ACC Deaminase-Containing Rhizobacteria from Rhizosphere of Zygophyllum
coccineum Alleviate Salt Stress Impact on Wheat (Triticum aestivum L.)

Khalifa, Ashraf

doi:10.37575/b/agr/1988

Cited by 8 publications

(13 citation statements)

References 33 publications

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“…This may indicate that DPM17 is a nitrogen-fixing bacterium and possesses a nitrogenase enzyme. This observation is in general agreement with those reported in other studies [11,34]. Nitrogen-fixing PGPB can significantly satisfy nitrogen requirements for plants, thus improving soil health and crop yield.…”

Section: Discussionsupporting

confidence: 93%

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Plant Growth-Promoting Bacterium from Non-Agricultural Soil Improves Okra Plant Growth

2022

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Beneficial soil microorganisms influence nutrient recycling, soil fertility, plant growth, and productivity and reduce chemical fertilizer application. This study aimed to isolate bacteria from non-agricultural soils in the Al-Ahsa region and characterize the bacteria with the best biostimulating characteristics at the physiological, biochemical, and molecular level. DPM17, a bacterial isolate, promotes plant growth through phosphate solubilization, nitrogen fixation, and ammonia production. DPM17 also produces the phytohormones, indole acetic acid (IAA; 4.516 μg mL−1) and gibberellin (1.33 µg mL−1), and ammonia (0.06 µg mL−1). Additionally, DPM17 grows in the presence of up to 10% NaCl, indicating its halophilic nature. DPM17 was identified as Bacillus baekryungensis based on comparative sequence analysis of the 16S rRNA gene, and neighbor-joining phylogenetic analyses indicated that DPM17 was 96.51% identified to Bacillus sp. DPM17 inoculation substantially improved Abelmoschus esculentus (okra) root length, lateral root count, and dry weight from 7.03 to 9.41 (p = 0.03), 3.2 to 7.2, and 6 to 13 mg (p = 0.032), respectively. The results suggest that DPM17 enhances plant growth and can be exploited to develop efficient formulations for sustainable agriculture and food security in Saudi Arabia.

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Section: Discussionsupporting

confidence: 93%

“…The biostimulation properties of PGPB isolated from Al-Ahsa, Saudi Arabia, have been investigated. Bacillus megaterium and Enterobacter cloacae were isolated from Medicago sativa root nodules and roots, respectively [8][9][10][11]. Pseudomonas monteilii was isolated from Solanum lycopersicum [12].…”

Section: Introductionmentioning

confidence: 99%

Plant Growth-Promoting Bacterium from Non-Agricultural Soil Improves Okra Plant Growth

2022

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“…Nitrogen is an essential nutrient for normal plant growth because it is found in amino acids, chlorophyll, nucleic acids, and crop production. The atmosphere are taxonomically diverse and metabolically versatile promising groups of bacteria such as Bacillus (Khalifa and Almalki, 2015), Enterobacter (Khalifa et al, 2016;Khalifa, 2020) Streptomyces, Sinorhizobium (AlAli et al, 2021, Pseudomonas (Aldayel and Khalifa, 2021), Delftia acidovorans (Khalifa and Almalki 2019), Janibacter indicus, and Brevibacterium casei (Khalifa et al, 2020). The number of PGPB taxa has been steadily rising in recent years.…”

Section: Pgpb As Biofertilizersmentioning

confidence: 99%

Plant growth promoting bacteria drive food security

Al-Tammar

Khalifa

2022

Braz. J. Biol.

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The essence of food security centers on ensuring availability and accessibility of foods in adequate amounts and quality for all populations at all times for an active and healthy life. Microorganisms are tiny bioreactors, which represent sustainable resources and promising approaches to bridging the gap between food production and consumption globally via various biotechnological applications. This review focuses on plant-growth promoting bacteria (PGPB) which exert their potential impacts on increasing soil fertility, plant growth, and productivity through a variety of processes, including direct, indirect, and synergistic mechanisms. PGPB plays a substantial role in accelerating nutrients' availability such as (N, P), producing phytohormones such as gibberellins, IAA, and bioactive compounds against biotic and abiotic stressors. Recent advances in PGPB will be addressed as a sustainable approach to satisfy global food demand.

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“…Despite numerous studies having documented the potential benefits of rhizobacteria in the Kingdom, including in Al-Ahsa (Khalifa and Almalki 2015;Khalifa et al, 2016;Khalifa et al, 2019, Khalifa et al, 2020, few studies have focused on the role of rhizobacteria in alleviating salinity stress in plants. Recently, Khalifa et al (2019) been documented in the literature.…”

Section: Introductionmentioning

confidence: 99%

Isolation and characterization of bacteria from tomato and assessment of its plant growth-promoting traits in three economically important crops in Al-Ahsa region, Saudi Arabia

Aldayel¹,

Khalifa²

2021

JEB

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Aim: This study aimed to isolate, characterize and assess the plant growth-promoting traits of bacterial isolates inhabiting the rhizosphere of Solanum lycopersicum L. (tomato) against three plants—Eruca sativa, Lepidium sativum and Raphanus sativum—from Saudi Arabia's Al-Ahsa region. Methodology: bacterial isolate designated as SLK10 was obtained from the rhizosphere of tomato grown in the Al-Ahsa region, Saudi Arabia. SLK10 was further characterized morphologically, biochemically and genotypically using 16S rRNA gene sequencing. The roles in alleviating salt stress effects on three important economic crops were also assessed by implementing a cross-inoculation strategy. Results: SLK10 formed a circular, non-pigmented and raised colony with an entire margin. The cells were rod shaped and Gram negative. SLK10 displayed multiple plant growth-stimulating features, such as the solubilization of inorganic phosphate and the production of phytohormones and acetoin. Comparative sequence analysis of 16S rRNA gene revealed that SLK10 belonged to Pseudomonas monteilii, to which it exhibited 99.86% sequence homology. SLK10 significantly promoted the length of primary root, stem and number of leaves in Eruca sativa, Lepidium sativumand Raphanus sativus growing under 1000 ppm salt stress. The number of leaves in L. sativum and R. sativus growing under 2000 ppm salt stress was substantially enhanced by SLK10. Interpretation: SLK10 is a plant growth-promoting bacterium and can be used as a green fertilizer to increase soil fertility and plant productivity in the Eastern region of Saudi Arabia.

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ACC Deaminase-Containing Rhizobacteria from Rhizosphere of Zygophyllum coccineum Alleviate Salt Stress Impact on Wheat (Triticum aestivum L.)

Cited by 8 publications

References 33 publications

Plant Growth-Promoting Bacterium from Non-Agricultural Soil Improves Okra Plant Growth

Plant Growth-Promoting Bacterium from Non-Agricultural Soil Improves Okra Plant Growth

Plant growth promoting bacteria drive food security

Isolation and characterization of bacteria from tomato and assessment of its plant growth-promoting traits in three economically important crops in Al-Ahsa region, Saudi Arabia

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