Nutrient use efficiency and nutrient uptake promoting of rice by potassium solubilizing bacteria (KSB)

Khanghahi, Mohammad Yaghoubi; Pirdashti, Hemmatollah; Rahimian, H.; Nematzadeh, Ghorbanali; Sepanlou, Mehdi Ghajar

doi:10.1556/0806.46.2018.042

Cited by 23 publications

(14 citation statements)

References 27 publications

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“…Moreover, the consortium of our native PGPB, isolated from a durum wheat field, significantly improved some quenching parameters, especially PQ, as compared to the half and full doses of chemical fertilizer. Similar results reported that the inoculation of beneficial bacteria can induce systemic tolerance against salinity and drought stresses [38] and improve the efficiency of chemical fertilizer [36,37], which consequently resulted in reducing the amount of the chemical fertilizer consumption [39], upon some subsequent direct and indirect mechanisms such as bio-availability of soil nutrients [40,41], production of IAA [13], regulation of the expression of specific genes [42], and of carbohydrate metabolism [35], and synthesis of 1-aminocyclopropane-1-carboxylate (ACC) deaminase [43].…”

Section: Discussionsupporting

confidence: 65%

Changes in Photo-Protective Energy Dissipation of Photosystem II in Response to Beneficial Bacteria Consortium in Durum Wheat under Drought and Salinity Stresses

2020

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The present research aimed at evaluating the harmless dissipation of excess excitation energy by durum wheat (Triticum durum Desf.) leaves in response to the application of a bacterial consortium consisting of four plant growth-promoting bacteria (PGPB). Three pot experiments were carried out under non-stress, drought (at 40% field capacity), and salinity (150 mM NaCl) conditions. The results showed that drought and salinity affected photo-protective energy dissipation of photosystem II (PSII) increasing the rate of non-photochemical chlorophyll fluorescence quenching (NPQ (non-photochemical quenching) and qCN (complete non-photochemical quenching)), as well as decreasing the total quenching of chlorophyll fluorescence (qTQ), total quenching of variable chlorophyll fluorescence (qTV) and the ratio of the quantum yield of actual PSII photochemistry, in light-adapted state to the quantum yield of the constitutive non-regulatory NPQ (PQ rate). Our results also indicated that the PGPB inoculants can mitigate the adverse impacts of stresses on leaves, especially the saline one, in comparison with the non-fertilized (control) treatment, by increasing the fraction of light absorbed by the PSII antenna, PQ ratio, qTQ, and qTV. In the light of findings, our beneficial bacterial strains showed the potential in reducing reliance on traditional chemical fertilizers, in particular in saline soil, by improving the grain yield and regulating the amount of excitation energy.

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Section: Discussionsupporting

confidence: 65%

Changes in Photo-Protective Energy Dissipation of Photosystem II in Response to Beneficial Bacteria Consortium in Durum Wheat under Drought and Salinity Stresses

2020

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“…The PVK, Aleksandrov, and Tris-mineral mediums were used to estimate the effect of five pH values (6,7,8,9, and 10) on P-, K-, and Zn-solubilizing ability of selected isolates, respectively, as previously described.…”

Section: Effect Of Ph On Solubilizing Ability Of Pgpb Isolatesmentioning

confidence: 99%

Isolation of Bacteria with Potential Plant-Promoting Traits and Optimization of Their Growth Conditions

