Diversity and N-acyl-homoserine lactone production by Gammaproteobacteria associated with Avicennia marina rhizosphere of South Indian mangroves

Viswanath, Ganga; Sekar, Jegan; Baskaran, Viswanathan; Raju, Kathiravan; Prabavathy, V. R.

doi:10.1016/j.syapm.2015.03.008

Cited by 24 publications

(11 citation statements)

References 35 publications

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“…It has been suggested that there could be more than one AHL-regulatory system, and that more than one signal molecule could be produced by AHL synthases (Viswanath et al, 2015). The high heterogeneity in AHL production is in agreement with the high genetic diversity bacterial species.…”

Section: Discussionmentioning

confidence: 99%

“…This might be due to the procurement of homologous AHL genes by means of horizontal gene flow. Thus, the production of similar types of AHL molecules in different genera might help interspecies communication in the natural environment where mixed communities are often present (Viswanath et al, 2015). …”

Section: Discussionmentioning

confidence: 99%

“…DNA was amplified using the universal primers 8F (5′-AGACTTTGATYMTGGCTCAG-3′) and 1512R (5′-GTGAAGCTTACGG(C/T)TAGCTTGTTACGACTT-3′) as previously described (Viswanath et al, 2015). Primers were obtained from the BGI (Shenzhen, China).…”

Section: Methodsmentioning

confidence: 99%

“…Identification of AHL-producing microbes in rhizospheres of wetland plants could provide important information for understanding bacteria-bacteria and plant-bacteria interactions (Venturi and Keel, 2016). However, to this day, the diversity features of AHL signaling molecules in wetland sediments and their potential effects on plant health are still limited, and only a few studies have focused on mangrove plants (Zeng et al, 2014; Viswanath et al, 2015). …”

Section: Introductionmentioning

confidence: 99%

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Diverse Profiles of AI-1 Type Quorum Sensing Molecules in Cultivable Bacteria from the Mangrove (Kandelia obovata) Rhizosphere Environment

Lao

Jin

et al. 2016

Front. Microbiol.

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Mangrove rhizosphere environment harbors diverse populations of microbes, and some evidence showed that rhizobacteria behavior was regulated by quorum sensing (QS). Investigating the diverse profiles of QS molecules in mangrove ecosystems may shed light on the bacterial roles and lead to a better understanding of the symbiotic interactions between plants and microbes. The aims of the current study focus on identifying AI-1 type QS signals, i.e., acyl homoserine lactones (AHLs), in Kandelia obovata rhizosphere environment. Approximately 1200 rhizobacteria were screened and 184 strains (15.3%) tested were positive. Subsequent 16s rRNA gene sequencing and dereplication analyses identified 24 species from the positive isolates, which were affiliated to three different phyla, including Proteobacteria, Firmicutes, and Actinobacteria. Thin-layer chromatography separation of extracts revealed diverse AHL profiles and detected at least one active compound in the supernatant of these 24 cultivable AHL-producers. The active extracts from these bacterial isolates were further evaluated by ultra performance liquid chromatography-mass spectrometry, and the carbon side chain length ranged from C4 to C14. This is the first report on the diversity of AI-1 type auto-inducers in the mangrove plant K. obovata, and it is imperative to expand our knowledge of plant-bacteria interactions with respect to the maintenance of wetland ecosystem health.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Diverse Profiles of AI-1 Type Quorum Sensing Molecules in Cultivable Bacteria from the Mangrove (Kandelia obovata) Rhizosphere Environment

Lao

Jin

et al. 2016

Front. Microbiol.

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“…Such patterns may result from the selective pressure that occurs when related organisms share the same ecological niche ). Conversely, bacteria from different genera producing similar types of AHL compounds may promote interspecies communication in the mixed communities of a natural environment (Viswanath et al, 2015).…”

Section: Discussionmentioning

confidence: 99%

Quorum Sensing and Quorum Quenching in the Mediterranean Seagrass Posidonia oceanica Microbiota

et al. 2017

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Posidonia oceanica (L.) Delile is an endemic Mediterranean seagrass angiosperm. The taxonomic diversity of the Posidonia-associated microbiota has previously been inventoried using culture-based and culture-independent approaches. However, little is known about the type of chemical interactions that occur between the cells within this microbiota. In this study, we isolated 60 bacterial strains from the leaves and rhizomes of P. oceanica and evaluated their capacity to communicate through quorum sensing. We found 6 strains able to emit 8 different types of quorum sensing acyl homoserine lactones, identified through UHPLC-HRMS/MS after bioguided fractionation of large cultures. We also identified 19 strains able to produce furanosyl diester borate, another type of quorum sensing autoinducer. Also, 5 strains were found to produce quorum quenching compounds. Finally, as quorum sensing is known to be involved in biofilm production, we also tested whether strains positive to our biotests were able to produce biofilms. Collectively, these data reveal the importance of examining chemical interactions within this bacterial consortium associated with P. oceanica that could have an impact on the physiology of this key Mediterranean seagrass.

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Investigation of the Structural and Functional Microbial Diversity in Indian Mangroves

2019

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Diversity and N-acyl-homoserine lactone production by Gammaproteobacteria associated with Avicennia marina rhizosphere of South Indian mangroves

Cited by 24 publications

References 35 publications

Diverse Profiles of AI-1 Type Quorum Sensing Molecules in Cultivable Bacteria from the Mangrove (Kandelia obovata) Rhizosphere Environment

Diverse Profiles of AI-1 Type Quorum Sensing Molecules in Cultivable Bacteria from the Mangrove (Kandelia obovata) Rhizosphere Environment

Quorum Sensing and Quorum Quenching in the Mediterranean Seagrass Posidonia oceanica Microbiota

Investigation of the Structural and Functional Microbial Diversity in Indian Mangroves

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