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Titolo:
THE CPR5 MUTANT OF ARABIDOPSIS EXPRESSES BOTH NPR1-DEPENDENT AND NPR1-INDEPENDENT RESISTANCE
Autore:
BOWLING SA; CLARKE JD; LIU YD; KLESSIG DF; DONG XN;
Indirizzi:
DUKE UNIV,DEPT BOT,DEV CELL & MOL BIOL GRP,BOX 91000 DURHAM NC 27708 DUKE UNIV,DEPT BOT,DEV CELL & MOL BIOL GRP DURHAM NC 27708 RUTGERS STATE UNIV,WAKSMAN INST PISCATAWAY NJ 08855 RUTGERS STATE UNIV,DEPT MOL BIOL & BIOCHEM PISCATAWAY NJ 08855
Titolo Testata:
The Plant cell
fascicolo: 9, volume: 9, anno: 1997,
pagine: 1573 - 1584
SICI:
1040-4651(1997)9:9<1573:TCMOAE>2.0.ZU;2-0
Fonte:
ISI
Lingua:
ENG
Soggetto:
SYSTEMIC ACQUIRED-RESISTANCE; PLANT-DISEASE RESISTANCE; TOBACCO MOSAIC-VIRUS; SALICYLIC-ACID ACCUMULATION; GENE-EXPRESSION; ANTIFUNGAL PROTEINS; HOST-DEFENSE; CELL-DEATH; INDUCTION; SIGNAL;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Science Citation Index Expanded
Citazioni:
62
Recensione:
Indirizzi per estratti:
Citazione:
S.A. Bowling et al., "THE CPR5 MUTANT OF ARABIDOPSIS EXPRESSES BOTH NPR1-DEPENDENT AND NPR1-INDEPENDENT RESISTANCE", The Plant cell, 9(9), 1997, pp. 1573-1584

Abstract

The cpr5 mutant was identified from a screen for constitutive expression of systemic acquired resistance (SAR). This single recessive mutation also leads to spontaneous expression of chlorotic lesions and reduced trichome development. The cpr5 plants were found to be constitutively resistant to two virulent pathogens, Pseudomonas syringae pv maculicola ES4326 and Peronospora parasitica Noco2; to have endogenous expression of the pathogenesis-related gene 1 (PR-1); and to have an elevated level of salicylic acid (SA). Lines homozygous for cpr5 and eitherthe SA-degrading bacterial gene nahG or the SA-insensitive mutation npr1 do not express PR-1 or exhibit resistance to P. s. maculicola ES4326. Therefore, we conclude that cpm acts upstream of SA in inducing SAR. However, the cpr5 npr1 plants retained heightened resistance to P. parasitica Noco2 and elevated expression of the defensin gene PDF1.2, implying that NPR1-independent resistance signaling also occurs. We conclude that the cpr5 mutation leads to constitutive expression of bothan NPR1-dependent and an NPR1-independent SAR pathway. Identificationof this mutation indicates that these pathways are connected in earlysignal transduction steps and that they have overlapping functions inproviding resistance.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 09/04/20 alle ore 13:24:26