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Characterization of beneficial properties of plant growth-promoting rhizobacteria isolated from sweet potato rhizosphere

Laboratory study was conducted to characterize the beneficial properties of plant growth-promoting rhizobacterial (PGPR) strains isolated from sweet potato rhizosphere. Fifteen rhizobacterial (PGPR) strains were screened for indole acetic acid (IAA) production with and without addition of the precur...

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Main Authors: Yasmin, Farzana, Othman, Radziah, Sijam, Kamaruzaman, Saad, Mohd Said
Format: Article
Language:English
Published: Academic Journals 2009
Online Access:http://psasir.upm.edu.my/id/eprint/11491/1/Characterization_of_beneficial_properties.pdf
http://psasir.upm.edu.my/id/eprint/11491/
http://www.academicjournals.org/journal/AJMR/article-abstract/B03FCB214835
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spelling my.upm.eprints.114912017-11-20T03:03:03Z http://psasir.upm.edu.my/id/eprint/11491/ Characterization of beneficial properties of plant growth-promoting rhizobacteria isolated from sweet potato rhizosphere Yasmin, Farzana Othman, Radziah Sijam, Kamaruzaman Saad, Mohd Said Laboratory study was conducted to characterize the beneficial properties of plant growth-promoting rhizobacterial (PGPR) strains isolated from sweet potato rhizosphere. Fifteen rhizobacterial (PGPR) strains were screened for indole acetic acid (IAA) production with and without addition of the precursor L-tryptophan (L-TRP), phosphate-solubilizing activity, and nitrogen production, antagonistic activity against fungal pathogens, siderophore production and intrinsic antibiotic resistance. Results of the laboratory study showed that 15 rhizobacterial isolates were able to produce indole acetic acid (IAA). The concentration of IAA produced ranged from 3.84 - 13.33mg L-1. Addition of L-tryptophan (L-TRP) to the bacterial isolates increased the production of IAA ranging from 4.94 - 46.66 mg L-1. Six isolates (40%) were able to solubilize insoluble phosphate as evident by production of clear zone on calcium phosphate medium. All isolates were able to grow in N-free media indicating their abilities to produce nitrogen which ranged from 0.74 - 1.32 ppm. Three of the isolates produced fluorescent pigment on agar plate indicated their abilities to produce siderophores. Four isolates were able to inhibit the fungal pathogens Rhizoctonia sp.and Pythium sp. The intrinsic antibiotic test showed that all isolates were resistant against chloramphenicol (10 and 30 µg mL-1), Streptomycin (10 µg mL-1), Kanamycin (5 and 30 µg mL-1), Penicillin (10 µg mL-1) and tetracyclin (30 µg mL-1). The rhizobacterial isolates showed the several beneficial traits that could improve plant growth. Academic Journals 2009 Article PeerReviewed application/pdf en http://psasir.upm.edu.my/id/eprint/11491/1/Characterization_of_beneficial_properties.pdf Yasmin, Farzana and Othman, Radziah and Sijam, Kamaruzaman and Saad, Mohd Said (2009) Characterization of beneficial properties of plant growth-promoting rhizobacteria isolated from sweet potato rhizosphere. African Journal of Microbiology Research, 3 (11). art. no. B03FCB214835. pp. 815-821. ISSN 1996-0808 http://www.academicjournals.org/journal/AJMR/article-abstract/B03FCB214835
institution Universiti Putra Malaysia
building UPM Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Putra Malaysia
content_source UPM Institutional Repository
url_provider http://psasir.upm.edu.my/
language English
description Laboratory study was conducted to characterize the beneficial properties of plant growth-promoting rhizobacterial (PGPR) strains isolated from sweet potato rhizosphere. Fifteen rhizobacterial (PGPR) strains were screened for indole acetic acid (IAA) production with and without addition of the precursor L-tryptophan (L-TRP), phosphate-solubilizing activity, and nitrogen production, antagonistic activity against fungal pathogens, siderophore production and intrinsic antibiotic resistance. Results of the laboratory study showed that 15 rhizobacterial isolates were able to produce indole acetic acid (IAA). The concentration of IAA produced ranged from 3.84 - 13.33mg L-1. Addition of L-tryptophan (L-TRP) to the bacterial isolates increased the production of IAA ranging from 4.94 - 46.66 mg L-1. Six isolates (40%) were able to solubilize insoluble phosphate as evident by production of clear zone on calcium phosphate medium. All isolates were able to grow in N-free media indicating their abilities to produce nitrogen which ranged from 0.74 - 1.32 ppm. Three of the isolates produced fluorescent pigment on agar plate indicated their abilities to produce siderophores. Four isolates were able to inhibit the fungal pathogens Rhizoctonia sp.and Pythium sp. The intrinsic antibiotic test showed that all isolates were resistant against chloramphenicol (10 and 30 µg mL-1), Streptomycin (10 µg mL-1), Kanamycin (5 and 30 µg mL-1), Penicillin (10 µg mL-1) and tetracyclin (30 µg mL-1). The rhizobacterial isolates showed the several beneficial traits that could improve plant growth.
format Article
author Yasmin, Farzana
Othman, Radziah
Sijam, Kamaruzaman
Saad, Mohd Said
spellingShingle Yasmin, Farzana
Othman, Radziah
Sijam, Kamaruzaman
Saad, Mohd Said
Characterization of beneficial properties of plant growth-promoting rhizobacteria isolated from sweet potato rhizosphere
author_facet Yasmin, Farzana
Othman, Radziah
Sijam, Kamaruzaman
Saad, Mohd Said
author_sort Yasmin, Farzana
title Characterization of beneficial properties of plant growth-promoting rhizobacteria isolated from sweet potato rhizosphere
title_short Characterization of beneficial properties of plant growth-promoting rhizobacteria isolated from sweet potato rhizosphere
title_full Characterization of beneficial properties of plant growth-promoting rhizobacteria isolated from sweet potato rhizosphere
title_fullStr Characterization of beneficial properties of plant growth-promoting rhizobacteria isolated from sweet potato rhizosphere
title_full_unstemmed Characterization of beneficial properties of plant growth-promoting rhizobacteria isolated from sweet potato rhizosphere
title_sort characterization of beneficial properties of plant growth-promoting rhizobacteria isolated from sweet potato rhizosphere
publisher Academic Journals
publishDate 2009
url http://psasir.upm.edu.my/id/eprint/11491/1/Characterization_of_beneficial_properties.pdf
http://psasir.upm.edu.my/id/eprint/11491/
http://www.academicjournals.org/journal/AJMR/article-abstract/B03FCB214835
_version_ 1643824821538127872
score 13.211869

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