Synergistic effects of plant growth promoting rhizobacteria and silicon dioxide nano-particles for amelioration of drought stress in wheat

Akhtar, Nosheen; Ilyas, Noshin; Mashwani, Zia‐ur‐Rehman; Hayat, Rifat; Yasmin, Humaira; Noureldeen, Ahmed; Ahmad, Parvaiz

doi:10.1016/j.plaphy.2021.05.039

Cited by 129 publications

(81 citation statements)

References 97 publications

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“…The authors demonstrated that under both the soluble and insoluble P fertilization conditions, Si treatment or PGPR inoculation increased the antioxidant activities and the effects were more obvious in plants simultaneously treated with Si and inoculated with PGPR. The same has been reported in Z. mays under salt stress (Kubi et al, 2021), in T. aestivum under drought (Akhtar et al, 2021), and in C. sativum under heavy metals (Fatemi et al, 2020).…”

Section: Discussionsupporting

confidence: 83%

“…However, this was alleviated by Si supplementation (Zhang et al, 2019) or PSB inoculation (Farssi et al, 2021). Moreover, under salt, drought, or heavy metals stress, investigations indicated that the effects of Si supplementation and bacterial inoculation on Chl content were more obvious when both the treatments were applied together as compared to their single application (Fatemi et al, 2020;Akhtar et al, 2021;Kubi et al, 2021). Additionally, the increased total Chl content under P deficiency in response to Si treatment and PF9 strain inoculation might be the reason of increased plant growth, since the positive correlation observed between total Chl and plant growth parameters.…”

Section: Discussionmentioning

confidence: 99%

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Silicon- and Phosphate-Solubilizing Pseudomonas alkylphenolica PF9 Alleviate Low Phosphorus Availability Stress in Alfalfa (Medicago sativa L.)

et al. 2022

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Low phosphorus (P) availability is a major limiting factor facing current agriculture in several agricultural areas. Many P fertilizers are applied to enhance P availability; however, the major part is likely to lose due to various processes related to P cycle. Silicon (Si) treatment and P-solubilizing bacteria inoculation have been emerged as a promising way to improve plant P nutrition. This study aimed to investigate the synergistic effects of Si treatment and Pseudomonas alkylphenolica PF9 strain inoculation on plant growth, P nutrition, acid phosphatase (APase) activity, oxidative stress markers, and antioxidant metabolism in the Moroccan alfalfa population Oued Lmalah (OL) under low P availability. Results revealed a significant reduction in dry biomass, plant height, leaf number, and area under low P conditions. P deficiency also altered P nutrition and chlorophyll (Chl) content. However, P-deficient alfalfa plants treated with Si or inoculated with PF9 strain displayed higher plant growth, Chl content, and remarkably the effect was much higher when Si was applied together with PF9 strain. Moreover, the simultaneous application of Si and PF9 strain to the P-deficient alfalfa plants improved APase activity and as a result, P contents in both the shoots and roots. Results also showed that the application of both the Si and PF9 counteracted the low P availability stress-induced oxidative damage by lowering the accumulation of reactive oxygen species (ROS), electrolyte leakage, and lipid peroxidation. This seems to be related to the ability of both the Si and PF9 strain to modulate both the enzymatic and non-enzymatic antioxidant molecules including superoxide dismutase activity, total polyphenols, flavonoids, and proline contents. Our findings suggest that the combined application of Si and P. alkylphenolica PF9 strain could be a promising way for improving growth of alfalfa under low-P availability.

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Section: Discussionsupporting

confidence: 83%

Section: Discussionmentioning

confidence: 99%

Silicon- and Phosphate-Solubilizing Pseudomonas alkylphenolica PF9 Alleviate Low Phosphorus Availability Stress in Alfalfa (Medicago sativa L.)

et al. 2022

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“…Bacterial strains used in this experiment (include Azospirillum brasilense, Bacillus sp., and Azospirillum lipoferum) and SiO 2 NPs as reported in (Akhtar et al 2021). The consortium of bacterial strains (1.13 10 − 8 CFU/mL) were prepared by mixing the equal volume of broth culture grown in incubator shaker at 28°C.…”

Section: Synthesis Of Nanosilicabmentioning

confidence: 99%

Role of nanosilicab to boost the activities of metabolites in Triticum aestivum facing drought stress

