A comparative evaluation towards the potential of Klebsiella sp. and Enterobacter sp. in plant growth promotion, oxidative stress tolerance and chromium uptake in Helianthus annuus (L.)

2019 ◽  
Vol 377 ◽  
pp. 391-398 ◽  
Author(s):  
Pratishtha Gupta ◽  
Vipin Kumar ◽  
Zeba Usmani ◽  
Rupa Rani ◽  
Avantika Chandra ◽  
...  
Keyword(s):  
Oxidative Stress ◽  
Plant Growth ◽  
Stress Tolerance ◽  
Helianthus Annuus ◽  
Plant Growth Promotion ◽  
Comparative Evaluation ◽  
Growth Promotion ◽  
Oxidative Stress Tolerance ◽  
Helianthus Annuus L ◽  
Chromium Uptake

Potential Microbial Consortium for Plant Growth Promotion of Sunflower (Helianthus annuus L.)

2014 ◽  
Vol 85 (2) ◽  
pp. 635-642 ◽  
Author(s):  
E. Leo Daniel Amalraj ◽  
Devasantosh Mohanty ◽  
G. Praveen Kumar ◽  
Suseelendra Desai ◽  
SK. Mir Hassan Ahmed ◽  
...  
Keyword(s):  
Plant Growth ◽  
Helianthus Annuus ◽  
Plant Growth Promotion ◽  
Microbial Consortium ◽  
Growth Promotion ◽  
Helianthus Annuus L

scholarly journals Genomic Analysis of the Endophytic Stenotrophomonas Strain 169 Reveals Features Related to Plant-Growth Promotion and Stress Tolerance

2021 ◽  
Vol 12 ◽  
Author(s):  
Kristina Ulrich ◽  
Michael Kube ◽  
Regina Becker ◽  
Volker Schneck ◽  
Andreas Ulrich
Keyword(s):  
Plant Growth ◽  
Stress Tolerance ◽  
Plant Growth Promotion ◽  
Growth Promotion ◽  
Whole Genome Sequence ◽  
Plant Colonization ◽  
Rrna Gene ◽  
Promote Plant Growth ◽  
Physiological Tests

Plant-associated Stenotrophomonas isolates have great potential for plant growth promotion, especially under stress conditions, due to their ability to promote tolerance to abiotic stresses such as salinity or drought. The endophytic strain Stenotrophomonas sp. 169, isolated from a field-grown poplar, increased the growth of inoculated in vitro plants, with a particular effect on root development, and was able to stimulate the rooting of poplar cuttings in the greenhouse. The strain produced high amounts of the plant growth-stimulating hormone auxin under in vitro conditions. The comparison of the 16S rRNA gene sequences and the phylogenetic analysis of the core genomes showed a close relationship to Stenotrophomonas chelatiphaga and a clear separation from Stenotrophomonas maltophilia. Whole genome sequence analysis revealed functional genes potentially associated with attachment and plant colonization, growth promotion, and stress protection. In detail, an extensive set of genes for twitching motility, chemotaxis, flagella biosynthesis, and the ability to form biofilms, which are connected with host plant colonization, could be identified in the genome of strain 169. The production of indole-3-acetic acid and the presence of genes for auxin biosynthesis pathways and the spermidine pathway could explain the ability to promote plant growth. Furthermore, the genome contained genes encoding for features related to the production of different osmoprotective molecules and enzymes mediating the regulation of stress tolerance and the ability of bacteria to quickly adapt to changing environments. Overall, the results of physiological tests and genome analysis demonstrated the capability of endophytic strain 169 to promote plant growth. In contrast to related species, strain 169 can be considered non-pathogenic and suitable for biotechnology applications.

scholarly journals Nematicidal Volatiles from Bacillus atrophaeus GBSC56 Promote Growth and Stimulate Induced Systemic Resistance in Tomato against Meloidogyne incognita

2021 ◽  
Vol 22 (9) ◽  
pp. 5049
Author(s):  
Muhammad Ayaz ◽  
Qurban Ali ◽  
Ayaz Farzand ◽  
Abdur Rashid Khan ◽  
Hongli Ling ◽  
...  
Keyword(s):  
Oxidative Stress ◽  
Antioxidant Enzymes ◽  
Plant Growth ◽  
Plant Growth Promotion ◽  
Growth Promotion ◽  
Control Plant ◽  
Nematicidal Activity ◽  
Systemic Resistance ◽  
Tomato Plants ◽  
Nematicidal Volatiles

Bacillus volatiles to control plant nematodes is a topic of great interest among researchers due to its safe and environmentally friendly nature. Bacillus strain GBSC56 isolated from the Tibet region of China showed high nematicidal activity against M. incognita, with 90% mortality as compared with control in a partition plate experiment. Pure volatiles produced by GBSC56 were identified through gas chromatography and mass spectrometry (GC-MS). Among 10 volatile organic compounds (VOCs), 3 volatiles, i.e., dimethyl disulfide (DMDS), methyl isovalerate (MIV), and 2-undecanone (2-UD) showed strong nematicidal activity with a mortality rate of 87%, 83%, and 80%, respectively, against M. incognita. The VOCs induced severe oxidative stress in nematodes, which caused rapid death. Moreover, in the presence of volatiles, the activity of antioxidant enzymes, i.e., SOD, CAT, POD, and APX, was observed to be enhanced in M. incognita-infested roots, which might reduce the adverse effect of oxidative stress-induced after infection. Moreover, genes responsible for plant growth promotion SlCKX1, SlIAA1, and Exp18 showed an upsurge in expression, while AC01 was downregulated in infested plants. Furthermore, the defense-related genes (PR1, PR5, and SlLOX1) in infested tomato plants were upregulated after treatment with MIV and 2-UD. These findings suggest that GBSC56 possesses excellent biocontrol potential against M. incognita. Furthermore, the study provides new insight into the mechanism by which GBSC56 nematicidal volatiles regulate antioxidant enzymes, the key genes involved in plant growth promotion, and the defense mechanism M. incognita-infested tomato plants use to efficiently manage root-knot disease.

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.

scholarly journals Streptomyces consortia-mediated plant defense against Fusarium wilt and plant growth-promotion in chickpea

2021 ◽  
pp. 104961
Author(s):  
Sravani Ankati ◽  
Vadlamudi Srinivas ◽  
Sambangi Pratyusha ◽  
Subramaniam Gopalakrishnan
Keyword(s):  
Plant Growth ◽  
Plant Defense ◽  
Fusarium Wilt ◽  
Plant Growth Promotion ◽  
Growth Promotion
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