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Titolo:
Establishment of phosphate-solubilizing strains of Azotobacter chroococcumin the rhizosphere and their effect on wheat cultivars under green house conditions
Autore:
Kumar, V; Behl, RK; Narula, N;
Indirizzi:
Haryana Agr Univ, CCS, Dept Microbiol, Hisar 125004, Haryana, India Haryana Agr Univ Hisar Haryana India 125004 Hisar 125004, Haryana, India
Titolo Testata:
MICROBIOLOGICAL RESEARCH
fascicolo: 1, volume: 156, anno: 2001,
pagine: 87 - 93
SICI:
0944-5013(2001)156:1<87:EOPSOA>2.0.ZU;2-G
Fonte:
ISI
Lingua:
ENG
Soggetto:
TRITICUM-AESTIVUM; BACTERIA; MICROORGANISMS; RHIZOBACTERIA; AUXINS; SOIL;
Keywords:
Azotabacter chroococcum; phytohormone; Triticum aestivum; phosphate solubilisation; phosphate solubilizing bacteria (PSB);
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
27
Recensione:
Indirizzi per estratti:
Indirizzo: Narula, N Haryana Agr Univ, CCS, Dept Microbiol, Hisar 125004, Haryana, India Haryana Agr Univ Hisar Haryana India 125004 004, Haryana, India
Citazione:
V. Kumar et al., "Establishment of phosphate-solubilizing strains of Azotobacter chroococcumin the rhizosphere and their effect on wheat cultivars under green house conditions", MICROBI RES, 156(1), 2001, pp. 87-93

Abstract

A pot experiment was conducted in the green house to investigate the establishment of phosphate sorubilizing strains of Azotobacter chroococcum, including soil isolates and their mutants, in the rhizosphere and their effect on growth parameters and root biomass of three genetically divergent wheat cultivars (Triticum aestivum L.). Five fertilizer treatments were performed: Control, 90 kg N ha(-1), 90 kg N + 60 kg P2O5, ha(-1), 120 kg N ha(-1) and 120 kg N + 60 kg P2O5 ha(-1). Phosphate solubilizing and phytohormone producing parent soil isolates and mutant strains of A. chroococcum were isolated and selected by an enrichment method. In vitro phosphate solubilizationand growth hormone production by mutant strains was increased compared with soil isolates. Seed inoculation of wheat varieties with P solubilizing and phytohormone producing A. chroococcum showed better response compared with controls. Mutant strains of A. chroococcum showed higher increase in grain (12.6%) and straw (11.4%) yield over control and their survival (12-14%) in the rhizosphere as compared to their parent soil isolate (P4). Mutant strain M37 performed better in all three varieties in terms of increase in grain yield (14.0%) and root biomass (11.4%) over control.

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Documento generato il 06/04/20 alle ore 02:03:49