Potential plant growth promoting traits and bioacidulation of rock phosphate by thiosulfate oxidizing bacteria isolated from crop plants

Anandham, Rangasamy; Gandhi, Pandiyan Indira; Madhaiyan, Munusamy; Sa, Tongmin

doi:10.1002/jobm.200700380

Cited by 47 publications

(26 citation statements)

References 36 publications

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“…Their biochemical characteristics are summarized in Table S1, using M. extorquens strain AM1 for comparison. Some of the strains were able to produce indoleacetic acid [29], [30], siderophore [31], ACC deaminase [32] and hydrogen cyanate [10]. Solubilization of calcium phosphate was also confirmed [33], [34].…”

Section: Resultsmentioning

confidence: 86%

Practical Application of Methanol-Mediated Mutualistic Symbiosis between Methylobacterium Species and a Roof Greening Moss, Racomitrium japonicum

Tani

Takai

Suzukawa³

et al. 2012

PLoS ONE

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Bryophytes, or mosses, are considered the most maintenance-free materials for roof greening. Racomitrium species are most often used due to their high tolerance to desiccation. Because they grow slowly, a technology for forcing their growth is desired. We succeeded in the efficient production of R. japonicum in liquid culture. The structure of the microbial community is crucial to stabilize the culture. A culture-independent technique revealed that the cultures contain methylotrophic bacteria. Using yeast cells that fluoresce in the presence of methanol, methanol emission from the moss was confirmed, suggesting that it is an important carbon and energy source for the bacteria. We isolated Methylobacterium species from the liquid culture and studied their characteristics. The isolates were able to strongly promote the growth of some mosses including R. japonicum and seed plants, but the plant-microbe combination was important, since growth promotion was not uniform across species. One of the isolates, strain 22A, was cultivated with R. japonicum in liquid culture and in a field experiment, resulting in strong growth promotion. Mutualistic symbiosis can thus be utilized for industrial moss production.

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Section: Resultsmentioning

confidence: 86%

Practical Application of Methanol-Mediated Mutualistic Symbiosis between Methylobacterium Species and a Roof Greening Moss, Racomitrium japonicum

Tani

Takai

Suzukawa³

et al. 2012

PLoS ONE

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“…The beneficial effects of PGPR are attributed to several mechanisms, such as enhanced efficiency of the plant's nutrient uptake [47], hormone production [48], or, indirectly, to defense against pathogens [49]. However, the molecular events underlying plant growth promotion by PGPR are still poorly understood.…”

Section: Discussionmentioning

confidence: 99%

A Naturally Associated Rhizobacterium of Arabidopsis thaliana Induces a Starvation-Like Transcriptional Response while Promoting Growth

et al. 2011

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Plant growth promotion by rhizobacteria is a known phenomenon but the underlying mechanisms are poorly understood. We searched for plant growth-promoting rhizobacteria that are naturally associated with Arabidopsis thaliana to investigate the molecular mechanisms that are involved in plant growth-promotion. We isolated a Pseudomonas bacterium (Pseudomonas sp. G62) from roots of field-grown Arabidopsis plants that has not been described previously and analyzed its effect on plant growth, gene expression and the level of sugars and amino acids in the host plant. Inoculation with Pseudomonas sp. G62 promoted plant growth under various growth conditions. Microarray analysis revealed rapid changes in transcript levels of genes annotated to energy-, sugar- and cell wall metabolism in plants 6 h after root inoculation with P. sp. G62. The expression of several of these genes remained stable over weeks, but appeared differentially regulated in roots and shoots. The global gene expression profile observed after inoculation with P. sp. G62 showed a striking resemblance with previously described carbohydrate starvation experiments, although plants were not depleted from soluble sugars, and even showed a slight increase of the sucrose level in roots 5 weeks after inoculation. We suggest that the starvation-like transcriptional phenotype - while steady state sucrose levels are not reduced - is induced by a yet unknown signal from the bacterium that simulates sugar starvation. We discuss the potential effects of the sugar starvation signal on plant growth promotion.

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“…Two drops of orthophosphoric acid and 4 ml of the Salkowski reagent were then added to the supernatant. The mixture was incubated at room temperature for 25 min and the development of pink color indicates IAA production (Anandham et al 2008). Siderophore production was detected by using the blue agar chrome azurol S (CAS) assay (Louden et al 2011).…”

Section: Qualitative Analysis Of Plant Growth Promoting Traitsmentioning

confidence: 99%

Effect of GFP-tagging on nitrogen fixation and plant growth promotion of an endophytic diazotrophic strain ofPaenibacillus polymyxa

Padda¹,

Puri²,

Zeng³

et al. 2017

Botany

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Green fluorescent protein (GFP), a renowned marker protein, is typically believed to be inert in affecting the physiology of host bacteria. We analyzed the effects of GFP-tagging on the ability of an endophytic diazotroph, Paenibacillus polymyxa P2b-2R, to fix nitrogen and promote overall growth of corn plants. The growth response and the amount of nitrogen fixed by P2b-2Rgfp-inoculated plants were compared with uninoculated controls and P2b-2R-inoculated plants at three harvests. P2b-2Rgfp inoculation significantly increased the biomass of corn plants as compared to non-inoculated controls and P2b-2R-treated plants. In vitro tests revealed that strains P2b-2R and P2b-2Rgfp possess various plant-growth-promoting characteristics, namely phosphate solubilization, production of siderophores, IAA, ammonia, and enzymes like cellulase, protease, and catalase. P2b-2Rgfp-inoculated plants fixed 18% atmospheric nitrogen, significantly higher than P2b-2R-inoculated plants (15%). This difference led us to compare the expression of structural nif genes (nifH, nifD, nifK) of strains P2b-2R and P2b-2Rgfp. It was observed that expression levels of structural nif genes of strain P2b-2Rgfp were 1.5-fold higher than those of strain P2b-2R. These results indicate that GFP-tagging positively affects the efficacy of strain P2b-2R to promote plant growth and fix nitrogen, perhaps by increasing the expression levels of structural nif genes.

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Potential plant growth promoting traits and bioacidulation of rock phosphate by thiosulfate oxidizing bacteria isolated from crop plants

Cited by 47 publications

References 36 publications

Practical Application of Methanol-Mediated Mutualistic Symbiosis between Methylobacterium Species and a Roof Greening Moss, Racomitrium japonicum

Practical Application of Methanol-Mediated Mutualistic Symbiosis between Methylobacterium Species and a Roof Greening Moss, Racomitrium japonicum

A Naturally Associated Rhizobacterium of Arabidopsis thaliana Induces a Starvation-Like Transcriptional Response while Promoting Growth

Effect of GFP-tagging on nitrogen fixation and plant growth promotion of an endophytic diazotrophic strain ofPaenibacillus polymyxa

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