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Titolo:
SUPPRESSION OF FUSARIUM-WILT OF CARNATION BY PSEUDOMONAS-PUTIDA WCS358 AT DIFFERENT LEVELS OF DISEASE INCIDENCE AND IRON AVAILABILITY
Autore:
DUIJFF BJ; BAKKER PAHM; SCHIPPERS B;
Indirizzi:
UNIV UTRECHT,DEPT PLANT ECOL & EVOLUTIONARY BIOL,PLANT PATHOL SECT,POB 80084 3508 TB UTRECHT NETHERLANDS
Titolo Testata:
Biocontrol science and technology
fascicolo: 3, volume: 4, anno: 1994,
pagine: 279 - 288
SICI:
0958-3157(1994)4:3<279:SOFOCB>2.0.ZU;2-M
Fonte:
ISI
Lingua:
ENG
Soggetto:
F-SP DIANTHI; FLUORESCENT PSEUDOMONAS; ROOT COLONIZATION; SIDEROPHORES; RESISTANCE; STRAIN; SOIL; BIOSYNTHESIS; PATHOGENS; EDDHA;
Keywords:
BIOLOGICAL CONTROL; DISEASE INCIDENCE; FUSARIUM OXYSPORUM F SP DIANTHI; IRON AVAILABILITY; PSEUDOMONAS PUTIDA; SIDEROPHORES;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Science Citation Index Expanded
Science Citation Index Expanded
Citazioni:
34
Recensione:
Indirizzi per estratti:
Citazione:
B.J. Duijff et al., "SUPPRESSION OF FUSARIUM-WILT OF CARNATION BY PSEUDOMONAS-PUTIDA WCS358 AT DIFFERENT LEVELS OF DISEASE INCIDENCE AND IRON AVAILABILITY", Biocontrol science and technology, 4(3), 1994, pp. 279-288

Abstract

Treatment with Pseudomonas putida WCS358r, a rifampicin-resistant derivative of strain WCS358, significantly reduced fusarium wilt of carnation grown in rockwool if disease incidence was moderate, but not if disease incidence was high. Differences in disease incidence could intentionally be established by varying the inoculum density of the pathogen Fusarium oxysporum f. sp. dianthi (Fod). The effectiveness of disease suppression by WCS358r increased with decrease of inoculum density and consequently decrease of disease incidence. WCS358r and a Tn5 marked derivative of WCS358 (B243) reduced fusarium wilt of carnation mosteffectively if a low iron availability for the pathogen was established by adding unferrated or only partially ferrated ethylenediamine [di(o-hydroxphenylacetic) acid]. A Tn5 mutant of WCS358 defective in siderophore biosynthesis (JM218) did not reduce disease incidence. Siderophore production and inhibition of Fod by WCS358r in vitro decreased with increasing iron availability supporting the more effective disease suppression by strains WCS358r and B243 at low iron availability, Siderophote-mediated competition for iron was shown to be the mechanism ofsuppression of fusarium wilt of carnation by P. putida WCS358. Its effectivity was highest at a low iron availability and at a moderate disease incidence.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 27/11/20 alle ore 16:09:17