Phosphate-Solubilizing and Auxin-Producing Rhizobacteria Promote Plant Growth Under Saline Conditions

Kadmiri, Issam Meftah; Chaouqui, Lamiaa; Azaroual, Salah Eddine; Sijilmassi, Badreddine; Yaakoubi, Kaoutar; Wahby, Imane

doi:10.1007/s13369-017-3042-9

Cited by 64 publications

(23 citation statements)

References 40 publications

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“…PSB have been successfully used as inoculation agents to eliminate salt stress in different crops, such as Tagetes minuta , tomato, wheat, etc. (Egamberdieva, Davranov, & Wirth, ; Kadmiri et al, ; Sahay & Patra, ). However, there are no reports on its function for peanut crops under salt stress.…”

Section: Introductionsupporting

confidence: 93%

“…Previously, the effectiveness of PSB for inducing salt tolerance and consequently increasing growth and yield for little marigold, tomato and wheat was demonstrated by Egamberdieva et al (), Kadmiri et al () and Sahay and Patra (). However, there is no report about the contribution of PSB strains to the growth of peanut crops under salt stress, and it must be taken into account that plants are often more sensitive to salinity during germination and seedling growth stages.…”

Section: Discussionsupporting

confidence: 77%

See 1 more Smart Citation

Role of halotolerant phosphate‐solubilising bacteria on growth promotion of peanut (Arachis hypogaea) under saline soil

Jiang

Wang³

et al. 2018

Annals of Applied Biology

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Soil salinity is a major abiotic stress that limits plant growth, and inoculating plant growthpromoting rhizobacteria is a well-known strategy to reduce stressors under adverse soil conditions. This study was conducted to assess the effect of halotolerant phosphate-solubilising bacteria (PSB) on protecting peanut against salt stress. Four candidate strains: Bacillus megaterium (YM13), Enterobacter sp. (YM14), Providencia rettgeri (TPM23) and Ensifer adhaeren (TPMX5) showed strong tolerance to NaCl and high phosphate-solubilising ability even at a NaCl concentration of 1.4 M. In addition, all four strains demonstrated variable levels of phosphate solubilisation activity in the presence of various carbon and nitrogen sources, indicating high phosphate-solubilising efficacy. Germination and radicle length of peanut seedlings increased with inoculation of PSB under both control and saline conditions. Statistically significant increase in the root length (range: 25.71-49%), stem length (19-48%), number of leaves (12.5-37%) and root/shoot biomass were observed. This could be attributed to plant hormones (i.e., indole acetic acid [IAA], abscisic acid [ABA] and gibberellic acid [GA3]) and successful root colonisation by bacterial inoculants. Root colonisation was positively correlated to plant growthand shown to be influenced by soil conditions. In addition, the PSB also improved the levels of available P in soil. The most pronounced beneficial effect on the growth of peanut plants and soil available P content was observed in the inoculation of the PSB isolates with Ca 3 (PO 4 ) 2 addition. This is the first report that describes Providencia rettgeri as a plant growth-promoting bacterium that may be utilised to alleviate the negative effects of salt stress on peanut plants. This bacterial species may thus be potentially used as a biofertilizer for sustaining the growth of peanut in salt-stressed soil and in mitigating soil stress conditions.

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Section: Introductionsupporting

confidence: 93%

Section: Discussionsupporting

confidence: 77%

Role of halotolerant phosphate‐solubilising bacteria on growth promotion of peanut (Arachis hypogaea) under saline soil

Jiang

Wang³

et al. 2018

Annals of Applied Biology

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“…PGPR induced P solubilization to make available P is another mechanism of PGPR to alleviate salt stress (Sharma 2013a;Chen et al, 2014;Paul & Sinha, 2017). Many authors have reported that PGPR also secrete phosphate enzyme which solubilize inorganic phosphate which is easily taken up by plant roots and elicit a strong growth promoting effect on plants grown under saline condition (Sharma, 2013b;Kadmiri et al, 2018).…”

Section: Discussionmentioning

confidence: 99%

Role of PGPR in the reclamation and revegetation of saline land

Ullah¹,

Bano²

2018

PAK.J.BOT.

