scholarly journals PGPR (Plant Growth Promoting Rizobacteria) Benefits in Spurring Germination, Growth and Increase the Yield of Tomato Plants

2019 ◽  
Author(s):  
I Ketut Widnyana
Keyword(s):  
Plant Growth ◽  
Tomato Plants ◽  
Plant Growth Promoting ◽  
Growth Promoting

scholarly journals Protection of Tomato Seedlings against Infection by Pseudomonas syringae pv. Tomato by Using the Plant Growth-Promoting Bacterium Azospirillum brasilense

2002 ◽  
Vol 68 (6) ◽  
pp. 2637-2643 ◽  
Author(s):  
Yoav Bashan ◽  
Luz E. de-Bashan
Keyword(s):  
Plant Growth ◽  
Pseudomonas Syringae ◽  
Azospirillum Brasilense ◽  
Dry Weight ◽  
Tomato Plants ◽  
Bacterial Speck ◽  
Plant Growth Promoting ◽  
Bacterial Speck Disease ◽  
Growth Promoting ◽  
Mist Chamber

ABSTRACT Pseudomonas syringae pv. tomato, the causal agent of bacterial speck of tomato, and the plant growth-promoting bacterium Azospirillum brasilense were inoculated onto tomato plants, either alone, as a mixed culture, or consecutively. The population dynamics in the rhizosphere and foliage, the development of bacterial speck disease, and their effects on plant growth were monitored. When inoculated onto separate plants, the A. brasilense population in the rhizosphere of tomato plants was 2 orders of magnitude greater than the population of P. syringae pv. tomato (107 versus 105 CFU/g [dry weight] of root). Under mist chamber conditions, the leaf population of P. syringae pv. tomato was 1 order of magnitude greater than that of A. brasilense (107 versus 106 CFU/g [dry weight] of leaf). Inoculation of seeds with a mixed culture of the two bacterial strains resulted in a reduction of the pathogen population in the rhizosphere, an increase in the A. brasilense population, the prevention of bacterial speck disease development, and improved plant growth. Inoculation of leaves with the mixed bacterial culture under mist conditions significantly reduced the P. syringae pv. tomato population and significantly decreased disease severity. Challenge with P. syringae pv. tomato after A. brasilense was established in the leaves further reduced both the population of P. syringae pv. tomato and disease severity and significantly enhanced plant development. Both bacteria maintained a large population in the rhizosphere for 45 days when each was inoculated separately onto tomato seeds (105 to 106 CFU/g [dry weight] of root). However, P. syringae pv. tomato did not survive in the rhizosphere in the presence of A. brasilense. Foliar inoculation of A. brasilense after P. syringae pv. tomato was established on the leaves did not alleviate bacterial speck disease, and A. brasilense did not survive well in the phyllosphere under these conditions, even in a mist chamber. Several applications of a low concentration of buffered malic acid significantly enhanced the leaf population of A. brasilense (>108 CFU/g [dry weight] of leaf), decreased the population of P. syringae pv. tomato to almost undetectable levels, almost eliminated disease development, and improved plant growth to the level of uninoculated healthy control plants. Based on our results, we propose that A. brasilense be used in prevention programs to combat the foliar bacterial speck disease caused by P. syringae pv. tomato.

Implications of plant growth promoting Klebsiella sp. CPSB4 and Enterobacter sp. CPSB49 in luxuriant growth of tomato plants under chromium stress

Chemosphere ◽  
2020 ◽  
Vol 240 ◽  
pp. 124944 ◽  
Author(s):  
Pratishtha Gupta ◽  
Vipin Kumar ◽  
Zeba Usmani ◽  
Rupa Rani ◽  
Avantika Chandra ◽  
...  
Keyword(s):  
Plant Growth ◽  
Tomato Plants ◽  
Luxuriant Growth ◽  
Plant Growth Promoting ◽  
Chromium Stress ◽  
Growth Promoting

scholarly journals Evaluation of Pseudomonas sp. for its multifarious plant growth promoting potential and its ability to alleviate biotic and abiotic stress in tomato (Solanum lycopersicum) plants

