Exopolysaccharide-Producing Plant Growth-Promoting Rhizobacteria Under Salinity Condition

Upadhyay, Sudhir K.; Singh, Jay Shankar; Singh, Devendra P.

doi:10.1016/s1002-0160(11)60120-3

Cited by 337 publications

(171 citation statements)

References 34 publications

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“…Nearly all the Acinetobacter species isolated from rhizosphere soil of the three wheat varieties in the present study were efficient phosphate and zinc solubilizers and produced iron chelating siderophores [45]. Phosphate solubilizing bacteria (PSB) belong largely to the genera pseudomonads, bacilli and rhizobia [46].…”

Section: Phosphate Solubilization and Mineralizationmentioning

confidence: 75%

The Role of Soil Beneficial Bacteria in Wheat Production: A Review

Çakmakçı¹,

Turan²,

Kıtır³

et al. 2017

Wheat Improvement, Management and Utilization

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Free-living plant growth-promoting rhizobacteria (PGPR) have favourable effect on plant growth, tolerance against stresses and are considered as a promising alternative to inorganic fertilizer for promoting plant growth, yield and quality. PGPR colonize at the plant root, increase germination rates, promote root growth, yield, leaf area, chlorophyll content, nitrogen content, protein content, tolerance to drought, shoot and root weight, and delayed leaf senescence. Several important bacterial characteristics, such as biological nitrogen fixation, solubilization of inorganic phosphate and mineralization of organic phosphate, nutrient uptake, 1-aminocydopropane-1-carboxylic acid (ACC) deaminase activity and production of siderophores and phytohormones, can be assessed as plant growth promotion traits. By efficient use, PGPR is expected to contribute to agronomic efficiency, chiefly by decreasing costs and environmental pollution, by eliminating harmful chemicals. This review discusses various bacteria acting as PGPR, their genetic diversity, screening strategies, working principles, applications for wheat and future aspects in terms of efficiency, mechanisms and the desirable properties. The elucidation of the diverse mechanisms will enable microorganisms developing agriculture further.

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Section: Phosphate Solubilization and Mineralizationmentioning

confidence: 75%

The Role of Soil Beneficial Bacteria in Wheat Production: A Review

Çakmakçı¹,

Turan²,

Kıtır³

et al. 2017

Wheat Improvement, Management and Utilization

View full text Add to dashboard Cite

show abstract

“…The coccoid Natronococcus occultus also has a thick cell wall that retains its shape in the absence of salt, but its structure differs greatly from that of the cell wall polymer of Halococcus, consisting of repeating units of a poly(L-glutamine) glycoconjugate (Niemetz et al 1997). Several rhizobacterial species excrete massive amounts of exopolysacchrides which help to mitigate salinity stress by unknown processes (Upadhyay et al 2011). The importance of extracellular polysaccharides (capsular and released polysaccharides) in reducing salt stress was demonstrated by Yoshimura et al (2012) in the cyanobacterium Nostoc sp., where the composition ratio of sugars in the extracellular polysaccharide hardly changed under NaCl stress in comparison to normal culture conditions.…”

Section: Cell Wall Constructionsmentioning

confidence: 99%

“…Exopolysaccharide-producing bacterial strains, including Aeromonas hydrophila/caviae and Bacillus sp., were isolated from roots of salt-adapted wheat plants and reinoculation restricted the Na + uptake by roots (Ashraf et al 2004). Similarly, exopolysaccharide-producing rhizobacteria isolated from salt-adapted wheat plants reduced the plants Na + availability and conferred salt tolerance upon inoculation in stress experiments (Upadhyay et al 2011). Although the application of mucilage-producing bacteria might be a promising tool in alleviating salt stress effects, many of the underlying mechanisms still remain unresolved.…”

Section: Production Of Exopolysaccharidesmentioning

confidence: 99%

Properties of the halophyte microbiome and their implications for plant salt tolerance

Ruppel

Franken

Witzel

2013

Functional Plant Biol.

141

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Abstract. Saline habitats cover a wide area of our planet and halophytes (plants growing naturally in saline soils) are increasingly used for human benefits. Beside their genetic and physiological adaptations to salt, complex ecological processes affect the salinity tolerance of halophytes. Hence, prokaryotes and fungi inhabiting roots and leaves can contribute significantly to plant performance. Members of the two prokaryotic domains Bacteria and Archaea, as well as of the fungal kingdom are known to be able to adapt to a range of changes in external osmolarity. Shifts in the microbial community composition with increasing soil salinity have been suggested and research in functional interactions between plants and micro-organisms contributing to salt stress tolerance is gaining interest. Among others, microbial biosynthesis of polymers, exopolysaccharides, phytohormones and phytohormones-degrading enzymes could be involved.

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“…at 32ºC on a rotary shaker at 180 rpm, and they were then centrifuged at 13,000 rpm for 30 min. for sedimentation, and finally the supernatant material was separated and the produced sediment was washed and re-deposited in the physiologic serum to obtain a density of 1×10 8 cells mL -1 [14]. Silicon nanoparticles with the size of 50 nm (purchased from the Department of Chemistry, Amir Kabir University, Tehran/Iran) were prepared at a concentration of 8 gr L -1 according to the procedure described by Siddiqui and Al-Whaibi [15].…”

Section: Treatment Preparationsmentioning

confidence: 99%

Influence of Exopolysaccharide-Producing Bacteria and SiO2 Nanoparticles on Proline Content and Antioxidant Enzyme Activities of Tomato Seedlings (Solanum lycopersicum L.) under Salinity Stress

Isfahani¹,

Tahmourespour²,

Hoodaji³

et al. 2018

Pol. J. Environ. Stud.

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A greenhouse experiment was conducted to evaluate the effects regarding inoculation of exopolysaccharide (EPS)-producing bacterium, the extracted EPS and silicon nanoparticles on Solanum lycopersicum L. seeds under salinity stress, in a completely randomized factorial design with three replicates. The inoculated seeds with silicon nanoparticles (8 gr L -1 ), bacterial EPS (0.01 M), and 1 mL of bacterial suspension (1×10 8 CFU mL -1 ) were sown in pots and irrigated with water at different salinity levels (0.3, 2, 4, 6, and 8 dS m -1 ). Results showed that treatment application could enhance salinity tolerance of tomato seeds and improve plant growth so that combined treatments of EPS and silicon nanoparticles (S.E.N), bacteria and silicon nanoparticles (S.B.N), and EPS with silicon nanoparticles and bacteria (S.E.B.N) were the best treatments for plant growth and improvement regarding salinity levels. The mentioned treatments significantly (p<0.01) increased root and shoot fresh or dry weight in comparison to the control sample. In addition, treatments significantly (p<0.01) decreased proline content and antioxidant enzyme activities. Thus, it can be concluded that applied treatments are suitable for agricultural and environmental applications and bring about less damage caused by salinity stress.

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Exopolysaccharide-Producing Plant Growth-Promoting Rhizobacteria Under Salinity Condition

Cited by 337 publications

References 34 publications

The Role of Soil Beneficial Bacteria in Wheat Production: A Review

The Role of Soil Beneficial Bacteria in Wheat Production: A Review

Properties of the halophyte microbiome and their implications for plant salt tolerance

Influence of Exopolysaccharide-Producing Bacteria and SiO2 Nanoparticles on Proline Content and Antioxidant Enzyme Activities of Tomato Seedlings (Solanum lycopersicum L.) under Salinity Stress

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