Biological Control of Pathogens and Plant Growth Promotion Potential of Fluorescent Pseudomonads

2012 ◽  
pp. 77-110 ◽  
Author(s):  
R. Subashri ◽  
G. Raman ◽  
Natarajan Sakthivel
Keyword(s):  
Biological Control ◽  
Plant Growth ◽  
Plant Growth Promotion ◽  
Growth Promotion ◽  
Fluorescent Pseudomonads

Evaluation of bacteria isolated from rice for plant growth promotion and biological control of seedling disease of rice

2001 ◽  
Vol 47 (10) ◽  
pp. 916-924 ◽  
Author(s):  
Tika B Adhikari ◽  
C M Joseph ◽  
Guoping Yang ◽  
Donald A Phillips ◽  
Louise M Nelson
Keyword(s):  
Biological Control ◽  
Plant Growth ◽  
Plant Growth Promotion ◽  
Growth Promotion ◽  
Disease Incidence ◽  
Control Plant ◽  
16S Rrna Genes ◽  
Rrna Genes ◽  
Bacterial Strains ◽  
Seedling Disease

Of 102 rhizoplane and endophytic bacteria isolated from rice roots and stems in California, 37% significantly (P [Formula: see text] 0.05) inhibited the growth in vitro of two pathogens, Achlya klebsiana and Pythium spinosum, causing seedling disease of rice. Four endophytic strains were highly effective against seedling disease in growth pouch assays, and these were identified as Pseudomonas fluorescens (S3), Pseudomonas tolaasii (S20), Pseudomonas veronii (S21), and Sphingomonas trueperi (S12) by sequencing of amplified 16S rRNA genes. Strains S12, S20, and S21 contained the nitrogen fixation gene, nifD, but only S12 was able to reduce acetylene in pure culture. The four strains significantly enhanced plant growth in the absence of pathogens, as evidenced by increases in plant height and dry weight of inoculated rice seedlings relative to noninoculated rice. Three bacterial strains (S3, S20, and S21) were evaluated in pot bioassays and reduced disease incidence by 50%–73%. Strain S3 was as effective at suppressing disease at the lowest inoculum density (106 CFU/mL) as at higher density (108 CFU/mL or undiluted suspension). This study indicates that selected endophytic bacterial strains have potential for control of seedling disease of rice and for plant growth promotion.Key words: biological control, plant growth promotion, endophytes, rice, seedling disease.

scholarly journals Evaluation of rhizobacteria of some medicinal plants for plant growth promotion and biological control

2014 ◽  
Vol 59 (2) ◽  
pp. 273-280 ◽  
Author(s):  
Eman A. Ahmed ◽  
Enas A. Hassan ◽  
K.M.K. El Tobgy ◽  
E.M. Ramadan
Keyword(s):  
Biological Control ◽  
Medicinal Plants ◽  
Plant Growth ◽  
Plant Growth Promotion ◽  
Growth Promotion

scholarly journals Genomic Analysis of the 1-Aminocyclopropane-1-Carboxylate Deaminase-Producing Pseudomonas thivervalensis SC5 Reveals Its Multifaceted Roles in Soil and in Beneficial Interactions With Plants

2021 ◽  
Vol 12 ◽  
Author(s):  
Francisco X. Nascimento ◽  
Paola Urón ◽  
Bernard R. Glick ◽  
Admir Giachini ◽  
Márcio J. Rossi
Keyword(s):  
Biological Control ◽  
Plant Growth ◽  
Pseudomonas Syringae ◽  
Plant Growth Promotion ◽  
Growth Promotion ◽  
Genomic Analysis ◽  
Acc Deaminase ◽  
Quorum Quenching ◽  
Cucumber Plant

Beneficial 1-aminocyclopropane-1-carboxylate (ACC) deaminase-producing bacteria promote plant growth and stress resistance, constituting a sustainable alternative to the excessive use of chemicals in agriculture. In this work, the increased plant growth promotion activity of the ACC deaminase-producing Pseudomonas thivervalensis SC5, its ability to limit the growth of phytopathogens, and the genomics behind these important properties are described in detail. P. thivervalensis SC5 displayed several active plant growth promotion traits and significantly increased cucumber plant growth and resistance against salt stress (100mmol/L NaCl) under greenhouse conditions. Strain SC5 also limited the in vitro growth of the pathogens Botrytis cinerea and Pseudomonas syringae DC3000 indicating active biological control activities. Comprehensive analysis revealed that P. thivervalensis SC5 genome is rich in genetic elements involved in nutrient acquisition (N, P, S, and Fe); osmotic stress tolerance (e.g., glycine-betaine, trehalose, and ectoine biosynthesis); motility, chemotaxis and attachment to plant tissues; root exudate metabolism including the modulation of plant phenolics (e.g., hydroxycinnamic acids), lignin, and flavonoids (e.g., quercetin); resistance against plant defenses (e.g., reactive oxygens species-ROS); plant hormone modulation (e.g., ethylene, auxins, cytokinins, and salicylic acid), and bacterial and fungal phytopathogen antagonistic traits (e.g., 2,4-diacetylphloroglucinol, HCN, a fragin-like non ribosomal peptide, bacteriocins, a lantipeptide, and quorum-quenching activities), bringing detailed insights into the action of this versatile plant-growth-promoting bacterium. Ultimately, the combination of both increased plant growth promotion/protection and biological control abilities makes P. thivervalensis SC5 a prime candidate for its development as a biofertilizer/biostimulant/biocontrol product. The genomic analysis of this bacterium brings new insights into the functioning of Pseudomonas and their role in beneficial plant-microbe interactions.

Role of iTrichoderma/i secondary metabolites in plant growth promotion and biological control.

2017 ◽  
pp. 411-426 ◽  
Author(s):  
S Jyoti ◽  
R. S. Rajput ◽  
B Kartikay ◽  
S Surendra ◽  
H. B. Singh
Keyword(s):  
Biological Control ◽  
Secondary Metabolites ◽  
Plant Growth ◽  
Plant Growth Promotion ◽  
Growth Promotion
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