechocystis sp. PCC 6803. Plant, Cell & Environment, 39, 1715-1726. doi: 10.1111/pce.12738
Journal - Research Article
Morris, J. N., Eaton-Rye, J. J., & Summerfield, T. C. (2016). Environmental pH and the requirement for the extrinsic proteins of Photosystem II in the function of cyanobacterial photosynthesis. Frontiers in Plant Science, 7, 1135. doi: 10.3389/fpls.2016.01135
Journal - Research Article
Secker, N. H., Chua, J. P. S., Laurie, R. E., McNoe, L., Guy, P. L., Orlovich, D. A., & Summerfield, T. C. (2016). Characterization of the cyanobacteria and associated bacterial community from an ephemeral wetland in New Zealand. Journal of Phycology, 52(5), 761-773. doi: 10.1111/jpy.12434
Journal - Research Article
Orlovich, D. A., Gillard, G., Wang, X., Nilsen, A. R., Brown, C. M., & Summerfield, T. C. (2016). Comparative genomics of a truffle-like fungus Cortinarius beeverorum and its close mushroom relative C. dulciolens. Proceedings of the Scientific Meeting of the Australasian Mycological Society (AMS) with the Fungal Network of New Zealand (FUNNZ). (pp. 14). Retrieved from https://www.australasianmycologicalsociety.com
Conference Contribution - Published proceedings: Abstract
Crawford, T., Eaton-Rye, J., & Summerfield, T. (2015). Cyanobacterial biofuels: The next generation. Proceedings of the Otago Energy Research Centre (OERC) Symposium. (pp. 17). Retrieved from http://www.otago.ac.nz/oerc/
Conference Contribution - Published proceedings: Abstract
Orlovich, D. A., Summerfield, T. C., & Kahlert, B. C. (2015). Microbial diversity in kahikatea (Dacrycarpus dacrydioides) and silver beech (Lophozonia menziesii) canopy and terrrestrial soils. Proceedings of the New Zealand Microbiological Society (NZMS) 60th Conference. (pp. 46). Retrieved from http://www.nzmsconference.org.nz/
Conference Contribution - Published proceedings: Abstract
Summerfield, T. (2015, November). Toxin-producing cyanobacteria. Verbal presentation at the Toxicology Symposium: Toxicology for the Modern Researcher, Dunedin, New Zealand.
Conference Contribution - Verbal presentation and other Conference outputs
Chua, J. P. S., Orlovich, D. A., & Summerfield, T. C. (2014). Cyanobacteria in New Zealand indigenous grasslands. New Zealand Journal of Botany, 52(1), 100-115. doi: 10.1080/0028825X.2013.862554
Journal - Research Article
Luo, H., Jackson, S. A., Fagerlund, R. D., Summerfield, T. C., & Eaton-Rye, J. J. (2014). The importance of the hydrophilic region of PsbL for the plastoquinone electron acceptor complex of Photosystem II. Biochimica et Biophysica Acta: Bioenergetics, 1837(9), 1435-1446. doi: 10.1016/j.bbabio.2014.02.015
Journal - Research Article
Morris, J. N., Crawford, T. S., Jeffs, A., Stockwell, P. A., Eaton-Rye, J. J., & Summerfield, T. C. (2014). Whole genome re-sequencing of two ‘wild-type’ strains of the model cyanobacterium Synechocystis sp. PCC 6803. New Zealand Journal of Botany, 52(1), 36-47. doi: 10.1080/0028825X.2013.846267
Journal - Research Article
Wall, J. M., Wood, S. A., Orlovich, D. A., Rhodes, L. L., & Summerfield, T. C. (2014). Characterisation of freshwater and marine cyanobacteria in the Hokianga region, Northland, New Zealand. New Zealand Journal of Marine & Freshwater Research, 48(2), 177-193. doi: 10.1080/00288330.2013.854814
Journal - Research Article
Eaton-Rye, J. J., Packer, M. A., Summerfield, T. C., & Wood, S. A. (2014). Algal and cyanobacterial bioenergy and diversity. New Zealand Journal of Botany, 52(1), 1-5. doi: 10.1080/0028825X.2013.877947
Journal - Professional & Other Non-Research Articles
Chua, J. P. S., Secker, N. H., Lee, W. G., Orlovich, D. A., & Summerfield, T. C. (2014). Characterisation of the cyanobacterial community from New Zealand ephemeral wetland and native grasslands. Proceedings of the 9th European Workshop on the Molecular Biology of Cyanobacteria. (pp. 133). Retrieved from https://www.nioz.nl/files/afdelingen/YMM/9EWMBC/9EWMBC-Program%20Book.pdf
Conference Contribution - Published proceedings: Abstract
Chua, J., Orlovich, D., Lee, W., & Summerfield, T. (2014, August). Exploring the diversity and abundance of bacterial community in New Zealand grassland soils using 16S rRNA and nifH amplicon sequencing on the Illumina MiSeq. Verbal presentation at the 15th International Symposium on Microbial Ecology (ISME15), Seoul, South Korea.