et al. 2020

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This research aimed at investigating the isolation and identification of bacterial strains with biological nitrogen-fixing capability and phosphate, potassium, and zinc solubilization activities from a durum wheat field under two different tillage practices including 10 years of conventional tillage (CT) and no-tillage (NT) practices. Attempts were also extended to estimate their relative abundances in the soil as well as to develop accurate mathematical models in determining the effect of different temperatures, NaCl concentrations and pH on the growth, and activity of selected isolates. Twelve effective bacterial strains, including Pseudomonas, Acinetobacter, and Comamonas genera, were identified with a great potential to solubilize the insoluble forms of phosphate (from 11.1 to 115.5 mg l−1 at pH 8), potassium (from 32.2 to 35.6 mg l−1 at pH 7), and zinc (from 1.11 to 389.90 mg l−1 at pH 9) as well as to fix N2 gas (from 19.9 to 25.2 mg l−1). To our knowledge, this is the first report of the ability of Comamonas testosteroni and Acinetobacter pittii to fix nitrogen and to solubilize insoluble potassium compound, respectively. Three families, Moraxellaceae, Pseudomonadaceae, and Comamonadaceae, showed a higher percentage of abundance in the NT samples as compared to the CT, but only significant difference was observed in the relative abundance of Pseudomonadaceae (P < 0.01). These strains could be definitively recommended as inoculants to promote plant growth in the wide ranges of pH, salinity levels (with maximum growth and complete inhibition of growth from 0.67–0.92% to 3.5–9.3% NaCl, respectively), and temperatures (2.1–45.1 °C).

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“…Several works have isolated plant-associated KBS and characterized their ability to solubilize K-bearing minerals in vitro. Interestingly, these KSB are also reported with additional plant growth-promoting traits (i.e., N-fixation, P solubilization, auxin production), resulting in plant growth and nutrition increase under greenhouse and field conditions (Sugumaran and Janarthanam, 2007;Sangeeth et al, 2012;Bakhshandeh et al, 2017;Xiao et al, 2017;Yaghoubi Khanghahi et al, 2018;Sun et al, 2020). Despite the plant beneficial effect of these bacteria, frequently their ability to increase the solubility of rock powder or minerals applied as fertilizers in soils remains uncharacterized.…”

Section: Weathering Bacteria and K Availabilitymentioning

confidence: 99%

“…Silicate rocks can be used not only as K sources but it could also supply additional plant nutrition needs as it contains minor amounts of other macro and micronutrients (Priyono and Gilkes, 2004;Van Straaten, 2006). The soil inoculation with KSB and PSB could increase the plant uptake and biomass content of diverse nutrients (Costa et al, 2015;Yaghoubi Khanghahi et al, 2018). The combination of different rocks or mineral resources with these weathering bacteria represent an important strategy to supply plants with multi-nutrient, especially using K-bearing rocks concomitant with RP fertilizers.…”

Section: Weathering Bacteria and The Availability Of Multi-nutrients mentioning

confidence: 99%

Use of Mineral Weathering Bacteria to Enhance Nutrient Availability in Crops: A Review

et al. 2020

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Rock powders are low-cost potential sources of most of the nutrients required by higher plants for growth and development. However, slow dissolution rates of minerals represent an obstacle to the widespread use of rock powders in agriculture. Rhizosphere processes and biological weathering may further enhance mineral dissolution since the interaction between minerals, plants, and bacteria results in the release of macro- and micronutrients into the soil solution. Plants are important agents in this process acting directly in the mineral dissolution or sustaining a wide diversity of weathering microorganisms in the root environment. Meanwhile, root microorganisms promote mineral dissolution by producing complexing ligands (siderophores and organic acids), affecting the pH (via organic or inorganic acid production), or performing redox reactions. Besides that, a wide variety of rhizosphere bacteria and fungi could also promote plant development directly, synergistically contributing to the weathering activity performed by plants. The inoculation of weathering bacteria in soil or plants, especially combined with the use of crushed rocks, can increase soil fertility and improve crop production. This approach is more sustainable than conventional fertilization practices, which may contribute to reducing climate change linked to agricultural activity. Besides, it could decrease the dependency of developing countries on imported fertilizers, thus improving local development.

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Nutrient use efficiency and nutrient uptake promoting of rice by potassium solubilizing bacteria (KSB)

Cited by 23 publications

References 27 publications

Changes in Photo-Protective Energy Dissipation of Photosystem II in Response to Beneficial Bacteria Consortium in Durum Wheat under Drought and Salinity Stresses

Changes in Photo-Protective Energy Dissipation of Photosystem II in Response to Beneficial Bacteria Consortium in Durum Wheat under Drought and Salinity Stresses

Isolation of Bacteria with Potential Plant-Promoting Traits and Optimization of Their Growth Conditions

Use of Mineral Weathering Bacteria to Enhance Nutrient Availability in Crops: A Review

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