Salt-tolerant rhizobacteria-mediated induced tolerance in wheat (Triticum aestivum) and chemical diversity in rhizosphere enhance plant growth

Tiwari, Sharad Kumar; Singh, Pratibha; Tiwari, Rameshwar; Meena, Kamlesh K.; Yandigeri, Mahesh S.; Singh, Dhananjaya P.; Arora, Dilip K.

doi:10.1007/s00374-011-0598-5

Cited by 200 publications

(79 citation statements)

References 53 publications

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“…Rodrigues et al (2014) The absence of increments in the yield promoted by inoculation can be explained by the interference of the cultivation site (Sala et al, 2007). According to Tiwari et al (2011), PGPB induce physical and biochemical changes in the plants, conferring resistance under stress conditions. However, the supplementation of irrigation used along the experiment may have minimized possible effects of water stress, favoring the treatment without inoculation to the point of becoming equal to the inoculated treatment, not demonstrating difference in most analyzed variables.…”

Section: Resultsmentioning

confidence: 99%

Irrigated wheat subjected to inoculation with Azospirillum brasilense and nitrogen doses as top-dressing

Alves

Arf

Ramos

et al. 2017

Rev. bras. eng. agríc. ambient.

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A B S T R A C TThe use of Azospirillum brasilense in the wheat crop still presents contradictory results; thus, it is necessary to identify ideal conditions to obtain satisfactory results. The objective of this study was to investigate the interaction between Azospirillum brasilense and nitrogen doses in a wheat cultivar, conducted with irrigation in the Cerrado region of Mato Grosso do Sul. The experimental design was randomized blocks with a 4 x 2 factorial scheme, four nitrogen doses (0, 40, 80 and 120 kg ha -1 ) applied as top-dressing, associated or not with inoculation of wheat seeds with Azospirillum brasilense. The results show that there was no interaction between N and inoculation. The isolated effect of Azospirillum brasilense promotes an increase in plant height and number of grains per spike. Nitrogen doses promotes significant increases in leaf N content, plant height, number of grains per spike, number of spikes per square meter and grain yield. The conditions under which the experiment was conducted favored the development of the crop, not interfering with grain yield due the inoculation with Azospirillum brasilense. Trigo irrigado submetido à inoculação comAzospirillum brasilense e doses de nitrogênio em cobertura R E S U M O A utilização de Azospirillum brasilense na cultura do trigo ainda apresenta resultados contraditórios, sendo necessário identificar as condições ideais para se obter resultados satisfatórios. Objetivou-se, com o trabalho, investigar a interação entre Azospirillum brasilense e doses de nitrogênio em trigo na região de Cerrado Sul-Mato-Grossense. Adotou-se um delineamento em blocos casualizados com esquema fatorial 4 x 2, sendo quatro doses de nitrogênio (0, 40, 80 e 120 kg ha -1 ) aplicadas em cobertura, associadas à inoculação ou não de sementes de trigo com Azospirillum brasilense. Os resultados mostram que não houve interação entre as doses de N e a inoculação. O efeito isolado do Azospirillum brasilense proporcionou aumento na altura de plantas e número de grãos por espiga. As doses de nitrogênio promoveram incrementos significativos no teor de N foliar, altura de plantas, número de grãos por espiga, número de espigas por metro quadrado e produtividade de grãos. As condições em que o experimento foi conduzido favoreceram o desenvolvimento da cultura, não interferindo na produtividade de grãos em função da inoculação com Azospirillum brasilense. Key words:Triticum aestivum L. nitrogen fertilization plant growth-promoting bacteria Cerrado Palavras-chave:Triticum aestivum L. adubação nitrogenada bactérias promotoras do crescimento de plantas Cerrado

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Section: Resultsmentioning

confidence: 99%

Irrigated wheat subjected to inoculation with Azospirillum brasilense and nitrogen doses as top-dressing

Alves

Arf

Ramos

et al. 2017

Rev. bras. eng. agríc. ambient.

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“…For instance, halotolerant bacteria from saline habitats stimulated plant growth by mitigating osmotic stress [9,39]. Similarly, salt-tolerant rhizobacteria exhibiting multiple plant-growth-promoting traits stimulated the growth of wheat in salt-affected soils [40]. In another study, strains of Bacillus facilitated the growth of maize under water-stress conditions [41].…”

Section: Discussionmentioning

confidence: 99%

Halotolerant Bacterial Diversity Associated with Suaeda fruticosa (L.) Forssk. Improved Growth of Maize under Salinity Stress

Aslam

Ali

2018

Agronomy

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Abstract:Halotolerant bacterial strains associated with the rhizosphere and phytoplane of Suaeda fruticosa (L.) Forssk. growing in saline habitats were isolated to mitigate the salinity stress of Zea mays L. 16S rRNA gene sequencing confirmed the presence of strains that belong to Gracilibacillus, Staphylococcus, Virgibacillus, Salinicoccus, Bacillus, Zhihengliuella, Brevibacterium, Oceanobacillus, Exiguobacterium, Pseudomonas, Arthrobacter, and Halomonas genera. Strains were screened for auxin production, 1-aminocyclopropane-1-carboxylate (ACC)-deaminase, and biofilm formation. Bacterial auxin production ranged from 14 to 215 µg mL −1 . Moreover, several bacterial isolates were also recorded as positive for ACC-deaminase activity, phosphate solubilization, and biofilm formation. In pot trials, bacterial strains significantly mitigated the salinity stress of Z. mays seedlings. For instance, at 200 and 400 mM NaCl, a significant increase of shoot and root length (up to onefold) was recorded for Staphylococcus jettensis F-11. At 200 mM, Zhihengliuella flava F-9 (45%) and Bacillus megaterium F-58 (42%) exhibited significant improvements for fresh weight. For dry weight, S. jettensis F-11 and S. arlettae F-71 recorded up to a threefold increase at 200 mM over the respective control. The results of this study suggest that natural plant settings of saline habitats are a good source for the isolation of beneficial salt-tolerant bacteria to grow crops under saline conditions.

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“…Raheem and Ali isolated rhizobacteria that were producing beneficial plant growth-promoting metabolites such as IAA and ACC-deaminase activity [138]. The isolation of indigenous microorganisms from the stress-affected soils and screening on the basis of their stress tolerance and PGP traits may be useful in the rapid selection of efficient strains that could be used as bio-inoculants for stressed crops [139,140]. For several durum cultivars, PGPR efficacy in mitigating salt stress in tetraploid wheat is salt level and bacterial strainspecific [128,141,142].…”

Section: Salinitymentioning

confidence: 99%

“…Trials with rhizosphere-associated plant growth-promoting N 2 -fixing and P-solubilising Bacillus and other species indicated yield increases in many crops such as wheat [43,51,170,171]. In wheat, several rhizobacteria have been reported as improving grain yield, grain protein concentration or both [3,135,140,164,172].…”

Section: Improve Yield and Quality Of Wheatmentioning

confidence: 99%

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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Salt-tolerant rhizobacteria-mediated induced tolerance in wheat (Triticum aestivum) and chemical diversity in rhizosphere enhance plant growth

Cited by 200 publications

References 53 publications

Irrigated wheat subjected to inoculation with Azospirillum brasilense and nitrogen doses as top-dressing

Irrigated wheat subjected to inoculation with Azospirillum brasilense and nitrogen doses as top-dressing

Halotolerant Bacterial Diversity Associated with Suaeda fruticosa (L.) Forssk. Improved Growth of Maize under Salinity Stress

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

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