Alfalfa root stained with propidium iodide, 48 hours after inoculation with
Sinorhizobium meliloti. The actively dividing cells of the developing nodule
stain pink. Photo by Melanie Barnett
Alfalfa root stained with propidium
iodide, 48 hours after inoculation with
Sinorhizobium meliloti. The actively dividing cells of the
developing nodule
stain pink. Photo by Melanie Barnett
I am a senior research scientist in the lab group of Dr. Sharon R. Long. Our group studies the symbiotic, nitrogen-fixing bacterium, Sinorhizobium meliloti and its leguminous host plants (members of the genera, Medicago, Trigonella, Melilotus.) My research projects include characterization of symbiotic genes, regulatory circuits, S. meliloti genomics and global expression analysis.
Alfalfa nodule elicited by an
S. meliloti strain containing a syrA::gusA fusion.
This hand section was stained with X-gluc; the plant cells containing
bacteroids
stain blue. Photo by Melanie Barnett.
Longitudinal section of 3 day old
emergent alfalfa nodule, stained with
DAPI & acridine orange, showing actively dividing cells. (Melanie
Barnett)