Role of Biofertilizers in Sustainable Agriculture Under Abiotic Stresses

Selim, Shady; Zayed, Mona S.

doi:10.1007/978-981-10-6241-4_15

Cited by 9 publications

(7 citation statements)

References 137 publications

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“…According to the previous reports, approximately 831 million hectares of the land area are affected by salt worldwide [ 39 ]. Salinity impedes photosynthesis and increases photorespiration, thereby altering the normal ion homeostasis of cells by providing nutrient imbalance, which is caused by loss of the plant’s ability to control nutrient uptake and/or transport from root to shoot, leading to ion deficiencies [ 35 ]. Microbial forms of life can be found over a vast range of salt concentrations.…”

Section: Discussionmentioning

confidence: 99%

Maize growth response to different Bacillus strains isolated from a salt-marshland area under salinity stress

2022

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Maize (Zea mays) growth performance has been hindered due to the high soil salinity. Salinity is one of the most severe abiotic stresses that has led to growth imbalance and profitability of harvests in arid and semi-arid regions. Plants have taken advantage of salt-tolerant bacteria as plant growth-promoters to enhance growth and reduce the adverse effects of salinity through the regulation of some biochemical, physiological, and molecular features. Preferences for non-chemical, eco-friendly, and economical approaches have caused the inquiry of the Bacillus genus as a joint group of plant growth-promoting rhizobacteria known to alleviate salt-stress impacts. In the present study, halotolerant Bacillus strains were isolated from salt-marshland soil and characterized for their physiological, molecular, and biochemical properties. Twenty-four bacterial isolates collected from high saline fields of salt marshland were analyzed by MALDI-TOF MS proteome analysis, which confirmed the taxonomic affiliation with Bacillus cereus, Bacillus subtilis, Bacillus atrophaeus, and Bacillus thorngiensis. Applying the isolates on maize plants as bio-inoculant bacteria obviously increased the growth parameters (P < 0.01). Pot experiments showed that isolates 74 and 90 were the most prominent strains to minimize the harmful effects of salinity. Its effects are heightening the potassium/sodium ratio and K-Na selectivity in shoots and roots measured by flame atomic absorption photometry (AAS). Accordingly, Bacillus cereus isolate 74 showed a maximum increase in dry weights of the shoot (133.89%), root (237.08%), length of the shoot (125%), and root (119.44%) compared to the control condition. Our findings suggest that bacteria isolated from marshland may be an economical and simple means to increase plant growth and resistance to high salinity soil conditions.

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Section: Discussionmentioning

confidence: 99%

Maize growth response to different Bacillus strains isolated from a salt-marshland area under salinity stress

2022

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“…Ethylene, also known as the stress hormone, is a phytohormone present in all higher plants, making it a key element in a wide range of biological activities, intervening in processes that affect the growth and development of plants where almost all plant tissues and their stages of development are affected by it. It is produced from 1-aminocyclopropane-1-carboxylic acid (ACC) and is catalyzed by the enzyme ACC oxidase [59,60]. Most abiotic stresses cause a large increase in ethylene concentration causing wilting of the flowers or initiating senescence in the leaves among other consequences, so its increase translates into harmful effects on the growth and health of plants and therefore to a reduction in crop production.…”

Section: Acc Deaminase Activitymentioning

confidence: 99%

“…ACC deaminase hydrolyses ACC in ammonia and 2-oxobutanoate, thus causing a reduction in the concentration of ethylene in plants [64]. Among ACC deaminase producing microorganisms are the following genera: Bacillus, Pseudomonas, Klebsiella, Serratia, Arthrobacter, Azospirillum, Streptomyces, Microbacterium, Achromobacter, Acinetobacter, Acidovorax, Agrobacterium, Alcaligenes, Enterobacter, Agrobacterium, and Rhizobium [59,60]. The interaction of these microorganisms with legumes enhances plant growth and crop productivity under stress conditions ( Table 2).…”

Section: Acc Deaminase Activitymentioning

confidence: 99%

Helping Legumes under Stress Situations: Inoculation with Beneficial Microorganisms

Navarro‐Torre¹,

Bessadok²,

Flores-Duarte³

et al. 2020

Legume Crops [Working Title]