Akhtar

Ilyas

2022

Plant Soil

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Drought stress is a threat to agriculture which is decreasing the yield of crops and creating a considerable loss. This research focused on the part played by silicon dioxide nanoparticles (SiO 2 NPs), biofertilizers, and nanosilicab on Triticum aestivum under control and drought stress. Nanosilicab enhanced the germination percentage, germination index, and germination vigor index by 23.07%, 14.49% and, 93.10% under control and 14.42%, 10.52%, and 46.15% under drought. In the pot experiment, the soil was treated with 150 mg/kg SiO 2 NPs, 1% biofertilizer and, 1% nanosilicab before sowing. Nanosilicab increased shoot length and root length by 9.39%, 10.76%, 22.41%, 18.76%, 30.58%, and, 21.56% under control and drought stress conditions. It also increased photosynthetic pigments, osmolytes content, relative water content, membrane stability index, phenol, and avonoid content. The increase in antioxidant activity was signi cantly high by the application of nanosilicab i.e. the augmentation in catalase, peroxidase, and superoxide dismutase was 68.65%, 83.69% and, 85.99% respectively. It also increased the indole acetic acid and cytokinin to 22.28% and 14.79% in comparison to control. The improvement in hundred grain weight and grains per spike by the use of nanosilicab was 36.25%, 38.76%, 27.47%, and 22.59% as compared to control. The positive interaction of nanosilicab with the roots of plants in the rhizosphere improved the growth of plants signi cantly and a potential candidate for application on crops. The novelty of this study lies in the formulation of nanosilicab and its role in drought amelioration.

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“…Bacillus sp. Azospirillum lipoferum and Azospirillum brasilense PGPR improved the drought tolerance of wheat by improving relative water content, gas exchange attributes, increased nutrient uptake, osmolyte production, and upregulating of the antioxidant enzymes superoxide dismutase, peroxidase, and catalase in [13]. Khan et al [14] applied Bacillus subtilis, Bacillus thuringiensis, and Bacillus megaterium PGPR strains in chickpea (Cicer arietinum L.) and reported a significant increase in the chlorophyll, protein, and sugar content, along with an enhanced accumulation of riboflavin, L-asparagine, aspartate, glycerol, nicotinamide, and 3-hydroxy-3-contents in PGPR-treated plants compared with irrigated and drought conditions.…”

Section: Introductionmentioning

confidence: 99%

Comparative Analysis of Plant Growth-Promoting Rhizobacteria (PGPR) and Chemical Fertilizers on Quantitative and Qualitative Characteristics of Rainfed Wheat

et al. 2022

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The indiscriminate use of hazardous chemical fertilizers can be reduced by applying eco-friendly smart farming technologies, such as biofertilizers. The effects of five different types of plant growth-promoting rhizobacteria (PGPR), including Fla-wheat (F), Barvar-2 (B), Nitroxin (N1), Nitrokara (N2), and SWRI, and their integration with chemical fertilizers (50% and/or 100% need-based N, P, and Zn) on the quantitative and qualitative traits of a rainfed wheat cultivar were investigated. Field experiments, in the form of randomized complete block design (RCBD) with four replications, were conducted at the Qamloo Dryland Agricultural Research Station in Kurdistan Province, Iran, in three cropping seasons (2016–2017, 2017–2018, and 2018–2019). All the investigated characteristics of rainfed wheat were significantly affected by the integrated application of PGPR chemical fertilizers. The grain yield of treated plants with F, B, N1, and N2 PGPR plus 50% of need-based chemical fertilizers was increased by 28%, 28%, 37%, and 33%, respectively, compared with the noninoculated control. Compared with the noninoculated control, the grain protein content was increased by 0.54%, 0.88%, and 0.34% through the integrated application of F, N1, and N2 PGPR plus 50% of need-based chemical fertilizers, respectively. A combination of Nitroxin PGPR and 100% of need-based chemical fertilizers was the best treatment to increase the grain yield (56%) and grain protein content (1%) of the Azar-2 rainfed wheat cultivar. The results of this 3-year field study showed that the integrated nutrient management of PGPR-need-based N, P, and Zn chemical fertilizers can be considered a crop management tactic to increase the yield and quality of rainfed wheat and reduce chemical fertilization and subsequent environmental pollution and could be useful in terms of sustainable rainfed crop production.

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Synergistic effects of plant growth promoting rhizobacteria and silicon dioxide nano-particles for amelioration of drought stress in wheat

Cited by 129 publications

References 97 publications

Silicon- and Phosphate-Solubilizing Pseudomonas alkylphenolica PF9 Alleviate Low Phosphorus Availability Stress in Alfalfa (Medicago sativa L.)

Silicon- and Phosphate-Solubilizing Pseudomonas alkylphenolica PF9 Alleviate Low Phosphorus Availability Stress in Alfalfa (Medicago sativa L.)

Role of nanosilicab to boost the activities of metabolites in Triticum aestivum facing drought stress

Comparative Analysis of Plant Growth-Promoting Rhizobacteria (PGPR) and Chemical Fertilizers on Quantitative and Qualitative Characteristics of Rainfed Wheat

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