Isolation of phosphate solubilizing endophytic bacteria from Phyllanthus amarus Schum & Thonn: Evaluation of plant growth promotion and antioxidant activity under salt stress

2016 ◽  
Vol 3 (2) ◽  
pp. 71-77 ◽  
Author(s):  
Manoharan Melvin Joe ◽  
Shalini Devaraj ◽  
Abitha Benson ◽  
Tongmin Sa
Keyword(s):  
Antioxidant Activity ◽  
Salt Stress ◽  
Plant Growth ◽  
Plant Growth Promotion ◽  
Endophytic Bacteria ◽  
Growth Promotion ◽  
Phyllanthus Amarus ◽  
Phosphate Solubilizing

scholarly journals Salt Tolerant Rhizobacteria from Coastal Region of Bangladesh Portrayed the Potential for Plant Growth Promotion

2021 ◽  
pp. 58-70
Author(s):  
Md. Shoaib Arifin ◽  
Md. Shafiul Islam Rion ◽  
Atiqur Rahman ◽  
H. M. Zakir ◽  
Quazi Forhad Quadir
Keyword(s):  
Salt Stress ◽  
Plant Growth ◽  
Plant Growth Promotion ◽  
Growth Promotion ◽  
Research Work ◽  
Salt Tolerant ◽  
Salt Stress Condition ◽  
Plant Growth Promoting ◽  
Growth Promoting ◽  
Phosphate Solubilizing

Plant growth-promoting rhizobacteria can effectively reduce the severity of different abiotic stresses like water stress, temperature stress, salt stress, etc. on plant growth and development. The study aimed at isolating salt-tolerant rhizobacteria followed by their morphological, biochemical and plant growth promotion traits evaluation. Sixteen root samples of nine different plant species were collected from two locations of Patuakhali, a coastal southern district of Bangladesh. Thirty rhizobacteria were isolated, fifteen from each location, to assess their halotolerance and plant growth promoting potential. The isolated rhizobacteria were subjected to morphological (viz. shape, colour and elevation), biochemical (viz. Gram reaction, catalase test and HCN production) and growth-promoting traits [viz. phosphate solubilizing ability, salt tolerance, indole-3-acetic acid (IAA) production, and N2-fixation] characterization. Twenty-eight isolates were Gram positive, 27 were catalase positive, and nine showed varying degrees of phosphate solubilization on National Botanical Research Institute of Phosphate (NBRIP) medium. Isolate PWB5 showed the highest phosphate solubilizing index (PSI = 3.83±0.098) on the 6th day. To screen salt-tolerant rhizobacteria, the isolates were cultured in NBA media containing different (0%, 2.5%, 5%, 7.5%, 10%, 12%, 15%) NaCl concentrations. Isolate PWB12 and PWB13 grew at 15% NaCl concentration. Eleven isolates exhibited IAA producing ability on Winogradsky medium amended with L-tryptophan among which four (PMB13, PMB14, PMB15 and PWB6) were strong IAA producers. Twenty-seven isolates were potential N2-fixer and among them, 20 were highly efficient, but none of the isolates was HCN producer. The rhizobacteria isolated in the current research work showed some potential plant growth-promoting traits which seem applicable for crop production, especially, under salt stress condition.

Potential for plant growth promotion of Kocuria arsenatis Strain ST19 on tomato under salt stress conditions

2021 ◽  
Vol 138 ◽  
pp. 94-104
Author(s):  
Guendouz Dif ◽  
Hadj Ahmed Belaouni ◽  
Yacine Goudjal ◽  
Amine Yekkour ◽  
Nadjette Djemouai ◽  
...  
Keyword(s):  
Salt Stress ◽  
Plant Growth ◽  
Plant Growth Promotion ◽  
Growth Promotion ◽  
Stress Conditions

Role of bacterial pyrroloquinoline quinone in phosphate solubilizing ability and in plant growth promotion on strain Serratia sp. S119

Symbiosis ◽  
2016 ◽  
Vol 72 (1) ◽  
pp. 31-43 ◽  
Author(s):  
Liliana Mercedes Ludueña ◽  
María Soledad Anzuay ◽  
Jorge Guillermo Angelini ◽  
Germán Barros ◽  
María Flavia Luna ◽  
...  
Keyword(s):  
Plant Growth ◽  
Plant Growth Promotion ◽  
Growth Promotion ◽  
Pyrroloquinoline Quinone ◽  
Phosphate Solubilizing

Interactions between putatively endophytic bacteria and tall fescue (Festuca arundinacea): plant growth promotion and colonization in host and non-host cultivars

2019 ◽  
Vol 451 (1-2) ◽  
pp. 207-220
Author(s):  
Patricia Vaz Jauri ◽  
Cecilia Taulé ◽  
Maria Cecilia de los Santos ◽  
Belén Fernandez ◽  
Andrés Di Paolo ◽  
...  
Keyword(s):  
Plant Growth ◽  
Plant Growth Promotion ◽  
Tall Fescue ◽  
Festuca Arundinacea ◽  
Endophytic Bacteria ◽  
Growth Promotion

scholarly journals Characterization of bacterial endophytes from the roots of native and cultivated Brazil nut trees (Bertholletia excelsa)

