scholarly journals Comparative Evaluation of Different Salt-Tolerant Plant Growth-Promoting Bacterial Isolates in Mitigating the Induced Adverse Effect of Salinity in Pisum sativum

2021 ◽  
Vol 11 (5) ◽  
pp. 13141-13154
Keyword(s):  
Pisum Sativum ◽  
Plant Growth ◽  
Growth Parameters ◽  
Nacl Stress ◽  
Limiting Factor ◽  
Salt Tolerant ◽  
Pgp Traits ◽  
Tolerant Plant ◽  
Plant Growth Promoting ◽  
Growth Promoting

Due to climate change, salinity has become a limiting factor for many leguminous crops. Therefore, we have explored the comparative study of salt-tolerant plant growth-promoting rhizobacteria (PGPR) for the promotion of plant growth. These PGPR (Bacillus subtilis RhStr_71, Bacillus safensis RhStr_223, and Bacillus cereus RhStr_JH5) were in vitro screened for plant growth-promoting (PGP) traits such as IAA, P-solubilization, siderophore, and ammonia production. They were further selected to evaluate the maximum NaCl tolerant level (MTL). Selected salt-tolerant PGP bacteria were further characterized to evaluate their PGP activity on seedlings of Pisum sativum under 1% NaCl stress. They were further selected to perform the greenhouse experiments under 1% NaCl stress to compare these isolates on morphological (like plant height and weight) and biochemical parameters(such as carbohydrate, reducing sugar, protein, phenol, flavonoids, chlorophylls, and carotenoids). In a pot experiment, NaCl significantly reduced the plant growth parameters compared to un-inoculated and inoculated. Additional analysis also had shown that these strains also enhanced the antioxidant enzymes, thereby preventing oxidative damage caused due to reactive oxygen species (ROS). The result revealed that these salt-tolerant PGP bacteria exert their beneficial effects on plant growth and play a necessary role in attenuating the salinity stress in agriculture.

scholarly journals Salt-Tolerant Plant Growth Promoting Rhizobacteria for Enhancing Crop Productivity of Saline Soils

2019 ◽  
Vol 10 ◽  
Author(s):  
Dilfuza Egamberdieva ◽  
Stephan Wirth ◽  
Sonoko Dorothea Bellingrath-Kimura ◽  
Jitendra Mishra ◽  
Naveen K. Arora
Keyword(s):  
Plant Growth ◽  
Plant Growth Promoting Rhizobacteria ◽  
Crop Productivity ◽  
Saline Soils ◽  
Salt Tolerant ◽  
Tolerant Plant ◽  
Plant Growth Promoting ◽  
Growth Promoting

scholarly journals Plant growth promoting Bipolaris sp. CSL-1 mitigate salinity stress in soybean via altering endogenous phytohormonal level, antioxidants and genes expression

2020 ◽  
Author(s):  
Lubna Lubna ◽  
Muhammad Aaqil Khan ◽  
Sajjad Asaf ◽  
Rehmatullah Jan ◽  
Muhammad Waqas ◽  
...  
Keyword(s):  
Plant Growth ◽  
Salinity Stress ◽  
Low Cost ◽  
Dry Weight ◽  
Nacl Stress ◽  
Fungal Isolate ◽  
Pgp Traits ◽  
Biotechnological Approach ◽  
Plant Growth Promoting ◽  
Growth Promoting