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
Sangeeta Pandey ◽  
Shikha Gupta
Keyword(s):  
Plant Growth ◽  
Seed Treatment ◽  
Acc Deaminase ◽  
Hydrocyanic Acid ◽  
Rrna Gene ◽  
Pgp Traits ◽  
Tomato Plants ◽  
Biochemical Characterisation ◽  
Plant Growth Promoting ◽  
Growth Promoting

Abstract1-Aminocyclopropane-1-carboxylate (ACC) deaminase activity is one of the most beneficial traits of plant growth promoting (PGP) rhizobacteria responsible for protecting the plants from detrimental effects of abiotic and biotic stress. The strain S3 with ACC deaminase activity (724.56 nmol α-ketobutyrate mg−1 protein hr−1) was isolated from rhizospheric soil of turmeric (Curcuma longa), a medicinal plant, growing in Motihari district of Indian state, Bihar. The halotolerant strain S3, exhibited optimum growth at 8% (w/v) NaCl. It also exhibited multiple PGP traits such as indole acetic acid production (37.71 μg mL−1), phosphate solubilization (69.68 mg L−1), siderophore, hydrocyanic acid (HCN) and ammonia production as well as revealed antagonism against Rhizoctonia solani. The potential of isolated strain to alleviate salinity stress in tomato plants was investigated through pots trials by inoculating strain S3 through-seed bacterization, soil drenching, root dipping as well as seed treatment + soil drenching. The strain S3 inoculated through seed treatment and soil drenching method led to improved morphological attributes (root/shoot length, root/shoot fresh weight and root/shoot dry weight), photosynthetic pigment content, increased accumulation of osmolytes (proline and total soluble sugar), enhanced activities of antioxidants (Catalase and Peroxidase) and phenolic content in salt stressed tomato plants. The biochemical characterisation, FAMEs analysis and 16S rRNA gene sequencing revealed that strain S3 belongs to the genus Pseudomonas. The overall findings of the study revealed that Pseudomonas sp. strain S3 can be explored as an effective plant growth promoter which stimulate growth and improve resilience in tomato plants under saline condition.

scholarly journals The Production of ACC Deaminase and Trehalose by the Plant Growth Promoting Bacterium Pseudomonas sp. UW4 Synergistically Protect Tomato Plants Against Salt Stress

2019 ◽  
Vol 10 ◽  
Author(s):  
Ma. del Carmen Orozco-Mosqueda ◽  
Jin Duan ◽  
Mercedes DiBernardo ◽  
Elizabeth Zetter ◽  
Jesús Campos-García ◽  
...  
Keyword(s):  
Salt Stress ◽  
Plant Growth ◽  
Acc Deaminase ◽  
Pseudomonas Sp ◽  
Tomato Plants ◽  
Plant Growth Promoting ◽  
Growth Promoting

scholarly journals Induction of Bacterial Canker Resistance in Tomato Plants Using Plant Growth Promoting Rhizobacteria

2019 ◽  
Vol 13 (1) ◽  
pp. 215-222 ◽  
Author(s):  
Yuliya Kolomiiets ◽  
Ivan Grygoryuk ◽  
Artur Likhanov ◽  
Lyudmila Butsenko ◽  
Yaroslav Blume
Keyword(s):  
Plant Growth ◽  
Plant Growth Promoting Rhizobacteria ◽  
Cell Suspensions ◽  
Systemic Resistance ◽  
Plant Growth Promoting Bacteria ◽  
Bacterial Canker ◽  
Tomato Plants ◽  
High Productivity ◽  
Plant Growth Promoting ◽  
Growth Promoting