2019 ◽  
Vol 49 (4) ◽  
pp. 257-267
Author(s):  
Patrícia Bombonati CHALITA ◽  
Eliane do Nascimento Cunha FARIAS ◽  
Ismaele Breckenfeld da COSTA ◽  
Brenda Ferreira SOUSA ◽  
Marco Antônio Oliveira dos SANTOS ◽  
...  
Keyword(s):  
Plant Growth ◽  
Plant Growth Promotion ◽  
Endophytic Bacteria ◽  
Growth Promotion ◽  
Nifh Gene ◽  
Aluminum Phosphate ◽  
Brazil Nut ◽  
Indole Compounds ◽  
Plant Growth Promoting ◽  
Growth Promoting

ABSTRACT Brazil nut is a very important nontimber forest product in the Amazon region. Propagation of this tree still represents a challenge due to slow and uneven seed germination. In this context, plant growth-promoting bacteria can facilitate the process of propagation. The aims of this study were to isolate and characterize endophytic bacteria from the roots of Brazil nut trees in native terra firme forest and cultivation areas in northern Brazil, and to identify mechanisms by which bacteria act in plant growth promotion. Overall, 90 bacterial isolates were obtained from the roots of Brazil nut trees in monoculture, agroforestry and native forest areas by using different semisolid media. The isolates were characterized by sequencing the 16S rRNA gene. Plant growth-promoting characteristics were evaluated by the presence of the nifH gene, aluminum phosphate solubilization and the production of indole compounds. The isolates were affiliated with 18 genera belonging to 5 different classes (α-Proteobacteria, β-Proteobacteria, γ-Proteobacteria, Bacilli and Actinobacteria). The genus Bacillus was predominant in the forest and monoculture areas. Fourteen isolates presented the nifH gene. Most of the bacteria were able to solubilize aluminum phosphate and synthetize indole compounds. The results indicated high diversity of endophytic bacteria present among the roots of Brazil nut trees, mainly in the agroforestry area, which could be related to soil attributes. Among the 90 isolates, the 22 that presented the best results regarding plant growth promotion traits were good candidates for testing in seedling production of Brazil nut trees.

scholarly journals Comparative Study on Plant Growth Promotion by Endophytic Pseudomonas Spp. and Bacillus Spp. of Solanum Lycopersicum

2017 ◽  
Vol 4 (4) ◽  
pp. 464-469
Author(s):  
Sampada Mishra ◽  
Saroj Kumar Mahato ◽  
Sabin Basi ◽  
Shradha Basi-Chipalu
Keyword(s):  
Plant Growth ◽  
Solanum Lycopersicum ◽  
Plant Growth Promotion ◽  
Growth Promotion ◽  
Shoot Biomass ◽  
Shoot Height ◽  
Plant Growth Hormones ◽  
Pseudomonas Spp ◽  
Bacillus Spp ◽  
Phosphate Solubilizing

Minimization of deleterious effects of chemical fertilizers on health, ecosystem and economy can only be achieved by finding healthy, eco-friendly and cheap alternatives. Naturally selected symbiotic relationship between the endophytic bacteria and their host plants makes them an ideal candidate as biofertilizer. They can synthesize various plant growth hormones as well as assist their host in uptake of nutrients from soil.The study was designed to compare plant growth promotion of Solanum lycopersicum by Bacillus spp., Pseudomonas spp. and total endophytic community isolated from roots of S. lycopersicum, grown in the soil samples collected from various locations of Kathmandu valley of Nepal. Tomato seeds were inoculated with mixtures of eight endophytic strains of Bacillus spp. and Pseudomonas spp., and crude endophytes obtained from each location separately.Endophytic treatments, except Pseudomonas spp., inhibited seminal root growth during 12-days germination period. However, after plantation, root and shoot biomass was enhanced by the endophytes, with no significant differences among the bacterial treatments. The shoot height was also enhanced, among which Pseudomonas spp. had the strongest effect. In phosphate solubilization assay, out of seventy-two isolates each of Bacillus spp. and Pseudomonas spp. tested, twenty-four isolates of Pseudomonas spp. and sixteen isolates of Bacillus spp. could solubilize phosphate. Higher number of phosphate solubilizing isolates of Pseudomonas spp. might provide a possible explanation for the greater enhancement of shoot height by Pseudomonas spp. as compared to Bacillus spp.Int J Appl Sci Biotechnol, Vol 4(4): 464-469

Efficacy of phosphate solubilizing Actinobacteria to improve rock phosphate agronomic effectiveness and plant growth promotion

Rhizosphere ◽  
2021 ◽  
Vol 17 ◽  
pp. 100284
Author(s):  
Abdoulaye Soumare ◽  
Kenza Boubekri ◽  
Karim Lyamlouli ◽  
Mohamed Hafidi ◽  
Yedir Ouhdouch ◽  
...  
Keyword(s):  
Plant Growth ◽  
Plant Growth Promotion ◽  
Rock Phosphate ◽  
Growth Promotion ◽  
Agronomic Effectiveness ◽  
Phosphate Solubilizing
Sign in / Sign up

Export Citation Format

Share Document