Conference Contribution - Verbal presentation and other Conference outputs
Summerfield, T. C., Crawford, T. S., Young, R. D., Chua, J. P. S., Macdonald, R. L., Sherman, L. A., & Eaton-Rye, J. J. (2013). Environmental pH affects photoautotrophic growth of Synechocystis sp. PCC 6803 strains carrying mutations in the lumenal proteins of PSII. Plant & Cell Physiology, 54(6), 859-874. doi: 10.1093/pcp/pct036
Journal - Research Article
Summerfield, T. C. (2013). [Review of the book Plastid biology, energy conversion and carbon assimilation (Advances in photosynthesis and respiration, Vol. 34)]. New Zealand Journal of Botany, 51(2), 145-146. doi: 10.1080/0028825X.2012.757755
Journal - Research Other
Summerfield, T. C., Young, R., Sherman, L. A., & Eaton-Rye, J. J. (2013). Characterization of a pH-sensitive Photosystem II mutant in the cyanobacterium Synechocystis sp. PCC 6803. In T. Kuang, C. Lu & L. Zhang (Eds.), Photosynthesis Research for Food, Fuel and the Future: 15th International Conference on Photosynthesis. (pp. 348-352). Berlin, Germany: Springer. doi: 10.1007/978-3-642-32034-7_73
Conference Contribution - Published proceedings: Full paper
Chua, J. P. S., Wallace, E. J. S., Yardley, J. A., Duncan, E. J., Dearden, P. K., & Summerfield, T. C. (2012). Gene expression indicates a zone of heterocyst differentiation within the thallus of the cyanolichen Pseudocyphellaria crocata. New Phytologist, 196(3), 862-872. doi: 10.1111/j.1469-8137.2012.04272.x
Journal - Research Article
Chua, J. P. S., Wallace, E. J. S., Yardley, J. A., & Summerfield, T. C. (2012). Gene expression indicates a zone of heterocyst differentiation within the thallus of the cyanolichen Pseudocyphellaria crocata. Proceedings of the 14th International Symposium on Phototrophic Prokaryotes (ISPP). (pp. 103). Retrieved from http://www.ibmc.up.pt/ispp2012/
Conference Contribution - Published proceedings: Abstract
Ludwig, L. R., Lord, J. M., Burritt, D. J., & Summerfield, T. C. (2012). The reproductive ecology of Icmadophila splachnirima: A rate Australasian lichen exhibiting sexual and asexual reproduction. Proceedings of the 7th International Association for Lichenology Symposium: Lichens: From Genome to Ecosystems in a Changing World. (pp. 45). Bangkok, Thailand: Ramkhamhaeng University Press. [Abstract]
Conference Contribution - Published proceedings: Abstract
Summerfield, T. C., Nagarajan, S., & Sherman, L. A. (2011). Gene expression under low-oxygen conditions in the cyanobacterium Synechocystis sp. PCC 6803 demonstrates Hik31 -dependent and -independent responses. Microbiology, 157(2), 301-312. doi: 10.1099/mic.0.041053-0
Journal - Research Article
Bayer, T., Schallenberg, M., Burns, C., & Summerfield, T. (2010). Drivers of phytoplankton production and biomass in ultra-oligotrophic Lakes Wanaka & Wakatipu. Proceedings of the New Zealand Freshwater Sciences Society (NZFSS) Annual Conference: Freshwater Solutions Going Beyond the Problem. Retrieved from http://freshwater.science.org.nz/index.php/events/nzfss-conference-proceedings/
Conference Contribution - Published proceedings: Abstract
Crawford, T., Eaton-Rye, J., & Summerfield, T. (2010). Cyanobacterial hydrogen production under low oxygen conditions. Proceedings of the Otago Energy Research Centre (OERC) Symposium: Energy Future. Retrieved from http://www.otago.ac.nz/oerc/
Conference Contribution - Published proceedings: Abstract
Shcolnick, S., Summerfield, T. C., Reytman, L., Sherman, L. A., & Keren, N. (2009). The mechanism of iron homeostasis in the unicellular cyanobacterium Synechocystis sp. PCC 6803 and its relationship to oxidative stress. Plant Physiology, 150(4), 2045-2056. doi: 10.1104/pp.109.141853
Journal - Research Article
Toepel, J., McDermott, J. E., Summerfield, T. C., & Sherman, L. A. (2009). Transcriptional analysis of the unicellular, diazotrophic cyanobacterium Cyanothece sp. ATCC 51142 grown under short day/night cycles. Journal of Phycology, 45(3), 610-620. doi: 10.1111/j.1529-8817.2009.00674.x
Journal - Research Article
Summerfield, T. (2009, November). Cyanobacteria: Making hydrogen while the sun shines. Invited presentation at the Genetics Otago Postgraduate Symposium, Dunedin, New Zealand.