Background: By inducing the production of inhibitory allelochemicals and mechanisms of systemic resistance plant growth promoting bacteria (PGPB) help plants to cope with stresses. Materials and Methods: In this study cell suspensions of Bacillus subtilis, Pseudomonas fluorescens or Azotobacter chroococcum were used to test the efficacy of these PGPB in inducing resistance in tomato (Lycopersicon esculentum Mill) against Clavibacter michiganensis subsp michiganensis, a bacteria known to cause canker disease. To test this hypothesis, seedlings of Chaika variety, characterized by short growing, early-ripening, high productivity and resistance against fusarium and the C. michiganensis strain ІZ-38 isolated in Kyiv were employed. Results and Conclusion: The use of cell suspensions of the PGPB B. subtilis, A. chroococcum or P. fluorescens induced an increment in the resistance of tomato plants against the causative agent of bacterial canker (C. michiganensis subsp. michiganensis) by 42–50%. PGPB in fact promoted in C. michiganensis infected tomato plants: i) the accumulation of chlorophyll a and b and carotenoids; ii) the thickening of the upper and lower epidermis of leaves; iii) the deposition of biopolymers with protective properties in epidermal cells; iv) the activity of the peroxidase enzyme and v) the net productivity of photosynthesis.

scholarly journals Plant growth-promoting endophytic bacteria versus pathogenic infections: an example ofBacillus amyloliquefaciensRWL-1 andFusarium oxysporumf. sp.lycopersiciin tomato

PeerJ ◽  
2017 ◽  
Vol 5 ◽  
pp. e3107 ◽  
Author(s):  
Raheem Shahzad ◽  
Abdul Latif Khan ◽  
Saqib Bilal ◽  
Sajjad Asaf ◽  
In-Jung Lee
Keyword(s):  
Plant Growth ◽  
Bacillus Amyloliquefaciens ◽  
Root Zone ◽  
Disease Incidence ◽  
Lower Amount ◽  
Bacterial Endophytes ◽  
Tomato Plants ◽  
Plant Growth Promoting ◽  
Growth Promoting

Fungal pathogenic attacks are one of the major threats to the growth and productivity of crop plants. Currently, instead of synthetic fungicides, the use of plant growth-promoting bacterial endophytes has been considered intriguingly eco-friendly in nature. Here, we aimed to investigate the in vitro and in vivo antagonistic approach by using seed-borne endophyticBacillus amyloliquefaciensRWL-1 against pathogenicFusarium oxysporumf. sp.lycopersici. The results revealed significant suppression of pathogenic fungal growth byBacillus amyloliquefaciensin vitro. Further to this, we inoculated tomato plants with RWL-1 andF. oxysporumf. sp.lycopersiciin the root zone. The results showed that the growth attributes and biomass were significantly enhanced by endophytic-inoculation during disease incidence as compared toF. oxysporumf. sp.lycopersiciinfected plants. Under pathogenic infection, the RWL-1-applied plants showed increased amino acid metabolism of cell wall related (e.g., aspartic acid, glutamic acid, serine (Ser), and proline (Pro)) as compared to diseased plants. In case of endogenous phytohormones, significantly lower amount of jasmonic acid (JA) and higher amount of salicylic acid (SA) contents was recorded in RWL-1-treated diseased plants. The phytohormones regulation in disease incidences might be correlated with the ability of RWL-1 to produce organic acids (e.g., succinic acid, acetic acid, propionic acid, and citric acid) during the inoculation and infection of tomato plants. The current findings suggest that RWL-1 inoculation promoted and rescued plant growth by modulating defense hormones and regulating amino acids. This suggests that bacterial endophytes could be used for possible control ofF. oxysporumf. sp.lycopersiciin an eco-friendly way.

scholarly journals Transgenic tomato plants alter quorum sensing in plant growth-promoting rhizobacteria

2008 ◽  
Vol 6 (5) ◽  
pp. 442-452 ◽  
Author(s):  
Jorge Barriuso ◽  
Beatriz Ramos Solano ◽  
Rupert G. Fray ◽  
Miguel Cámara ◽  
Anton Hartmann ◽  
...  
Keyword(s):  
Quorum Sensing ◽  
Plant Growth ◽  
Plant Growth Promoting Rhizobacteria ◽  
Transgenic Tomato ◽  
Tomato Plants ◽  
Transgenic Tomato Plants ◽  
Plant Growth Promoting ◽  
Growth Promoting
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