Steven M. Smith

Steven M. Smith

Steven Smith at the Stone Forest in China
Born Luton, Bedfordshire, England, UK
Nationality Australian and British
Fields Plant Genetics and Biochemistry
Institutions

Rothamsted Experimental Station
Commonwealth Scientific and Industrial Research Organisation
John Innes Institute
University of Edinburgh
University of Western Australia
Chinese Academy of Sciences Institute of Genetics and Developmental Biology

University of Tasmania
Alma mater University of Leicester (BSc)
Indiana University (MA)
University of Warwick (PhD)
Thesis Synthesis of the small subunit of ribulose-1,5-bisphosphate carboxylase
Doctoral advisor R. John Ellis
Known for Karrikins
Notable awards Fellowship of the Institute of Biology (1998)
Australian Research Council, Federation Fellowship (2004)
Chinese Academy of Sciences, Visiting Professorship (2013)
Chinese Academy of Sciences, President’s International Fellowship, (2014)
People’s Republic of China 'High-End Foreign Expert' Professorship, (2015-17)
Spouse Dr Brenda Winning
Children One daughter
Website
www.stevensmithresearch.com

Steven M. Smith is Professor of Plant Genetics and Biochemistry at the University of Tasmania in Australia, and Professor in the Chinese Academy of Sciences Institute of Genetics and Developmental Biology, Beijing, China.

Education and Early Life

Smith was born and raised in Luton, Bedfordshire, England. He attended Luton Grammar School and Luton Sixth Form College before becoming an Assistant Scientific Officer at Rothamsted Experimental Station in Harpenden, Hertfordshire. Working at Rothamsted inspired him to embark on a career in plant sciences and he obtained university entrance qualifications through ‘day-release’ and evening classes at Luton College of Technology.

Career

He was awarded first class honours in Biological Sciences from the University of Leicester, then went to Indiana University USA to study for a master's degree under the supervision of Carlos Miller, the discoverer of kinetin. Smith returned to the UK to study for a PhD under the supervision of Professor R. John Ellis, at the University of Warwick during which time he conducted some of his research at the Plant Breeding Institute, in Cambridge. He was then awarded a Fellowship to carry out research at the Commonwealth Scientific and Industrial Research Organisation (CSIRO) Division of Plant Industry in Canberra, Australia. After a short period at the John Innes Institute in Norwich, he was appointed to a lectureship in the Botany Department at the University of Edinburgh. He spent 20 years in Edinburgh rising to become Head of the Institute of Molecular Plant Sciences. He served the Scottish Higher Education Funding Council as a Teaching Quality Assessor and was External Examiner at Ngee Ann Polytechnic in Singapore. Following the award of an Australian Research Council Federation Fellowship in 2004, Smith moved to the University of Western Australia and became Winthrop Professor of Plant Genomics. He was founding member of the Australian Research Council Centre of Excellence in Plant Energy Biology in 2005, and was a Chief Investigator until 2014. He also established and was Director of the Centre of Excellence for Plant Metabolomics. In 2015 he was appointed Professor of Plant Genetics and Biochemistry in the School of Biological Sciences at the University of Tasmania. In 2013 and 2014 he was awarded Fellowships by the Chinese Academy of Sciences and appointed Visiting Professor in the Institute of Genetics and Developmental Biology in Beijing. He now holds a People’s Republic of China 'High-End Foreign Expert' Professorship, awarded by the State Administration of Foreign Experts Affairs.

Research

Smith’s research is directed towards understanding plant growth and development at the molecular level, and seeking ways to improve plant productivity and value.

During his PhD studies Smith collaborated with John Bedbrook at the Plant Breeding Institute to clone the first cDNA encoding a plant enzyme.[1] This enzyme is ribulose-1,5-bisphosphate carboxylase/oxygenase, abbreviated to RuBisCO, which is responsible for carbon dioxide fixation by plants. In Edinburgh in the pre-genomics era, he collaborated with Chris Leaver and cloned several key enzymes of plant metabolism, including malate synthase, isocitrate lyase and PEP carboxykinase. He conceived an idea with Anthony Trewavas of creating transgenic plants expressing the calcium-sensitive luminous jellyfish protein, aequorin, to report calcium signalling in plants. Together they obtained funding, created the plants and showed that they could report rapid calcium signalling in response to cold, fungi, touch and wind.[2][3] This work predated similar research using green fluorescent protein from the same jellyfish. In 1996 Smith and his PhD student Takeshi Takaha reported the discovery of cyclic glucans containing up to 200 glucose residues, which they named cycloamylose.[4] Cycloamylose and related cycloglucans are now used extensively in food and biotechnology industries. Further research on starch metabolism with Alison Smith and Sam Zeeman at the John Innes Centre led to the discovery of a novel pathway of starch breakdown in leaves.[5] Smith was also instrumental in defining pathways of energy metabolism involving peroxisomes, particularly fatty acid beta-oxidation and the glyoxylate cycle.[6]

