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Titolo:
Activation of a diverse set of genes during the tobacco resistance response to TMV is independent of salicylic acid; induction of a subset is also ethylene independent
Autore:
Guo, AL; Salih, G; Klessig, DF;
Indirizzi:
Rutgers State Univ, Waksman Inst, Piscataway, NJ 08854 USA Rutgers State Univ Piscataway NJ USA 08854 Inst, Piscataway, NJ 08854 USA Rutgers State Univ, Dept Mol Biol & Biochem, Piscataway, NJ 08854 USA Rutgers State Univ Piscataway NJ USA 08854 chem, Piscataway, NJ 08854 USA
Titolo Testata:
PLANT JOURNAL
fascicolo: 5, volume: 21, anno: 2000,
pagine: 409 - 418
SICI:
0960-7412(200003)21:5<409:AOADSO>2.0.ZU;2-V
Fonte:
ISI
Lingua:
ENG
Soggetto:
SYSTEMIC ACQUIRED-RESISTANCE; MOSAIC-VIRUS; MICROBIAL PATHOGENS; SIGNAL-TRANSDUCTION; ARABIDOPSIS; JASMONATE; EXPRESSION; DEFENSE; PLANTS; BIOSYNTHESIS;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Life Sciences
Citazioni:
42
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:
A.L. Guo et al., "Activation of a diverse set of genes during the tobacco resistance response to TMV is independent of salicylic acid; induction of a subset is also ethylene independent", PLANT J, 21(5), 2000, pp. 409-418

Abstract

Through differential screening of a cDNA library, we cloned six groups of genes that are expressed relatively early in the inoculated leaves of tobacco resisting infection by tobacco mosaic virus (TMV). Induction of all these genes was subsequently detected in the uninoculated leaves; thus, their expression is associated with the development of both local and systemic acquired resistance. Exogenously applied salicylic acid (SA) was observed to induce these genes transiently. However, analyses with transgenic NahG plants, which are unable to accumulate SA, demonstrated that expression of thesegenes in TMV-inoculated leaves is mediated via an SA-independent pathway. Because the expression kinetics of these genes differ from those associatedwith the well-characterized pathogenesis-related protein (PR-1) and phenylalanine ammonia-lyase (PAL) genes, we propose that they belong to a group which we designate SIS, for SA-independent, systemically induced genes. Interestingly, the expression of several SIS genes in the uninoculated leaves of TMV-infected NahG plants was delayed and/or reduced, raising the possibility that SA is involved in activating some of these genes in systemic tissue. Most of the SIS genes were induced by exogenous ethylene. However, analyses of infected NahG plants treated with ethylene action and/or synthesis inhibitors indicated that the TMV-induced expression of several SIS genes isindependent of ethylene as well as SA.

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Documento generato il 06/04/20 alle ore 20:06:14