scholarly journals Assessment of plant growth promoting activities and abiotic stress tolerance of Azotobacter chroococcum strains for a potential use in sustainable agriculture

2016 ◽  
pp. 0-0 ◽  
Author(s):  
S Viscardi ◽  
V Ventorino ◽  
P Duran ◽  
A Maggio ◽  
S De Pascale ◽  
...  
Keyword(s):  
Abiotic Stress ◽  
Plant Growth ◽  
Sustainable Agriculture ◽  
Stress Tolerance ◽  
Abiotic Stress Tolerance ◽  
Azotobacter Chroococcum ◽  
Plant Growth Promoting Activities ◽  
Plant Growth Promoting ◽  
Growth Promoting ◽  
Potential Use

scholarly journals Isolation and Characterization of Abiotic Stress Tolerant Plant Growth Promoting Bacillus Spp. from Different Rhizospheric Soils of Telangana

2018 ◽  
Vol 15 (2) ◽  
pp. 485-494 ◽  
Author(s):  
K. Damodara Chari ◽  
R. Subhash Reddy ◽  
S. Triveni ◽  
N. Trimurtulu ◽  
CH. V. Durga Rani ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Abiotic Stress ◽  
Plant Growth ◽  
Stress Tolerance ◽  
Abiotic Stresses ◽  
Abiotic Stress Tolerance ◽  
Isolation And Characterization ◽  
Bacillus Spp ◽  
Plant Growth Promoting ◽  
Growth Promoting

Present investigation was carried out to identify plant growth promoting rhizobacterial isolates for abiotic stress tolerance. To achieve this bacterial isolates were isolated from different rhizospheric soils of Telanagana and screened for plant growth promoting properties and tolerance to different abiotic stresses such as pH, temperature, salt, drought and heavy metals. Such PGPR will be helpful for efficient management of abiotic stresses in crop production. Rhizospheric soils from normal, salt affected, drought affected and bulk soils were collected from different places of Telangana state. From all soil samples, based on cultural, morphological and biochemical characterization it was found that forty four were of Bacillus spp. Among the forty four (44) Bacillus isolates, twenty eight (28) isolates were showing plant growth promoting properties. These positive isolates tested for abiotic stress tolerance to pH, temperature, salt, drought and heavy metals (As and Cd). Four isolates were showed growth at pH range from 4-12 (BS 1, BS 3, BS 14, BS 18), five isolates were showed tolerance to 1.5 to 20 % of NaCl concentration (BS 1, BS 3, BS 14, BS 18, BS 42, six isolates showed tolerance to temperature from 20ºC -50ºC (BS 10, BS 14, BS 18, BS 27, BS 37, BS 43), four isolates showed tolerance to water potential from - 0.05 Mpa to- 0.73 Mpa (BS 4, BS 10, BS 18, BS 33).

scholarly journals In Vitro Screening for Abiotic Stress Tolerance in Potent Biocontrol and Plant Growth Promoting Strains of Pseudomonas and Bacillus spp.

2014 ◽  
Vol 2014 ◽  
pp. 1-6 ◽  
Author(s):  
G. Praveen Kumar ◽  
S. K. Mir Hassan Ahmed ◽  
Suseelendra Desai ◽  
E. Leo Daniel Amalraj ◽  
Abdul Rasul
Keyword(s):  
Plant Growth ◽  
Stress Tolerance ◽  
Abiotic Stresses ◽  
Abiotic Stress Tolerance ◽  
Plant Diseases ◽  
Growth Enhancement ◽  
Bacterial Strains ◽  
End User ◽  
Plant Growth Promoting ◽  
Growth Promoting