Conference Contribution - Verbal presentation and other Conference outputs
Summerfield, T. C., & Sherman, L. A. (2008). Global transcriptional response of the alkali-tolerant cyanobacterium Synechocystis sp. strain PCC 6803 to a pH 10 environment. Applied & Environmental Microbiology, 74(17), 5276-5284. doi: 10.1128/AEM.00883-08
Journal - Research Article
Summerfield, T. C., Toepel, J., & Sherman, L. A. (2008). Low-oxygen induction of normally cryptic psbA genes in cyanobacteria. Biochemistry, 47, 12939-12941.
Journal - Research Article
Toepel, J., Welsh, E., Summerfield, T. C., Pakrasi, H. B., & Sherman, L. A. (2008). Differential transcriptional analysis of the cyanobacterium Cyanothece sp. strain ATCC 51142 during light-dark and continuous-light growth. Journal of Bacteriology, 190(11), 3904-3913. doi: 10.1128/JB.00206-08
Journal - Research Article
Summerfield, T., & Sherman, L. (2008). Using a model cyanobacterium to investigate the transcriptional response to changing environments. Proceedings of the 8th Annual Australasian Microarray and Associated Technologies (AMATA) Conference. Retrieved from http://www.amata.org.au/index.php/resources/2008-conference-abstracts
Conference Contribution - Published proceedings: Abstract
Summerfield, T. C., & Sherman, L. A. (2007). Role of sigma factors in controlling global gene expression in light/dark transitions in the cyanobacterium Synechocystis sp. strain PCC 6803. Journal of Bacteriology, 189(21), 7829-7840. doi: 10.1128/JB.01036-07
Journal - Research Article
Summerfield, T. C., Eaton-Rye, J. J., & Sherman, L. A. (2007). Global gene expression of a ΔPsbO:ΔPsbU mutant and a spontaneous revertant in the cyanobacterium Synechocystis sp. strain PCC 6803. Photosynthesis Research, 94, 265-274.
Journal - Research Article
Singh, A. K., Summerfield, T. C., Li, H., & Sherman, L. A. (2006). The heat shock response in the cyanobacterium Synechocystis sp. strain PCC 6803 and regulation of gene expression by HrcA and SigB. Archives of Microbiology, 186(4), 273-286. doi: 10.1007/s00203-006-0138-0
Journal - Research Article
Summerfield, T. C., & Eaton-Rye, J. J. (2006). Pseudocyphellaria crocata, P. neglecta and P. perpetua from the Northern and Southern Hemispheres are a phylogenetic species and share cyanobionts. New Phytologist, 170, 597-607.
Journal - Research Article
Summerfield, T. C., Shand, J. A., Bentley, F. K., & Eaton-Rye, J. J. (2005). PsbQ (SII1638) in Synechocystis sp. PCC 6803 is required for photosystem II activity in specific mutants and in nutrient-limiting conditions. Biochemistry, 44, 805-815.
Journal - Research Article
Summerfield, T. C., Winter, R. T., & Eaton-Rye, J. J. (2005). Investigation of a requirement for the PsbP-like protein in Synechocystis sp. PCC 6803. Photosynthesis Research, 84, 263-268.
Journal - Research Article
Summerfield, T. C., & Eaton-Rye, J. J. (2005). Removal of the PsbQ-like protein (SII1638) in nutrient-limiting conditions and in strains lacking PsbO, PsbU, or PsbV. In A. van der Est & D. Bruce (Eds.), Proceedings of the 13th International Congress of Photosynthesis.1, (pp. 336-338). Lawrence, KS, USA: Alliance Communications Group. [Full Paper]
Conference Contribution - Published proceedings: Full paper
Summerfield, T., Galloway, D. J., & Eaton-Rye, J. J. (2002). Species of cyanolichens from Pseudocyphellaria with indistinguishable ITS sequences have different photobionts. New Phytologist, 155, 121-129.
Journal - Research Article
Mouchel, N., Tebbutt, S. J., Broackes-Carter, F. C., Sahota, V., Summerfield, T., Gregory, D. J., & Harris, A. (2001). The sheep genome contributes to localization of control elements in a human gene with complex regulatory mechanisms. Genomics, 76, 9-13.
Journal - Research Article
Summerfield, T. C., Galloway, D. J., & Eaton-Rye, J. J. (2001). The use of psbB for the identification of cyanobacterial lichen symbionts. PS2001 Proceedings of the 12th International Congress on Photosynthesis. (S3-041), (pp. 1-4). Victoria: CSIRO Publishing. [Abstract]
Conference Contribution - Published proceedings: Abstract
