Tolerance to salinity and drought stresses in pistachio (Pistacia vera L.) seedlings inoculated with indigenous stress-tolerant PGPR isolates

Khalilpour, Mojdeh; Mozafari, Vahid; Abbaszadeh‐Dahaji, Payman

doi:10.1016/j.scienta.2021.110440

Cited by 50 publications

(21 citation statements)

References 70 publications

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“…Similar findings of salt stress alleviation have also been reported in other crops, such as maize (Aslam & Ali, 2018), soybean (Egamberdieva et al, 2017) and cotton (Yao et al, 2010), after application of auxin‐producing PGPR. The increase in nutrient uptake may be partially attributed to superior root development in the inoculated plants (Cordero et al, 2018; Khalilpour et al, 2021). In general, the leaf RWC is reduced in salt stress since water leaves the cell in response to the osmotic gradient generated (Cordero et al, 2018).…”

Section: Discussionmentioning

confidence: 99%

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Halotolerant native bacteria Enterobacter 64S1 and Pseudomonas 42P4 alleviate saline stress in tomato plants

Pérez-Rodriguez

Pontín

Píccoli

et al. 2022

Physiologia Plantarum

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Salinity is one of the principal abiotic stresses that limit the growth and productivity of crops. The use of halotolerant plant growth‐promoting rhizobacteria (PGPR) that increase the growth of salt‐stressed crops is an environmentally friendly alternative to promote plant yield under salinity. The aim of this study was to test native PGPR, isolated according to their tolerance to NaCl, and to evaluate their influence on morphological, physiological, and biochemical traits promoted by salt stress in tomato plants. Enterobacter 64S1 and Pseudomonas 42P4 were selected as the most efficient strains in terms of salt tolerance. Both strains were classified as moderately resistant to salinity (NaCl) and maintained their plant growth‐promoting activities, such as nitrogen fixation and phosphate solubilization, even in the presence of high levels of salt. The results of a greenhouse experiment demonstrated that PGPR inoculation increased root and shoot dry weight, stem diameter, plant height, and leaf area compared to control noninoculated plants under nonsaline stress conditions, reversing the effects of salinity. Inoculated plants showed increased tolerance to salt conditions by reducing electrolyte leakage (improved membrane stability) and lipid peroxidation and increasing chlorophyll quantum efficiency (Fv/Fm) and the performance index. Also, inoculation increased the accumulation of proline and antioxidant nonenzymatic compounds, such as carotenes and total phenolic compounds. The catalase and peroxidase activities increased with salinity, but the effect was reversed by Enterobacter 64S1. In conclusion, Enterobacter 64S1 and Pseudomonas 42P4 isolated from salt‐affected regions have the potential to alleviate the deleterious effects of salt stress in tomato crops.

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Section: Discussionmentioning

confidence: 99%

“…The increase in nutrient uptake may be partially attributed to superior root development in the inoculated plants (Cordero et al, 2018;Khalilpour et al, 2021). In general, the leaf RWC is reduced in salt stress since water leaves the cell in response to the osmotic gradient generated (Cordero et al, 2018).…”

Section: Discussionmentioning

confidence: 99%

Halotolerant native bacteria Enterobacter 64S1 and Pseudomonas 42P4 alleviate saline stress in tomato plants

Pérez-Rodriguez

Pontín

Píccoli

et al. 2022

Physiologia Plantarum

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“…Similarly, a plant growth-promoting rhizobacteria (P. mendocina), in combination with an arbuscular mycorrhizal fungus (G. intraradices), colonised lettuce plants, which presented higher concentrations of foliar K + and lower amounts of Na + under saline conditions [72]. The inoculation with other exopolysaccharide-producing rhizobacteria also indicated the important role that they play in alleviating saline stress conditions in different crops, such as soybean, wheat, alfalfa, or pistachio [47,[73][74][75].…”

