Combined application of bio-organic phosphate and phosphorus solubilizing bacteria (Bacillus strain MWT 14) improve the performance of bread wheat with low fertilizer input under an arid climate

Tahir, Muhammad; Khalid, Umaira; Ijaz, Muhammad; Shah, Ghulam Mustafa; Naeem, Muhammad Asif; Shahid, Muhammad; Mahmood, Khalid; Ahmad, Naveed; Kareem, Fazal

doi:10.1016/j.bjm.2017.11.005

Cited by 70 publications

(44 citation statements)

References 44 publications

(92 reference statements)

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“…MK Abbasi [ 14 ] found that PSBs improve phosphorus deficiency in soil and plants, thereby promoting an increase in maize biomass. Additionally, M Tahir et al[ 15 ] showed that the combined application of bio-organic phosphate and PSBs could result in a higher wheat yield with low fertilizer input under an arid climate, providing a new option for eco-friendly agricultural development.…”

Section: Introductionmentioning

confidence: 99%

Root colonization and growth promotion of soybean, wheat and Chinese cabbage by Bacillus cereus YL6

Tian

et al. 2018

PLoS ONE

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Although phosphate-solubilizing bacteria (PSBs) are used in agricultural production, comprehensive research on PSB that colonize the rhizosphere of different plants and promote plant growth is lacking. This study was conducted to examine the growth-promoting effects and colonizing capacity of strain YL6, a PSB. YL6 not only increased the biomass of soybean and wheat in pot experiments but also increased the yield and growth of Chinese cabbage under field conditions. The observed growth promotion was related to the capacity of YL6 to dissolve inorganic and organic phosphorus and to produce indole-3-acetic (IAA) and gibberellin (GA). After applying YL6 to soybean, wheat and Chinese cabbage, the rhizosphere soil available phosphorus (available P) content increased by 120.16%, 62.47% and 7.21%, respectively, and the plant total phosphorus content increased by 198.60%, 6.20% and 78.89%, respectively, compared with plants not treated with YL6. To examine plant colonization, YL6 labeled with green fluorescent protein (YL6-GFP) was inoculated into the plant rhizosphere and found to first colonize the root surface and hairs and then to penetrate into the intercellular spaces and vessels. Collectively, these results demonstrate that YL6 promotes the growth of three different crops and colonizes them in a similar manner. The findings therefore provide a solid foundation for probing the mechanisms by which PSB affect plant growth.

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Section: Introductionmentioning

confidence: 99%

Root colonization and growth promotion of soybean, wheat and Chinese cabbage by Bacillus cereus YL6

Tian

et al. 2018

PLoS ONE

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“…Organic acid production through utilizing the sugars by the rhizobacteria present in rhizosphere, and growth as well as productivity improvement of wheat due to the bacterial inoculation by utilizing this mechanism under field conditions has been reported (Tahir et al 2015). Previous studies have reported that inoculation of PGPR strains along with reduced NP fertilizer dose improved the chlorophyll contents, LAI and CGR and positive relationship of these attributes with grain yield is well documented (Hussain et al 2016;Tahir et al, 2018). In the field experiments, population of PSB (CFU per gram dry soil) was significantly (P < 0Á05) highest at booting stage but was recorded minimum at maturity stage (Fig.…”

Section: Discussionmentioning

confidence: 99%

Inoculation of pqq E gene inhabiting Pantoea and Pseudomonas strains improves the growth and grain yield of wheat with a reduced amount of chemical fertilizer

et al. 2020

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Objective: The present study was performed to examine the role of pqqE inhabiting rhizobacteria in organic acid production and relationship of the organic acids with phosphate solubilization by the bacteria in vitro as well as in vivo. Methods and Results: The pqqE gene was PCR amplified and sequenced in genomic DNA of Pantoea sp. WP-5 and Pseudomonas sp. NN-4. Nucleotide sequence obtained from WP-5 and NN-4 showed maximum sequence similarity (88 and 89%, respectively) with the pqqE gene of Pseudomonas fluorescens strain CMR12a (KM251420). Deduced amino acid sequence from pqqE gene of Pseudomonas sp. NN-4 and Pantoea sp. WP-5 showed 75 and 93% similarity, respectively, with protein pyrroloquinoline quinone. Phosphate solubilization and acid production assay were quantified on spectrophotometer and high-profile liquid chromatograph, respectively, by each bacterial strain. Both strains produced organic acids such as acetic, citric, gluconic, succinic and malic acid and lowered the pH of Pikovskaya broth medium under laboratory conditions. Phosphate solubilization by Pantoea sp. WP-5 was 311 AE 4 and 204 AE 3 µg ml À1 in the culture medium supplemented with glucose and sucrose as carbon source, respectively. Pseudomonas sp. NN-4 solubilized 176 AE 3 and 298 AE 5 µg ml À1 phosphate in Pikovskaya broth medium under similar conditions. In field experiments conducted during two consecutive years, the concentration of acetic acid and gluconic acid was higher in root exudates of plants treated with Pantoea sp. WP-5 at 30% reduced doses of nitrogen (N)-and phosphorus (P)-based chemical fertilizers as compared to non-inoculated plants. Values of chlorophyll contents, crop growth rate, leaf area index, straw yield and P contents were recorded higher in plants inoculated with Pantoea sp. WP-5 and Pseudomonas sp. NN-4 as compared to non-inoculated control. Grain yield was increased by 10-12% due to inoculation with Pantoea sp. WP-5 and Pseudomonas sp. NN-4 over noninoculated control in the field experiments. Conclusions: These results lead to the conclusions that the rhizobacteria inhabiting pqqE gene produced organic acids and solubilized the phosphate in vitro. On inoculation to wheat plants in field experiments, these strains produced the organic acids, solubilized the phosphate, and improved the P uptake and productivity of wheat.

