Bacteria from tropical semiarid temporary ponds promote maize growth under hydric stress

Araújo, Victor Lucas Vieira Prudêncio de; Lira, M. A.; Júnior, Valdomiro Severino de Souza; Filho, J. C. de Araújo; Fracetto, Felipe José Cury; Andreote, Fernando Dini; Pereira, Arthur Prudêncio de Araújo; Júnior, José Petrônio Mendes; Barros, Felipe Martins do Rêgo; Fracetto, Giselle Gomes Monteiro

doi:10.1016/j.micres.2020.126564

Cited by 13 publications

(6 citation statements)

References 68 publications

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“…In the absence of the inoculant, however, there was no difference between the water regimes under study. The present study shows that the use of Bacillus Aryabhattai may have produced compatible osmolytes, small organic molecules such as betaine that assist during environmental stress [64,65], and biofilm formation, that acts by forming a hydrated microenvironment around the root, retaining water, and making it available for longer [66], thereby mitigating water stress in maize grown under field conditions in the semi-arid region of the northeast of Brazil. The opposite effect to that seen in the present study was reported by [67] when irrigating uninoculated maize with brackish water at 100% of the ETc.…”

Section: Yieldmentioning

confidence: 98%

Bacillus aryabhattai Mitigates the Effects of Salt and Water Stress on the Agronomic Performance of Maize Under an Agroe-Cological System

Sousa¹,

Sousa²,

Viana³

et al. 2023

Preprint

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The use of plant growth-promoting bacteria can be one option for mitigating the impact of abiotic constraints on different cropping systems in the tropical semi-arid region. The aim of this study was to evaluate growth, leaf gas exchange and yield in maize inoculated with Bacillus aryabhattai, and subjected to water and salt stress. The experiment followed a randomised block design, in a split plot arrangement, with six repetitions. The plots comprised two levels of electrical conductivity for the irrigation water (ECw): 0.3 dS m-1 and 3.0 dS m-1; the subplots consisted of three irrigation depths (ID1: 50%, ID2: 75%, and ID3: 100% of the crop evapotranspiration (ETc)); while the sub-subplots included the presence or absence of Bacillus aryabhattai inoculant. A water deficit of 50% of the ETc resulted in the principal negative effects on growth, reducing the leaf area and stem diameter. The use of Bacillus aryabhattai mitigated salt stress and promoted better leaf gas exchange by increasing the CO2 assimilation rate, stomatal conductance, and internal CO2 concentration. However, irrigation with brackish water (3.0 dS m-1) reduced the instantaneous water use efficiency of the maize. Inoculation partially reduced the effects of abiotic stress due to morpho-physiological traits, and increased yield potential under water deficit with no salt stress.

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Section: Yieldmentioning

confidence: 98%

Bacillus aryabhattai Mitigates the Effects of Salt and Water Stress on the Agronomic Performance of Maize Under an Agroe-Cological System

Sousa¹,

Sousa²,

Viana³

et al. 2023

Preprint

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“…PGPR can also help plants through the production of hormones such as IAA that enhance root growth and lateral root formation, thereby increasing water uptake, decreasing leaf transpiration, improving nutrition and physiology, and controlling stomatal closure and metabolic activities. [196,197].…”

Section: Pgpr Improve Relative Water Content Rwcmentioning

confidence: 99%

Plant Growth-Promoting Rhizobacteria (PGPR): A Rampart against the Adverse Effects of Drought Stress

Bouremani

Cherif‐Silini

Silini

et al. 2023

Water

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Abiotic stress significantly limits plant growth and production. Drought, in particular, is a severe constraint that affects growth and limits agricultural productivity on a global scale. Water stress induces in plants a set of morpho-anatomical (modification of root and leaf structure), physiological, and biochemical (relative water content, membrane stability, photosynthesis, hormonal balance, antioxidant systems, and osmolyte accumulation) changes mainly employed to cope with the drought stress. These strategies allow the plant to overcome the unfavorable period of limited water availability. Currently, a promising alternative is available to improve plant growth and tolerance under drought conditions. The use of osmotolerant plant growth-promoting rhizobacteria (PGPR) as inoculants can alleviate water stress by increasing the water use efficiency of the plant. The PGPR improve the tolerance of plants to drought, through changes in the morphology and architecture of the root system, production of phytohormones, extracellular polysaccharides, ACC 1-(aminocyclopropane-1-carboxylate) deaminase, volatile chemicals, and osmolyte accumulation. They may also enhance the antioxidant defense system and induce transcriptional regulation of stress response genes. This review addresses the effects of stress on plant growth, adaptation, and response to drought conditions and discusses the significant potential of PGPR to modulate the physiological response against water scarcity, ensuring plant survival and improving the resistance and growth of agricultural crops.

