Identification of phosphate-solubilizing fungi from the asparagus rhizosphere as antagonists of the root and crown rot pathogen Fusarium oxysporum

Ruangsanka, Samaporn

doi:10.2306/scienceasia1513-1874.2014.40.016

Cited by 22 publications

(10 citation statements)

References 7 publications

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“…In present study the phosphate solubilization index of the isolate recorded was 3.9. The ratios for bacteria in this study were much higher than 1.17-2.96 for phosphate-solubilising fungi in asparagus root zone [17]. Islam et al [18] reported the phosphate solubilization index of the rice isolates varied from 1.2 to 6.7.…”

Section: Phosphate Solubilization Activitycontrasting

confidence: 49%

Klebsiella pneumoniae VRE36 as a PGPR isolated from Saccharum officinarum cultivar Co99004

Bhardwaj¹,

Shah²,

Joshi³

et al. 2017

J App Biol Biotech

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Klebsiella species known to exhibit important PGP traits like solubilization of phosphate, phytohormone production and good germination potential. In present study, based on the Phosphate solubilization and IAA production bacterial strain VRE36 was selected among the isolates collected from different sugarcane cultivar rhizosphere growing near Bardoli area for characterization and molecular identification through 16S rRNA gene sequence, which confirms the isolate as Klebsiella pneumoniae. The phosphate solubilization index of the isolate recorded was 3.9 and quantitative estimation reveals 17.4±1.78µg/ml release of phosphate in NBRIP broth. The high amount of IAA produced was 45.32±2.46µg/ml after 96 hour incubation at 37 °C. In seed germination assay with V radiate, C tetragonoloba and V unguiculata, treatments with bacteria were supported good plant height, dry weight and fresh weight when compared with controls. Maximum percentage of germination was recorded in V radiate (97.78%). The improved seedling parameters of the inoculated crop seeds indicated the potential of this isolate to be used in a bio-fertilizer formulation for sustainable production.

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Section: Phosphate Solubilization Activitycontrasting

confidence: 49%

Klebsiella pneumoniae VRE36 as a PGPR isolated from Saccharum officinarum cultivar Co99004

Bhardwaj¹,

Shah²,

Joshi³

et al. 2017

J App Biol Biotech

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“…The halo:colony ratios for bacteria in this study were much higher than 1.17-2.96 for phosphate-solubilizing fungi in our previous findings in asparagus root zone 21 . The colonies of the bacteria were however much smaller than those of fungi because bacteria had much slower growth than fungi, and the growth character would affect their ability to solubilize phosphate.…”

Section: Selection Of Phosphate-solubilizing Bacteriacontrasting

confidence: 79%

Identification of phosphate-solubilizing bacteria from the bamboo rhizosphere

Ruangsanka¹

2014

ScienceAsia

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Some bacteria in the root zone of plants can solubilize phosphate making it available to the plant. Bacteria associated with bamboo roots may be a good source for development of bio-fertilizer for organic crop production. Here, 24 soil samples were collected from 8 species of bamboo, and 19 isolates of bacteria with the ability to solubilize phosphate were primarily selected based on the halo-to-colony ratio in Pikovskaya's medium. Five isolates with the highest ratios were cultured in vitro in a liquid medium containing mono-calcium phosphate (Ca(H 2 PO 4 ) 2 ) and soluble phosphate was then determined. The five isolates were identified using the full 16S rDNA sequencing method. Buttiauxella izardii had the highest soluble phosphate (134 mg/l) followed by Enterobacter cancerogenus (110 mg/l), Burkholderia ubonensis (106 mg/l), and E. hormaechei (103 mg/l), whereas Burkholderia pyrrocinia was lowest (38 mg/l). The isolates were further inoculated to soil planted with baby corn (Zea mays) in a pot experiment under an open environment. The experiment was not able to confirm the ability of these bacteria isolates to promote growth of the crop. The potential use of the isolates and the methods to improve the experiments for further studies are discussed.

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“…The samples were incubated at room temperature for 20 min and their absorbance measured at 880 nm using the UV-Vis spectrophotometer. The amount of soluble phosphate was determined using a potassium dihydrogen phosphate standard [14].…”

Section: Phosphate Solubilizationmentioning

confidence: 99%

Antagonistic Activity against Dirty Panicle Rice Fungal Pathogens and Plant Growth-Promoting Activity of Bacillus amyloliquefaciens BAS23

Saechow¹,

Thammasittirong²,

Kittakoop³

et al. 2018

Journal of Microbiology and Biotechnology

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Bacterial strain BAS23 was isolated from rice field soil and identified as Bacillus amyloliquefaciens. Based on dual culture method results, the bacterium BAS23 exhibited potent in vitro inhibitory activity on mycelial growth against a broad range of dirty panicle fungal pathogens of rice (Curvularia lunata, Fusarium semitectum and Helminthosporium oryzae). Cellfree culture of BAS23 displayed a significant effect on germ tube elongation and mycelial growth. The highest dry weight reduction (%) values of C. lunata, H. oryzae and F. semitectum were 92.7%, 75.7%, and 68.9%, respectively. Analysis of electrospray ionization-mass spectrometry (ESI-MS) and 1 H nuclear magnetic resonance (NMR) spectroscopy revealed that the lipopeptides were iturin A with a C14 side chain (C14 iturinic acid), and a C15 side chain (C15 iturinic acid), which were produced by BAS23 when it was cultured in nutrient broth (NB) for 72 h at 30°C. BAS23, the efficient antagonistic bacterium, also possessed in vitro multiple traits for plant growth promotion and improved rice seedling growth. The results indicated that BAS23 represents a useful option either for biocontrol or as a plant growthpromoting agent.

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Identification of phosphate-solubilizing fungi from the asparagus rhizosphere as antagonists of the root and crown rot pathogen Fusarium oxysporum

Cited by 22 publications

References 7 publications

Klebsiella pneumoniae VRE36 as a PGPR isolated from Saccharum officinarum cultivar Co99004

Klebsiella pneumoniae VRE36 as a PGPR isolated from Saccharum officinarum cultivar Co99004

Identification of phosphate-solubilizing bacteria from the bamboo rhizosphere

Antagonistic Activity against Dirty Panicle Rice Fungal Pathogens and Plant Growth-Promoting Activity of Bacillus amyloliquefaciens BAS23

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