PDF position for two years.
Starting January 2000
Qualifications: Ph.D. degree. Extensive knowledge of Molecular Biology,
working knowledge of Plant Physiology and Genetics.
STUDIES ON PHENOTYPIC PLASTICITY IN STELLARIA LONGIPES
Evolutionary biologists and ecologists use the term phenotypic
plasticity to describe the ability of an organism to alter its
morphology or development in response to changes in environment.
Understanding the mechanism
through which perception of critical aspects of environment is
translated into changes in growth and development is vital in
the ecological significance of plasticity.Plants usually respond to
signals by releasing hormones which in turn can act as endogenous
signals that initiate many physiological responses down stream.
Hormones can play a key role as mediators in transduction chains
can be involved in the regulation of
environment-induced plant responses such as timing and phenotypic
plasticity. Over the years, I have addressed some of the above
questions. After twenty years of my research on Stellaria longipes ,
(Caryophyllaceae) ,I propose this species as a good model system to
study genetic differentiation, phenotypic plasticity and
evolution. As elegantly stated by Harry Smith (1990) Plant, Cell &
a crucial point about phenotypic plasticity is that mechanisms
must exist through which
different physiological and developmental pathways are selected
common genotype. Using four ecotypes of S. longipes - alpine (dwarf,
nonplastic), montane & prairie (tall, plastic) & sand dune (tall,
nonplastic) populations in North America - I continue my
research interest further.
The following research projects are in progress.
A. Molecular evolution of the Stellaria longipes complex.
B. Genetic regulation of phenotypic plasticity.
1)To continue on the ACC synthase gene
expression studies and linking it to population biology and evolution.
2) We observed that alpine and prairie ecotypes respond differently
to various R/FR ratios hence understand the role of phytochromes on stem
Apply with CV to:
Professor of Biology
Department of Biological Sciences
University of Calgary
T2N 1N4 Canada
e-mail: ccchinna at ucalgary.ca