Impact of Soil Salinity on Diversity and Community of Sugarcane Endophytic Plant Growth Promoting Bacteria (Saccharum Officinarum L. Var. Cp48)

Pirhadi, Mohadeseh

doi:10.15666/aeer/1601_725739

Cited by 18 publications

(12 citation statements)

References 37 publications

(35 reference statements)

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“…This finding also supports previous research (Azziz et al 2012). Isolation studies for PSM identification from saline soils identified endophytic halotolerant Bacillus and Pseudomonas (Naz and Bano 2010;Pirhadi et al 2018). Rodríguez and Fraga (1999) demonstrated that Bacillus and Pseudomonas species were able to dissolve insoluble phosphorus, thereby increasing the available phosphorus content in soil.…”

Section: Discussionsupporting

confidence: 88%

“…Based on previous research, isolation and utilization of PGPR from corresponding microbial niches maximizes their use as inoculation agents (Ahemad and Kibret 2012). However, few studies have investigated the diversity of saline soils and how this stressful environmental condition affects PSM diversity and performance (Naz and Bano 2010;Pirhadi et al 2018). Moreover, the roles of specific organic acids are unclear, and substantial variation has been observed in organic acid types produced by various PSMs (Wei et al 2018).…”

Section: Introductionmentioning

confidence: 99%

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Isolation and characterization of halotolerant phosphate-solubilizing microorganisms from saline soils

Jiang

Wang³

et al. 2018

3 Biotech

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Halotolerant phosphate-solubilizing microorganisms (PSMs) capable of producing plant-growth-promoting traits were grown on salt medium containing Ca 3 (PO 4 ) 2 or egg yolk. The number of colonies on plates with Ca 3 (PO 4 ) 2 was higher than that on plates with egg yolk. Further, a total of 42 PSM isolates were purified. The majority were Bacillus spp., while one Providencia rettgeri strain was confirmed, for the first time, as a PSM. All PSMs had a phosphate-solubilizing index (PSI) between 1.1 and 2.58 and a strong capacity for dissolving calcium phosphate between 2.25 and 442 mg•L −1 . In contrast, these PSMs were less effective when dissolving aluminum phosphate, ferric phosphate and lecithin. Isolates were also tested for growth-promoting substances. The results showed that all isolates were able to secrete indole-3-acetic acid in amounts ranging from 2.7 to 31.8 mg•L −1 and exopolysaccharide within the range 74.3 and 225.7 mg•L −1 . Only 12 siderophore-producing strains with siderophore units of 1.9-42.1% were detected. Among them, ten isolates with solubilization rates greater than 200 mg•L −1 and relatively high NaCl tolerance (1.5 M) were classified as candidate PSMs. Eight different organic acids with different contents were detected in the culture filtrates, and propionic and oxalic acids have been proposed as the main mechanisms for solubilization. The ten isolates have the potential for use as bioinoculants to protect plants in saline environments.

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Section: Discussionsupporting

confidence: 88%

Section: Introductionmentioning

confidence: 99%

Isolation and characterization of halotolerant phosphate-solubilizing microorganisms from saline soils

Jiang

Wang³

et al. 2018

3 Biotech

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“…For the representatives of the genus Microbacterium , the multiple stress tolerance is shown [60]. Among the bacteria of the genus Paenibacillus , the halotolerant forms [67],[68] were described and were previously isolated, in particular, from the soils of the Sahara Desert [69]. Among Arthrobacter , genera the strains resistant to extreme desiccation [70] to antibiotics, heavy metals, as well as high UV- and radioresistance are known [28],[71]–[74].…”

Section: Discussionmentioning

confidence: 99%

Soil bacterial communities of Sahara and Gibson deserts: Physiological and taxonomical characteristics