Karrikins: a new family of plant growth regulators

Smith’s current and most important contribution to plant biology lies in the establishment of karrikins as a major family of naturally-occurring plant growth regulators, determination of karrikin mode of action and evolution of the karrikin response.[7][8][9][10][11][12] Karrikins are small organic compounds produced by bushfires. They are washed into the soil by rain and stimulate germination of dormant seeds of fire-following plants that reside in the soil seed-bank.[13] This response to karrikins is a specific evolutionary adaption of numerous fire-following plant species, providing them with the opportunity to grow and reproduce successfully in the post-fire environment.[14]

Smith discovered that Arabidopsis thaliana can respond to karrikins under specific conditions and this provided the breakthrough required to discover their mode of action.[15] His group was able to isolate karrikin-insensitive mutants in Arabidopsis, and the subsequent identification of the mutated genes revealed that karrikin perception and response required an alpha/beta hydrolase known as KARRIKIN INSENSITIVE 2 (KAI2) and an F-box protein known as MORE AXILARY GROWTH2 (MAX2).[16][17] These discoveries revealed that karrikin signalling occurs by a similar mechanism to the signalling of chemically-related strigolactone hormones.[18] Crucially, he established that karrikins and strigolactones are perceived independently, and elicit different responses in plants.[17][19]

His research has further revealed that the usual function of KAI2 is to perceive an endogenous signalling compound that is neither karrikin nor strigolactone, but is probably very similar.[20][21] He proposes that duplication of an ancestral KAI2 gene in early land plants led to the evolution of two genes in seed plants one of which perceives strigoactones and the other perceives the endogenous karrikin-like compound.[22][23]

Awards and recognition

Science and Engineering Research Council UK, NATO Postdoctoral Fellowship, 1980
Fellowship of the Institute of Biology, 1998
Australian Research Council, Federation Fellowship 2004
Chinese Academy of Sciences, Senior International Scientists Visiting Professorship, 2013
Chinese Academy of Sciences, President’s International Fellowship, 2015
People’s Republic of China 'High-End Foreign Expert' Professorship, 2016–18

Personal

Smith is married to Dr Brenda Winning and they have one daughter, Alexandra, born in 1998.

