Plant Growth-Promoting Rhizobacteria: Benign and Useful Substitute for Mitigation of Biotic and Abiotic Stresses

2019 ◽  
pp. 81-101 ◽  
Author(s):  
Jyoti Singh ◽  
Prachi Singh ◽  
Shatrupa Ray ◽  
Rahul Singh Rajput ◽  
Harikesh Bahadur Singh
Keyword(s):  
Plant Growth ◽  
Abiotic Stresses ◽  
Plant Growth Promoting Rhizobacteria ◽  
Biotic And Abiotic Stresses ◽  
Plant Growth Promoting ◽  
Growth Promoting

scholarly journals Deciphering the Symbiotic Plant Microbiome: Translating the Most Recent Discoveries on Rhizobia for the Improvement of Agricultural Practices in Metal-Contaminated and High Saline Lands

Agronomy ◽  
2019 ◽  
Vol 9 (9) ◽  
pp. 529 ◽  
Author(s):  
Agnese Bellabarba ◽  
Camilla Fagorzi ◽  
George C. diCenzo ◽  
Francesco Pini ◽  
Carlo Viti ◽  
...  
Keyword(s):  
Plant Growth ◽  
Crop Yield ◽  
Heavy Metal Contamination ◽  
Agricultural Practices ◽  
Plant Growth Promoting Rhizobacteria ◽  
Plant Genome ◽  
Biotic And Abiotic Stresses ◽  
Beneficial Effects ◽  
Plant Growth Promoting ◽  
Growth Promoting

Rhizosphere and plant-associated microorganisms have been intensely studied for their beneficial effects on plant growth and health. These mainly include nitrogen-fixing bacteria (NFB) and plant-growth promoting rhizobacteria (PGPR). This beneficial fraction is involved in major functions such as plant nutrition and plant resistance to biotic and abiotic stresses, which include water deficiency and heavy-metal contamination. Consequently, crop yield emerges as the net result of the interactions between the plant genome and its associated microbiome. Here, we provide a review covering recent studies on PGP rhizobia as effective inoculants for agricultural practices in harsh soil, and we propose models for inoculant combinations and genomic manipulation strategies to improve crop yield.

scholarly journals Draft Genome Sequence of the Root-Colonizing Fungus Trichoderma harzianum B97

2017 ◽  
Vol 5 (13) ◽  
Author(s):  
Stéphane Compant ◽  
Jonathan Gerbore ◽  
Livio Antonielli ◽  
Aline Brutel ◽  
Monika Schmoll
Keyword(s):  
Plant Growth ◽  
Genome Sequence ◽  
Trichoderma Harzianum ◽  
Abiotic Stresses ◽  
Agricultural Soil ◽  
Draft Genome ◽  
Draft Genome Sequence ◽  
Biotic And Abiotic Stresses ◽  
Plant Growth Promoting ◽  
Growth Promoting

ABSTRACT Trichoderma harzianum is one of the most beneficial microorganisms applied on diverse crops against biotic and abiotic stresses and acts also as a plant growth-promoting fungus. Here, we report the genome of T. harzianum B97, originating from a French agricultural soil and used as a biofertilizer that can tolerate abiotic stresses.

scholarly journals Seed-Biopriming of Durum Wheat with Diazotrophic Plant Growth Promoting Bacteria (PGPB) Enhanced Tolerance to Fusarium Head Blight (FHB) and Salinity Stress

2019 ◽  
Author(s):  
Adel Hadj Brahim ◽  
Mouna Jlidi ◽  
Lobna Daoud ◽  
Manel Ben-Ali ◽  
Asmahen Akremi ◽  
...  
Keyword(s):  
Plant Growth ◽  
Durum Wheat ◽  
Abiotic Stresses ◽  
Growth Promotion ◽  
Plant Growth Promoting Bacteria ◽  
Head Blight ◽  
Biotic And Abiotic Stresses ◽  
Plant Growth Promoting ◽  
Growth Promoting

Abstract Background There is growing interest in the use of bioinoculants based on plant growth promoting bacteria (PGPB) to promote plant growth under biotic and abiotic stresses. To our knowledge much work has not been, thus far, done on seedbiopriming of durum wheat for tolerance to biotic and abiotic stresses. In the present work, we report detailed account of the effectiveness a potent bacterial strain with proven plant growth-promoting ability and antimicrobial activity. The isolate was selected following screening of several bacterial strains isolated from halophytes that grow in a coastal saline soil in Tunisia for their role in enhancing durum wheat tolerance to both salinity stress and head blight disease. Results Accordingly, Bacillus strains MA9, MA14, MA17 and MA19 were found to have PGPB characteristics as they produced indole-3-acetic acid, siderophores and lytic enzymes, fixed free atmospheric nitrogen, and solubilized inorganic phosphate, in vitro. The in vivo study that involved in planta inoculation assays under control (25 mM NaCl) and stress (125 mM NaCl) conditions indicated that all PGPB strains significantly (P < 0.05) increased the total plant length, dry weight, root area, seed weight, nitrogen, protein and total mineral content. On the other hand, strain MA17 reduced Fusarium Head Blight (FHB) disease incidence in wheat explants by 64.5%, showing that the strain has antifungal activity as was also displayed by in vitro inhibition study. Conclusions Both in vitro and in vivo studies showed that MA9, MA14 MA9, MA14, MA17 and MA19 strains were able to play the PGPB role. Yet, biopriming with Bacillus strain MA17 offered the highest bioprotection against FHB, plant growth promotion, and salinity tolerance. Hence, the MA17 strain should further be evaluated under field condition and formulated for commercial production. Besides, the strain could further be evaluated for its potential role in bioprotection and growth promotion of other crop plants. We believe, the strain has potential to significantly contribute to wheat production in the arid and semi-arid region, especially the salt affected Middle Eastern Region, besides its potential role in improving wheat production under biotic and abiotic stresses in other parts of the world.

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