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- 419University of Alberta, Department of Biological Sciences
- 81Mark A. Lewis
- 52Lewis, Mark A.
- 52Stockey, R.A.
- 23Wishart, D.S.
- 21Rothwell, G.W.
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Evolution of Conifer Diterpene Synthases: Diterpene Resin Acid Biosynthesis in Lodgepole Pine and Jack Pine Involves Monofunctional and Bifunctional Diterpene Synthases
Download2013-01-01
Jancsik, Sharon, Bohlmann, Jörg, Quesada, Alfonso L., Zerbe, Philipp, Yuen, Macaire, Hall, Dawn E., Dullat, Harpreet, Madilao, Lina L.
Diterpene resin acids (DRAs) are major components of pine (Pinus spp.) oleoresin. They play critical roles in conifer defense against insects and pathogens and as a renewable resource for industrial bioproducts. The core structures of DRAs are formed in secondary (i.e. specialized) metabolism via...
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2017-06-29
Rohan Bythell-Douglas,, Tom Bennett, Carl J Rothfels, Gane Ka-Shu Wong, David C Nelson, Sean W Graham, Dennis WD Stevenson
Background: Strigolactones (SLs) are a class of plant hormones that control many aspects of plant growth. The SL signalling mechanism is homologous to that of karrikins (KARs), smoke-derived compounds that stimulate seed germination. In angiosperms, the SL receptor is an α/β-hydrolase known as...
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2014-01-01
Alex Potapov, Ulrike E. Schlagel, Mark A. Lewis
We use an evolutionary approach to find “most appropriate” dispersal models for ecological applications. From a random walk with locally or nonlocally defined transition probabilities we derive a family of diffusion equations. We assume a monotonic dependence of its diffusion coefficient on...
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2017-04-04
Wong, Gane Ka-Shu , Rao, Guang-Yuan , Li, Xia , Rothfels, Carl J , Jiang, Chen-Kun , Han, Jing-Dan
eeds are one of the most significant innovations in the land plant lineage, critical to the diversification and adaptation of plants to terrestrial environments. From perspective of seed evo-devo, the most crucial developmental stage in this innovation is seed maturation, which includes...
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Evolutionary origins of sensation in metazoans: functional evidence for a new sensory organ in sponges
Download2014-02-11
Background One of the hallmarks of multicellular organisms is the ability of their cells to trigger responses to the environment in a coordinated manner. In recent years primary cilia have been shown to be present as ‘antennae’ on almost all animal cells, and are involved in cell-to-cell...
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2016-01-01
Range expansion and range shifts are crucial population responses to climate change. Genetic consequences are not well understood but are clearly coupled to ecological dynamics that, in turn, are driven by shifting climate conditions. We model a population with a deterministic reaction– diffusion...
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Experimental evidence for the rapid evolution of behavioral canalization in natural populations
Download2009
Lynch, B.R., Trussell, G.C., Palmer, A.R., Edgell, T.C.
Canalization—the evolutionary loss of the capacity of organisms to develop different phenotypes in different environments— is an evolutionary phenomenon suspected to occur widely, although examples in natural populations are elusive. Because behavior is typically a highly flexible component of an...
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2021-01-05
Pouria Ramazi, Mélodie Kunegel-Lion, Russell Greiner, Mark A. Lewis
Although ecological models used to make predictions from underlying covariates have a record of success, they also suffer from limitations. They are typically unable to make predictions when the value of one or more covariates is missing during the testing. Missing values can be estimated but...
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1999
Tenniswood, M., Bennett, S., Wong, P., Morrissey, C., Nitsche, E., Guenette, R.S.
After hormonal ablation, 90% of the secretory epithelial cells of the prostate undergo apoptosis, and the remaining cells are reorganized as the tissue is remodeled. Using differential display RT-PCR of total RNA extracted from the rat ventral prostate before and 4 days after castration, we have...