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Titolo:
Characterization of a new Arabidopsis mutant exhibiting enhanced disease resistance
Autore:
Silva, H; Yoshioka, K; Dooner, HK; Klessig, DF;
Indirizzi:
Rutgers State Univ, Waksman Inst, Piscataway, NJ 08854 USA Rutgers State Univ Piscataway NJ USA 08854 Inst, Piscataway, NJ 08854 USA
Titolo Testata:
MOLECULAR PLANT-MICROBE INTERACTIONS
fascicolo: 12, volume: 12, anno: 1999,
pagine: 1053 - 1063
SICI:
0894-0282(199912)12:12<1053:COANAM>2.0.ZU;2-H
Fonte:
ISI
Lingua:
ENG
Soggetto:
SYSTEMIC ACQUIRED-RESISTANCE; TOBACCO MOSAIC-VIRUS; OXIDATIVE CROSS-LINKING; SALICYLIC-ACID; HYPERSENSITIVE RESPONSE; CELL-DEATH; GENE; EXPRESSION; INDUCTION; PROTEIN;
Keywords:
nahG; pathogen resistance; systemic acquired resistance;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Life Sciences
Citazioni:
50
Recensione:
Indirizzi per estratti:
Indirizzo: Klessig, DF Rutgers State Univ, Waksman Inst, 190 Frelinghuysen Rd, Piscataway, NJ 08854 USA Rutgers State Univ 190 Frelinghuysen Rd Piscataway NJ USA 08854
Citazione:
H. Silva et al., "Characterization of a new Arabidopsis mutant exhibiting enhanced disease resistance", MOL PL MICR, 12(12), 1999, pp. 1053-1063

Abstract

In many plant-pathogen interactions, resistance is associated with the synthesis and accumulation of salicylic acid (SA) and pathogenesis-related (PR) proteins. At least two general classes of mutants with altered resistanceto pathogen attack have been identified in Arabidopsis. One class exhibitsincreased susceptibility to pathogen infection; the other class exhibits enhanced resistance to pathogens. In an attempt to identify mutations in resistance-associated loci, we screened a population of T-DNA tagged Arabidopsis thaliana ecotype Wassilewskija (Ws) for mutants showing constitutive expression of the PR-1 gene (cep), A mutant was isolated and shown to constitutively express PR-1, PR-2, and PR-5 genes, This constitutive phenotype segregated as a single recessive trait in the Ws genetic background. The mutantalso had elevated levels of SA, which are responsible for the cep phenotype, The cep mutant spontaneously formed hypersensitive response (HR)-like lesions on the leaves and cotyledons and also exhibited enhanced resistance to virulent bacterial and fungal pathogens. Genetic analyses of segregating progeny from outcrosses to other ecotypes unexpectedly revealed that alterations in more than one gene condition the constitutive expression of PR genes in the original mutant. One of the mutations, designated cpr20, maps to the lower arm of chromosome 4 and is required for the cep phenotype. Another mutation, which has been termed cpr21, maps to chromosome 1 and is often,but not always, associated with this phenotype, The recessive nature of the cep trait suggests that the CPR20 and CPR21 proteins may act as negative regulators in the disease resistance signal transduction pathway.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 30/03/20 alle ore 18:55:03