References

  1. ↑ Bedbrook, John R.; Smith, Steven M.; Ellis, R. John (1980-10-23). "Molecular cloning and sequencing of cDNA encoding the precursor to the small subunit of chloroplast ribulose-1,5-bisphosphate carboxylase". Nature 287 (5784): 692–697. doi:10.1038/287692a0.
  2. ↑ Knight, Marc R.; Campbell, Anthony K.; Smith, Steven M.; Trewavas, Anthony J. (1991-08-08). "Transgenic plant aequorin reports the effects of touch and cold-shock and elicitors on cytoplasmic calcium". Nature 352 (6335): 524–526. doi:10.1038/352524a0. PMID 1865907.
  3. ↑ Knight, M. R.; Smith, S. M.; Trewavas, A. J. (1992-06-01). "Wind-induced plant motion immediately increases cytosolic calcium". Proceedings of the National Academy of Sciences 89 (11): 4967–4971. doi:10.1073/pnas.89.11.4967. ISSN 0027-8424. PMC 49209. PMID 11536497.
  4. ↑ Takaha, Takeshi; Yanase, Michiyo; Takata, Hiroki; Okada, Shigetaka; Smith, Steven M. (1996-02-09). "Potato D-enzyme Catalyzes the Cyclization of Amylose to Produce Cycloamylose, a Novel Cyclic Glucan". Journal of Biological Chemistry 271 (6): 2902–2908. doi:10.1074/jbc.271.6.2902. ISSN 0021-9258.
  5. ↑ Smith, Alison M.; Zeeman, Samuel C.; Smith, Steven M. (2005-01-01). "Starch Degradation". Annual Review of Plant Biology 56 (1): 73–98. doi:10.1146/annurev.arplant.56.032604.144257. PMID 15862090.
  6. ↑ Pracharoenwattana, Itsara; Cornah, Johanna E.; Smith, Steven M. (2005-07-01). "Arabidopsis Peroxisomal Citrate Synthase Is Required for Fatty Acid Respiration and Seed Germination". The Plant Cell 17 (7): 2037–2048. doi:10.1105/tpc.105.031856. ISSN 1532-298X. PMC 1167550. PMID 15923350.
  7. ↑ Flematti, Gavin R.; Dixon, Kingsley W; Smith, Steven M. (2015-12-21). "What are karrikins and how were they ‘discovered’ by plants?". BMC Biology 13 (1). doi:10.1186/s12915-015-0219-0. PMC 4687367. PMID 26689715.
  8. ↑ Khan, Amina (2010-03-30). "Smoke linked to stronger, thicker plant growth". Los Angeles Times. ISSN 0458-3035. Retrieved 2015-09-03.
  9. ↑ Vivian, Geoff. "Finding the signalling system for plant ‘smoke’ response". Retrieved 2015-09-03.
  10. ↑ "Groundbreaking plant scientist joined the University of Tasmania". Retrieved 2015-09-03.
  11. ↑ "Bushfire science helping seeds germinate quicker and stronger". ABC Rural. Retrieved 2015-09-03.
  12. ↑ "Chemicals in smoke can help forests regenerate after fire | Pacific Beat". www.radioaustralia.net.au. Retrieved 2015-09-03.
  13. ↑ Nelson, David C.; Riseborough, Julie-Anne; Flematti, Gavin R.; Stevens, Jason; Ghisalberti, Emilio L.; Dixon, Kingsley W.; Smith, Steven M. (2009-02-01). "Karrikins Discovered in Smoke Trigger Arabidopsis Seed Germination by a Mechanism Requiring Gibberellic Acid Synthesis and Light". Plant Physiology 149 (2): 863–873. doi:10.1104/pp.108.131516. ISSN 1532-2548. PMC 2633839. PMID 19074625.
  14. ↑ Nelson, David C.; Flematti, Gavin R.; Riseborough, Julie-Anne; Ghisalberti, Emilio L.; Dixon, Kingsley W.; Smith, Steven M. (2010-04-13). "Karrikins enhance light responses during germination and seedling development in Arabidopsis thaliana". Proceedings of the National Academy of Sciences 107 (15): 7095–7100. doi:10.1073/pnas.0911635107. ISSN 0027-8424. PMC 2872431. PMID 20351290.
  15. ↑ Nelson, David C.; Scaffidi, Adrian; Dun, Elizabeth A.; Waters, Mark T.; Flematti, Gavin R.; Dixon, Kingsley W.; Beveridge, Christine A.; Ghisalberti, Emilio L.; Smith, Steven M. (2011-05-24). "F-box protein MAX2 has dual roles in karrikin and strigolactone signaling in Arabidopsis thaliana". Proceedings of the National Academy of Sciences 108 (21): 8897–8902. doi:10.1073/pnas.1100987108. ISSN 0027-8424. PMC 3102411. PMID 21555559.
  16. ↑ Nelson, David C.; Flematti, Gavin R.; Ghisalberti, Emilio L.; Dixon, Kingsley W.; Smith, Steven M. (2012-01-01). "Regulation of Seed Germination and Seedling Growth by Chemical Signals from Burning Vegetation". Annual Review of Plant Biology 63 (1): 107–130. doi:10.1146/annurev-arplant-042811-105545. PMID 22404467.
  17. 1 2 Waters, Mark T.; Nelson, David C.; Scaffidi, Adrian; Flematti, Gavin R.; Sun, Yueming K.; Dixon, Kingsley W.; Smith, Steven M. (2012-04-01). "Specialisation within the DWARF14 protein family confers distinct responses to karrikins and strigolactones in Arabidopsis". Development 139 (7): 1285–1295. doi:10.1242/dev.074567. ISSN 0950-1991. PMID 22357928.
  18. ↑ Smith, Steven M. (2013-01-01). "Plant biology: Witchcraft and destruction". Nature 504 (7480): 384–385. doi:10.1038/nature12843.
  19. ↑ Smith, Steven M; Li, Jiayang (2014-10-01). "Signalling and responses to strigolactones and karrikins". Current Opinion in Plant Biology. SI: Cell signalling and gene regulation 21: 23–29. doi:10.1016/j.pbi.2014.06.003.
  20. ↑ Scaffidi, Adrian; Waters, Mark T.; Ghisalberti, Emilio L.; Dixon, Kingsley W.; Flematti, Gavin R.; Smith, Steven M. (2013-10-01). "Carlactone-independent seedling morphogenesis in Arabidopsis". The Plant Journal 76 (1): 1–9. doi:10.1111/tpj.12265. ISSN 1365-313X.
  21. ↑ Scaffidi, Adrian; Waters, Mark T.; Sun, Yueming K.; Skelton, Brian W.; Dixon, Kingsley W.; Ghisalberti, Emilio L.; Flematti, Gavin R.; Smith, Steven M. (2014-07-01). "Strigolactone Hormones and Their Stereoisomers Signal through Two Related Receptor Proteins to Induce Different Physiological Responses in Arabidopsis". Plant Physiology 165 (3): 1221–1232. doi:10.1104/pp.114.240036. ISSN 1532-2548. PMC 4081333. PMID 24808100.
  22. ↑ Waters, Mark T.; Scaffidi, Adrian; Sun, Yueming K.; Flematti, Gavin R.; Smith, Steven M. (2014-08-01). "The karrikin response system of Arabidopsis". The Plant Journal 79 (4): 623–631. doi:10.1111/tpj.12430. ISSN 1365-313X.
  23. ↑ Waters, Mark T.; Scaffidi, Adrian; Moulin, Solène L. Y.; Sun, Yueming K.; Flematti, Gavin R.; Smith, Steven M. (2015-07-01). "A Selaginella moellendorffii Ortholog of KARRIKIN INSENSITIVE2 Functions in Arabidopsis Development but Cannot Mediate Responses to Karrikins or Strigolactones". The Plant Cell 27 (7): 1925–1944. doi:10.1105/tpc.15.00146. ISSN 1532-298X. PMC 4531350. PMID 26175507.
This article is issued from Wikipedia - version of the Thursday, January 21, 2016. The text is available under the Creative Commons Attribution/Share Alike but additional terms may apply for the media files.