1. changes in the environment and changes in
expression: insight from oysters
Steven Roberts
University of Washington
School of Aquatic and Fishery Sciences
18. interleukin 17
•cytokine
•large number of cytokines found in vertebrates are not
found in invertebrates
•interleukin 17 is not similar to other interleukins
•vertebrates- interleukin expressed in
activated memory T cells
22. summary
•interleukin 17 could be an early cytokine present before
divergence of vertebrates and invertebrates
•expression analysis indicates it is a rapid response
signaling molecule
•complete signaling pathway and presence of other
molecules is not known in the oyster
32. summary
•multiple environmental stressors could contribute to
increase stressor susceptibility
•data suggests stress response could be at capacity and
not able to properly respond to secondary stressor
•organisms will likely adapt to chronic changes
•not clear how global change will affect normal
physiological processes
35. Transcriptomics
16 million
~40 bp
HQ reads
16 million
~40 bp
HQ reads
36. 32 million reads
v
17 million matched
Sigenae consensuses
29 thousand features
Upregulated features | min 10 unique hits & 2 fold increase
1329 1316
22 specific 25 specific
44. summary (biology)
•limited categorical differences
•selection and adaptation will play a significant role in
physiological response
•other normal physiological processes are occurring
(out of sync)
52. epigenetics: implications and direction
•Epigenetic variation will redefine our concept of
“genetic” diversity
•Novel mechanism impacted by environmental change
•long-term effects ?
•Candidate process that could explain other
phenomenon
53. conclusions & directions
• comparative and evolutionary aspects can provide valuable
insight into more complex systems
• with a better understanding of mechanisms, populations that
are better able to respond to stressors can be identified. This
information will be applicable for conservation, aquaculture,
and predicting ecosystem change.
• characterizing natural populations to better understand
biology and the environment will continue to be complex,
however deep sequencing will prove to be a valuable tool
54. acknowledgements
Yannick Gueguen (Ifremer)
Julien de Lorgeril (Ifremer)
Frederick Goetz (WATER Institute)
Giles Goetz (WATER Institute)
Samuel White (UW)
Rachel Thompson (UW - student)
Claire Horner-Devine (UW)
Mackenzie Gavery (UW - student) funding
Joth Davis (Taylor Shellfish) USDA-NRAC
Dustin Lennon (UW) NOAA SK Program
Paul Sampson (UW) UW-SAFS