Belov¹,

Cheptsov²,

Vorobyova

2018

AIMS Microbiology

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The purpose of this research was to investigate the structure of soil bacteria communities present in the Gibson (Australia) and the Sahara (Egypt) deserts, as well as to estimate strain survivability under different environmental factors. It should be noticed that the screening of bacterial resistance to wide spectra of principally different stress conditions was performed for the first time. Experiments were conducted with culturable bacterial communities. Strains were identified using 16S rRNA sequencing, and stress-tolerance was estimated by growing strains in various nutrient media. In order to characterize the community the epifluorescent microscopy and multisubstrate testing were also performed. High bacterial abundance in the desert soils was detected, and there was seen a significant proportion of culturable cells. The close numbers of psychotropic and mesophilic bacteria in arid ecosystems were revealed. The representatives of the Actinobacteria phylum were dominant in the microbial communities, and Firmicutes , Proteobacteria , and Bacteroidetes phyla representatives were also identified. Tolerance of the axenic bacterial cultures, isolated from arid desert ecotopes, to temperature, pH, salts (KCl, NaCl, MgSO 4 , NaHCO 3 ), strong oxidizers (Mg(ClO 4 ) 2 ), and antibiotics (ampicillin, cephalexin, chloramphenicol, tetracycline, doxycycline, kanamycin, rifampicin) was studied. The bacterial isolates were characterized by polyextremotolerance and by the ability to maintain metabolic activity in vitro while influenced by a wide range of physicochemical and biotic factors.

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“…Several indicator groups for added Na communities were identified, including Corynebacterium -a Gram-positive bacterium in the Actinobacteria phylum. While multiple Corynebacterium species are notable human pathogens (Bernard, 2012), other research has identified isolates of this genus that are highly associated with sugarcane rhizosphere with increased soil salinity (Pirhadi, 2018). Phyllobacteriaceae and Streptococcaceae were also indicator groups for added Na and are bacterial families previously identified to be associated with high saline soil microbiomes (de León-Lorenzana et al, 2017;Genderjahn et al, 2018).…”

Section: Bacterial Communitiesmentioning

confidence: 99%

Environmental Nutrients Alter Bacterial and Fungal Gut Microbiomes in the Common Meadow Katydid, Orchelimum vulgare

2020

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Insect gut microbiomes consist of bacteria, fungi, and viruses that can act as mutualists to influence the health and fitness of their hosts. While much has been done to increase understanding of the effects of environmental factors that drive insect ecology, there is less understanding of the effects of environmental factors on these gut microbial communities. For example, the effect of environmental nutrients on most insect gut microbiomes is poorly defined. To address this knowledge gap, we investigated the relationship between environmental nutrients and the gut microbial communities in a small study of katydids (n = 13) of the orthopteran species Orchelimum vulgare collected from a costal prairie system. We sampled O. vulgare from unfertilized plots, as well as from plots fertilized with added nitrogen and phosphorus or sodium separately and in combination. We found significantly higher Shannon diversity for the gut bacterial communities in O. vulgare from plots fertilized with added sodium as compared to those collected from plots without added sodium. In contrast, diversity was significantly lower in the gut fungal communities of grasshoppers collected from plots with added nitrogen and phosphorus, as well as those with added sodium, in comparison to those with no added nutrients. There was also a strong positive correlation between the gut bacterial and gut fungal community diversity within each sample. Indicator group analysis for added sodium plots included several taxa with known salt-tolerant bacterial and fungal representatives. Therefore, despite the small sample number, these results highlight the potential for the gut bacterial and fungal constituents to respond differently to changes in environmental nutrient levels. Future studies with a larger sample size will help identify mechanistic determinants driving these changes. Based on our findings and the potential contribution of gut microbes to insect fitness and function, consideration of abiotic factors like soil nutrients along with characteristic gut microbial groups is necessary for better understanding and conservation of this important insect herbivore.

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Impact of Soil Salinity on Diversity and Community of Sugarcane Endophytic Plant Growth Promoting Bacteria (Saccharum Officinarum L. Var. Cp48)

Cited by 18 publications

References 37 publications

Isolation and characterization of halotolerant phosphate-solubilizing microorganisms from saline soils

Isolation and characterization of halotolerant phosphate-solubilizing microorganisms from saline soils

Soil bacterial communities of Sahara and Gibson deserts: Physiological and taxonomical characteristics

Environmental Nutrients Alter Bacterial and Fungal Gut Microbiomes in the Common Meadow Katydid, Orchelimum vulgare

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