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Titolo:
Constitutive salicylic acid-dependent signaling in cpr1 and cpr6 mutants requires PAD4
Autore:
Jirage, D; Zhou, N; Cooper, B; Clarke, JD; Dong, XN; Glazebrook, J;
Indirizzi:
Torrey Mesa Res Inst, San Diego, CA 92121 USA Torrey Mesa Res Inst San Diego CA USA 92121 Inst, San Diego, CA 92121 USA Univ Maryland, Inst Biotechnol, Ctr Agr Biotechnol, College Pk, MD 20742 USA Univ Maryland College Pk MD USA 20742 iotechnol, College Pk, MD 20742 USA Duke Univ, Dev Cell & Mol Biol Grp, Dept Biol, Durham, NC 27708 USA Duke Univ Durham NC USA 27708 l Biol Grp, Dept Biol, Durham, NC 27708 USA
Titolo Testata:
PLANT JOURNAL
fascicolo: 4, volume: 26, anno: 2001,
pagine: 395 - 407
SICI:
0960-7412(200105)26:4<395:CSASIC>2.0.ZU;2-K
Fonte:
ISI
Lingua:
ENG
Soggetto:
SYSTEMIC ACQUIRED-RESISTANCE; ENHANCED DISEASE SUSCEPTIBILITY; PHYTOALEXIN-DEFICIENT MUTANTS; POLYMERASE-CHAIN-REACTION; ARABIDOPSIS-THALIANA; DEFENSE RESPONSES; CELL-DEATH; TRANSCRIPTION FACTORS; GENE-EXPRESSION; PR-1 GENE;
Keywords:
cpr; pad4; dnd; camalexin; salicylic acid; pathogenesis related; defensin;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Life Sciences
Citazioni:
51
Recensione:
Indirizzi per estratti:
Indirizzo: Glazebrook, J Torrey Mesa Res Inst, 3115 Merryfield Row, San Diego, CA 92121 USA Torrey Mesa Res Inst 3115 Merryfield Row San Diego CA USA 92121
Citazione:
D. Jirage et al., "Constitutive salicylic acid-dependent signaling in cpr1 and cpr6 mutants requires PAD4", PLANT J, 26(4), 2001, pp. 395-407

Abstract

Salicylic acid (SA)-dependent signaling controls activation of a set of plant defense mechanisms that are important for resistance to a variety of microbial pathogens. Many Arabidopsis mutants that display altered SA-dependent signaling have been isolated. We used double mutant analysis to determine the relative positions of the pad4, cpr1, cpr5, cpr6, dnd1 and dnd2 mutations in the signal transduction network leading to SA-dependent activation of defense gene expression and disease resistance. The pad4 mutation causesfailure of SA accumulation in response to infection by certain pathogens, while the other mutations cause constitutively high levels of SA, defense gene expression and resistance. The cpr7 pad4, cpr5 pad4, cpr6 pad4, dnd1 pad4 and dnd2 pad4 double mutants were constructed and assayed for stature, presence of spontaneous lesions, resistance to Pseudomonas syringae and Peronospora parasitica, SA levels, expression of PAD4 PR-I and PDF1.2 and accumulation of camalexin. We found that the effects of the cpr1 and cpr6 mutations on SA-dependent gene expression are completely dependent on PAD4 function. In contrast, SA accumulation in the lesion-mimic mutant cpr5 is partially PAD4-independent, while in dnd1 and dnd2 mutants it is completely PAD4-independent. A model describing a possible arrangement of activities in the signal transduction network is presented.

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Documento generato il 04/04/20 alle ore 08:46:22