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A field experiment was conducted to investigate the effect of PGPR inoculation on growth and yield of maize as well as on reclamation of saline sodic soil of Soil Salinity Research Institute Pindi Bhattian Pakistan, during 2015-16. Seed of maize genotype "Islamabad Gold" were soaked (2-3 h) prior to sowing in the broth culture of 4 bacterial strains i.e. Pseudomonas putida (accession no. KX580766), Pseudomonas fluorescens (accession no. KX644132), Exiguobacterium aurantiacum (accession no. KX580769), Bacillus pumilus (accession no. KX580768) and Lysinibacillus sphaericus (accession no. KX580767). In vitro analysis of bacteria confirmed that they metabolize ACC deaminase, solubilize insoluble phosphate and produce significant quantity of auxin in the presence of L-tryptophan. Inoculation of maize with bacteria along with application of 1L inocula / treatment in the field gave a significant (P = 0.05) increase in germination (76%), leaf chlorophyll (24%), proline (65%), anthocyanin (38%) and soluble sugar content (56%). P. putida inoculation resulted in maximum increase in plant height, leaf area, no of grains cob -1 (459.8), 1000 grain weight (330.9 g) and grain yield (3.25 tha -1 ). P. fluorescens was least effective. The rhizosphere soil analysed after harvesting exhibited significant decrease in electrical conductivity (49%), sodium absorption ratio (98%), and cation exchange capacity (94%) concomitant with a significant increase in organic matter (52%), NO3-N (37%), available P (48%) and K (31%). The highest efficiency of P. putida may be attributed to the maximum ACC deaminase activity, higher production of indole acetic acid and greater potential for Phosphate solubilization. The favorable effects of PGPR were more pronounced in the successive year 2016.

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“…solubilizing and IAA producing rhizobacteria increase plant adaptability under salinity stress. The work of Kadmiri (2018), who introduced Pseudomonas fluorescens Ms-01 and Azosprillum brasilense DSM1690, succeed to enhance wheat productivity in saline soil. Those microbes were able to solubilize Ca-P even at the solution with salinity 600 mM NaCl.…”

Section: Phosphatementioning

confidence: 99%

“…Those microbes were able to solubilize Ca-P even at the solution with salinity 600 mM NaCl. The mechanism by which microbes can enhance plant salt tolerance is well understood, one mechanism possible through increased proline accumulation and antioxidant enzymes activities improved enhance and hence lead to better plant defense pathway against salt stress (Kadmiri et al 2018). The ability of S. sasae TG01 to inhibit growth F. solani and F. oxysporum solubilize phosphate under saline condition enrich the diversity of microbes for enhancing the growth of plant under abiotic stress.…”

Section: Phosphatementioning

confidence: 99%

Growth inhibition of Fusarium solani and F. oxysporum by Streptomyces sasae TG01, and its ability to solubilize insoluble phosphate

et al. 2020

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Abstract. Sudiana A, Putri A, Napitupulu TP, Purnaningsih I, Idris, Kanti A. 2020. Growth inhibition of Fusarium solani and F. oxysporum by Streptomyces sasae TG01, and its ability to solubilize insoluble phosphate. Biodiversitas 21: 429-435. Actinomycetes have been widely explored for new antibiotic production, but not many studies explore its abilities to inhibit the growth of phytopathogenic fungi and solubilize insoluble phosphate hence stimulate the growth of plants. We isolated Actinomycetes from the soil. Based on morphology, physiology, and 16S rDNA analyses, the isolate is closely related to Streptomyces sasae. The strain was able to inhibit the growth of phytopathogenic fungi Fusarium solani, and Fusarium oxysporum. S. sasae produced secondary metabolites 2-methyl-1,3-dioxolane as the major constituent. The strain assimilated variable carbon sources include L-arabinose, D-fructose, D-glucose, D-mannitol, Lactose, raffinose, L-rhamnose, and sucrose. The strain grew at pH 6.0 to 8.0, and at salinity (1-3%). Their growth was affected by the salinity level. The strain solubilized Ca-P at 1-3% salinity, but their ability to solubilize phosphate was influenced by salinity. The strain was also able to solubilize rock phosphate. Their ability to solubilize less soluble phosphate and inhibit the growth of F. solani and F. oxysporum may imply that this strain is potential for biocontrol agents. The 16S rRNA gene was submitted to DDBJ with the entry number 5df623c1a3c8820021322a36.TG01, and the accession number is LC514451.

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Phosphate-Solubilizing and Auxin-Producing Rhizobacteria Promote Plant Growth Under Saline Conditions

Cited by 64 publications

References 40 publications

Role of halotolerant phosphate‐solubilising bacteria on growth promotion of peanut (Arachis hypogaea) under saline soil

Role of halotolerant phosphate‐solubilising bacteria on growth promotion of peanut (Arachis hypogaea) under saline soil

Role of PGPR in the reclamation and revegetation of saline land

Growth inhibition of Fusarium solani and F. oxysporum by Streptomyces sasae TG01, and its ability to solubilize insoluble phosphate

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