Phosphate solubilization byChryseobacteriumsp. and their combined effect with N and P fertilizers on plant growth promotion

2013 ◽  
Vol 59 (5) ◽  
pp. 641-651 ◽  
Author(s):  
Ajay Veer Singh ◽  
Ramesh Chandra ◽  
Reeta Goel
Keyword(s):  
Plant Growth ◽  
Plant Growth Promotion ◽  
Phosphate Solubilization ◽  
Growth Promotion ◽  
Combined Effect ◽  
P Fertilizers

scholarly journals Exploring the Multi-trait Plant Growth Promotion Capability of Commercial Liquid Biofertilizers Isolates

2015 ◽  
Vol 9 (3) ◽  
pp. 24-37 ◽  
Author(s):  
Mohammed Faisal Ansari ◽  
Devayani R. Tipre ◽  
Shailesh R. Dave
Keyword(s):  
Plant Growth ◽  
Plant Growth Promotion ◽  
Phosphate Solubilization ◽  
Growth Promotion ◽  
Acc Deaminase ◽  
Multiple Traits ◽  
The Past ◽  
Plant Growth Promoting ◽  
Growth Promoting ◽  
Field Efficiency

Organic farming is gaining popularity where bio-inoculants could play a key role in promoting the growth of plants. The liquid biofertilizers concept is new to farmers and developed recently. Lots of liquid biofertilizers formulations and field efficiency were shown in the past by various researchers, but the plant growth promoting (PGP) efficiency of the liquid biofertilizers isolates were not reported till date. In the present work 6 different commercially available liquid biofertilizers were used to isolate the organism. These isolated cultures were used to study their PGP efficiency with respect to phosphate solubilization and production of EPS, IAA, siderophore, ammonia, chitinase, ACC-deaminase and HCN. The phosphate solubilization was shown up to 303 g/ml by APS isolate. EPS production was shown by using different C sources and production up to 24 g/l was shown by studied isolated. Most of the organisms studied were able to produce IAA and highest production was shown up to 20 g/ml. More than 65% studied isolates showed siderophore and ACC-deaminase production. The present study shows that the commercial liquid biofertilizer isolates possess multiple traits of plant growth promotion. DOI: http://dx.doi.org/10.3126/ijls.v9i3.12463   International Journal of Life Sciences 9 (3): 2015; 24-37

Plant growth promoting traits shown by bacteria Brevibacterium frigrotolerans SMA23 Isolated from Aloe vera rhizosphere

2017 ◽  
Vol 37 (03) ◽  
Author(s):  
Meena . ◽  
Nayan Tara ◽  
Baljeet Singh Saharan
Keyword(s):  
Plant Growth ◽  
Plant Growth Promotion ◽  
Phosphate Solubilization ◽  
Growth Promotion ◽  
Aloe Vera ◽  
Maximum Growth ◽  
Iaa Production ◽  
Rrna Sequencing ◽  
Plant Growth Promoting ◽  
Growth Promoting

Brevibacterium frigrotolerans SMA23 is a gram positive rod shaped bacteria isolated from Aloe vera rhizosphere. 16S rRNA sequencing confirmed the identity of the bacterium as Brevibacterium frigrotolerans. It was capable of growing at temperatures ranging from 10°C to 35°C, but maximum growth was observed at 30°C. It is endowed with multiple plant growth promotion attributes such as phosphate solubilization, IAA production and siderophore production, which are expressed differentially at sub-optimal temperatures. At 10°C it was found to exhibit all the plant growth promotion attributes. This bacterial isolate was able to positively influence and promote the growth and nutrient uptake parameters of wheat (HD 2967) under glasshouse conditions.

scholarly journals Characterization of streptomycetes with potential to promote plant growth and biocontrol

