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Titolo:
DISSECTION OF THE SALICYLIC-ACID SIGNALING PATHWAY IN TOBACCO
Autore:
MALAMY J; SANCHEZCASAS P; HENNIG J; GUO AL; KLESSIG DF;
Indirizzi:
RUTGERS STATE UNIV,WAKSMAN INST,POB 759 PISCATAWAY NJ 08855 RUTGERS STATE UNIV,WAKSMAN INST PISCATAWAY NJ 08855 RUTGERS STATE UNIV,DEPT BIOCHEM & MOL BIOL PISCATAWAY NJ 08855
Titolo Testata:
Molecular plant-microbe interactions
fascicolo: 6, volume: 9, anno: 1996,
pagine: 474 - 482
SICI:
0894-0282(1996)9:6<474:DOTSSP>2.0.ZU;2-P
Fonte:
ISI
Lingua:
ENG
Soggetto:
SYSTEMIC ACQUIRED-RESISTANCE; PATHOGENESIS-RELATED PROTEINS; PLANT DEFENSE RESPONSES; VIRUS-INFECTED TOBACCO; SYRINGAE-PV-SYRINGAE; MOSAIC-VIRUS; 2,6-DICHLOROISONICOTINIC ACID; TRANSLOCATED SIGNAL; DISEASE RESISTANCE; POLYACRYLIC-ACID;
Keywords:
ACQUIRED RESISTANCE; SIGNAL TRANSDUCTION;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Science Citation Index Expanded
Science Citation Index Expanded
Citazioni:
52
Recensione:
Indirizzi per estratti:
Citazione:
J. Malamy et al., "DISSECTION OF THE SALICYLIC-ACID SIGNALING PATHWAY IN TOBACCO", Molecular plant-microbe interactions, 9(6), 1996, pp. 474-482

Abstract

Certain chemicals induce the accumulation of pathogenesis-related (PR) proteins and enhance resistance to tobacco mosaic virus (TMV) in tobacco at the application site, These compounds include polyacrylic acid(PAA), thiamine, L-alpha-amino butyric acid, barium chloride, 2-thiouracil, beta-1,4-endoxylanase and 2,6-dichloroisonicotinic acid (INA), Because there is considerable evidence that salicylic acid (SA) is an endogenous signal leading to PR gene expression and enhanced resistance following TMV infection, we evaluated these chemicals to see if theyact via SA, We report here that all of the compounds tested except INA induced stable accumulation of the glucoside of SA (SAG), probably via transient or low level production of SA. Thiamine induction of PR-1gene expression and enhanced resistance to TMV was significantly reduced in salicylate hydroxylase-producing transgenic plants which are unable to accumulate SA. In contrast, induction of PR-1 gene expression and enhanced resistance to TMV by PAA was similar in the transgenic and wild-type plants, Furthermore, thiamine induction of SAG accumulation was blocked at elevated temperatures, whereas PAA was still effective, This suggests the presence of multiple pathways that lead to defense responses, one of which is independent of SA, As PAA, thiamine, and INA enter the pathway(s) leading to PR-1 gene expression and enhanced resistance via distinct mechanisms, they should provide chemical toolsfor dissection of these pathways.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 29/03/20 alle ore 18:19:34