Abstract Background Salinity stress is one of the most devastating environmental stress that inhibits plants growth and development. Many strategies including plant growth promoting fungi have been reported to mitigate salt stress. Results In this study, we adopted environmental friendly technique and screened different plant growth promoting fungi for different PGP traits and salinity stress. Among these isolate CSL1 were selected based on the basis of plant growth promoting characteristics producing IAA, GAs, organic acid and tolerance to NaCl stress. Furthermore, inoculation of fungal isolate CSL1 significantly increased shoot length (16%), root length (37%), shoot fresh and dry weight (19% and 25%), root fresh and dry weight (47 and 51%) and chlorophyll content (24%) under NaCl stress (200 mM). Endogenous ABA level (0.77 folds) were significantly decreased while SA contents (16%) were increase in CSL1 inoculated plants under NaCl stress. Similarly, higher level of antioxidants such as MDA (2 folds), SOA (29%), POD (8 folds) and PPO (3 folds) was observed in NaCl treated non-inoculated plants. ICP analysis showed an increase in Na+ (11 folds) and decrease in K+ content (15%). Furthermore, CSL-1 inoculation improved soybean adaptability against NaCl stress and a significant decrease in GmFDL19 expression (5 folds) GmNARK (4 folds) and GmSIN1 (3 folds) was observed. However, higher expression of GmAKT2 (15%) were observed in CSL-1 treated plants. Conclusion Fungal isolate CSL-1 have capability to mitigate salinity stress in soybean, increase plant growth and could be used as valuable ecofriendly microorganism resource, low cost based biotechnological approach for sustainable agriculture in salt affected areas.

High salt tolerant plant growth promoting rhizobacteria from the common ice-plant Mesembryanthemum crystallinum L

Rhizosphere ◽  
2019 ◽  
Vol 9 ◽  
pp. 10-17 ◽  
Author(s):  
Ahmad Mahmood ◽  
Rio Amaya ◽  
Oğuz Can Turgay ◽  
Ahmet Emre Yaprak ◽  
Takeshi Taniguchi ◽  
...  
Keyword(s):  
Plant Growth ◽  
Plant Growth Promoting Rhizobacteria ◽  
High Salt ◽  
Mesembryanthemum Crystallinum ◽  
Salt Tolerant ◽  
Ice Plant ◽  
Tolerant Plant ◽  
Plant Growth Promoting ◽  
The Common ◽  
Growth Promoting

scholarly journals Mitigation of NaCl Stress in Wheat by Rhizosphere Engineering Using Salt Habitat Adapted PGPR Halotolerant Bacteria

2021 ◽  
Vol 11 (3) ◽  
pp. 1034
Author(s):  
Souhila Kerbab ◽  
Allaoua Silini ◽  
Ali Chenari Bouket ◽  
Hafsa Cherif-Silini ◽  
Manal Eshelli ◽  
...  
Keyword(s):  
Arabidopsis Thaliana ◽  
Salt Stress ◽  
Plant Growth ◽  
Durum Wheat ◽  
Growth Parameters ◽  
Nacl Stress ◽  
Stress Conditions ◽  
Bacterial Strains ◽  
Plant Growth Promoting ◽  
Growth Promoting

There is a great interest in mitigating soil salinity that limits plant growth and productivity. In this study, eighty-nine strains were isolated from the rhizosphere and endosphere of two halophyte species (Suaeda mollis and Salsola tetrandra) collected from three chotts in Algeria. They were screened for diverse plant growth-promoting traits, antifungal activity and tolerance to different physico-chemical conditions (pH, PEG, and NaCl) to evaluate their efficiency in mitigating salt stress and enhancing the growth of Arabidopsis thaliana and durum wheat under NaCl–stress conditions. Three bacterial strains BR5, OR15, and RB13 were finally selected and identified as Bacillus atropheus. The Bacterial strains (separately and combined) were then used for inoculating Arabidopsis thaliana and durum wheat during the seed germination stage under NaCl stress conditions. Results indicated that inoculation of both plant spp. with the bacterial strains separately or combined considerably improved the growth parameters. Three soils with different salinity levels (S1 = 0.48, S2 = 3.81, and S3 = 2.80 mS/cm) were used to investigate the effects of selected strains (BR5, OR15, and RB13; separately and combined) on several growth parameters of wheat plants. The inoculation (notably the multi-strain consortium) proved a better approach to increase the chlorophyll and carotenoid contents as compared to control plants. However, proline content, lipid peroxidation, and activities of antioxidant enzymes decreased after inoculation with the plant growth-promoting rhizobacteria (PGPR) that can attenuate the adverse effects of salt stress by reducing the reactive oxygen species (ROS) production. These results indicated that under saline soil conditions, halotolerant PGPR strains are promising candidates as biofertilizers under salt stress conditions.

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