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“…In the absence of the PGPB, however, there was no difference among the water regimes under study. The use of B. Aryabhattai produces compatible osmolytes, small organic molecules such as betaine that assist during environmental stress [31,69,70], and biofilm formation [71], which acts by forming a hydrated microenvironment around the root, retaining water, and making it available for longer [72], thereby mitigating water stress in maize grown under field conditions in the semi-arid region of the northeast of Brazil. Studies conducted with halotolerant rhizobacteria (HT-PGPR) report that they can also help saline soils to recover their natural balance, promoting benefits for plants grown under saline Studies using maize seeds inoculated with 'Graminante ® ', a commercial biotechnological product based on Azospirillum spp., and irrigated with low-salinity water returned similar results to the present study for ear length [66].…”

Section: Yieldmentioning

confidence: 99%

“…The use of B. Aryabhattai produces compatible osmolytes, small organic molecules such as betaine that assist during environmental stress [31,69,70], and biofilm formation [71], which acts by forming a hydrated microenvironment around the root, retaining water, and making it available for longer [72], thereby mitigating water stress in maize grown under field conditions in the semi-arid region of the northeast of Brazil. Studies conducted with halotolerant rhizobacteria (HT-PGPR) report that they can also help saline soils to recover their natural balance, promoting benefits for plants grown under saline conditions [73].…”

Section: Yieldmentioning

confidence: 99%

Bacillus aryabhattai Mitigates the Effects of Salt and Water Stress on the Agronomic Performance of Maize under an Agroecological System

Sousa

Viana

et al. 2023

Agriculture

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The use of plant-growth-promoting rhizobacteria (PGPR) can be one option for mitigating the impact of abiotic constraints on different cropping systems in the tropical semi-arid region. Studies suggest that these bacteria have mechanisms to mitigate the effects of water stress and to promote more significant growth in plant species. These mechanisms involve phenotypic changes in growth, water conservation, plant cell protection, and damage restoration through the integration of phytohormone modulation, stress-induced enzyme apparatus, and metabolites. The aim of this study was to evaluate the growth, leaf gas exchange, and yield in maize (Zea mays L.—BRS Caatingueiro) inoculated with Bacillus aryabhattai and subjected to water and salt stress. The experiment followed a randomised block design, in a split-plot arrangement, with six repetitions. The plots comprised two levels of electrical conductivity of the irrigation water (0.3 dS m−1 and 3.0 dS m−1); the subplots consisted of three irrigation depths (50%, 75%, and 100% of the crop evapotranspiration (ETc)); while the sub-subplots included the presence or absence of B. aryabhattai inoculant. A water deficit of 50% of the ETc resulted in the principal negative effects on growth, reducing the leaf area and stem diameter. The use of B. aryabhattai mitigated salt stress and promoted better leaf gas exchange by increasing the CO2 assimilation rate, stomatal conductance, and internal CO2 concentration. However, irrigation with brackish water (3.0 dS m−1) reduced the instantaneous water-use efficiency of the maize. Our results showed that inoculation wiht PGPR mitigates the effect of abiotic stress (salt and water) in maize plants, making it an option in regions with a scarcity of low-salinity water.

show abstract

Bacteria from tropical semiarid temporary ponds promote maize growth under hydric stress

Cited by 13 publications

References 68 publications

Bacillus aryabhattai Mitigates the Effects of Salt and Water Stress on the Agronomic Performance of Maize Under an Agroe-Cological System

Bacillus aryabhattai Mitigates the Effects of Salt and Water Stress on the Agronomic Performance of Maize Under an Agroe-Cological System

Plant Growth-Promoting Rhizobacteria (PGPR): A Rampart against the Adverse Effects of Drought Stress

Bacillus aryabhattai Mitigates the Effects of Salt and Water Stress on the Agronomic Performance of Maize under an Agroecological System

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