Phosphate solubilization and growth promotion by Pseudomonas fragi CS11RH1 (MTCC 8984), a psychrotolerant bacterium isolated from a high altitude Himalayan rhizosphere

Selvakumar, Govindan; Joshi, Piyush; Nazim, Sehar; Mishra, Pankaj Kumar; Bisht, Jaideep Kumar; Gupta, H. S.

doi:10.2478/s11756-009-0041-7

Cited by 106 publications

(31 citation statements)

References 48 publications

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“…In some reports, inoculation with bacteria has promoted seed germination and rate (Ashrafuzzaman et al, 2009;Selvakumar et al, 2009;Zarrin et al, 2009;Noumavo et al, 2013), while in some other reports it has been found to decrease seed germination (Banowetz et al, 2008;McPhail et al, 2010). For example, Selvakuma et al (2009) reported that P. fragi CS11RH1, an IAA-producing strain, significantly increased the germination percentage and rate, plant biomass and nutrient uptake of wheat seedlings.…”

Section: Discussionmentioning

confidence: 99%

“…For example, some of the bacteria in this group are known to be pathogenic (Hirano & Upper, 2000), while others are known to be involved in disease suppression (Halgren et al, 2011). In addition, some members of this group of bacteria appear to increase seed germination (Selvakumar et al, 2009), while others exert inhibitory effects on seed germination (McPhail et al, 2010;Lee et al, 2013). Germination arrest factors (GAFs) have been the subject of increased research in recent years.…”

Section: Bacteria Strains and Growth Conditionsmentioning

confidence: 99%

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Indole-3-acetic acid (IAA) producing Pseudomonas isolates inhibit seed germination and α-amylase activity in durum wheat (Triticum turgidum L.)

Tabatabaei

Ehsanzadeh

Etesami

et al. 2016

Span. j. agric. res.

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The role of plant-associated bacteria in plant physiology and metabolism is well documented, but little has been known about the roles played by Pseudomonas in durum wheat (Triticum turgidum L. var durum) growth and development. An in vitroexperiment was conducted to observe the effect of the inoculation of four indole-3-acetic acid (IAA)-producing Pseudomonas isolates and exogenous IAA on seed germination traits and α-amylase activity of durum wheat. The results showed inoculation with all bacterial isolates led to a decrease in the germination percent, although the extent of the depression varied with the isolate. A significant relationship between concentrations of bacterial IAA and the germination inhibition percent in durum wheat seeds by different bacteria strains was observed. The results of this assay showed the effect of bacterial isolates on α-amylase activity after six and 8 days of inoculation was significant, while effect of these isolates on α-amylase activity after two and 4 days of inoculation was not meaningful. In addition, the exogenously applied IAA displayed a concentration-dependent effect on seed germination attributes and α-amylase activity, consistent with the possibility that the inhibitory effect of bacterial inoculation on seed germination was in consequence of bacteria-produced IAA. Therefore, it may suggested that the inhibitory role of IAA in seed germination and α-amylase activity should be taken into account during the screening of IAA-producing Pseudomonas isolates for durum wheat growth promoting agents.

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Section: Discussionmentioning

confidence: 99%

Section: Bacteria Strains and Growth Conditionsmentioning

confidence: 99%

Indole-3-acetic acid (IAA) producing Pseudomonas isolates inhibit seed germination and α-amylase activity in durum wheat (Triticum turgidum L.)

Tabatabaei

Ehsanzadeh

Etesami

et al. 2016

Span. j. agric. res.

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“…The beneficial effects of plant growth promoting rhizobacteria, particularly those belonging to the genus Bacillus or Pseudomonas, in enhancing growth and overall plant establishment is well Several species of Pseudomonas that produce secondary metabolites, mobilize nutrients, and promote plant growth have been reported from Indian Himalayan region (Kumar et al, 2005;Pandey et al, 2006;Trivedi et al, 2005, Selvakumar et al 2009). …”

Section: Discussionmentioning

confidence: 99%

Isolation, molecular characterization and growth-promotion activities of a cold tolerant bacterium Pseudomonas sp. NARs9 (MTCC9002) from the Indian Himalayas

Mishra

Bisht

et al. 2009

Biol. Res.