Section: Ion Homeostasis (Regulation Of Ion Content)mentioning

confidence: 98%

Overview of the Role of Rhizobacteria in Plant Salt Stress Tolerance

2021

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Salinity is one of the main causes of abiotic stress in plants, resulting in negative effects on crop growth and yield, especially in arid and semi-arid regions. The effects of salinity on plant growth mainly generate osmotic stress, ion toxicity, nutrient deficiency, and oxidative stress. Traditional approaches for the development of salt-tolerant crops are expensive and time-consuming, as well as not always being easy to implement. Thus, the use of plant growth-promoting bacteria (PGPB) has been reported as a sustainable and cost-effective alternative to enhance plant tolerance to salt stress. In this sense, this review aims to understand the mechanisms by which PGPB help plants to alleviate saline stress, including: (i) changes in the plant hormonal balance; (ii) release of extracellular compounds acting as chemical signals for the plant or enhancing soil conditions for plant development; (iii) regulation of the internal ionic content of the plant; or iv) aiding in the synthesis of osmoprotectant compounds (which reduce osmotic stress). The potential provided by PGPB is therefore an invaluable resource for improving plant tolerance to salinity, thereby facilitating an increase in global food production and unravelling prospects for sustainable agricultural productivity.

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“…ESP-producing bacteria improved the wheat growth parameters and altered the nutrient uptake by improving the Na + concentration and boosting K + and Ca 2+ absorption in plants affected by salinity [ 246 , 287 ]. Similarly, ESP-producing rhizobacteria also revealed their importance in alleviating the salt stress conditions in several crops, such as wheat, soybean, pistachio, or alfalfa [ 264 , 279 , 288 , 289 ].…”

Section: Pgpb For Plant Growth Promotion and Stress Tolerancementioning

confidence: 99%

Mechanistic Insights of Plant Growth Promoting Bacteria Mediated Drought and Salt Stress Tolerance in Plants for Sustainable Agriculture

Gupta

Mishra

Rai

et al. 2022

IJMS

113

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Climate change has devastating effects on plant growth and yield. During ontogenesis, plants are subjected to a variety of abiotic stresses, including drought and salinity, affecting the crop loss (20–50%) and making them vulnerable in terms of survival. These stresses lead to the excessive production of reactive oxygen species (ROS) that damage nucleic acid, proteins, and lipids. Plant growth-promoting bacteria (PGPB) have remarkable capabilities in combating drought and salinity stress and improving plant growth, which enhances the crop productivity and contributes to food security. PGPB inoculation under abiotic stresses promotes plant growth through several modes of actions, such as the production of phytohormones, 1-aminocyclopropane-1-carboxylic acid deaminase, exopolysaccharide, siderophore, hydrogen cyanide, extracellular polymeric substances, volatile organic compounds, modulate antioxidants defense machinery, and abscisic acid, thereby preventing oxidative stress. These bacteria also provide osmotic balance; maintain ion homeostasis; and induce drought and salt-responsive genes, metabolic reprogramming, provide transcriptional changes in ion transporter genes, etc. Therefore, in this review, we summarize the effects of PGPB on drought and salinity stress to mitigate its detrimental effects. Furthermore, we also discuss the mechanistic insights of PGPB towards drought and salinity stress tolerance for sustainable agriculture.

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Tolerance to salinity and drought stresses in pistachio (Pistacia vera L.) seedlings inoculated with indigenous stress-tolerant PGPR isolates

Cited by 50 publications

References 70 publications

Halotolerant native bacteria Enterobacter 64S1 and Pseudomonas 42P4 alleviate saline stress in tomato plants

Halotolerant native bacteria Enterobacter 64S1 and Pseudomonas 42P4 alleviate saline stress in tomato plants

Overview of the Role of Rhizobacteria in Plant Salt Stress Tolerance

Mechanistic Insights of Plant Growth Promoting Bacteria Mediated Drought and Salt Stress Tolerance in Plants for Sustainable Agriculture

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