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In the upcoming years, legume crops will be subjected to multiple, diverse, and overlapping environmental stressors (raise in global temperatures and CO 2 , drought, salinity, and soil pollution). These factors will menace legume productivity and food quality and security. In this context, tolerant plant growth promoting rhizobacteria (PGPR) are useful biotechnological tools to assist legume establishment and growth. In this chapter, tolerant PGPR able to promote legume growth will be revised. Besides, in the era of-omics, the mechanisms underlying this interaction are being deciphered, particularly transcriptomic, proteomic, and metabolomic changes modulated by PGPR, as well as the molecular dialog legume-rhizobacteria.

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“…Basically, the soil's chemical and biological characteristics can be enhanced by the use of biofertilizers. this enhancement will lead to the use of low doses of chemical fertilizers; hence, agricultural production will be free from contaminants (Selim and Zayed 2017). Crop productivity can be raised by the use of biofertilizers via plant hormone productivity, nitrogen fixation and phosphate solubilization.…”

Section: Introductionmentioning

confidence: 99%

“…Also, biofrtilizers are recommended for the improvement of soil fertility. Endophytes are defined as microbes that colonize living, internal tissues of plants without exhibiting any negative effects (Selim and Zayed 2017). Rhizobia improves the defense mechanisms of plants against the stressed conditions via inducing the production of 1-aminocyclopropane-1-carboxylate deaminase (enzyme), which facilitates plant growth by decreasing the ethylene levels, inducing salt tolerance as well as decreasing drought stress in plants (Armada et al 2015).…”

Section: Introductionmentioning

confidence: 99%

Promoting of abiotic stress–induced resistance using Poly-β-Hydroxybutyrate (PHB) by Rhizobium phaseoli in common bean plants.

Selim

El-Haddad

Nassef

et al. 2021

Arab Universities Journal of Agricultural Sciences

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In total, 50 Rhizobium isolates were isolated from the mature root nodules of common beans plants (Phaseolus vulgaris) grown in different nine governorates of Egypt. PHB was optimized by the identified strain using response surface methodology. A total of 11 parameters (pH, incubation period, inoculum size, temperature, agitation speed, mannitol, sucrose, yeast extract, glycine, K2HPO4, and MgSO4) were analyzed for their significant effects on PHB production by the Plackett-Burman design (PBD). Sucrose, yeast extract, glycine, and MgSO4 were the main significant factors affecting PHB accumulation. Central composite design (CCD) of the response surface methodology was used to determine the optimum levels of the selected factors. Rhizobium phaseoli reached the maximum production (4.997 g/L) at run 36 in the presence of 25 g/L of sucrose, 0.0 g/L of yeast extract, 0.87 g/L of glycine, 0.3 g/L of MgSO4, and 5% of inoculation size. Invitro experiments were carried out to test the effect of different stress conditions (pH: 6-11, temperature: 5°C-50°C, salinity: 0.01%-7%, and drought: 0%-5% w/v) on the growth of Rhizobium phaseoli. The results showed that Rhizobium phaseoli can withstand 3% -5% NaCl, high temperature of 30°C-45°C, alkalinity at pH value of 8 -10, and drought stress at 3% -5% w/v polyethylene glycol with growth loss of 50% when grown on modified medium and 75% when grown on the basal one. In vivo experiments were done to study the effect of drought stress levels on the growth parameters of common bean plants. In general, all the treatments with Rhizobium phaseoli grown on the modified medium were superior to Rhizobium phaseoli grown on the basal medium. Also, they showed high tolerance of drought conditions.

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Role of Biofertilizers in Sustainable Agriculture Under Abiotic Stresses

Cited by 9 publications

References 137 publications

Maize growth response to different Bacillus strains isolated from a salt-marshland area under salinity stress

Maize growth response to different Bacillus strains isolated from a salt-marshland area under salinity stress

Helping Legumes under Stress Situations: Inoculation with Beneficial Microorganisms

Promoting of abiotic stress–induced resistance using Poly-β-Hydroxybutyrate (PHB) by Rhizobium phaseoli in common bean plants.

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