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United States Department of Agriculture

Agricultural Research Service

Research Project: Genetic Enhancement of Common Bean Using Exotic Germplasm for Biotic and Abiotic Stress Tolerance

Location: Tropical Crops and Germplasm Research

Title: Ureide accumulation and abiotic stress resistance in a population of common bean, tepary bean and interspecific hybrids

Authors
item Soute, J. -
item Bett, K. -
item Porch, Timothy
item Todd, C -

Submitted to: International Conference on Legume Genomics and Genetics
Publication Type: Abstract Only
Publication Acceptance Date: April 30, 2014
Publication Date: N/A

Technical Abstract: Introducing stress tolerance in Phaseolus vulgaris (common bean) is necessary to increase production in areas where bean has limited growth due to environmental constraints. A relative which shows higher abiotic stress tolerance, Phaseolus acutifolius (tepary bean), has been used to develop interspecific hybrids with the intention of transferring genes for improving stress tolerance to common bean. A comparison of abiotic stress tolerance under conditions of chilling and drought between tepary bean, common bean and interspecific hybrids will be presented. Ureide accumulation and the merit of using ureide quantification as a tool to measure abiotic stress in this population is being evaluated. Ureides are the product of nitrogen fixation in tropical legumes and ureide concentration has been used as a tool to assess rates of nitrogen fixation. Ureides are also generated during purine remobilization and may serve as scavengers of reactive oxygen species during abiotic stress.

Last Modified: 12/19/2014
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