Plant growth promoting rhizobacteria (PGPR) has been identified as a group of microbes that are used for plant growth enhancement and biocontrol for management of plant diseases. The inconsistency in performance of these bacteria from laboratory to field conditions is compounded due to the prevailing abiotic stresses in the field. Therefore, selection of bacterial strains with tolerance to abiotic stresses would benefit the end-user by successful establishment of the strain for showing desired effects. In this study we attempted to isolate and identify strains of Bacillus and Pseudomonas spp. with stress tolerance and proven ability to inhibit the growth of potential phytopathogenic fungi. Screening of bacterial strains for high temperature (50°C), salinity (7% NaCl), and drought (−1.2 MPa) showed that stress tolerance was pronounced less in Pseudomonas isolates than in Bacillus strains. The reason behind this could be the formation of endospores by Bacillus isolates. Tolerance to drought was high in Pseudomonas strains than the other two stresses. Three strains, P8, P20 and P21 showed both salinity and temperature tolerance. P59 strain possessed promising antagonistic activity and drought tolerance. The magnitude of antagonism shown by Bacillus isolates was also higher when compared to Pseudomonas strains. To conclude, identification of microbial candidate strains with stress tolerance and other added characteristic features would help the end-user obtain the desired beneficial effects.

scholarly journals Actinobacteria for sustainable agriculture

2019 ◽  
Vol 6 (1) ◽  
pp. 38-41
Author(s):  
Neelam Yadav ◽  
 Ajar Nath Yadav
Keyword(s):  
Abiotic Stress ◽  
Plant Growth ◽  
Sustainable Agriculture ◽  
Soil Health ◽  
Stress Conditions ◽  
Gram Positive Bacteria ◽  
Plant Growth Promoting ◽  
Growth Promoting ◽  
Chelating Compounds ◽  
Biological Nitrogen

Actinobacteria is a phylum and class of Gram-positive bacteria. The phylum Actinobacteria are classified into six classes namely Acidimicrobiia, Actinobacteria, Coriobacteriia, Nitriliruptoria, Rubrobacteria and Thermoleophilia. Members of phylum Actinobacteria are ubiquitous in nature. Actinobacteria can be utilized as biofertilizers for sustainable agriculture as they can enhance plant growth and soil health though different plant growth promoting attributes such as solubilization of phosphorus, potassium and zinc, production of Fe-chelating compounds, phytohormones hormones such indole acetic acids, cytokinin, and gibberellins as well as by biological nitrogen fixation. The Actinobacteria also plays an important role in mitigation of different abiotic stress conditions in plants. The members of phylum Actinobacteria such as Actinomyces, Arthrobacter, Bifidobacterium, Cellulomonas, Clavibacter, Corynebacterium, Frankia, Microbacterium, Micrococcus, Mycobacterium, Nocardia, Propionibacterium, Pseudonocardia, Rhodococcus, Sanguibacter and Streptomyces exhibited the multifarious plant growth promoting attributes and could be used as biofertilizers for crops growing under natural as well as under the abiotic stress conditions for plant growth and soil health for sustainable agriculture.

scholarly journals The Effects of Plant-Associated Bacterial Exopolysaccharides on Plant Abiotic Stress Tolerance

Metabolites ◽  
2021 ◽  
Vol 11 (6) ◽  
pp. 337
Author(s):  
Rafael J. L. Morcillo ◽  
Maximino Manzanera
Keyword(s):  
Heavy Metal ◽  
Abiotic Stress ◽  
Plant Growth ◽  
Stress Tolerance ◽  
Abiotic Stresses ◽  
Abiotic Stress Tolerance ◽  
Plant Growth Promoting Rhizobacteria ◽  
Plant Growth Promoting ◽  
Microbe Interactions ◽  
Plant Abiotic Stress

Plant growth-promoting rhizobacteria (PGPR) are beneficial soil microorganisms that can stimulate plant growth and increase tolerance to biotic and abiotic stresses. Some PGPR are capable of secreting exopolysaccharides (EPS) to protect themselves and, consequently, their plant hosts against environmental fluctuations and other abiotic stresses such as drought, salinity, or heavy metal pollution. This review focuses on the enhancement of plant abiotic stress tolerance by bacterial EPS. We provide a comprehensive summary of the mechanisms through EPS to alleviate plant abiotic stress tolerance, including salinity, drought, temperature, and heavy metal toxicity. Finally, we discuss how these abiotic stresses may affect bacterial EPS production and its role during plant-microbe interactions.

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