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“…Kumar and Singh reported that the inoculation of vermicompost with the phosphate solubilizing Pseudomonas striata significantly increased the available P 38 . Bacterial strains belonging to the genera Bacillus and Pseudomonas have been isolated from the rhizosphere of various plants and are reported to improve plant growth 39 . In our study, the relative abundance of Nitrospira in the increased organic fertilizer and reduced chemical fertilizer for two years treatment (T2) was significantly higher than that in the unfertilized or typical chemical fertilizer treatments (CK and T0) (Table 4), similar to Bacillus and Pseudomonas.…”

Section: Discussionmentioning

confidence: 99%

Increased organic fertilizer application and reduced chemical fertilizer application affect the soil properties and bacterial communities of grape rhizosphere soil

Zhao

et al. 2020

Sci Rep

104

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Increasing organic fertilizer application can improve the sustainability of soil productivity, but the effects of increased organic fertilizer application with reduced chemical fertilizer application over different time periods on chemical properties and bacterial community of grape rhizosphere soil in an arid region are not clear. In this study, three years of fixed-point field tests were used to compare the effects of various fertilization treatments on the soil properties and bacterial community in the grape rhizosphere. The results showed that (1) T1 and T2 significantly increased SOM, AN, AP and AK contents in grape rhizosphere soil. TN, TP and TK contents in grape leaves of T2 were the highest of those in five fertilization treatments. (2) The abundances of Proteobacteria and Bacteroidetes phyla and especially of Arthrobacter, Pseudomonas, Nitrosopira and Bacillus genera were higher in T2 than in the other samples. (3) SOM, AP and AN contents in soil were the main factors affecting soil bacterial community and mineral element contents in grape leaves and roots according to an RDA analysis. In summary, the application of organic fertilizer with reduced chemical fertilizer for two years had the greatest impact on the soil properties and bacterial community of the grape rhizosphere soil. Soil microbes play an important role in maintaining soil productivity through biochemical processes such as litter decomposition and nutrient recycling 1. The soil microbial community is an important factor influencing plant health because plant disease resistance mainly relies on the rhizosphere microbial community 2. Microbes are regarded as early warning indicators of soil quality because of their rapid response and sensitivity to environmental changes 3. Soil properties are greatly influenced by agronomic practices such as tillage, irrigation, and fertilization 4. Fertilization is widely used worldwide to improve soil fertility. Excessive fertilizer application aggravates the decline of soil organic matter and fertility and accelerates soil acidification 5. Soil properties affect the community structure of soil microbes 6. Fertilization influences soil microbial diversity through direct effects on the soil nutrient content 7. Soil microbial communities are sensitive to fertilization and their responses to manure and/or mineral fertilizers in soils have been well studied over the past several years 8,9. The long-term application of nitrogen fertilizer or nitrogen fertilizer in combination with other mineral fertilizers affects the nitrogen cycle and related bacterial populations 10. Repeated overuse of chemical fertilizer can have a negative effect on soil quality and soil microbial community structure. The long-term application of chemical fertilizers can significantly reduce soil pH which is closely associated with decreased bacterial diversity and significant changes in bacterial community composition, livestock manures can prevent soil acidification and its effects on soil bacteria 11. Geisseler and Scow found that with...

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Combined application of bio-organic phosphate and phosphorus solubilizing bacteria (Bacillus strain MWT 14) improve the performance of bread wheat with low fertilizer input under an arid climate

Cited by 70 publications

References 44 publications

Root colonization and growth promotion of soybean, wheat and Chinese cabbage by Bacillus cereus YL6

Root colonization and growth promotion of soybean, wheat and Chinese cabbage by Bacillus cereus YL6

Inoculation of pqq E gene inhabiting Pantoea and Pseudomonas strains improves the growth and grain yield of wheat with a reduced amount of chemical fertilizer

Increased organic fertilizer application and reduced chemical fertilizer application affect the soil properties and bacterial communities of grape rhizosphere soil

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