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Titolo:
A humidity-sensitive Arabidopsis copine mutant exhibits precocious cell death and increased disease resistance
Autore:
Jambunathan, N; Siani, JM; McNellis, TW;
Indirizzi:
Penn State Univ, Dept Plant Pathol, University Pk, PA 16802 USA Penn StateUniv University Pk PA USA 16802 l, University Pk, PA 16802 USA Penn State Univ, Intercoll Grad Program Plant Physiol, University Pk, PA 16802 USA Penn State Univ University Pk PA USA 16802 l, University Pk, PA 16802 USA
Titolo Testata:
PLANT CELL
fascicolo: 10, volume: 13, anno: 2001,
pagine: 2225 - 2240
SICI:
1040-4651(200110)13:10<2225:AHACME>2.0.ZU;2-6
Fonte:
ISI
Lingua:
ENG
Soggetto:
SYSTEMIC ACQUIRED-RESISTANCE; DEFENSE RESPONSES; HYPERSENSITIVE RESPONSE; TRANSGENIC TOBACCO; PATHOGEN DEFENSE; OXIDATIVE BURST; AVIRULENCE GENE; METAL TOXICITY; ION-CHANNEL; EXPRESSION;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Life Sciences
Citazioni:
67
Recensione:
Indirizzi per estratti:
Indirizzo: McNellis, TW Penn State Univ, Dept Plant Pathol, 212 Buckhout Lab, University Pk, PA 16802 USA Penn State Univ 212 Buckhout Lab University Pk PA USA 16802 A
Citazione:
N. Jambunathan et al., "A humidity-sensitive Arabidopsis copine mutant exhibits precocious cell death and increased disease resistance", PL CELL, 13(10), 2001, pp. 2225-2240

Abstract

The copines are a newly identified class of calcium-dependent, phospholipid binding proteins that are present in a wide range of organisms, includingParamecium, plants, Caenorhabditis elegans, mouse, and human. However, thebiological functions of the copines are unknown. Here, we describe a humidity-sensitive copine mutant in Arabidopsis. Under nonpermissive, low-humidity conditions, the cpn1-1 mutant displayed aberrant regulation of cell death that included a lesion mimic phenotype and an accelerated hypersensitive response (HR). However, the HR in cpn1-1 showed no increase in sensitivity to low pathogen titers. Low-humidity-grown cpn1-1 mutants also exhibited morphological abnormalities, increased resistance to virulent strains of Pseudomonas syringae and Peronospora parasitica, and constitutive expression ofpathogenesis-related (PR) genes. Growth of cpn1-1 under permissive, high-humidity conditions abolished the increased disease resistance, lesion mimic, and morphological mutant phenotypes but only partially alleviated the accelerated HR and constitutive PR gene expression phenotypes. The disease resistance phenotype of cpn1-1 suggests that the CPN1 gene regulates defense responses. Alternatively, the primary function of CPN1 may be the regulationof plant responses to low humidity, and the effect of the cpn1-1 mutation on disease resistance may be indirect.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 05/04/20 alle ore 19:07:25