scholarly journals AHL-priming for enhanced resistance as a tool in sustainable agriculture

2020 ◽  
Vol 96 (12) ◽  
Author(s):  
Abhishek Shrestha ◽  
Adam Schikora
Keyword(s):  
Sustainable Agriculture ◽  
Mammalian Cells ◽  
Microbial Consortium ◽  
Bacterial Strains ◽  
Homoserine Lactones ◽  
Acyl Homoserine Lactones ◽  
Enhanced Resistance ◽  
Interesting Approach ◽  
The Impact

ABSTRACT Bacteria communicate with each other through quorum sensing (QS) molecules. N-acyl homoserine lactones (AHL) are one of the most extensively studied groups of QS molecules. The role of AHL molecules is not limited to interactions between bacteria; they also mediate inter-kingdom interaction with eukaryotes. The perception mechanism of AHL is well-known in bacteria and several proteins have been proposed as putative receptors in mammalian cells. However, not much is known about the perception of AHL in plants. Plants generally respond to short-chained AHL with modification in growth, while long-chained AHL induce AHL-priming for enhanced resistance. Since plants may host several AHL-producing bacteria and encounter multiple AHL at once, a coordinated response is required. The effect of the AHL combination showed relatively low impact on growth but enhanced resistance. Microbial consortium of bacterial strains that produce different AHL could therefore be an interesting approach in sustainable agriculture. Here, we review the molecular and genetical basis required for AHL perception. We highlight recent advances in the field of AHL-priming. We also discuss the recent discoveries on the impact of combination(s) of multiple AHL on crop plants and the possible use of this knowledge in sustainable agriculture.

Role of the gut microbiota in airway immunity and host defense against respiratory infections

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Maike Willers ◽  
Dorothee Viemann
Keyword(s):  
Gut Microbiota ◽  
Host Defense ◽  
Gut Microbiome ◽  
Respiratory Infections ◽  
Current Knowledge ◽  
Viral Pathogens ◽  
Commensal Microbiota ◽  
Enhanced Resistance ◽  
The Impact

Abstract Colonization of the intestine with commensal bacteria is known to play a major role in the maintenance of human health. An altered gut microbiome is associated with various ensuing diseases including respiratory diseases. Here, we summarize current knowledge on the impact of the gut microbiota on airway immunity with a focus on consequences for the host defense against respiratory infections. Specific gut commensal microbiota compositions and functions are depicted that mediate protection against respiratory infections with bacterial and viral pathogens. Lastly, we highlight factors that have imprinting effects on the establishment of the gut microbiota early in life and are potentially relevant in the context of respiratory infections. Deepening our understanding of these relationships will allow to exploit the knowledge on how gut microbiome maturation needs to be modulated to ensure lifelong enhanced resistance towards respiratory infections.

The role of N-acyl homoserine lactones in maintaining the stability of aerobic granules

2014 ◽  
Vol 159 ◽  
pp. 305-310 ◽  
Author(s):  
Yaochen Li ◽  
Wen Hao ◽  
Junping Lv ◽  
Yaqin Wang ◽  
Chen Zhong ◽  
...  
Keyword(s):  
Aerobic Granules ◽  
Homoserine Lactones ◽  
Acyl Homoserine Lactones ◽  
The Stability

scholarly journals SpaCBA sequence instability and its relationship to the adhesion efficiency of Lactobacillus casei group isolates to Caco-2 cells.

2014 ◽  
Vol 61 (2) ◽  
Author(s):  
Corinna Markowicz ◽  
Agnieszka Olejnik-Schmidt ◽  
Monika Borkowska ◽  
Marcin T Schmidt
Keyword(s):  
Scintillation Counter ◽  
Sequence Polymorphism ◽  
Lactobacillus Species ◽  
Adhesion Assay ◽  
Bacterial Cells ◽  
Bacterial Strains ◽  
Adhesion Efficiency ◽  
The Impact ◽  
Lactobacillus Spp

The ability to adhere to enterocytes is one of the key features of probiotics. This process involves a number of factors, among which the important role of pili was demonstrated. Some Lactobacillus species are confirmed to have heterotrimeric spaCBA type pili. The aim of this study was to identify spaCBA pili in strains of selected Lactobacillus spp. and assess the impact of their presence and sequence polymorphism on the adhesion of these strains to enterocytes. Total 20 bacterial strains of L. rhamnosus, L. casei and L. paracasei were tested. The presence of pilus specific proteins coding genes spaA, spaB and spaC was verified by PCR in order to identify the presence of sequence polymorphism in the genes possibly affecting the structure of the spaCBA pilus. To correlate spaCBA polymorphism to adhesion capability the adhesion assay was carried out using Caco-2 cell line. The effectiveness of the adhesion was measured using a scintillation counter. The Lactobacillus strains analyzed showed the adhesion to Caco-2 enterocytes capability from 0.6% to 19.6%. The presence of spaCBA pili is a factor increasing the adhesion efficiency of Lactobacillus spp. to Caco-2 enterocytes. Lack of these structures on the surface of bacterial cells results in the reduction in adhesion efficiency, indicating its important role in the adhesion process. But not in all cases the correlation between the presence of protein spaCBA structures and adhesion efficiency was observed, what may indicate the important role of other factors in adhesion of analyzed strains to Caco-2 cells.

scholarly journals CLIMATE CHANGE & AGRICULTURE IN INDIA- EFFECTIVE IMPLEMENTATION OF NATIONAL MISSION FOR SUSTAINABLE AGRICULTURE

2016 ◽  
Vol 4 (11) ◽  
pp. 52-71 ◽  
Author(s):  
Amrit Patel
Keyword(s):  
Climate Change ◽  
Sustainable Agriculture ◽  
Action Plan ◽  
Climatic Variability ◽  
Agricultural Practices ◽  
Farming Communities ◽  
Effective Implementation ◽  
Food Grains ◽  
The Impact

