Two alternative recessive quantitative trait loci influence resistance to spring black stem and leaf spot in Medicago truncatula.

ABSTRACT:

Background

Knowledge of the genetic basis of plant resistance to necrotrophic pathogens is incomplete and has been characterised in relatively few pathosystems. In this study, the cytology and genetics of resistance to spring black stem and leaf spot caused by Phoma medicaginis, an economically important necrotrophic pathogen of Medicago spp., was examined in the model legume M. truncatula.

Results

Macroscopically, the resistant response of accession SA27063 was characterised by small, hypersensitive-like spots following inoculation while the susceptible interaction with accessions A17 and SA3054 showed necrotic lesions and spreading chlorosis. No unique cytological differences were observed during early infection (<48 h) between the resistant and susceptible genotypes, exce

SUBMITTER: Kamphuis LG 

PROVIDER: S-EPMC2324085 | biostudies-literature | 2008 Mar

REPOSITORIES: biostudies-literature