Program overview

My primary research interests are in the physiological and molecular mechanisms of plant interactions with the physical environment. Past research subjects have included air pollutant injury, root cell plasticity in response to nutrient deficiency, plant behavioral movements in response to light and temperature, and plant response to global change (elevated CO2).

Currently my program is focused on the regulation of seasonal dormancy in perennials. One emphasis is the regulation of growth cessation and bud formation in perennials as part of the developmental program that prepares plants to survive potentially damaging winter conditions. Despite being one of the most dramatic landscape and ecosystem events of the annual cycle, very little is known about the physiological and genetic regulation of dormancy in perennial species. Ultimately, a goal is to contribute to assembling a pathway of events from perception of the signal(s) for dormancy induction through to the developmental events associated with bud formation and endodormancy development. A second emphasis is on the molecular and physiological mechanisms of the quantitative chilling requirement for spring bud break. Chilling requirement is a fascinating example of biological 'counting' of the time of cold exposure and is of significant interest to horticulturalists and ecologists alike.

Friday, April 2, 2010

Peach genome sequence released!!!



The peach genome (v1.0) sequence, assembly and annotation was released on Apr. 1 2010.

The above image is a photo of the specific individual tree that was used for the sequence. The tree is a dihaploid of the Lovell rootstock which greatly reduced genetic variation in the sequence and aided smooth assembly of the genome. The genome is about one-half the size (approx. 220Mb on eight chromosomes) of the previously sequenced Populus trichocarpa genome. The sequencing and annotation project has been organized by Dr. Bryon Sosinski (NCSU) and will be updated to include the many high-quality genetic maps that exist within Prunus.

Note that all use of the peach genome sequences in the next several months will be subject to the Fort Lauderdale agreement as described on the GDR website.

See the Clemson press release here: http://www.clemson.edu/media-relations/article.php?article_id=2686

Links to the genome sequence can be found at the Genome Database for Rosaceae (GDR): http://www.rosaceae.org/peach/genome

33 comments:

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