Climate change has been the most serious challenge affecting agriculture in India where direct effects of climate change are expected to be very harsh. India will need to produce estimated 320 MT of food grains by the year 2025. Acknowledging the significant role of Science & Technology, India has since 2008 established “National Action Plan on Climate Change” which includes “National Mission for Sustainable Agriculture [NMSA]” among eight missions. NMSA aims at developing technologies & innovative agricultural practices and strengthening the capacity of farming communities to cope effectively with both climatic variability and changes. Adaptation and mitigation potential is nowhere more pronounced than in India where agricultural productivity remains low and poverty, vulnerability & food insecurity remain high. Against this background this development perspective article attempts to highlight the impact of climate change on agriculture in general and in India in particular and suggests the priority areas to accelerate the process of effective implementation of NMSA launched on June 26, 2015.

Trichomonas tenax and periodontal diseases: a concise review

Parasitology ◽  
2017 ◽  
Vol 144 (11) ◽  
pp. 1417-1425 ◽  
Author(s):  
MATHIEU MARTY ◽  
MATHIEU LEMAITRE ◽  
PHILIPPE KÉMOUN ◽  
JEAN-JACQUES MORRIER ◽  
PAUL MONSARRAT
Keyword(s):  
Potential Role ◽  
Periodontal Diseases ◽  
Epidemiologic Studies ◽  
Oral Microbiome ◽  
Bacterial Strains ◽  
Parasite Detection ◽  
Protozoan Infections ◽  
The Impact ◽  
Gum Disease

SUMMARYPeriodontal diseases (gingivitis and periodontitis), result from a disruption of the host–oral microbiome homoeostasis. Whereas the pathological role of some specific bacterial strains during periodontal diseases is well documented, the impact of parasites in periodontium pathophysiology is still under debate. This review aims to collect data about the prevalence and the potential role of Trichomonas tenax during periodontal diseases. Data from 47 studies revealed that T. tenax prevalence in diseased periodontium ranged from 0 to 94·1%. The prevalence of oral protozoan infections was found to be largely greater in patients with periodontal diseases than with healthy periodontium. The parasite detection was mainly performed by direct microscopy. Trichomonas tenax presence was clearly correlated with periodontal disease. The high heterogeneity of its periodontal prevalence may be correlated with the diversity of the population screened (age, sex, systemic diseases), and the methods used for diagnosis. This protozoan seems to have the capacity to be involved in the inflammatory process of gum disease. Animal experimentation, using relevant physiopathological models of periodontitis, needs to be performed to investigate the ability of T. tenax to cause and/or worsen the disease. Further investigations using standardized experimental designs of epidemiologic studies are also needed.

The role of LasR active site amino acids in the interaction with the Acyl Homoserine Lactones (AHLs) analogues: A computational study

2019 ◽  
Vol 86 ◽  
pp. 113-124 ◽  
Author(s):  
Maicol Ahumedo Monterrosa ◽  
Johan Fabian Galindo ◽  
Javier Vergara Lorduy ◽  
Jorge Alí-Torres ◽  
Ricardo Vivas-Reyes
Keyword(s):  
Amino Acids ◽  
Active Site ◽  
Computational Study ◽  
Homoserine Lactones ◽  
Acyl Homoserine Lactones

scholarly journals Isolation and Characterization of Phosphate Solubilizing Microbes from Rock Phosphate Mines and Their Potential Effect for Sustainable Agriculture

2021 ◽  
Vol 13 (4) ◽  
pp. 2151
Author(s):  
Awais Qarni ◽  
Motsim Billah ◽  
Khadim Hussain ◽  
Sabir Hussain Shah ◽  
Waqas Ahmed ◽  
...  
Keyword(s):  
Sustainable Agriculture ◽  
Rock Phosphate ◽  
P Uptake ◽  
Bacterial Strains ◽  
Maize Crop ◽  
Penicillium Sp ◽  
Isolation And Characterization ◽  
Fungal Isolates ◽  
Phosphate Solubilizing ◽  
The Impact

Continuous application of phosphate (P) mineral to soil renders apatite addition during each crop growing season which is of great concern from a sustainable agriculture viewpoint. Use of efficient phosphate solubilizing microbes (PSB) is one of the most effective ways to solubilize this apatite mineral in the soil. The current study targeted hydroxyapatite mines to explore, isolate and characterize efficient P solubilizers to solubilize apatite in the soil. Efficiency of isolated microbes to solubilize rock phosphate (hydroxyapatite) and tri-calcium phosphate (TCP) as well as indole-3-acetic acid (IAA) and 1-aminocyclopropane-1-carboxylate deaminase (ACC) activity were tested. Identification and phylogenetic analysis of bacterial and fungal isolates were carried out by 16S rRNA and internal transcribed spacer (ITS) rDNA sequence analyses, respectively. The isolated bacterial strains were identified as Staphylococcus sp., Bacillus firmus, Bacillus safensis, and Bacillus licheniformis whereas fungal isolates were identified as Penicillium sp. and Penicillium oxalicum. Results showed that the impact of identified strains in combination with three phosphate fertilizers sources (compost, rock phosphate and diammonium phosphate (DAP)) was conspicuous on maize crop grown in pot. Both bacterial and fungal strains increased the P uptake by plants as well as recorded with higher available P in post-harvested soil. Penicillium sp. in combination with compost resulted in maximum P-uptake by plants and post-harvest soil P contents, compared to other combinations of P sources and bio-inoculants. Screening and application of efficient P solubilizers can be a better option to utilize the indigenous phosphate reserves of soil as well as organic amendments for sustainable agriculture.

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