Interactive effects of Ag-nanoparticles, salicylic acid, and plant growth promoting rhizobacteria on the physiology of wheat infected with yellow rust

2020 ◽  
Vol 102 (4) ◽  
pp. 1215-1225
Author(s):  
Asghari Bano ◽  
Ummat-ul-Habib
Keyword(s):  
Salicylic Acid ◽  
Plant Growth ◽  
Ag Nanoparticles ◽  
Yellow Rust ◽  
Plant Growth Promoting Rhizobacteria ◽  
Interactive Effects ◽  
Plant Growth Promoting ◽  
Growth Promoting

scholarly journals Mitigation of salinity in chickpea by Plant Growth Promoting Rhizobacteria and salicylic acid

2019 ◽  
Vol 8 (3) ◽  
pp. 221-228
Author(s):  
Aneela Riaz ◽  
Munazza Rafique ◽  
Muhammad Aftab ◽  
M. Amjad Qureshi ◽  
Hina Javed ◽  
...  
Keyword(s):  
Salicylic Acid ◽  
Plant Growth ◽  
Plant Growth Promoting Rhizobacteria ◽  
Plant Growth Promoting ◽  
Growth Promoting

scholarly journals Systemic Disease Protection Elicited by Plant Growth Promoting Rhizobacteria Strains: Relationship Between Metabolic Responses, Systemic Disease Protection, and Biotic Elicitors

2008 ◽  
Vol 98 (4) ◽  
pp. 451-457 ◽  
Author(s):  
B. Ramos Solano ◽  
J. Barriuso Maicas ◽  
M. T. Pereyra de la Iglesia ◽  
J. Domenech ◽  
F. J. Gutiérrez Mañero
Keyword(s):  
Salicylic Acid ◽  
Plant Growth ◽  
Disease Severity ◽  
Systemic Disease ◽  
Plant Growth Promoting Rhizobacteria ◽  
Disease Suppression ◽  
Plant Growth Promoting ◽  
Growth Promoting ◽  
Systemic Responses ◽  
Dependent Pathway

A study of plant defensive systemic responses induced by three plant growth promoting rhizobacteria (PGPR) on Arabidopsis thaliana Col 0 against Pseudomonas syringae pv. tomato DC3000 at the biochemical and transcriptional levels is reported in this paper. All three strains decreased disease severity when applied to A. thaliana prior to pathogen inoculation. At the biochemical level, each of the three strains induced ethylene (ET) when incubated with 1-amino-cyclopropane-1-carboxylic acid, and salicylic acid (SA) production in the plant. Plants treated with each of the three strains were also reduced in salicylic acid production after pathogen challenge compared to untreated controls. This effect was more marked in plants treated with Chryseobacterium balustinum AUR9, the strain most effective in decreasing disease severity. The expression level of PR1, a transcriptional marker of the SA-dependent pathway in C. balustinum AUR9-treated plants, is fourfold that of controls while the expression of PDF1.2, a transcriptional marker for the SA-independent pathway, is not induced. C. balustinum cell wall lipopolysaccharides, being putative bacterial elicitor molecules, are able to reproduce this systemic induction effect at low doses. From these observations, we hypothesize that certain PGPR strains are capable of stimulating different systemic responses in host plants. With C. balustinum AUR9, the SA-dependent pathway is stimulated first, as indicated by increases in SA levels and PR1 expression, followed by induction of the SA-independent pathway, as indicated by the increases in ET concentrations. The effects of both pathways combined with respect to disease suppression appear to be additive.

scholarly journals The Coupling Effects of Plant Growth Promoting Rhizobacteria and Salicylic Acid on Physiological Modifications, Yield Traits, and Productivity of Wheat under Water Deficient Conditions

Agronomy ◽  
2019 ◽  
Vol 9 (9) ◽  
pp. 524 ◽  
Author(s):  
Emad Hafez ◽  
Alaa El Dein Omara ◽  
Alshaymaa Ahmed
Keyword(s):  
Salicylic Acid ◽  
Plant Growth ◽  
Nutrient Uptake ◽  
Water Deficit ◽  
Field Experiments ◽  
Plant Growth Promoting Rhizobacteria ◽  
Soil Microbial ◽  
Plant Growth Promoting ◽  
Growth Promoting ◽  
Soil Microbial Population

Water deficit and soil infertility negatively influence the growth, nutrient uptake, and productivity of wheat. Plant growth promoting rhizobacteria (PGPR) and salicylic acid (SA) were evaluated as possible solutions to mitigate the impacts of water deficit on growth, physiology, productivity, and nutrient uptake of wheat (Triticum aestivum L. cv. Sakha 95). Over two growing seasons (2016/2017 and 2017/2018) field experiments were conducted to examine eight combinations of two water treatments (water deficit and well-watered) with four soil and foliar treatments (control, PGPR, SA, and combination of PGPR + SA). The application of PGPR increased soil microbial activity resulting in increased field capacity and available soil water. Likewise, the application of the combined treatment of PGPR and SA significantly increased chlorophyll content, relative water content, stomatal conductance, soil microbial population, and showed inhibitory impacts on proline content, thus improving yield-related traits, productivity, and nutrient uptake (N, P, K) under water deficit compared to the control treatment. The results show that the integrative use of PGPR in association with SA may achieve an efficacious strategy to attenuate the harmful effects of water deficit as well as the amelioration of productivity and nutrient uptake of wheat under water-deficient conditions.

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