2008 ◽  
Vol 65 (1) ◽  
pp. 50-55 ◽  
Author(s):  
Carla da Silva Sousa ◽  
Ana Cristina Fermino Soares ◽  
Marlon da Silva Garrido
Keyword(s):  
Acetic Acid ◽  
Plant Growth ◽  
Plant Growth Promotion ◽  
Indole Acetic Acid ◽  
Extracellular Enzymes ◽  
Root Colonization ◽  
Phosphate Solubilization ◽  
Culture Media ◽  
Growth Promotion ◽  
Salinity Levels

Studies with streptomycetes in biocontrol programs and plant growth promotion are presented as technological alternatives for environmental sustainable production. This work has the objective of characterizing six isolates of streptomycetes aiming the production of extracellular enzymes, indole acetic acid, capacity for phosphate solubilization, root colonization and growth under different pH and salinity levels. For detection of enzyme activity the isolates were grown in culture media with the enzyme substrates as sole carbon source. The root colonization assay was performed on tomato seedlings grown on 0.6% water-agar medium. Growth under different pH and salinity levels was evaluated in AGS medium with 1%, 1.5%, 2%, 2.5%, and 3% NaCl, and pH levels adjusted to 5.0, 5.5, 6.0, 6.5, and 7.0. All isolates produced the enzymes amylase, catalase, and lipase, as well as indole acetic acid. With one exception (AC-92), all isolates presented cellulolytic and chitinolytic activity, and only AC-26 did not show xylanolytic activity. The isolates AC-147, AC-95, and AC-29 were the highest producers of siderophores. The isolates AC-26 and AC-29 did not show capacity for phosphate solubilization. All isolates colonized tomato roots in vitro, and AC-92 grew under all pH and salinity levels tested. The streptomycetes tested were considered as potential biocontrol and plant growth promotion agents.

scholarly journals Genome Mining and Evaluation of the Biocontrol Potential of Pseudomonas fluorescens BRZ63, a New Endophyte of Oilseed Rape (Brassica napus L.) against Fungal Pathogens

2020 ◽  
Vol 21 (22) ◽  
pp. 8740
Author(s):  
Daria Chlebek ◽  
Artur Pinski ◽  
Joanna Żur ◽  
Justyna Michalska ◽  
Katarzyna Hupert-Kocurek
Keyword(s):  
Brassica Napus ◽  
Plant Growth ◽  
Pseudomonas Fluorescens ◽  
Oilseed Rape ◽  
Plant Growth Promotion ◽  
Fungal Pathogens ◽  
Growth Promotion ◽  
Genome Mining ◽  
Plant Colonization ◽  
Brassica Napus L

Endophytic bacteria hold tremendous potential for use as biocontrol agents. Our study aimed to investigate the biocontrol activity of Pseudomonas fluorescens BRZ63, a new endophyte of oilseed rape (Brassica napus L.) against Rhizoctonia solani W70, Colletotrichum dematium K, Sclerotinia sclerotiorum K2291, and Fusarium avenaceum. In addition, features crucial for biocontrol, plant growth promotion, and colonization were assessed and linked with the genome sequences. The in vitro tests showed that BRZ63 significantly inhibited the mycelium growth of all tested pathogens and stimulated germination and growth of oilseed rape seedlings treated with fungal pathogens. The BRZ63 strain can benefit plants by producing biosurfactants, siderophores, indole-3-acetic acid (IAA), 1-aminocyclopropane-1-carboxylate (ACC) deaminase, and ammonia as well as phosphate solubilization. The abilities of exopolysaccharide production, autoaggregation, and biofilm formation additionally underline its potential to plant colonization and hence biocontrol. The effective colonization properties of the BRZ63 strain were confirmed by microscopy observations of EGFP-expressing cells colonizing the root surface and epidermal cells of Arabidopsis thaliana Col-0. Genome mining identified many genes related to the biocontrol process, such as transporters, siderophores, and other secondary metabolites. All analyses revealed that the BRZ63 strain is an excellent endophytic candidate for biocontrol of various plant pathogens and plant growth promotion.

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