Catalogo Articoli (Spogli Riviste)

OPAC HELP

Titolo:
Indole acetic acid attenuates disease severity in potato-Phytophthora infestans interaction and inhibits the pathogen growth in vitro
Autore:
Noel, GMAM; Madrid, EA; Bottini, R; Lamattina, L;
Indirizzi:
Univ Nacl Mar del Plata, Fac Ciencias Exactas & Nat, Inst Invest Biol, RA-7600 Mar Del Plata, Argentina Univ Nacl Mar del Plata Mar Del Plata Argentina RA-7600 Plata, Argentina Univ Nacl Rio Cuarto, Fac Ciencias Exactas Fisicoquim & Nat, Lab Fisiol Vegetal, RA-5800 Rio Cuarto, Argentina Univ Nacl Rio Cuarto Rio Cuarto Argentina RA-5800 Rio Cuarto, Argentina
Titolo Testata:
PLANT PHYSIOLOGY AND BIOCHEMISTRY
fascicolo: 9, volume: 39, anno: 2001,
pagine: 815 - 823
SICI:
0981-9428(200109)39:9<815:IAAADS>2.0.ZU;2-I
Fonte:
ISI
Lingua:
ENG
Soggetto:
HORMONAL-REGULATION; AUXIN; PROTEINS; EXPRESSION; DEFENSE; BETA-1,3-GLUCANASE; ACCUMULATION; SIGNALS; TOBACCO; METABOLISM;
Keywords:
beta-1,3 glucanase; chitinase; extensin; IAA; Phytophthora infestans; potato;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Life Sciences
Citazioni:
37
Recensione:
Indirizzi per estratti:
Indirizzo: Lamattina, L Univ Nacl Mar del Plata, Fac Ciencias Exactas & Nat, Inst Invest Biol, CC 1245, RA-7600 Mar Del Plata, Argentina Univ Nacl Mar del PlataCC 1245 Mar Del Plata Argentina RA-7600
Citazione:
G.M.A.M. Noel et al., "Indole acetic acid attenuates disease severity in potato-Phytophthora infestans interaction and inhibits the pathogen growth in vitro", PL PHYS BIO, 39(9), 2001, pp. 815-823

Abstract

Auxins are implicated in a wide variety of developmental and physiologicalprocesses in plants. Here, we studied the role of auxins on the interaction between a plant pathogen and its host. Excised potato leaves were pre-treated with different IAA concentrations and inoculated with a compatible race of the late blight agent Phytophthora infestans. A 10-muM IAA-treatment resulted in a 50 % reduction of disease severity, the extent of the protection being dose-dependent. In potato leaves upon inoculation with P. infestans, beta -1,3 glucanase, chitinase and extensin mRNA levels were down-modulated by 10 and 100 muM IAA. IAA also showed an antimicrobial activity in vitro. A 45 % growth inhibition of the P. infestans mycelia was observed in V8-agar medium containing 1 muM IAA. Again, the percentage of inhibition was dose-dependent. A 60 % depletion of fungal beta -1,3 glucanase activity wasfound in extracts from P. infestans growing in a medium containing 1 muM IAA. Furthermore, the IAA-mediated inhibitory effect of P. infestans mycelium growth was overcome by supplying the media with 1 ng(.)mL(-1) external beta -1,3 glucanase [(1,3;1,4)beta -D-glucan 3(4)-glucano hydrolase]. Thus, an IAA dose-dependent correlation can be established between inhibition of fungal growth, and down regulation of plant and fungal beta -1,3 glucanase. These results support a putative role of auxins in the potato-P. infestans patho-system as natural defence for pathogen spread and disease development. (C) 2001 Editions scientifiques et medicales Elsevier SAS.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 29/03/20 alle ore 15:14:33