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A bacterium that grows and expresses plant growth promotion traits at 4ºC was isolated from the rhizospheric soil of Amaranth, cultivated at a high altitude location in the North Western Indian Himalayas. The isolate was Gram negative and the cells appeared as rods (2.91 x 0.71 μm in size). It grew at temperatures ranging from 4 to 30ºC, with a growth optimum at 28ºC. It exhibited tolerance to a wide pH range (5-10; optimum 8.0) and salt concentrations up to 6% (wt/vol). Although it was sensitive to Rifampicin (R 20 μg ml -1 ), Gentamicin (G 3 μg ml -1 ), and Streptomycin (S 5 μg ml -1 ), it showed resistance to higher concentrations of Ampicillin (A 500 μg ml -1 ), Penicillin (P 300 μg ml -1 ), Polymixin B sulphate (Pb 100 μg ml -1 ) and Chloramphenicol (C 200 μg ml -1 ). The 16S rRNA sequence analysis revealed maximum identity with Pseudomonas lurida. The bacterium produced Indole Acetic Acid (IAA) and solubilizes phosphate at 4, 15 and 28ºC. It also retained its ability to produce rhamnolipids and siderophores at 15ºC. Seed bacterization with the isolate enhanced the germination, shoot and root lengths of thirty-day-old wheat seedlings by 19.2, 30.0 & 22.9% respectively, as compared to the un-inoculated controls.

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“…The identification of bacteria based on their cultural, morphological and biochemical characteristics has been done by various researchers for different genera such as Azotobacter (Bhatia et al, 2009), Pseudomonas (Selvakumar et al, 2009), Bacillus (Jadhav et al, 2010), Rhizobium (Ghosh et al, 2008), Beijerinckia and Derxia (Lasker et al, 2010), Paeniacillus and Azospirillum (Azlin et al, 2005). Joshi and Bhatt (2011) characterized bacteria using biochemical characterization and identified isolates as Bacillus sp.…”

Section: Discussionmentioning

confidence: 99%

Molecular characterization of diazotrophic bacteria isolated from rhizosphere of wheat cropping system from central plain region of Punjab

Neemisha¹,

Vikal²

2014

Afr. J. Microbiol. Res.

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Soil is a hot spot for microbial diversity, however, the excessive use of agrochemicals have reduced natural microflora of soil. Soil samples were collected from central plain region of Punjab and georeferenced. Physicochemical properties of the soil samples ranged from 5.9-8.7 (pH), 0.13-0.51 dSm -1 electrical conductivity (EC), 0.26 -0.77% organic carbon (OC), 14 -119 ppm (ammonical N) and 28 -119 ppm (nitrate N). Variable diazotrophic population was obtained on eight different nitrogen free media. Diazotrophic count was found to be positively affected by OC; whereas, it was negatively affected by pH, EC, ammonical and nitrate nitrogen. A total of 169 diazotrophs were isolated and characterized using cultural, morphological and biochemical techniques and tentatively identified as diverse genera of Pseudomonas sp., Bacillus sp., Azotobacter sp., Rhizobium sp., Azospirillum sp., Beijerinckia sp. and Derxia sp. Using molecular techniques, sixty seven isolates were found to be positive for amplification of nif H. Based on unweighted pair group method with arithmetic mean (UPGMA) clustering, dendrogram was obtained and the representative cultures were identified as Xanthomonas sp., Beijerinckia indica, Flavobacterium johnsoniae, Pseudoxanthomonas suwonensis, Lysinibacillus sphaericus, Stenotrophomonas maltophilia and Pseudomonas aeruginosa.

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Phosphate solubilization and growth promotion by Pseudomonas fragi CS11RH1 (MTCC 8984), a psychrotolerant bacterium isolated from a high altitude Himalayan rhizosphere

Cited by 106 publications

References 48 publications

Indole-3-acetic acid (IAA) producing Pseudomonas isolates inhibit seed germination and α-amylase activity in durum wheat (Triticum turgidum L.)

Indole-3-acetic acid (IAA) producing Pseudomonas isolates inhibit seed germination and α-amylase activity in durum wheat (Triticum turgidum L.)

Isolation, molecular characterization and growth-promotion activities of a cold tolerant bacterium Pseudomonas sp. NARs9 (MTCC9002) from the Indian Himalayas

Molecular characterization of diazotrophic bacteria isolated from rhizosphere of wheat cropping system from central plain region of Punjab

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