Page Banner

United States Department of Agriculture

Agricultural Research Service

Research Project: FUNCTIONAL GENOMICS FOR IMPROVING NUTRIENTS AND QUALITY IN ALFALFA AND SOYBEAN Title: Investigating nitrogen deficiency in common beans

Authors
item O'Rourke, Jamie
item Iniguez, Luis -
item Bucciarelli, Bruna
item Woodey, Jenna -
item Shoemaker, Randy
item Graham, Michelle
item Cannon, Steven
item Mcclean, Phillip -
item Jackson, Scott -
item Hernandez, Georgina -
item Vance, Carroll

Submitted to: Biennial Conference on Molecular and Cellular Biology of the Soybean
Publication Type: Abstract Only
Publication Acceptance Date: August 11, 2012
Publication Date: August 13, 2012
Citation: O'Rourke, J.A., Iniguez, L.P., Bucciarelli, B., Woodey, J.L., Shoemaker, R.C., Graham, M.A., Cannon, S.B., Mcclean, P.E., Jackson, S.A., Hernandez, G., Vance, C.P. 2012. Investigating nitrogen deficiency in common beans [abstract]. Molecular & Cellular Biology of the Soybean Conference, August 12-15, 2012, Des Moines, Iowa. Available: http://www.extension.iastate.edu/registration/events/soybean/speakeranchor.htm#speaker16.

Technical Abstract: Phaseolus vulgaris (common bean) and soybean diverged from a common ancestor approximately 19 million years ago. The genome of P. vulgaris is approximately half the size of soybean, making it an excellent model for soybean genetics. Nitrogen (N) is often a growth-limiting nutrient, and N deficiency results in reduced yield. N deficiency is also highly correlated with drought stress, an increasing problem due to global climate change. We performed next generation sequencing (RNAseq) on leaves, roots, and nodules of P. vulgaris cv. Negro jamapa plants that were inoculated with an effective rhizobium, an ineffective rhizobium mutant strain (fix-), or that were provided nitrogen via fertilization. Pathways involved in N assimilation and utilization were examined to determine the effect of fertilization vs. symbiotic N fixation and N deficiency on gene expression patterns. We have identified sequences uniquely expressed in each tissue dependent on the source of available N. Additionally, we have identified the homologous sequences in soybean and have compared gene expression patterns between the two legume species.

Last Modified: 12/26/2014
Footer Content Back to Top of Page