Botanical Arabidopsis Leaf SEM
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Arabidopsis
M1 stomate.007
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Arabidopsis
M1 tricome.009
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M1 tricome.001
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Research at Dartmouth College, using Arabidopsis
thaliana
The following information is from the Biology Department
web site and MCB web
site
.
Molecular Genetics of Metal Uptake:
Metal ions are critical nutrients yet overaccumulation of these same
metals can be toxic. Our long-range goal is to define the molecular
mechanism of metal ion uptake and its regulation in eukaryotic cells.
We are using a combined genetic, molecular, and biochemical approach to
examine iron and zinc uptake in the yeast Saccharomyces cerevisiae and
the plant Arabidopsis thaliana.
Dr. Guerinot's web page
A complete list of selected publications can be found at Dr.
Guerinot's web page.
Guerinot, M.L. and D. Eide. Zeroing in on zinc uptake in yeast and
plants. Current Opin. Plant Biol. 2: 244-249 (1999).
Molecular Genetic Analysis of Plant Circadian
Rhythm:
The ability of an organism to measure time
is the product of a cellular biological clock. Many phenomena
controlled by the biological clock cycle on a daily basis and are
called circadian rhythms. My goal is to understand the genetic and
biochemical mechanisms by which an organism measures time and uses that
temporal information to regulate gene expression and cellular
physiology. Plants are richly rhythmic and the circadian clock
regulates a number of key metabolic pathways and stress responses. In
addition, the circadian clock plays a critical role in the
photoperiodic regulation of the transition to flowering in many
species. My lab is taking genetic, molecular biological and
biochemical approaches to investigate circadian rhythmicity in the
model higher plant species, Arabidopsis thaliana.
Dr. McClung's Home page
A complete list of selected publications and links to the actual
journal articles can be found at Dr. McClung's web site.
McClung, C.R., Salomé, P.A., & T.P. Michael, 2002. The
Arabidopsis Circadian System. In: The Arabidopsis Book, eds. C.R.
Somerville and E.M. Meyerowitz, American Society of Plant Biologists,
Rockville, MD, DOI/10.1199/tab.0044 (add link button)
http://www.aspb.org/publications/arabidopsis/
Michael, T.P., P.A. Salomé, H.J. Yu, T.R. Spencer, E.L. Sharp,
J.M. Alonso, J.R. Ecker & C.R. McClung. 2003. Enhanced fitness
conferred by naturally occurring variation in the circadian clock.
Science 302: 1049-1053.
Michael, T.P., P.A. Salomé & C.R. McClung. 2003. Two
Arabidopsis circadian oscillators can be distinguished by differential
temperature sensitivity. Proc. Natl. Acad. Sci. USA. 100: 6878-6883.
Langmead, C.J., A.K. Yan, C.R. McClung & B. R. Donald. 2003.
Phase-Independent Rhythmic Analysis of Genome-Wide Expression Patterns.
J. Comput. Biol. 10:521-536.
Pathway of
Ethylene Signal Transduction in Arabidopsis
Plants make use of a diverse group of signaling compounds to regulate
growth and development. My laboratory uses a combination of
biochemical, molecular, and genetic strategies to analyze signaling
pathways in Arabidopsis, in particular the hormone receptors and the
initial steps in signal transduction. One of our focuses is on the
pathway of ethylene signal transduction. Ethylene serves as a
gaseous hormone in plants and is most widely known for its role in
fruit ripening. A second focus of ours is upon plant
two-component signaling systems. These are evolutionarily ancient
signaling systems, common in prokaryotes, which are now known to also
play essential roles in plant signal transduction.
Dr. G. Eric Schaller's web page
A complete list of publications can be found at Dr. Schaller's web page.
Zhao, X.-C., X. Qu, D.E. Mathews and G.E. Schaller Effect of ethylene
pathway mutations upon expression of the ethylene receptor ETR1 from
Arabidopsis. Plant Physiol. 130:1983-1991 (2002).
Schaller, G.E. and J.J. Kieber. Ethylene. in The Arabidopsis Book
(Somerville, C., and Meyerowitz, E., eds.) American Society of Plant
Biologists. Rockville, MD, DOI/10.1199/tab.0071 (2002). (add link
button) http://www.aspb.org/publications/arabidopsis/
Gao, Z., Chen, Y.-F., Randlett, M.D., Zhao, X.-C., Findell, J.L.,
Kieber, J.J., and Schaller, G.E. (2003) Localization of the Raf-like
kinase CTR1 to the endoplasmic reticulum of Arabidopsis through
participation in ethylene receptor signaling complexes. J. Biol. Chem.
278: 34725-34732
Molecular Genetics of Flower Development in Arabidopsis:
Angiosperm flowers consist of four organ
types: sepals, petals, stamens, and carpels. We are interested in
understanding the specification of organ identity in flowers of the
plant Arabidopsis thaliana. In particular, we are concentrating
our studies on the floral organ identity genes APETALA3 (AP3) and
PISTILLATA (PI). In ap3 and pi mutants, the petals are converted into
sepals, and the stamens into carpels. AP3 and PI are members of
the MADS transcription factor family. MADS proteins bind to DNA
as dimers. One project in the lab is focused on genetic and
biochemical characterization of components of the AP3/PI pathway.
A second project in the lab is focused on characterization of a
moderate-sized gene family in Arabidopsis called the reproductive
meristem gene family (REM). We are utilizing reverse genetics
techniques to elucidate the function of REM gene family
members.
Dr. Jack's Home page
Some recent publications:
Jack, T. (2002). New members of the floral organ identity
AGAMOUS pathway. Trends in Plant Science 17, 286-287.
Yang, Y., Fanning, L., and Jack, T. (2003). The K domain
mediates heterodimerization of the Arabidopsis floral organ identity
proteins, APETALA3 and PISTILLATA. Plant J. 33, 47-60.
Yang, Y., Xiang, H., and Jack, T. (2003). pistillata-5, an
Arabidopsis floral organ identity mutant with defects in petal
development. Plant J. 33, 177-188. **Contains SEM images of
floral parts
Jack, T. (2004). Molecular and genetic mechanisms of floral
control. Plant Cell, special issue on Plant Reproduction (in
press).