scholarly journals Effect of Plant Growth Promoting Rhizobacteria (PGPRs) and Chemical Fertilizer Application on Solanum tuberosum L. Cultivars in Aeroponic Culture System and Field Conditions

2021 ◽  
Vol 11 (2) ◽  
Keyword(s):  
Solanum Tuberosum ◽  
Plant Growth ◽  
Culture System ◽  
Solanum Tuberosum L ◽  
Plant Growth Promoting Rhizobacteria ◽  
Fertilizer Application ◽  
Chemical Fertilizer ◽  
Field Conditions ◽  
Plant Growth Promoting ◽  
Growth Promoting

scholarly journals Whole-Genome Sequences of Three Plant Growth-Promoting Rhizobacteria Isolated from Solanum tuberosum L. Rhizosphere in Tanzania

2020 ◽  
Vol 9 (20) ◽  
Author(s):  
Becky N. Aloo ◽  
Ernest R. Mbega ◽  
Billy A. Makumba ◽  
Ines Friedrich ◽  
Robert Hertel ◽  
...  
Keyword(s):  
Solanum Tuberosum ◽  
Plant Growth ◽  
Complete Genome ◽  
Solanum Tuberosum L ◽  
Plant Growth Promoting Rhizobacteria ◽  
Whole Genome ◽  
Genome Sequences ◽  
Content Type ◽  
Plant Growth Promoting ◽  
Growth Promoting

We present here the complete genome sequences of plant growth-promoting Klebsiella sp. strain MPUS7, Serratia sp. strain NGAS9, and Citrobacter sp. strain LUTT5, isolated from rhizosphere soils and tubers of potato (Solanum tuberosum L.) plants growing in the northern and southern highlands of Tanzania.

scholarly journals In vitro and in planta antagonistic effects of plant growth-promoting rhizobacteria consortium against soilborne plant pathogens of Solanum tuberosum and Solanum lycopersicum

2020 ◽  
Vol 367 (13) ◽  
Author(s):  
Marika Pellegrini ◽  
Claudia Ercole ◽  
Chiara Di Zio ◽  
Federica Matteucci ◽  
Loretta Pace ◽  
...  
Keyword(s):  
Solanum Tuberosum ◽  
Plant Growth ◽  
Solanum Lycopersicum ◽  
Plant Pathogens ◽  
Solanum Tuberosum L ◽  
Plant Growth Promoting Rhizobacteria ◽  
Dual Culture ◽  
Plant Growth Promoting ◽  
Growth Promoting

ABSTRACT Potatoes (Solanum tuberosum L.) and tomatoes (Solanum lycopersicum L.), among the main crops belonging to the Solanaceae family, are attacked by several pathogens. Among them Fusarium oxysporum f. sp. radicis-lycopersici and Rhizoctonia solani are very common and cause significant losses. Four plant growth-promoting rhizobacteria, Azospirillum brasilense, Gluconacetobacter diazotrophicus, Herbaspirillum seropedicae and Burkholderia ambifaria were tested against these pathogens. In vitro antagonistic activities of single strains were assessed through dual culture plates. Strains showing antagonistic activity (G. diazotrophicus, H. seropedicae and B. ambifaria) were combined and, after an in vitro confirmation, the consortium was applied on S. lycopersicum and S. tuberosum in a greenhouse pot experiment. The bioprotection was assessed in pre-emergence (infection before germination) and post-emergence (infection after germination). The consortium was able to successfully counteract the infection of both F. oxysporum and R. solani, allowing a regular development of plants. The biocontrol of the fungal pathogens was highlighted both in pre-emergence and post-emergence conditions. This selected consortium could be a valid alternative to agrochemicals and could be exploited as biocontrol agent to counteract losses due to these pathogenic fungi.

scholarly journals Anti-fungal secondary metabolites and hydrolytic enzymes from rhizospheric bacteria in crop protection: a review

2021 ◽  
Vol 44 (2) ◽  
pp. 69-84
Author(s):  
Farhana Tasnim Chowdhury ◽  
Nazia Rifat Zaman ◽  
Mohammad Riazul Islam ◽  
Haseena Khan
Keyword(s):  
Secondary Metabolites ◽  
Plant Growth ◽  
Fungal Pathogens ◽  
Hydrolytic Enzymes ◽  
Plant Growth Promoting Rhizobacteria ◽  
Field Conditions ◽  
Plant Host ◽  
Wide Range ◽  
Plant Growth Promoting ◽  
Growth Promoting

Plant growth promoting rhizobacteria (PGPR) residing in soil rhizosphere provide enormous beneficial effects to a plant host producing diverse secondary metabolites and enzymes useful for plant growth and protection. Siderophores, antibiotics, volatile compounds and hydrolytic enzymes are the major molecules secreted by the PGPRs, which have substantial antifungal properties and can provide plant protection. These compounds are responsible for the lysis and hyperparasitism of antagonists against deleterious fungal pathogens. Siderophore-producing PGPRs function by depriving the pathogen of iron nutrition. Antibiotics have been reported to be involved in the suppression of different fungal pathogens by inducing fungistasis, inhibition of spore germination, lysis of fungal mycelia. The PGPRs also secrete a wide range of low molecular weight volatile organic compounds (VOCs) that inhibit mycelial growth, sporulation, germination of phytophathogenic fungi, etc. Hydrolytic enzymes, mostly chitinase, protease and cellulose, lyse the cell wall of fungi. Therefore, plant growth-promoting rhizobacteria can be considered as an effective, eco-friendly, and sustainable replacement to the chemical fungicides. There are many PGPRs that perform very well in controlled conditions but not in field conditions, and hence the commercializing of hese products is not easy.  Development of formulations with increased shelf life, a broad spectrum of action and consistent performance under field conditions can pave the way for commercializing the PGPRs at a faster rate. Journal of Bangladesh Academy of Sciences, Vol. 44, No. 2, 69-84, 2020

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