Nitrogen modulation of Medicago truncatula resistance to Aphanomyces euteiches depends on plant genotype.

ABSTRACT: Nitrogen (N) availability can impact plant resistance to pathogens by the regulation of plant immunity. To better understand the links between N nutrition and plant defence, we analysed the impact of N availability on Medicago truncatula resistance to the root pathogen Aphanomyces euteiches. This oomycete is considered to be the most limiting factor for legume production. Ten plant genotypes were tested in vitro for their resistance to A. euteiches in either complete or nitrate-deficient medium. N deficiency led to enhanced or reduced susceptibility depending on the plant genotype. Focusing on four genotypes displaying contrasting responses, we determined the impact of N deficiency on plant growth and shoot N concentration, and performed expression analyses on N- and defence-related genes,

SUBMITTER: Thalineau E 

PROVIDER: S-EPMC6638142 | biostudies-literature | 2018 Mar

REPOSITORIES: biostudies-literature