Catalogo Articoli (Spogli Riviste)

OPAC HELP

Titolo:
Studies on in vitro production of antimicrobial substances by Azotobacter chroococcum isolates/mutants
Autore:
Verma, S; Kumar, V; Narula, N; Merbach, W;
Indirizzi:
Haryana Agr Univ, Dept Microbiol, CCS, Hisar 125004, Haryana, India Haryana Agr Univ Hisar Haryana India 125004 Hisar 125004, Haryana, India Univ Halle Wittenberg, Inst Soil Sci & Plant Nutr, Fac Agr, D-06099 Halle,Germany Univ Halle Wittenberg Halle Germany D-06099 c Agr, D-06099 Halle,Germany
Titolo Testata:
ZEITSCHRIFT FUR PFLANZENKRANKHEITEN UND PFLANZENSCHUTZ-JOURNAL OF PLANT DISEASES AND PROTECTION
fascicolo: 2, volume: 108, anno: 2001,
pagine: 152 - 165
SICI:
0340-8159(200103)108:2<152:SOIVPO>2.0.ZU;2-W
Fonte:
ISI
Lingua:
ENG
Soggetto:
RHIZOCTONIA-SOLANI; BACILLUS-SUBTILIS; PSEUDOMONAS; GROWTH; SIDEROPHORES; DISEASE; WHEAT; ANTAGONISTS; INOCULATION; RHIZOSPHERE;
Keywords:
Azotobacter chroococcum; plant pathogen; antimicrobial substances; mustard; Rhizoctonia solani; Xanthomonas campestris;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
33
Recensione:
Indirizzi per estratti:
Indirizzo: Narula, N Haryana Agr Univ, Dept Microbiol, CCS, Hisar 125004, Haryana, India Haryana Agr Univ Hisar Haryana India 125004 004, Haryana, India
Citazione:
S. Verma et al., "Studies on in vitro production of antimicrobial substances by Azotobacter chroococcum isolates/mutants", Z PFLANZENK, 108(2), 2001, pp. 152-165

Abstract

An attempt was made to study the in-vitro production of antimicrobial/antifungal substances by various strains of Azotobacter chroococcum against various plant pathogens. In addition, nature and role of these substances werestudied on the germination and reduction in disease tinder) by Rhizoctoninsolani in mustard crop. About 37 % of Azotobacter chroococcum isolates/mutants showed a zone of inhibition against Rhizoctonia solani and 25 % against Xanthomonas campestris. Approximately 16% of isolates/mutants of A. chroococcum were siderophore positive (sid(+)). The antimicrobial substances in Azotobacter were found to be extracellular, proteinaceous in nature and seem to be associated with some complex material also. Seed germination of mustard Brassica juncea (L.) cv. 'RH 30' increased when treated with A. chroococcum isolate/mutants (29, 18 and mala 27) alone and in combination with plant pathogens, i.e., Rhizoctonia solani and Xanthomonas campestris. A soil pouch experiment conducted on B. juncea (L.) under pot house conditions showed that root rot caused by R. solani was significantly reduced by all the selected Azotobacter isolates/mutants. However, percent disease index was minimum with A. chroococcum 29, which was sid(-) also indicating that siderophore production alone might not have a role in decreasing plant pathogenicity.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 26/09/20 alle ore 14:46:53